This is the best video I’ve seen on the subject. You completely changed my mind on the subject. The penetration was 6 of 1 and 1/2 a dozen of the other. But, the trajectory at distance, and the speed is what swayed me over to the lighter arrow. Good job.
Pretty comprehensive test, I especially appreciate that you used the paper jig to plot the trajectory at different distances. That plays a pretty significant factor if you find yourself wanting to take a shot at 30 yards or more.
The math on this is actually simple. Momentum = mass x velocity. If your arrows are using the bow/string energy efficiently, then a heavier arrow will go a little slower and a lighter arrow a little faster…. Yet both will have roughly identical momentum. That being the case, speed has the overall advantage. Thirty years ago the argument might have had merit. But there have been such advances in technology in every aspect of archery that today, the energy is used very efficiently.
Best video on this subject I’ve ever seen! Thanks for taking the time to do this video! Like too see the difference between 400 & 450 grains. Thanks again
All good info! I would like to see this comparing the 450gr(i would not consider that light, that is midweight or some guys would consider it heavy!) versus a 350 grain arrow. I shot 350 grain arrows without really thinking about it for 25 years- basic 400 spine/8.4gpi arrow, stock insert, stock nock, 2" blazers, 100 grain head. Everyone I knew shot essentially the same thing. I changed to a 530 grain setup a few years ago but didnt like the 'rainbow' of the arrow past about 25 yards, I took 50 grains off my setup so shooting 480 grains now which seems to be a nice middle ground as it really flattened it out past 25 yds.
Thank you so much for your time and effort in this test. It seems like the speed as a lot more advantageous over all. Plus I have always been a heavy arrow shooter. So thank you for changing my mind!!
What a time consuming test you’ve done. Very informative results. I do quite a bit of testing myself and can certainly appreciate how much effort you guys put into this!
I just watched a video where a guy put a 450 clean through a scapula, perfect triangular hole through the middle of it, through a lung, through the liver, and out the other side. They’re all going to kill an elk. A heavier arrow isn’t going to kill an elk any better than a lighter arrow if you take a bad shot. The arrow weight horse is dead, everyone stop beating it.
there is a guy with a channel called WapitiWear and he has some good tests of shooting heavy bone (fresh elk shoulder )with various weights and broadheads, if anyone is curious about that. You did an awesome job with your testing.
This is the test I’ve been waiting for. I’ve always went for a lighter arrow and more speed because I’ve always felt I got better performance. And this just proved my point. The kinetic energy difference is 5ftlbs. SPEED KILLS!
Great testing guys !! I have read and seen studies done on impact of lite and heavy shafts. Lite shafts slow down at a greater pace, which I guess really doesn't matter because they start out going faster to begin with. I have read that the heavier shaft retains more energy down range, making them a better choice If you encounter bone.
Thank you for taking the time to do this. I shoot 434 gr. @ 65#, 30"DL, and both deer last year were complete passthroughs, with the being a quartering shot through the backbone and coming out just behind the opposite shoulder(I forgot to reset my sight in the heat of the moment, and shot the doe at 24 yds with my sight set at 42 yds from the previous days practice. She was quartering away slighty up hill). If I were shooting a 650 gr arrow, I would have shot a foot over her back. Advantage to the lighter, faster arrow, and that shot was with NAP DK 4 hybrid.
100%….the way I look at it even if the heavy arrows gives you a slight advantage in penetration (which we have not seen) it is not worth the flat shooting faster advantages you gain!
I appreciate the work that was put in to make this video. BUT, It drives me nuts when penetration tests are done on man made targets. The truth is told when you run it through an animal. 18 years of bow hunting and I'm 1000% convinced the heavier high FOC arrow is the ticket for big game hunting. I shoot a 74#, 30" draw and In the beginning I used 385gr light, fast arrows and I rarely got a pass through on deer. 7-8 years ago I jumped up to 470gr arrows and getting a pass through became common with the arrow sticking in the dirt a couple inches. Early 2022 I beefed up to a 540gr arrow with 14.9% FOC and last fall I buried the arrow 6-7" in the dirt after a steep quartering away pass through on a mature buck. The arrow entered high, very back of the rib cage and came out the opposite armpit. The sound it made when the arrow hit that buck was a very noticeable, different, more violent sound. A pass through would have been unlikely with my previous arrows. The real world results are more than enough for me.
