6mm ARC - Still just getting started 

I don’t always get excited about a new cartridge, but when I do it’s usually Johnny’s fault.

After a few hours of JRB videos watched i just realised this: He is the guy (to learn from) who turns the camera off when everything is fine and turns it back on to show the problems (if any should occur). This is perhaps the essence of the channel to gather useful info from.

I’ve been waiting impatiently for more JRB 6mm ARC vids. Let’s get an ARC series like the Grendel series!! One of these days my back ordered barrel will actually ship. Until then, this is the next best thing. Keep up the great work JRB!

Gotta love this channel. "...maybe I'll blow my face off! We're here to have fun!" Never a dull moment with a JRB video.

Really glad to see you working and sharing about all things 243ARC.

Yea im so glad that he went with this round as I loved my 6x45 ar and I was really looking forward to seeing how far he can push it.

YES... love seeing a new video. Great stuff as usual mate.

You do a GREAT job of balancing moving the video along with good detail.

Happy Memorial Day 2022. Went target shooting with friends today, with my brand new Grendel Hunter 22" AR-15 in 6mm ARC. After a couple of warm ups, It shot a .63", 5 round, ragged hole in my target @100yds. I am super happy with the performance of this, new to me, caliber. Keep pumping out the 6mm ARC videos, Shawn! I wanna see what you're doing with 6mm ARC!!

Excellent video! keep up the good work

My barrel finally arrived and I was able to put together my 6mm ARC upper last week and I’ve started to order components. I’m excited for more videos and to get playing with this cartridge myself.

Oh yeah. A spicy fresh Johnny's video to brighten my Monday.

I have been missing these videos!! Love the grendel!!

Keep it up!

Good video Johnny!

My Proof barrel will be here in 2 days. I have dreamed about this for over 2 years. I bought a 6.5 Grendel JP enhanced bolt 2 years ago out of excitement and I am finally doing it. Thanks for the great info because it helps me to know where to start. Mountains Mullets Merica posted a video shooting 1,200 yards with a 14.5 6 arc and it’s was a faxon barrel so who knows with a good barrel what is possible.

Hello Johnny keep up the great work👍

I'm waiting on my 6 arc barrel. very excited!

Lotsa good going on here. Even 100 STGK aren't a failure. 8208 is a super consistent powder. I like it in 223 & 308. Great detail & demonstration for our help.

Great video very informative

Johnny, you can put a little IMPERIAL sizing wax on the bullet to overcome that slight tightness when using that resized modified case shown in the video. Just apply to the bearing surface of the bullet.

I really like the new target info layout

Great video's! I enjoyed the Valkyrie video's and the challenge's of that cartridge. I love a challenge and I'm working on that cartridge now. I have to say I much prefer the older cardboard and orange dot target a whole lot better than the new tech board. It's just nice to see the real holes made by bullets rather than a simulation.

I've got < 1" using Johnnys load with 105Bergers and ppVarmit @ 2500. I only had 16cases that I scrounged. RCBS standard die set with lee quicktrim 6.5 Grendle trim die(filed down 40thou and removed the champher blades). CMMG 20" with SA adj gas block. Started low and worked up. More brass on the way!

Lol “poopie doopie” I just got some 90gr sierras for my 243. This video makes me excited to finish them up soon! Thanks!!

Boom baby got crack (reloading)fix! Thanks for the upload Johnny. Miss the live chat because I was working! I’ll go back an watch it tonight. On a side note, it seems everywhere I go there are 6mm bullets on the shelf and usually a good selection.

For expanding the necks on modified cases I use a collet bullet puller after the expander mandrel and a bullet and just work it up and down a few times and it works nice

I am (un)patiently waiting for small rifle primers to come in stock anywhere - would love to see a video in the future talking about alternative uses for CFE-BLK

Best reloading channel

Wohoooooo another video

Johnny..... you’re making my 2021 coyote rifle decision VERY FRIGGIN DIFFICULT with this series.... I’m anxiously awaiting your lighter weight bullet testing for the 6mm ARC.

