Best Load Development Method 

Loved the video, have noticed that quite a few shooters at matches don’t do load development. They pick a recipe from an article, or web site, or a buddy and that’s it. When I develop a load for a particular bullet I use a similar chicken scratch board, and use a 3 or 5 shot group. And after I find the best group I’ll use the chronograph on another range date. I use LC brass, some times mixed,some times same lot and date, powders are Reloader 15: AA2520, or MR2000. Primers are REM 7/12, or CCI 450. Bullets are Sierra or Hornady. Great videos good shooting this year.

As for OBT and GRT, I advice to tune to the GRT to match your actual MV measured by Labradar

I believe you can learn a lot from 3 shot groups. Every time I go to the range I shoot several 3 shot groups. I keep a record of every trip I take after several trips and many groups I take the average. I think that works great for hunting rifles and I never fire fouling shots just like I wouldn't on a hunting scenario

So far I don't understand much about guns, this video made me understand more about guns. Thank you you have share will

24.6 gives a velocity node and accuracy node

you explained things quite thoroughly even though I only understood half of it, it was nice to learn to something new today. thanks for this video.

That's amazing work 👍

Thanks for another interesting video. Everything thoroughly explained. I enjoy hearing your process!

Love this video Amazing work

I develop loads for hunting and defense of dangerous game. I use Hornady's ballistic calculator for initial load development, then 3 shot groups at the range to check accuracy, then a swinging bucket of sand similar to the one in the back of P.O. Ackleys book to test performance. I consider barrel harmonics when building a rifle but never in regards to my reloads but have fired a friends Safary grade Browning in 338 with the Boss system and was quite impressed. I think I'll have to look into that aspect further. Consistent trajectory is more important to me than flat shooting. Not being a competitive shooter my accuracy only needs to match down range performance. My loads vary to the task at hand and the best depends on it's purpose. There always seems to be a trade off.

Love the video, very interesting and informative. Thanks for sharing

Another very interesting video. Very detailed and easy to understand.

Man, that was a great video in depth yet simplified, been doing this for 60 years try to keep up with new stuff ;old dog keeps going back to three and five shot groups change the charge weight try to learn and have fun doing it! Brass prep is a pain in the butt

Nice video. You could try the Cortina seating depth method, where he only changes seating depth by .003" from group to group

Thanks for explaining in detail about load developement. Very nice information provided by you in the video. I like it.

Thanks for the insight. Your explanation about "LOAD DEVELOPMENT METHOD" is very easy to understand.

Great information, I know will put a couple ways into my next development for my results. I have always done a five shot group for a node and also look at velocity to what I am trying to accomplish.

That's amazing work 👏👏

Your explanation is amazing I learned something new

Very good video. It was great to see a head to head comparison of the various methods. It’s a science, but a lot of art too, considering the hard choices one must make in deciding on what is the optimal charge. What amazes me is how different winners use such different methods to find their way to the podium.

Very good job. Great learning method. Describe nicely. You are very good.

Hi Crusty. First time seeing one of your videos. AWESOME summary, with details and data. I’ve been studying in this area for a while, very familiar with the different methods you presented, but I’ve never seen (or even considered!) them all rolled together like this. VERY CREATIVE approach, really informative. I think I’m going to do this on my next load development. 1 comment though: as long as the groups are limited to 3 shots, the statistical issue still exists. Even so, the video shows how the various methods can converge when using the same base data. Awesome, a new subscriber today!

Amazing work

Wow it's a really cool and outstanding method. Thanks for sharing with us❤️

Wonderful test comparison!

Thanks for the great comparison.

Your videos is really innovative

I haven’t seen anyone else combine all of them in this manner. That was interesting to see them all laid out like that. I believe that will be insightful for many. I’ll be checking out your other videos.

Excellent video. I’d go with your analysis. I liked your data acquisition technique. Plan your work and work your plan. I’ve been hand loading since 72’ still using my trusty Bonanza CoAx press I bought in 72’. I don’t shoot over 400 yards or heavy for caliber bullets. I’m old school as far as hardware goes but do go along with more scientific methods such as OBT. I bought QuickLoad several years ago and put in my loads for my 222, 244, & 7x57 and they were very close to OBT times. My loads were developed in the mid 70’s and early 80’s with no chronograph. Again your video showed a lot of thought and work went into your bench work, computer work and presentation. Kudos and thank you for your service. One of my best friends (RIP John Hilmer) was a Marine, VN Vet and got me into centerfire shooting and reloading in 72’. I was in the AF and in VN for TET 68’. Keep on keeping on. I’ll have to check out the software you’re using. 👍👍

You cannot learn enough from a 3 shot group.

Fantastic content! Your overlay of the combined methods data is the best use of crayon cookies I’ve seen in a long time. EmpIrical data beats theory every time, so as Jacob Bynum says, believe the bullet. The OCW that Dan Newberry developed continues to prove itself and is very efficient on components.

Very informative video thank you sir

great content keep it coming thank you

This is actually 'Best load development method '❤

Very helpful. 24.3gr then vary the seating depth if you can until you exceed mag length.

Great content sir. I get the clear information of subject" LOAD DEVELOPMENT METHOD ". I am a physics student, so its more helpful for me. Your presentation was very understandable and unique. Thank you sir❤❤

Great informative video thanks for share

I try to choose a powder to achieve the velocity I want, that will achieve close to 100% case fill. Nosler data has case fill percentages in their load data. Had good luck with this method.

