-
Having trouble using the site?
Contact support
New 6mm Advanced Rifle Cartridge
- Thread starter Gtscotty
- Start date
I'm building up a all Aero Precision with Larue trigger, Luth furniture, Rainer Ultra Match 22" with VG6 and BCM guard this weekend. Hopefully get out next week and test it with the 180 rounds of Hornaday Match I got. Then have to start working on hand loads.
FYI, 22" Shaw barrel, Hornady factory 108 ELDM, 1st 120 rounds down the tube for barrel break-in. I'm seeing similar MV's in handloads with CFE223 and Lever with 109 Bergers and 110 ATips. Some of the dips, like around shot 70 and around shot 90 were cold fronts blowing through, so for sure I'm seeing temperature sensitivity. Around shot #110, I got a .65MOA five shot group at 700 yards so I'm fairly happy with the Shaw barrel. I think it's a better barrel than I am a shooter.
Nice!
I shoot the 109’s over LVR out of my 22” Rock Creek barrel. What LVR load are you shooting to get the 2740-60 speeds?
I am getting around 2750 with 29.6 of LVR when the temps are over 80. Also curious about your jump with the 109’s.
24" CLE Bartlein finally in and buttoned up...I'm running short on scope bases so this unimount will work for now. Also have a 20" Proof so be interesting to see velocity gains side by side.
I never had good luck with either in my rifle. I have a 18" Proof barrel that was made out of a shot out RPR barrel. I had no fire cracking other than the throat so I had my smith cut it off and make me an ARC barrel. Mine is also a 1-8 twist. I had really good results with Varget but since I run a can all the time I just got to much pressure and it was hard on my brass. I had better luck with LVR and since you want temp insensitive powder look at IMR8208. It may be because of my twist but mine just hammers with 87 to 90gr Bergers and LVR.....
well fingers crossed I can get one of em to run well. I know H4895 worked really well with the 6mmAR for Mr Whitley so I’m hopefully I can get good results with it. My Grendel loves benchmark and 107s so I might just have to play around with it and see once I get the ARC all together.
Got out today and shot the ELD-X and Police TAP loads at 100 yards through my 18” and 12” guns. I did 2 five shot groups with each rifle/ammo combination.
The 12 inch gun is a Monster barrel with a Trijicon 1-8 on it. The reticle is not really conducive to precision work but gets the job done. This gun had about 20 rounds through it at the start of the session.
The 18 inch gun is an Odin Works barrel with a NightForce 2.5-20 on it. It had 95 rounds down the barrel at the start of the session.
ELD-X
12” Monster Barrel- 2 five shot groups
1- 2343 fps 1.34moa
2- 2344 fps. 2.52moa
18” Odin Works Barrel- 2 five shot groups
1- 2650 fps .88moa
2- 2644 fps. .53moa
Police TAP
12” Monster Barrel- 2 five shot groups
1- 2347 fps wtf, I forgot to measure this but it was about like the second one
2- 2335 fps 2.5moa
18” Odin Works Barrel- 2 five shot groups
1- 2608 fps. 1.42moa
2- Chrono error 1.75moa
The TAP was not stellar, but then typical police ‘duty’ rifle ammo tends to focus on terminal ballistics and not super precision. Still, 1.56moa out of a police duty round will still get the job done at any reasonable police engagement distance. Last I knew, the average police sniper shot is about 75 yards.
The ELD-X loads look very nice out of my 18” gun, grouping on par with the ELD-M loads. I think I might have to try and arrange a trip out west to hunt antelope!
The 12 inch gun is a Monster barrel with a Trijicon 1-8 on it. The reticle is not really conducive to precision work but gets the job done. This gun had about 20 rounds through it at the start of the session.
The 18 inch gun is an Odin Works barrel with a NightForce 2.5-20 on it. It had 95 rounds down the barrel at the start of the session.
ELD-X
12” Monster Barrel- 2 five shot groups
1- 2343 fps 1.34moa
2- 2344 fps. 2.52moa
18” Odin Works Barrel- 2 five shot groups
1- 2650 fps .88moa
2- 2644 fps. .53moa
Police TAP
12” Monster Barrel- 2 five shot groups
1- 2347 fps wtf, I forgot to measure this but it was about like the second one
2- 2335 fps 2.5moa
18” Odin Works Barrel- 2 five shot groups
1- 2608 fps. 1.42moa
2- Chrono error 1.75moa
The TAP was not stellar, but then typical police ‘duty’ rifle ammo tends to focus on terminal ballistics and not super precision. Still, 1.56moa out of a police duty round will still get the job done at any reasonable police engagement distance. Last I knew, the average police sniper shot is about 75 yards.