52:45 I posted this before on some of your previous videos. I call those groups "splittings". They ALWAYS happen after you go faster than the accuracy node for the load (with loads that will group and these are doing well). They are a huge AH-HAH if you see them. The 28.8 load is the lower accuracy node and the 30.0 gr was your upper accuracy node. Looks like the 30 gr load of CFE223 is the tits! Load em up, solidify your data, and then send em out to 1400 yds.

Saw a dead simple method of measuring max lenght.. Take a case, fired or expanded so it takes a new bullet with tiny friction, then put loctite or glue in the neck and insert the bullet, chamber it and wait. afterwards you got a perfecly seated bullet and it wont move during extraction. Case/bullet can be cleaned and re-used. I save a case+bullet with max lenght for all bullets, its just a couple cases for future reference.

I love your channel and your my go to source to see that the 6mm arc is the cartridge that should replace the 223. I've tried many others and haven't had much luck. looks like I will be buying a 6mm arc barrel.

Run modified case thru grendel die to resize the base without the stem .... Size the base without touching the neck ... Would check chamber measurement to see if the shoulder would get touched

Those Hornady sizing dies used to come with a smooth shank on the decapping rod. Seemed like you had to torque them to an ungodly number to get it to stay put. Then all of a sudden they started with those semi-threaded rods that held better with less torque.

Hey Johnny, when you are checking for contact with the lands in your reloads, colour the projectile with a Sharpie, which will show even the lightest contact where the marker gets scratched off the projectile. There is also a fair bit of difference between lightly touching the lands and feeling engagement with the lands.

I have a Lee Classic turret press. The ram is hollow, so all the used primers fall through the center of the large diameter ram and down into the rubber tube. The primers crud never comes between the ram and the bore that it slides through, doesn't stick to the lube, etc... and can empty the tube right into the trash. I use it for all my decapping after having a brand new Hornady develop a ton of slop in just a year and a half. I cant believe Lee took a step backward and allows the primers to pop out the side of the ram before going down the tube. If I was to design a press I would definitely use a large diameter hollow ram for the primers to fall. It's the number one wear point on any press. I got a "grandpa special" RCBS II at an estate sale in brand new condition. Since then I've never deprimed a single case on it and it has not developed any movement whether at the top or bottom of the ram stroke. If I ever work in a machine shop again, I'd love to build my own beefy press using a hollow ram for the primers to fall through

I have that same press, it works good

Great video, Johny. I’m tempted to try those tipped Sierra Bullets in my 243. I have just purchased a six arc barrel, waiting on my receiver 99 gr. is as heavy as I would want to shoot. I have an 18 inch 7 1/2 twist. barrel. I’m thinking about just staying lite on my bullet weight. I will stay tuned for more of your load work up on your 6 ARC. 👍

Lever evolution is a great powder for high velocity heavier 105-108 match bullets.

Shot marker velocities are definitely worthwhile. At our club I can shoot on 10 different targets and get slightly different velocities on each one. One is 150FPS off. Having said that, it's still good to know what your down range SD/ES is. Because that's what's important. Slight variations in bullet weight/shape aren't going to show up at 11 yards where the labradar reads, but definitely show up at 500-1000 where we shoot.

that double group has me intrigued. also would like to see groups with higher than 30.0 grains charge just to see how they stay together or spread.

I've been gathering all the goodies for my 6arc. I'm liking the 90gr TGK . I want a coyote round!

Did some loading with the 103 gr eldx this weekend, I have a faxon 18” 1in8 twist barrel with a faxon Grendel bolt. Using lever revolution at 2.260” coal and Remington 7 1/2 primers I worked up to 29.6gr, was not totally satisfied with groups and velocity so I shot groups from 29.5 to 29.8 grains, saw pressure signs at 29.7 and 29.8 flattened primers quite a bit. But the 29.8gr load shot 2650 FPS. Way too hot but now I know. This is a hunting load so only a few shots a year in cool to cold weather so I will be going with the 29.6 gr load, need to tweak it for accuracy and velocity consistency but I need to try cfe223 as well so many that will be better.