Nyc contents about development method

Your explanation is very good,very infomative content,I like it very much,well done,keep it up,thnks for sharing this informative video❤❤.

I am 2300 rds into 300 BO 100 yd accuracy. I am not at the range my usual mon. shooting session. Cold and windy, i was looking forward to testing 168 Hornady AMAX compared to Nosler Custom competition. 10 mph 168, .76, 175 Nosler, 1". today is just cold with 10 mph done that. i use 2 shot groups at 50 yds to compare different powder levels. Check best a 100. 3 & 5 shot groups. Then i go to seating depth at 50 then 100. I had no luck with boat tails, not bad accuracy but tear drop bullet holes. E. Cortina Break solved that problem. My mish mash of what works for me.

3 shot method, lowest SD's, group size and close to bullet makers book listed velocity. Then everything changes on your next change of components. That is why it is fun to reload and test. Then of course there is shooters ability.

Very nice video

Amazing

After many years of loading development, I settled on the following method to identify a practical node. It is more or less a compromise between lowest SD and smallest groups. To verify my method, I observed many reloaders independently develop their loads and the same exact phenom happens. The smallest SD load, then followed a smaller group size. The theory of accurate loading process: In Physics, there is no free lunch. In closed thermodynamics systems such as the internal ballistic solution, the goal is to get: 1) A very low MV SD vs powder charge load 2) Small groups vs powder charge load 3) MV velocity stability vs powder temperature 4) MV velocity stability vs small powder variations 5) MV velocity stability vs primer choice 6) Low vertical dispersion at very long and extremely long ranges vs bullet selection First, let us solve the issues related to goals that we can control pretty easily. More specifically, 3) 4) 5) and 6) 3) Use temperature stable powder such as IMR endurance, Hodgdon Extreme Powder, etc. There are many online tests that you can search and find what powders are the most temperature stable (e.g., H4350) 4) Measure each powder drop to less than 0.1gr accuracy. It is easy to get to 0.02gr (1 extruded kernel) which is worth 0.3fps out of typical load 5) Make a small ladder test and see if the selected primers would produce a smoothly rising curve, if not, do not use those primers. There was a test in this video, do not use the primers that generate seesaw graphs. 6) Use VLD bullets with very low variations in G7 BC. For example, pick VLD bullets with less than 1% variation in G7 BC. Now, here we finished the goals that are virtually 100% influenced by the components Now, let us focus on the loading for the node. What is the node after all? Optimum Barrel Time, OBT node: It is the node (with respect to time) where the bullet leaves the barrel when the muzzle is subjected to the least dilation/contraction due to the powder explosion shock waves Optimum Charge Weight, OCW node: it is the node (with respect to time) where the bullet leaves the barrel when the muzzle is pointing to the same point of impact due to the powder explosion shock waves Optimum Feet per sec, OFPS node: it is the node (with respect to time) where the bullet leaves the barrel with the minimum SD of MV due to the powder explosion shock waves Keeping all parameters the same, changing the powder charge can change the MV and inversely the actual barrel time of the bullet Note: OFPS is my theory why MV SD would shrink for the same powder but by just changing the powder charge. What node are we after? Goal 1) is solved with OFPS node, a theory I introduced in September 2018. Goal 2) is solved with OBT time. The good news, OBT is numerically computed. With the advancement of very accurate radar-based chronographs and internal ballistic solvers, the OBT charge load can be accurately calculated. I had success doing that for few competitive shooters as proof of concept. How about Goal 1) the best way to find it in my experience is to shoot a group of 3-5 shots in a ladder test such as the 6.5group spreadsheet test and find the lowest MV SD The bad news is OBT node (smallest group) and OFPS node (lowest MV SD) don't overlap. Remember, in Physics, there is no free lunch. The good news is both nodes are adjacent and in my experience, if you find the OBT node, the OFPS node is the next step load in the ladder. As groups shrink MV SD will increase and vice versa. So, the best is to find a compromise load between OBT/OFPS nodes that works for the shooter.

A nice video

It is amazing

Enjoyed the video. I’ve struggled getting the OBT software to match any physical results I’m measuring to the point where I’ve completely stopped using it. There seems to be too many variables for it to work regularly.

Great job going through the data! Really thorough and appreciate that you tried a bunch of different methods. Quick question - since you shot this at 50yds, your 0.48 inch group is actually pretty close to 1 MOA, right? Because 1 MOA is 1 inch at 100 yards and 0.5 inches at 50yds. Either way, solid group for a gas gun and you may be able to tighten it up by adjusting the seating depth! I've been going through the same challenges you have with some .308 load development. Tried a bunch of different methods and landed on a decent powder load, then had to mess with seating depth testing.

Awesome video!. I am new to reloading and was curios once you found your charge weight how did bullet seating depth impact it. Is seating depth the final tuning method or does it completely change the harmonics and results of these tests?

When i shoot 2 shot groups of 5 groups with the same horizontal line. i use desk calanders from wallmart with a 3/4" dot from office section at each line intersection. I am handicapped with no chrno. i would rather spend the money on bullets,

A grain off max load, bullet seating depth to adjust group size. Send it..

Wait a minute, at 17:40 you say your group was .384 inch/moa, but if you're shooting at 50 yards then there's no way that .384 inch equals .384 moa. Maybe at 100 yds, but not 50.

Eat a lot of proteins??