Alpha will be good. I have practice OCD brass that is literally on its 24th firing. Annealed with AMP. Still strong. Light loads of Varget between 31.8-33.0 depending on bullet. I shot the brass at a 2 day in Texas and it performed great.
6gt
- Thread starter Dthomas3523
- Start date
Looking at rebarreling my 308 Savage once I burn through all my 308 components and possible either going 6xc of 6gt with a Criterion barrel. Is there any issues running regular small primers (non-magnum) either CCI or Federal with Varget or H4350 in 6gt? I have access to several thousand of either via trades but no magnums.
What dies is everybody using? I am new to this. I looked at Forster full length resizing bushing dies - not made for 6GT. So I am looking at Redding full length resizing bushing dies . . . again, no 6GT.
I have an RCBS Rockchucker press.
If it matters I will be using Alpha brass for now. I wanted to use Berger 109 LRHT, but we'll see if it ever becomes available. They posted something on Facebook showing them running new bullets, but I have not seen them available for sale yet. So I will probably buy another bullet until they are available.
So, dies. What do you use?
I have an RCBS Rockchucker press.
If it matters I will be using Alpha brass for now. I wanted to use Berger 109 LRHT, but we'll see if it ever becomes available. They posted something on Facebook showing them running new bullets, but I have not seen them available for sale yet. So I will probably buy another bullet until they are available.
So, dies. What do you use?
I'm using a RCBS Matchmaster set purchased through GAP along with Hornady brass, Berger 109's. I also had great results with the Berger 108 BTT.
I haven't tested regular small rifle primers in GT - but I did in SRP Creed brass while doing a primer test. CCI 400s and Federal 205s both performed pretty well vs 450 and BR4. They weren't quite as consistent (SD was 1-2 points higher with them), but that's really about all I noticed there. GT is a smaller capacity case, so I wouldn't think they'd do any worse there? These days, beggers can't really be choosers, it seems like - if you can get regular SRPs, give 'em a go.
Ok, Kadams1563, I was looking on Redding's site and Midway and finding nothing in 6GT, then I remembered to look on GA Precision.
Is this what you use?
LOL, again GA Precision, but it does not look like they carry that now.
So Redding and RCBS Matchmaster each get a vote. Thanks, guys.
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Bullet central micron with 266 bushing.
Edit to say I've run matchmaster with success as well.
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I’m using the SAC die with .267 bushing for 6GT & .247 for 22GT.
shortactioncustoms.com
Modular Sizing Die – GT
GT dies with .20 Caliber Bushings will not come with a decapping pin. If using an existing GT die, please reach out to us so we can send you a plug for your die to function properly [email protected]
shortactioncustoms.com
A good place to start is this hornady from GA.
DESCRIPTION
Hornady Custom Grade 6mm GT die set, with Microjust Seating Stem. (non bushing style)
Hornady Item numbers:
- Custom Grade Die set # 041624C
- Microjust Seating Micrometer #044090
- The full length sizer die is cut with a .266" neck diameter - Perfect for about .002" neck tension with the Alpha Munitions or Hornady 6mm GT brass.
I believe RCBS has them in stock.
I’ve used mostlyCCI400’s in my 6GT with no issues using Varget, H4350, and VV555.
Only used about 300 federal ARMatch small primers and don’t see any difference.
No issues here
Alpha brass, CCI 450, 32.3 Varget, 108 Berger:
Anyone running the 105grn Barnes Match Burners I see and yes I looked people have used the 112grns didn't see anything on 105's? Ordered and MPA 6GT for Production Division want to start getting supplies now.
Is it a budget bullet you're seeking? 107smk are just as good as 105hyb, and they're available, and maybe 5-6¢ more than a 105mb.