Possible video idea would be to compare the lab radar and target velocity to see if the manufacturers claimed BCs are accurate because the 108 eld is a bit slower than it should be at the target by my calculations.

Aloha! Always enjoy your videos. Thank you and a bit surprised your not at at least 500,000 subscribers.

Great video Johnny. Can't wait to see more on this 6mm arc. Still try figer place for this when 243win dose same thing . Only difference 6mm arc fit into a ar15 vs ar10 platform.

The Sinclair OAL tool uses the bullets and brass independent of each other to get a measurement so you don't have to try and expand the necks. Plus you don't need to make special cases for each measurement. Just use a fireformed or sized case.

Impact sports did a video about getting base to ojive. He added a small drop of locktight on the inside of the neck of the case. He added a bullet and slowly put it in the chamber. Add the bolt and leave for a little. Then slowly pull the round out with the bolt. It holds the bullet in place. Use only a little bit of blue locktight

My 6.5 Grendel was my favorite AR15 round..until this 6mm ARC came about.It is highly accurate

I think I'm gonna have to look into the 6 ARC.

There is a difference between touching the lands and jamming the lands. With the Hornady your lightly touching. The loaded round is jamming the lands.

its common to open the neck a bit with a mandrel or by seating a bullet, and then sand the inside a hair to get that last bit to allow the bullet to slide in and out smoothly.

Knipex parallel jaw pliers are less likely to round off faces compared to an adjustable wrench. Worth picking up.

Hey lets see some more 6 arc vids. Here i am am addict to reloading and you havent uploaded a reloading vid in a while. I know the powder flow has subsided but i know you got some!

You can get a appropriate size pin gauge to open the neck back up. They are like $4 on Amazon. Just taper one end. I use these to make my own expander mandrel

Finally one of the first 100

Johnny, love your channel. Just a recommendation, get yourself a wooden dowel rod to knock those bullets out. The dowel rod fits perfectly.

i love Sierras !!!! and so does my 338!!!!! 250gr HPBT

You should resize the body and bump the shoulder back to the dimensions you plan on shooting. I use a die with a bushing and take the bushing out when I resize it so the bullets move in and out freely. You want the shoulder bump with the modified case because you want that case to immolate your final brass your shooting so you get the exact jump on your bullets, the number will change if not. That's why people prefer making a modified case rather than buying one from Hornady. Hope all this helps you out on what your trying to accomplish.

Can’t wait to see your results with the lighter bullets. I’m wanting to try a 6mm arc for predator hunting. Should work good for coyote hunting!

I have had good luck with odin barrels. I have an 18 inch DMR 223 wylde that shoots whatever I throw in it under an inch. It even likes the bobs bulk bullets. No complaints.

Great video as always Johnny! I was curious if you have read up on the new 8.6 Creedmoor at all? Basically the 300 Blackout for the AR10 platform using a cut down and necked up 6.5 Creedmoor case with a .338 Federal bullet, showing optimal barrel lengths around 10-12"

a couple things you can do with that Hornady there's the o-ring size I don't have it with me but you can change the o-ring under that and tighten that up or call Hornady and they'll send you some shims for underneath those lock on the bushings

I shoot the 6mmAR which uses the 6.5 Grendel brass. Functions great.

Was waiting for this👍. Keep hearing that LEVERevolution and CFE223 are the two best powders for this cartridge

I can never get consistent results with that lee you have!

Fired, new or resized brass when measuring jam doesn't matter, but you must measure your base to shoulder and compensate for that difference on your resized brass. Your actually measuring shoulder to jam. Hope that makes sense.

N-540's selling point is increased velocity without a pressure increase. I'm testing it in my Colt M4 to replace N-140 (75gr Hornady BTHP Match). Great results so far.