How do you get consistent data from shooting an animal as every single shot hits different…..it’s impossible. That is the big issue for us hunters, what we need and want to test on is impossible to test on so you have to do the next best thing…..if we want to talk about shooting animals and modern results with modern equipment need to look at guys that shoot lots and lots of stuff each year not 2-3 deer….guys like Dave Holt and Joel Maxfield…Dave shoots over 150 animals a year in Africa and is sponsored by no one….he shoots a 450 grain arrow…..why is that? Why would a technical bow junkie that has studied this stuff for 40 years and shoots modern equipment do this working for a culling/meat operation, only getting paid for killing results…….Because of trajectory and speed and still having plenty of penetration. Anyway glad you are having success with your setup…best of luck to you and thanks for the comment and watching the video.
Dear Joe miles just finished watching your video on heavy vs. Light, love your content, would also like to say I heard you talkin about you wanting an arrow that is great for whitetail hunting, I've been hunting with archery equipment for close to thirty-five years I used Mathews bows and I currently have a vxr 28 in also have a Mathews z7 which I hunted deer for quite a few years with but my setup is always been the same I use a 402 grain arrow nap 100 grain spitfire that has been my broadhead of choice for at least the last 27 and I say that because I believe I bought them back in the early 90s and I've had so much success with those type of broadheads I will not change to any other brand there is accurate as your field points I know this because all I do is screw my broadhead on and make sure it is tuned to my fletching and I can literally hit the same spot or right next to it within a quarter inch of my field and I love that because I don't have to worry about all that fixed-blade broadhead tuning crap , I can be hunting within minutes with a broadhead after removing my field. Keep up the scientific work love the stuff.
Great test, thank you. I have seen a few others, and these results keep happening. Everyone is quite surprised. I think speed is important, think of a pneumatic concrete nailer vs hitting the concrete nail with a hammer. The hammer can produce more force, but the shock impact of the 22 cartridge allows it to embed in the concrete.
The reason people argue Bone, is because 650 grains is the bone breaking threshold according to the asbee research. This is why you see so many shoulder shots in videos where 95% of the arrow is sticking out of the deer as it runs away! But in addition, the single bevel broadhead also is a factor because they break bone better. Having killed some 25 deer since going down this rabbit hole myself, I can tell you that it does penetrate and break bone better. Also, and equally important though FEW people ever talk about it, the heavy arrow make the bow quieter, and the slower arrow makes less noise going through the air, and research has shown that deer are not jumping the string, but rather jumping the sound of the arrow going toward it as evidenced with slow motion footage of multiple deer in field but only the one being shot at doing the massive ducking.
Thank you for the comment and taking the time to watch the video….I personally believe KE pays a larger role than Momentum when it comes to penetration but question for you. Same size (length and diameter) arrow….one is 450 and shoots at 300 FPS….the other is a 650 and shoots at 150 FPS….which is higher in booth KE and Momentum? Run this equation and let’s talk some more about “weight” being a bench mark…..thanks again!
@UClbxp001BrdRv48dWBYB5Ow might want to rerun your math there Phil on the 450/650 KE on the arrows I tested…..I didn’t say KE was king. You said 650 was the threshold for bone breaking according to the ashbee report (I think you mean Ashby)……if that is the case and you would certainly agree an arrow with more KE and more momentum would penetrate better please go back and also reread my question to you on the 650 and 450 grain arrows at the different SPEEDS I noted. My point here is weight is absolutely not the threshold and lots of guys have been confused and sent down the wrong path with arrow selection.