I have about 2K of the 109Hybrids on backorder at the moment after research not going to see them maybe for a while lol. Was looking at a good substitute I use the 140grn MB in my 6.5CM presently with no issues but I do tip and point them. Just looking to see I found a lot of the 105's in stock at 112grns just looking to see what most folks are running and noticed nobody has the 105's listed after 29 pages lol could be an indicator lol
I have about 2K of the 109Hybrids on backorder at the moment after research not going to see them maybe for a while lol. Was looking at a good substitute I use the 140grn MB in my 6.5CM presently with no issues but I do tip and point them. Just looking to see I found a lot of the 105's in stock at 112grns just looking to see what most folks are running and noticed nobody has the 105's listed after 29 pages lol could be an indicator lol
They (105MBs) might be great, most precision rifle guys are snobs and just skip over them because they're cheaper than the usual suspects (that probably goes for the Match Burners in general).
I tried the 112's because I couldn't get DTACs... and they've shot good enough to where I haven't ordered any more DTACs (yet).
I'd just try 100-200 and see for yourself before ordering 500+, at least that's what I plan on doing one of these days, because there's a chance they're as good as the 112's...
Bought 1k 112s, tried them 2.5 years ago upon release, and hid very mixed results, however there were some known problematic lots, but Barnes would never acknowledge nor exchange bullets. I use them to break in new barrels. The base to ogive and bullet OAL had a variation of 0.011 in 50 measured in a 500ct box. I mean dtacs are 180$/500ct box. I've acquired 7500 in the last 9 months for a few different cartridges. I have had good results with the 145 6.5 version tho.
IDK, I've shot over ~7K of the 112MBs at this point and they've been as good as anything else I've ever shot (mostly ELD-Ms and DTACs, few hundred A-tips). I measured 500 once and all the ogive and weight numbers were as close as anyhting else I've bothered to measure/weigh as well.
With all the reloading dogma/fairy-tale nonsense I've read on this site and others I'm sort of surprised any companies, Barnes or otherwise, would exchange or take any bullets back... I'm not pointing at you, but guys blame components/gear all the time instead of looking in the mirror.
With all the reloading dogma/fairy-tale nonsense I've read on this site and others I'm sort of surprised any companies, Barnes or otherwise, would exchange or take any bullets back... I'm not pointing at you, but guys blame components/gear all the time instead of looking in the mirror.
Sounds like they have done better getting the dimensions consistent. I think the bullet looks good on paper, the bc has been verified g7 305-310 from most I've heard. If you've shot that many and had the much success lot to lot, sounds like they've been good to go. I struggled with them in my first gt. That barrel just may not have liked em.IDK, I've shot over ~7K of the 112MBs at this point and they've been as good as anything else I've ever shot (mostly ELD-Ms and DTACs, few hundred A-tips). I measured 500 once and all the ogive and weight numbers were as close as anyhting else I've bothered to measure/weigh as well.
With all the reloading dogma/fairy-tale nonsense I've read on this site and others I'm sort of surprised any companies, Barnes or otherwise, would exchange or take any bullets back... I'm not pointing at you, but guys blame components/gear all the time instead of looking in the mirror.
Yeah, they may have needed to get their shit together or something... I was one of the snobs who never bothered with them when they were brand new on the scene lol.
Now that I know they're a legit .300+ BC bullet for half of what some of the others' cost, I wish I had bought them all up back when they were even cheaper... IIRC they were like ~$0.20pp before the pandemic...
I have 2 500x boxes of two lot numbers from 2020, they're the ones I've had problems with. You're better off with the new stuff trust me.
Interesting read that popped up in my Facebook feed. Sorry for the length, but those following this thread would probably like to read it (even if he shoots dasher instead of GT).
precisionrifleblog.com
The PRS Champ’s Load Data & Reloading Process – Austin Buschman Shooter Spotlight Part 3
This article is part of a series that is taking a deep dive with 6 of the very best precision rifle...
precisionrifleblog.com
...and hard to argue with someone who cleans the entire (two-day) match @ 176-0. Beyond impressive.Interesting read that popped up in my Facebook feed. Sorry for the length, but those following this thread would probably like to read it (even if he shoots dasher instead of GT).