The ELD-X loads look very nice out of my 18” gun, grouping on par with the ELD-M loads. I think I might have to try and arrange a trip out west to hunt antelope!
Well I had 6 rounds left over from load development for the 20" Proof..that one is a whole other story in itself. They were 75gr vmax at 32.3 gr LVR, Starline 6.5 and rem 7.5. I figured yesterday I would use them to get a half ass zero for full load development this weekend coming up. That and I also whipped up 3 Tubb tms rounds per my usual half ass barrel break in procedure.
Setup a fairly large target at 100
First shot, a bit left, elevation looked good, bolt locked back and the +1 gas system felt smooth with a standard a2 buffer and jp polished rifle length spring.
Made adjustment and moved on to a different 1" pasty and then shot another, about a .1 low and still 'bout .1 left, .2 would of prob been better. Made another adjustment and shot the remaining 4. Very, very pleased.
I chronyed the tubb tms rounds for s&g they were loaded per hornady gas gun starting load for the 105 bthp at 25.2gr lvr. Tubb uses 107gr smk.
I plan on loading around the 90-95gr for these, and a few 100 105 amax I have left over from my 6br days. Have a crap load of 105 berger hybrids but I'm loading those exclusively for the 6x47L. Looking forward to this weekend, so on tap is 90gr eldx. 90gr berger mt and some 105 amax, with LVR, Cfe and maybe pp2000mr, have loads of Varget and h4350 but starting with those powders for now I guess.
From my personal xperience at the moment, the CLE Barty is leaps and bounds above my particular Proof bbl, but there is still more yet to be discovered.
I took a look at the 22 grendel a while back, at the time iit, seemed like some leg work getting a barrel I favored, messing around with bushings so on so forth...
I dunno, I just wasn't seeing too many options for it at the time and turned out never really looked into it again.
6mm is as small as I like to go for medium game (at the upper end of the bullet weight options, 100gr+), and is in the Goldilocks zone for recoil vs. energy vs. wind drift vs. BC vs. SD vs. velocity.
For me it’s about factory support with dies and brass and such and that for competition it’s something more practical.
All of the above, I like my Grendel, and prefer an AR-15 to AR-10 size platform, but wanted to be able to shoot heavy for caliber bullets faster than the Grendel can manage.
6mm Grendel/AR/Turbo/Fat Rat/whatever else had been around quite a while, but it was the standardization into the 6mm ARC, supported by Hornady that appealed to me. Standardization and backing by Hornady brings factory cases, good factory ammo, factory barrels and rifles, lots of pressure tested load data, etc. I'm not necessarily looking for the absolute Apex of external ballistic performance, I just want excellent performance that I can easily (read: Lazily) live with, and the ARC provides that.
As others have mentioned, the fact that 6mm is comfortably enough for deer, and there are tons of good bullet options for that use doesn't hurt. I do wish Nosler would bring out something like a 108gr ABLR in the caliber, that would make a nice addition to the hunting bullet catalog for a lot of modern 6mms including the ARC.
6mm Grendel/AR/Turbo/Fat Rat/whatever else had been around quite a while, but it was the standardization into the 6mm ARC, supported by Hornady that appealed to me. Standardization and backing by Hornady brings factory cases, good factory ammo, factory barrels and rifles, lots of pressure tested load data, etc. I'm not necessarily looking for the absolute Apex of external ballistic performance, I just want excellent performance that I can easily (read: Lazily) live with, and the ARC provides that.
As others have mentioned, the fact that 6mm is comfortably enough for deer, and there are tons of good bullet options for that use doesn't hurt. I do wish Nosler would bring out something like a 108gr ABLR in the caliber, that would make a nice addition to the hunting bullet catalog for a lot of modern 6mms including the ARC.
My two main reasons:
1. I can (maybe I should say "could") order a case of Hornady ammo for it whenever and shoot. As of late ammo has been in stock plenty, though, and I have around 600rds of factory ammo to shoot through.
2. I was comfortable with it as a deer/antelope killer.
Looking at the round I decided this would be my perfect "do it all" caliber out of an AR for eastern Nebraska - mostly coyotes and whitetail. Also seemed like a cheaper way to get myself in to the PRS game, if I chose to go that route.