I’m glad someone finally did this. The debate about arrow weight has become rather ridiculous. The advocates for “Ashby” type weights, rarely if ever discuss trajectory or yardage estimation. Shot placement will always be the most important criteria for determining success, in my opinion. If you do nothing but hunt hogs over feeders at 20 yards, trajectory and yardage estimation are non issues, for the rest of us, these things matter. While preparing for our Cape Buffalo hunt, we played with a lot of different arrow setups. The one we settled on was much lighter than the conventional wisdom would suggest, but we went with what we thought made sense. I settled on a 578 grain, 17% FOC arrow with a single bevel broadhead, arrow speed was 266 fps. Most scoffed at the setup, including the PH’s in Africa. I wish I could post a picture, but the results were surprising. The arrow went completely through the bull, sticking 10 inches out of the opposite side, he made it 20 yards before piling up. I believe a setup that is well balanced between weight and speed will be more effective over a broader range of hunting situations. Thanks for the video, well done.
@@Rhyno430 he sure does, but you rarely hear that. So much emphasis is placed on total weight, FOC, and the bone breaking threshold of 650 grain arrows. Personally, I shoot the heaviest arrow I can that gives me 280-300 fps, which is within my acceptable trajectory for hunting
Thank you for doing this. I appreciate the time and effort you put into it. Something seems off to me. Speed deprivation is real and a lighter object decelerates faster than a heavier one which at distance can be an issue. As for the penetration, that is thought provoking for sure.
In theory the difference should be magnified considering that the heavy arrow is moving 40fps slower at that distance. Kinetic energy > momentum. My bet would be the light arrow penetrates 2-3 inches more.
@@titansfan2104 it's 40 fps slower.. I don't think it would but be cool to see. It's nice y9 see a test with everything the same or as close as possible
It would be interesting to know if it's really more important to have FOC in your build than heavy weight, and some of the assumptions about increased penetration actually come from the fact that you're more likely to gain FOC as your weight goes up? I shoot trad( morrison max 5 super curve, 57lb @ 30") and I just dropped from a 730 grain arrow down to a 550 grain arrow...and I'm seeing better penetration into the medium that I practice on as well. I know the math shouldn't bear this out...but..
Great video Joe! I just wonder how much resistance your getting on the shaft with the insulation board and cardboard only because I've used insulation and cardboard to make a target for target practice. And something else at 450gn arrow is getting towards a heavier setup I would like to see a similar test with a 350gn arrow and a 450gn arrow. Thanks for taking the time to set all this up.
Not to be a hater, i love these videos always chasing some elusive truth or myth. One thing im gonna mention is if you arent getting complete pass through with a 70 bow with a 2 blade fixed broadhead, your analog is way too resilient and something may be causing fiction, perhaps that is the boards and the arrows tend to punch through and really suffer a lot of friction as the shaft follows through. As another comment had mentions maybe finding something that is hard but fracters unpon impact allowing clean arrow travel through it. Anyways great work and thank you!
This was a wonderful video/test. I would have to say the best one ive ever seen done...well done and great effort put in to this..thank you. Now with all that being said, i have to admit, ive seen time and time again people shooting whitetails on hunting videos right in the sweet spot(right behind the shoulder) broadside at 20 yards and under only get half of the arrow or less than half penatrating into the deer? Really i believe what they are considering light is not the same as what you guys are considering light.
These comments are entertaining! I commend you for your efforts on this video, it is well done. I’m curious in one factor that affects penetration, movement. Devise a way to make a target drop at the sound of the shot and see how it affects penetration at 30yds with each of these test arrows. I’ve got a few ideas on how to make this happen. Then compare penetration to a stationary target as well. I think your medium just needs to be ballistics gel covered in hide. My theory is that at the moment of broadhead contact, the heavier arrow flight will be less affected resulting in more penetration. FWIW, I shoot a 469gr arrow. Have a good one! -Jon
That arch though at distance on a heavy arrow would be outrageously unwise if your shooting in the woods, you’d be clipping leaves and branches all day
Your awesome video pretty much runs true with my real-world hunting tests. I'm shooting a 31" 460-grain arrow (125-grain broadhead) with a 29" dl at 67lbs getting 468 fps at 10 yards. I've considered dropping back down to a 100-grain head. I've had very good results at around 440 grains as well with pass-throughs in the sweet spot.