Mr Johnny wasnt sure if you already knew but RCBS will send out different bullet seating stems for free, via there customer service. Since you own a set RCBS and could take advantage of freebies. I was able to get a hollow point seating die through the same method. Not sure if it would work for your Hornady but would at least give you options.

when checking seating depth you progressively got longer and longer and only relied on feel. I mark up the the bullet with a felt tip or what ever and check then do it to get a visual of it and the feel. Just a thought. As always you give us great insight into problems thanks

Would love to see how they work on a frozen pumpkin

Just do it that ole timer way. Drop a bullet in barrel, measure from muzzle with solid rod, pull bullet, close bolt, measure again. Subtract and COAL done. Solid rod from Ace or Lowes 3 bucks. Trick from Old Man Hornadys Book.

I'm sure that amongst the pile of dies that you have, a suitable seating stem could be located for just about anything!

Alright!

I went to a Sharps 25-45 and it works great on antelope. 3 taken with 3 bullets fired. One shot drops.. 87g @ 2950fps....

I wish more companies would make AR based calibers in bolt action platforms.

Your videos are enough to spook potential reloaders off.

Best group out of my gun was cfe223 with Hornady blemished bullets, go figure.

95 grain Sierra Tipped Match Kings rock in my .243, I bet they would do nicely in the 6mm ARC

I tried the 8208 xbr with the 95 gr SST, and the 90 & 100 gr TGK’s, couldn’t get it to work. I tried 8208xbr, ar-comp, A2520 and Leverevolution. So far the Leverevolution is the sweet spot in my 20” nitrided CMMG 6 ARC barrel. Hope you get better results, good luck. My pet load so far is the 95 gr SST on top of 30.4 grs Leverevolution and CCI 450 primers

H322 used to be the "go to" 6PPC powder... N133 is these days.... N133/H4895 would probably give you want you want in that case. I'd try AR-Comp also

I would recommend Erik cortinas' method of setting up the FL sizing die to bump the shoulder

I’m jealous you’re going shooting in short sleeves. It was 7 degrees the other night up here in Idaho.

I have a 6mm Haze, a little more case capacity than Arc. The 95gr smk runs amazing and the BC is nice

Just a thought, the 3 loads you tested that came in with an S.D. Below 6, ie: 5.XS.D. Retest those same powder weights and vary the seating depths.. I’d bet you find a Sweet Spot for each bullet... MHO...

Needing an update on this.

Take the time and watch The A team precision (it’s on his FB page) method of finding your lands it’s the only way I do it now so much more consistent than the Hornady gauge. If your putting any pressure on the plastic rod in the Hornady gauge you are already in the lands

Sort bullets base to ogive. Use expander mandrel to give 0.002" neck tension. Very well could of made the 29.4gr load not jump around. Cheers

Love all the new tech but seeing it play out i kinda miss the old paper view seeing all the loads as they stack up.

Cfe loves higher pressure

Never seen u try Accurate Arms 2015 in anything Johnny 2015 is quickly becoming my favorite 223, 204 powder. Wonder if it would work in 6 ARC. I’ve found that single base extruded powders give the best accuracy and standard deviations.

I’m curious how your groups would be with “said powder and bullet” if you seasoned or shot more groups with a certain combo before you went for record with it when switching between components.

Love the video. After removing the straw tip from the Hornady lube, remove the Hornady lube from you bench and send it to hell. It can hang out with all the mangled brass that it got stuck in my dies

Good luck hunting! I tagged out 2 in cali with my bow, and 1 in idaho with my .300 rum . When you gonna get a ultra mag ;)

It seems you loaded your most consistent ammo on your Redding T7 !

I think, with 100gr bullet you should start with at least 26.5gr. Excelent video as usal.

Johnny, have you ever thought about getting the shell holders that are setup to vary the offset by .001 per the holder? Redding makes them and they work wonders for getting setback just right. What mags are you using that you can get to 2.300 OAL to fit? Mine will only allow 2.288 and it will start binding.

I would love to see what a person could get out of a bolt gun with the 100 grain TGKs. A 22 inch barrel and a sweetheart powder and maybe you could push 2650 to 2700? If so you've got an adequate deer cartridge at reasonable distances.