It's muddy water between .22 and 6mm. Recoil, trajectory, splash, terminal, barrel life... Pros and cons both ways. I'm on the fence about running .22's for PRS style shooting just from my experience it seems like the guys shooting .22-250, .22 creed, etc. have more "No call!" misses, but I don't have hard stats on that. I certainly noticed it coming from 6.5 Creedmoor to 6 Creedmoor and then 6 ARC. I'd feel okay shooting deer with a .22 under certain circumstances, but feel a lot better about it with a 6mm. .22 seems like more of a coyote and P-dog slayer to me.
My 6 ARC bolt gun barrel is up to ~3500 rounds now (almost all Varget 60-62ksi loads). It's holding the same velocity as when I developed the load 400 rounds in, and accuracy is still pretty solid (1.33" for 20 shots at 200yd a week or so ago). I'd be curious to see how long a .22 version lasted, but I'd bet a guy gets at least 3k out of it regardless.
Unrelated note: I took a Hornady 6 ARC case and did a load/fire/anneal/size/trim cycle test on it. With AMP setting 47 each firing, and a FL size (.001-.0015" bump) I got 20 loads out of it with 28gr of Varget and a 108 ELD-M (max book load, basically). At 18 you could see a thin spot forming near the head. At 19 I would have normally thrown it away but did 1 more for science. At 20 firings the thin spot ALMOST poked through, 21 would've been a case head separation. Primer pocket felt easier to seat at 15-16, but still plenty functionally tight. This was in a bolt gun-- I need to repeat it in a gasser to see how things compare. I'm sure it'll depend a lot on gas settings, though. Anyway, can bank on 15-16+ from a bolt gun for certain if you don't abuse them.
My 6 ARC bolt gun barrel is up to ~3500 rounds now (almost all Varget 60-62ksi loads). It's holding the same velocity as when I developed the load 400 rounds in, and accuracy is still pretty solid (1.33" for 20 shots at 200yd a week or so ago). I'd be curious to see how long a .22 version lasted, but I'd bet a guy gets at least 3k out of it regardless.
Unrelated note: I took a Hornady 6 ARC case and did a load/fire/anneal/size/trim cycle test on it. With AMP setting 47 each firing, and a FL size (.001-.0015" bump) I got 20 loads out of it with 28gr of Varget and a 108 ELD-M (max book load, basically). At 18 you could see a thin spot forming near the head. At 19 I would have normally thrown it away but did 1 more for science. At 20 firings the thin spot ALMOST poked through, 21 would've been a case head separation. Primer pocket felt easier to seat at 15-16, but still plenty functionally tight. This was in a bolt gun-- I need to repeat it in a gasser to see how things compare. I'm sure it'll depend a lot on gas settings, though. Anyway, can bank on 15-16+ from a bolt gun for certain if you don't abuse them.
Colorado wont let you poke holes in big game with less than .224. I’m thinking a howa mini action in 6 arc might be just the ticket for an ultralite hunting rifle for us poors and our kids. Not that the grendel is a slouch …..
Because it's currently the easy button for a Grendel based gas gun. I wanted one to mess around with, but wasn't 100% sure I'd like the rifle, and it was relatively easy to get a Proof barrel and inexpensive Hornady dies. And because you can't hunt deer with anything smaller than a 6mm Virginia, where I am currently.
I knew with the hype it would be easy to unload if I ended up not liking it. Turns out I do, and I'm considering building a 24" gasser to shoot in the gas gun division for next year.
But it's a gas gun only thing for me. I have no desire to use this cartridge in my bolt guns. I have a 6mm Dasher that I love, and plan on a BR soon. Both are superior to the ARC, and I really don't get the attraction of using this cartridge in a bolt gun, unless you just don't realize that the BR exists or don't understand what it's capable of. With current ammo prices, even the factory ammo availability argument falls apart, as Hornady ARC ammo is often selling for nearly the same price as Lapua factory loaded 6mm BR.
Last edited:
Could I trouble you all with a couple questions after watching the video…
He speaks of using 6.8spc magazines. I thought we were all using the 6.5 Grendel mags. Are 6.8spc mags basically the same as 6.5 Grendel mags? I thought they were different animals.
The barrel he had was cut for a shorter jump (.080 v. .120 inch) to the threads. Why does the jump matter for longer barrels but not for shorter barrels.
Thanks ahead of time for the learnin’.