When you’re hunting, it’s not like a deer stops and let’s you range it, turns broad side and you get a clean shot. So if your trajectory is only off @4”in between a 20 & 30yd shot, that’s a lot of forgiveness in the vitals. I’ll take a straighter flight and more forgiveness then a looping shot hoping I got the yardage right! All my opinion of course…
I’m no rocket scientist but I would think anything with more FOC such as shooting a deer and hitting femur bone with 100gr broadhead versus hitting deer in femur with 150gr broadhead the heavier broadhead would definitely be more devastating and more penetration in my book !
Are You sure the heavier setup was flying well? Just looking at the paper tears it appears to be tearing knock low and left? Looking at the velocity numbers at the yardages don't make sense with the heavier setup? This could be very miss leading in both trajectory and penetration testing if the arrow is under spined and or not flying correctly? Thanks for taking the time to do this testing!
thank you for this test it seems to prove that you would need to shoot the heavy and light arrows at the same speed in order to see a greater penetration with the heavier arrow. The fact that when the speed slows down with the heavy arrow it takes away some of the penetration which shows that if you shoot a heavier arrow you also need to up the poundage and draw length in order to maintain speed then for sure we would see the diffs There is so much running around with the heavy arrow stories lately but as you as many others are proving theres no real benefit except if you up the speed on the heavy arrow setup.I would say that a decent fixed blade with a reasonable f.o.c will do the job well
Enjoyed the video. I was just curious if you were shooting different spine arrows I know they were the same diameter and length. I can’t wrap my mind around not having to change either your tune or spine to make up the 200 grain difference
It’s all about finding balance between trajectory and weight. Find an arrow that works with your bow to give you an acceptable trajectory while still maintaining adequate weight and FOC. For me that’s a 475-500 grain arrow, for others it might be more or less.
Great video man. I think one of the biggest problems in this whole debate is what the definition of a light arrow is and what the definition of a heavy arrow is. I think 450 grains is more of a midweight arrow, and 650 grains is an extreme heavy weight Arrow. Everybody's definition is a little bit different. I think you would see way different results if you shot a 320 grain Arrow versus a 520 grain Arrow but I'm never 100% sure of anything! Again great video
Here’s something to think about. It takes 437 grains to make 1 ounce. 1 ounce!!! People think 1/2 ounce moving 50 fps slower is going to penetrate more based on weight? I don’t think so. This video lines up with what I’ve been thinking. Make sure everything is tuned well and your arow is flying perfect and you have a good broadhead
Was that the same broadhead or was there 2 new ones used? If it was used once the blades could of been dulled? Also, could the target of moved on impact?
This is a fascinating debate. I can't remember the last time I shot a deer over 20 yards in Minnesota or Wisconsin. At whitetail deer ranges, how much of a factor is speed or trajectory? I hunt primarily in the timber and shoot most of my deer in the morning. They aren't nervously feeding in a food plot and my bow isn't as noisy as what I hear people shooting on the hunting shows. Some of this debate is due to self-inflicted wounds - where a person is shooting a dull or wide-cut expandable broadhead, because they can't tune their bow, and their arrow is failing on rib bones. By the way, 450 grains is not the "light" arrow that people are using - dip down around the 385 grain range and test again.
@@Killada3pt I cited 450 grains because that is the "light" arrow used by Joe Miles in his video. Most people using light arrows are below 400 grains, which is why I suggested using a 385 grain arrow as Joe's light arrow representative rather that 450 grains.
@@h-minus2212 And ALL of this heavy vs light BS is based on the Ashby reports. And they say 500 minimum for whitetails. So for the purpose of the comparison, 450 is light, particularly out of the setup he used.