He speaks of using 6.8spc magazines. I thought we were all using the 6.5 Grendel mags. Are 6.8spc mags basically the same as 6.5 Grendel mags? I thought they were different animals.
The barrel he had was cut for a shorter jump (.080 v. .120 inch) to the threads. Why does the jump matter for longer barrels but not for shorter barrels.
Thanks ahead of time for the learnin’.
6.8 SPC case body diameter is something like .421", the ARC/Grendel is .445". Often times they're close enough that the magazines for one will work for the other. 6.5 Grendel magazines are probably a better bet, but the 6.8's may end up working fine.
Bullet jump is independent of barrel length. There may be some correlation to use-case but there's no physical/accuracy correlation between barrel length and jump. I haven't watched the video to get at what he was referencing specifically, but usually when people shorten the free bore (less jump) on a chamber reamer design, it's to run bullets with longer ogives. You're stuck at 2.250" or thereabouts for cartridge overall length, so by having less free bore, you can run bullets with longer ogives at the same overall length and 'bring the lands closer to the bullet' by shortening the free bore. Folks have ideas about what the ideal jump distance should be and they try to make a specific bullet fit that jump window at a specific magazine length. Hopefully that's clear as mud.
Yeah, I have no idea why shorter jump would be necessary on long barrels but not on short... maybe the longer barrel is whipping around more and hence showing less precision... and a possible way to 'get back' the precision is to mess with jump.
I wouldn't worry about jump and barrel length. Too many other important things to worry about and most of them are related to the human, not the rifle.
Barrel length and jump, that’s a good one. Funny my 18” and 10.5” 6ARC both like the same, and in fact have a nice little node where jump can change due to erosion and still shoot quite well. I’ve even loaded on a progressive with the associated variance for giggles and it didn’t make much difference (autotrickler thrown charges, though).
I've no idea why he was using 6.8 mags, as ASC also makes a 6mm ARC specific magazine now.
As for jump and barrel length, my understanding was that Ray was talking about 2 different aspects of the barrel. The shorter jump to the lands (not threads) was to try to get the barrel to group better with Factory Hornady 108 ELD ammo, and the longer length was to get the bullets up to or above the 2700 fps mark that he references several times. I think he also mentioned that they had found some of the shorter rifles had difficulty shooting the 108s into small groups unless they were pushing them around 2600 or faster.
But I don't think he meant to imply that the shorter freebore was related directly to barrel length.
The way I watched that was that he is looking for TWO independent parameters.
1. Accuracy of 1MOA or better
and
2. A certain velocity range
What he said was that in shorter barrels where velocities were also slower the groups tended to be much better. Why that might be so I don't know. None the less he was saying that at slower velocities various guns would group a lot better, but that slower velocity is not good for competition shooting.
The whole philosophy behind Eagle Eye's criticism of the 6ARC was that in gas guns he said they won't hold groups with factory ammo (apparently just on longer barrels) so he set out to basically 'improve' the performance (in way of grouping) while also NOT giving up velocities. Basically he's trying to sell custom barrels with different chamber dimensions, meaning the lands will be brought in closer while using magazine length ammo.
[On a side note of conversation, there is definitely merit to trying to custom make a barrel for a given bullet type and barrel length but that is a topic for another day. In other words I am not at all throwing out their hypothesis (yet)]
For whatever reason they tend to think that the 'bad groups' are caused by what they deem as 'excessive jump' which may or may not have a lot of merit to it.
What they are saying (to me) is right now it's a matter of choosing A or B. Either get your velocity (A) or get your groups (B). They are working under the premise that it's either one or the other but he's trying to figure out how to get both A and B.
Instead of trying to rob Peter (velocity) to pay Paul (group size) how do you satisfy both without sacrificing either.
***While I don't know for sure, and I am definitely no expert I have a lot of mixed feelings about their stuff they are putting out. Personally I don't have enough data to confirm one way or another. On one hand there is definitely merit to bringing the lands closer to the bullet (via custom barrels). If for example you know X bullet likes a certain jump you can build a rifle around that. That's definitely a possibility that needs exploring. On the other hand I am not entirely convinced that every single longer barrel out there produces bad groups, even without giving up velocity.
Pretty much this whole concept was/is a product of Eagle Eye Shooting's mind. He's working around the basis that 'longer AR barrels all suck and cannot hold a sub minute group', whereas I myself am not entire convinced yet that this problem even exists.
I am wondering if anyone has looked at Hodgon's reloading site anytime recently. Looks like Accurate 2520 is giving very respectable velocities (according to their load data).