I shoot Easton axis 5mm match grade 340 spine. 60# at 28.5 inches and I shoot a mathews v3x 29. The grain weigh is 430. And I get great speed. And they are tuff arrows.
my simple way to do this was to keep adding weight to the shaft until it made the drop after 20 yds too much then I backed off for a happy medium ended up adding 70 grains to the insert. works great
50 yds or 150 ft: (150 ft ÷ 250 fps) − (150 ft ÷ 280 fps) = .064 sec. An arrow traveling at 250 fps vs 280 fps and the time they take to arrive at 50 yds... slightly more than HALF OF ONE TENTH of a second difference in arrival time AT FIFTY YARDS. What were the arrow setups for the weight changes? Were you using a stiffer spine for the increased weight up front and the changing dynamic spine? Did you tune the bow for each arrow setup? Or were your arrows flying poorly with some of the arrows? A few physics formulas (drag, ballistic coefficient, momentum) prove the idea that heavy arrows maintain velocity down range. Several people have tested this while tuning the bow to every arrow setup. There's actually a few youtube videos showing it.
Another good video. I can't tell you how many commenters have said that my setup is too light for any penetration especially if I hit bone and it's just not true. I easily blow through whitetails with a light arrow at 315fps and it breaks ribs and shoulders with ease. I wouldn't use this set-up if it didn't work so well. I don't understand the heavy arrow fans with high foc. The trajectory is terrible. I used to shoot heavy arrows with high foc back when we didn't have much of a choice and I would never go back to that. I use one pin 0-40 yards and at 40 I put the pin 3/4 up on the deers body. I like the simplicity of one pin. Nothing cluttering my view and no confusion during the moment of truth
My question is why your results are different from mine … when I shoot heavier arrows into my targets designed to stop an arrow they punch through and the lighter arrows stop short…???
If you want to argue factors like trajectory, speed degradation, etc on the topic fine. There is no argument however that heavy arrows penetrate better balanced with higher FOC, single bevel broadheads, and properly tuned, than a lighter arrow without those factors. Virtually everyone at this point is familiar with the Ashby reports by name at this point. I find few people have actuallty read through the data collected. For starters Dr. Ashby states numerous times to use the heaviest arrow that has a trajectory you find suitable. Arrow weight is but one of 12 very important factors even though that's always what the argument comes down to. The science and data backs up that an arrow that checks all 12 of those boxes will hands down out penetrate any arrow setup that doesn't but certainly a light arrow shooting a mechanical broadhead with mid-low FOC.
I’m disabled and I shoot a 370 crossbow with pile driver bolts/ arrows with 125 grain Thorn Rift 2.2 inch cut unexposed blade until impact mechanical broadhead and it shoots them like darts and I don’t shoot for shoulder I try to shoot the crease so to speak and i believe my basic set up is about as deadly as possible considering !
Thanks for taking time to do this. As you can see from some of the comments on this video, some people will keep finding some sort of excuse why your test isn’t valid but I think you did as much of a real world test as possible. Great work.
Yeah I tried to prevent as much of that as I could but man this is so debating and people are in one camp or the other and no one likes to be wrong including me and I would have bet the heavy would have done better but in all my testing it just doesn’t
I deal with testing technical rescue equipment and systems and the debates about testing methodology, while frustrating sometimes, is what drives the industry forward. The multitude of variables is what makes it difficult and by sharing testing ideas the backyard testers are getting better. I do agree with others that your test medium is not ideal but it is a step forward from steel drums. So thank you for making us all better. I am fascinated with the speed/weight debate. No one argues That a 470 nitro has more knockdown power than a 308 even if it’s slower. I wouldn’t hunt whitetail with it but I wouldn’t hunt whitetail with a 17HMR either. No matter how flat it shoots.
Any possibility of repeating the penetration test but replacing the wood slats with a rack of pork ribs, and multiple shots for each weight to account for any randomness? Theory is that any really stiff target isn’t going to open up when penetrated and will put a lot of friction on the shaft of the arrow. Really interesting stuff. You also did a great job talking about the other factors that come into play besides penetration
Man we have shot through almost every possible medium including Pork Scapulas and the results are the same….math shows the heavy arrow should penetrate a little better but we haven’t seen it
Kind of a tough one, I prefer a lighter arrow for a flatter trajectory and higher speed. Sneaking through limbs and shooting under a low canopy. But I could see the penetration benefit of a heavier arrow depending on the target. Like how a bucket of gravel can stop a bullet but won’t stop an arrow. Not going too see huge differences between the arrows because it’s not like you are changing the amount of energy released from the bow, just how efficiently it transfers to the arrow. Differences of a couple %. Lighter arrow can only take so much energy before the rest of the energy is dissipated through the bow, but the heavier arrow doesn't get as high of results with equal amount energy transferred to the arrow.