Velocities match or exceed CFE223 and Lever in the listed 107 and 110 grain categories.
Wondering if anyone here has tested it?
Velocities match or exceed CFE223 and Lever in the listed 107 and 110 grain categories.
Wondering if anyone here has tested it?
Looks like a bit of disagreement with the data.
I thought it was pretty informative video. For my plinker purposes I just load to mag len and pump em out at slower velocities. I have VLDs for the speeders/Long Range that group well, but they are still only around 2650 which are also mag len. I may try working some brass to up the speed on next round of loads.
I see the point of the shorter leade, but how long will that last before it gets burned out? I like to see guys trying new things. That lower looks legit with the big barrel nut.
I see the point of the shorter leade, but how long will that last before it gets burned out? I like to see guys trying new things. That lower looks legit with the big barrel nut.
It’s easier to sell a fix if you create the perception of a problem to begin with.
But, it’s on YouTube, so it must be true.
Exactly. That's been my thoughts on the subject all along.
I am not at all saying things can't be improved. Building a barrel for a specific bullet definitely could be a thing but overall I think this is a way to sell custom barrels with custom chambers. That's how it came across to me from the get go.
I have been doing some extremely slow testing. Part of it is supplies are limited because I can't get an assortment of bullets like I normally do. I started out shooting 112 grain match burners but the other day I found a single box of Hornady 108 grain bullets.
Today this was my very first load with no seating depth or charge weight tests done yet.
Five shot group was shot off of a bipod and rear bag.
The outside edges measured .517". Center to center that makes it .27". Since one MOA is 1.08", that makes this group exactly .25 MOA.
Straight out of the gate this ain't half bad for a semi automatic AR15 that people on the internet tell me won't shoot groups.
Today this was my very first load with no seating depth or charge weight tests done yet.
Five shot group was shot off of a bipod and rear bag.
The outside edges measured .517". Center to center that makes it .27". Since one MOA is 1.08", that makes this group exactly .25 MOA.
Straight out of the gate this ain't half bad for a semi automatic AR15 that people on the internet tell me won't shoot groups.
Attachments
Ah come on, man. Here I've been holding out for the past year or so planning to put together an 18" 6 ARC barrel for my current favorite "do everything" LMT MLR to make it even better. And then you post this and it reminds me that I have a lower sitting around doing nothing and "hey wait, why not build something similar?" Welp, time to start looking for uppers with long barrels...
Yeah, I agree. I didn't post up the vid because I thought the guy is right, or that a custom chamber is needed. In fact quite the opposite. But I did think it was interesting PoV and glad it was discussed here.
Sorry for the slow reply. I've been busier than a hooker at the DNC.
For LVR:
109 Berger: 29 gr
110 ATip: 29.1 gr
For CFE:
109 Berger: 30 gr
110 ATip: 29.5 gr
That was a ladder test. I'll do an OCW soon and that should give better stats.
So far I've just been running at the same BTO I measured for Hornady 108 ELDMs and have not worked on jump yet.
Sounds pretty typical for TAP groups.
The ELD-X is a bit pricey, but the Black and ELD-M aren’t bad at 25/box.
6mm arc for Sale | Vance Outdoors
Online shopping from a great selection of discounted 6mm arc at Vance Outdoors.
Same thoughts on the TAP, definitely not anywhere near as precise. My 100yd five shot groups were 1.42 and 1.75 with the TAP.
Same day, same rifle, my ELD-X groups were .88 and .53.
I’ve found that the police duty loads always seem to be more oriented toward what happens when they hit, and less oriented on shooting minute groups.
My 5.56 results are similar, I can shoot sub moa all day with factory match grade loads (MK262 and BH 40gr and 55 gr VMax), but the Federal LE223T3 and TAP loads are 1.5 to 2 moa loads.
Got chrono data on my 105 VLD rounds at 600 yds to true my BC's because who really trusts Litz? I hid it behid the 4x4 sighing plate. I also got some incoming POV video with DSLR and will be trying to get bullet trace. The Bog took some hits on that though. Dang thing ain't even bullet proof...
Here's the vid: Incoming Bullet Trace Attempt #1 - DSLR target POV 600yds
Ran the Poverty pony out to a K today. Besides a couple feeding issues that I suspect are mag related (20 rnd ACS), it did great. The wind was mild and the LR pavillion was empty. Also shot the IveyTron on top of the new Bergara LRP in 300PRC , but that's another thread.