Kudos to you sir. I have never drank the uber heavy arrow kool-aide when it comes to a modern compound bow. The simple fact of the matter is this. A bow of a certain poundage, draw length, brace height, etc, is going to impart a consistent amount of energy to an arrow fired from it. You can vary the weight all you want but a slower 650 grain arrow is going to be imparted with basically the same amount of kinetic energy as the faster 450 grain arrow. The numbers may not line up perfectly but the difference will not be anything worth the loss of arrow speed.
I would recommend something around 400-425 grains. Should get you plenty of weight but also keep you between 280 and 290 fps depending on your draw length.
@@nicolaalberti7736 I think you are…I would personally like to be up closer to 65+ pounds but I’m sure with a good fixed blade head you will be in good shape
I really appreciate your efforts on these tests. There are some things to note though. 650 with a high FOC is what matters 30% or something. Now this is just the study of breaking bone with single bevel 650 doesn’t care about bones. Getting that to fly good and such obviously matters which you guys did. But this science is a lot to take in. Its not about 650. Its about finding the heaviest that your bow can shoot optimally. People get stuck on the grains. 450 with a fixed head will penetrate absolutely you are going about 0.5 slugs of momentum or so and do not waste energy in opening blades. I would sincerely encourage you to do the test again with the heaviest setup that your bow can handle. Go into the 500-600 grains so do this again with 500, 525, 550, 560, 575 and 600 and also use your 450 as a guide one of these 500 series will out perform your 450 guaranteed. 450 though is a good penetrator with fixed heads. I would not recommend mechanical even though they will kill they may not always pass through. Now why 500 series instead of the 600 because not every bow handles it well and some bows end up with the diminishing returns. I can tell you from my own evidence: i have seen arrows bounce off of deer under 50 yards many times and hardly ever have i seen pass through. I have seen 350 grain crossbow bolts not go through deer at 40 yards. My own evidence 350 on a target was a few inch penetration. 415 was half shaft 565 is fletchings buried in she target there is most certainly a benefit to heavy but heavy doesn’t mean 650. Here is a good example why do you use 450 instead of 330? Because it hits harder and does better so now go one more up 650 is too much for the bow thats really all this test proved. The 30 years of study is not 650 it’s literally finding the heaviest that you are happy with that your bow can shoot and handle for your situations. No one ever said you need 650.
@@karl_farbman81 diminishing return happens when the bow reaches beyond its maximum potential. My vertical bow is 700 grains. It does not generate anymore slugs of moment than 650 but loses its speed ridiculously. My crossbow 600 is diminishing 565 is just at its max.
@@karl_farbman81 yes i use chronograph and it also determines the ke and calculators have been super accurate for me. They have been spot on and matched the chrono so i would have to trust that they are accurate with momentum too.
@@karl_farbman81 now i will say too that neither weapon is compound they are both recurves. A compound will have different results especially since the recurve is only 50lb draw vertical and 200 lb draw crossbow. So it is possible a compound with high poundage would definitely be in your speculations possibly. Some people ignore the kinetic energy machine and i do not think that is fully fair for tests on the heavy or light “debate”.
I'm shooting a hoyt vtm 31@81# 28" draw easton 5mm 200 spine arrows with 75 grain brass inserts and 200 grain single bevel vpa s7 tool steel broad heads this is my typical set up for hunting northern bc for moose and elk. I do hunt deer but typically run a 500-530 set ups with sevr broadheads same 81# my 650 set up has gone thru some pretty crazy stuff moose shoulders elk shoulders dosnt matter. Btw the 650s are moving along at 260 fps
I need a magnum arrow set up have some Axis 400 spine left over...Mathews v327...drawl length is 27.5....#70weight...looking for something bone crushing only shoot 20 to 30 yards out the stand....I hit a Ohio whitetail buck this weekend with a Axis arrow 100 grain swhacker...it was like i hit a wall just bounced off the deer and shattered my arrow...small blood trail no deer.