Next up for Arc is more neck turning and mag testing.
Here's the vid: Incoming Bullet Trace Attempt #1 - DSLR target POV 600yds
Ran the Poverty pony out to a K today. Besides a couple feeding issues that I suspect are mag related (20 rnd ACS), it did great. The wind was mild and the LR pavillion was empty. Also shot the IveyTron on top of the new Bergara LRP in 300PRC , but that's another thread.
Next up for Arc is more neck turning and mag testing.
Last edited:
got some chrono on my sons 20 in bartlein yesterday shooting hornady black. 2747 avg MV. sd 9.0 es 25. we took it out to 900 after we trued the MV on the kestrel . joker is a hammer.
Thats pretty fast for a 20, wow! When I shot the factory Black I only got 2688 avg with an SD of 12 and ES of 32 at 90*! How many down the pipe so far? I'm hoping I get some good performance when my 24" CLE barrel finally gets here. My 20" monster gets around 2690-2720 with 29.4gr of LVR/105 BTHP and a suppressor, but it's definitely at the edge and full mag length to get that.
Edit to add...I got some stuff mixed up there. That load was pretty sane, I didn't see till after I posted in my book that those were 2x brass and the marks were from initial load work ups in the 30gr ballpark. No Chrono data at the time. They were cleaner burning and accurate, but rough on stuff...lol
Edit to add...I got some stuff mixed up there. That load was pretty sane, I didn't see till after I posted in my book that those were 2x brass and the marks were from initial load work ups in the 30gr ballpark. No Chrono data at the time. They were cleaner burning and accurate, but rough on stuff...lol
Last edited:
First ones out of it. it ought to speed up this weekend at the match. Got a two day match at arena in blakely,ga he is running it at
I didn't pony up for the Bartlein or Kreiger yet, Criterion is enough for now. Currently want to try out PRS and see if it's my thing, was shooting USPSA but lost my motivation and this is my feeler rifle. Hopefully it don't speed up too much on him(not sure how far out they go there/if it will matter)
Snuck out after work for an hour or so to garner a quick range report with 90 eld x and 30.9gr lvr with 24" cle Barty.
Had 4 different batches made up one with cci 450 the other with rem 7.5. Two batches of each neck sized with 241 and 240 mandrel. All groups of 4 shots were sub moa the cci 450 averaged around .75 with 240 mandrel and a bit smaller with 241, but sd was meh with 5 shots in the double digits. 3025fps avg.
The 7.5 primed loads were outstanding, avg .5 moa with the best numbers, sd of 4 fps over 5 shots avg 3038fps. With the best group using .241 mandrel under .5 Again groups with 240 mandrel opened up just a wee bit. I can say that there is a consistent difference between the two with an improvement using the 7.5 and .241 mandrel.
This all with 3 times fired freshly annealed Starline brass allowing barrel to cool between groups.
Have 90gr Berger mt and 105 next up for testing.
Had 4 different batches made up one with cci 450 the other with rem 7.5. Two batches of each neck sized with 241 and 240 mandrel. All groups of 4 shots were sub moa the cci 450 averaged around .75 with 240 mandrel and a bit smaller with 241, but sd was meh with 5 shots in the double digits. 3025fps avg.
The 7.5 primed loads were outstanding, avg .5 moa with the best numbers, sd of 4 fps over 5 shots avg 3038fps. With the best group using .241 mandrel under .5 Again groups with 240 mandrel opened up just a wee bit. I can say that there is a consistent difference between the two with an improvement using the 7.5 and .241 mandrel.
This all with 3 times fired freshly annealed Starline brass allowing barrel to cool between groups.
Have 90gr Berger mt and 105 next up for testing.
So the .241 mandrel would leave just a tad less neck tension is that correct? I'm looking for ways to reduce neck tension on a few specialty match rounds. I already mandrel size but just got into neck turning and I think that will help a bit.
Was at the local enabler yesterday. they have some Berger 109 Elite Hunters that I might try. My coyote hunting buddy has been putting me off to haul junk cars for his friends so that might be out this season...
Great shooting! good info.
Was at the local enabler yesterday. they have some Berger 109 Elite Hunters that I might try. My coyote hunting buddy has been putting me off to haul junk cars for his friends so that might be out this season...
Great shooting! good info.
It depends on your brass specifically. You may have more or less springback when sized and when running the mandrel. In general, yes it would provide less but it depends.
Similar threads