I've found anything over 500 grains the penitration is marginal. I elk hunt so I'll stay around 500g, 460g is considered as light as you need to go for elk, moose etc along with a single bevel broad head. 6 bulls in the last 12 yrs proved this for me. Great test and was done as well as possible, thanks. Your 470 would be considered a great weight out west
Higher FOC translates into more kinetic energy loss down range due to slower arrow recovery and a larger cross wind signature. Increasing your FOC will hurt you significantly at long range.
The best test you can do is shoot your 20 yard pin at 30 yards. Pretty easy to be 10 yards off either direction occasionally. The most forgiving arrow is the one that will hit closest to its mark.
If the arrows were moving the same speed, the heavier object would produce more kinetic energy. But a heavier arrow moves slower out of a bow that is set to a specific, unchanging setup than a lighter one. His was a 29 inch draw length with a 70lb draw weight I believe. At that setting, a 450gr arrow would produce approx. 84 lb-ft of kinetic energy. A 650gr arrow would produce approx. 72 lb-ft. Every different bow setup has a sweet spot where it's capable of producing the most kinetic energy possible by firing a arrow that weighs a certain amount. His sweet spot is right around 450gr. This would be modeled but going lighter, say a 350gr arrow. It would be screaming along, should do the best right? But with his setup it would be making around 80-81 lb-ft of kinetic energy and not penetrate as well as the 450gr arrow. Lighter arrows go faster, heavier arrows go slower, out of a bow that's doing the exact same thing every time. The trick is finding the optimal weight of arrow, to match up with the force your bow is capable of making, therefore producing the most kinetic energy possible. That equals penetration.
You answered your own question when you said "we know a mechanical wont penetrate as well as a fixed" but yet in your target it did. Your medium isnt even close to what a live animal is. Your test proved the medium you chose is good at stopping arrows period. You cant defy Newton. I do appreciate the effort. With all that said 450gn arrow is an excellent whitetail arrow and will get the job done if you do your part.
Yes, but a it has to be a very similar medium to real life scenario. I’m not sold on their medium, mainly the insulation and plywood, but I’m glad they did this. You can shoot a 300gr arrow and a 1200gr into a cinder block or 1” thick rubber mat medium and probably get the same very low penetration for both. But those results point more towards those mediums being very good at stopping an arrow than what arrow weight would actually penetrate a deer.
I'm at the explanation of the penetration test media and I can tell you now what will happen before he ever shoots an arrow. The plywood will not break out like bone will. It will create so much drag on the shaft that you won't see a measurable difference in penetration. I'm sure he shoots field points too! This is yet another test that means nothing.
This isn’t a knock against your test. Just an observation. The only way anyone can come close to simulating an animal would be to devise a way to lubricate the arrow all the way through the test medium from the instant it penetrates the skin as you built it. I would be interested to see the results of that type of test.
It sounds like you had your mind made up before you made the video. Shoot what you like and everyone else can shoot what they like. Hunters need to stop arguing with each other.
I appreciate the work you put in for this! It’s an interesting debate. Rather than give my reasons for the heavier arrows, can you do a short video explaining why YOU think the Ashby report is wrong about penetration? Based on this video, I would think Dr. Ashby was doing his experiments on a different planet and that everything we were taught in 8th grade science was a lie.
I don’t think the Ashby report is “wrong”…..what I have seen is KE plays a bigger roll in penetration than they think (speed really matters more than they discuss) and I am not a fan of drawing penetration results from shooting a dead Buffalo over and over again as that data is 100% flawed as the arrow hits different and different body parts each time. An arrow with higher KE and Higher Momentum by our “8th grade” science should penetrate better with all other things equal….but I do not see momentum or FOC as leading factors of penetration…..that is my testing and several others guys I have talked with about this that have millions of $$ worth of equipment to do lab type testing on….not these backyard test like mine that are seen on RU-vid. Anyway appreciate the comment and you checking out the video.