The PRS Champ’s Load Data & Reloading Process – Austin Buschman Shooter Spotlight Part 3
This article is part of a series that is taking a deep dive with 6 of the very best precision rifle...
I have a feeling that if you ran 109 Bergers at 36.5gr H4350 and jump them 40k, it'd be the same resukts as the PRS load data article. That exact load has shot consistently small in 3 barrels for me. No adjusting the seating die. My last barrel was jumping 40k at beginning and 120k when pulled. I had to add 0.3gr powder to keep velocity at the same 2920 range due to pressure loss from extra jump and barrel wear. But it still shot half moa when pulled at 2300 rounds. I have since switched to dtacs in my latest barrel. With 35.3gr H4350 jumping 20k at 2860fps and it shoots very well. I seemed to get an odd random low impact flyer with 109s maybe 2 of every 100 rounds, 0.3 Mil low or a very consistent waterline. I have not experienced that within the 400 dtacs I've fired.
Interesting read that popped up in my Facebook feed. Sorry for the length, but those following this thread would probably like to read it (even if he shoots dasher instead of GT).
The PRS Champ’s Load Data & Reloading Process – Austin Buschman Shooter Spotlight Part 3
This article is part of a series that is taking a deep dive with 6 of the very best precision rifle...
If you think about it, everything he does (or does not do) jives with what a lot of us are always saying: it doesn't really matter that much if one makes a "good" round versus a "bad" round... it's if one can make the same round over and over again that really matters.
If one makes the same round over and over, same components, same steps/process, same everything, over 10-15 barrels... then one can imagine they'd get pretty good at it.
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Is it a shouldered prefit or a barrel nut? Most smith will cut a shouldered prefit to go gauge +0.002 deeper. This will usually have new alpha brass growing 0.004 upon firing. I had my very first barrel cut to go, and new alpha grew 002 upon firing. If it's a shouldered prefit, and you can't find a gauge, I'd load one case and fire it, check the shoulder measurement and see how much it comes forward. I'd say anything from 002 to 006 growth would be in spec headspace wise. My smith has cut me prefit for tl3, origin, atx, and had the action to fit to my archimedes. Headspace on all of them has been within 0.0005 with my alpha reamer. It's nice, as I do not have to seperate brass between any of them. Hell once fireformed, I can use brass from 3 different lots mixed together with great accuracy and low sd.
Yes, clean chamber and run some patches through to dry everything out. Usually there is a lil cutting oil residue in chamber/barrel after machining. Just a practice I do when a new pipe shows up. If you have new brass, another technique to measure your headspace: using shoulder bump gauge on caliper. Measure the shoulder to case head with caliper. Seat a primer approx 0.010 proud of case head. Strip your bolt down of the firing assembly and ejector(if your bolt has a plunger type). Install case on bolt face and chamber the round, closing bolt. Now remove the case. Measure the shoulder to case head again(primer will still be proud but less as the bolt will have seated it deeper to give headspace) subtract your dimension first measured with no primer, from the new dimension with primer. This is how much positive headspace you have between new brass and your chamber. These are hillbilly ways of doing it, but it works in my experience.
That's a cool little trick to hip pocket for future use. Thanks!
It's barrel nut for a Savage. I don't think I've got any options for that other than gauges.
Agreed, you should use a go gauge with a layer of scotch tape on the face. That'd be go plus 002.
I'll be home in a few days, I could send you a sized piece of brass that's 002 bump in my go plus 002 chamber. You could use it with a layer of scotch tape on the case head.
Have you tried Northland Shooters Supply or GA Precision?
Manson IMO...these are what I have, didn't like the feedback I got from friends about Pacific gauges
mansonreamers.com
6MM GT | Manson Precision Reamers
mansonreamers.com
Have you tried Northland Shooters Supply or GA Precision?
Yup got my barrel from them. Both out of stock.
From a deprimed fired case, it's about 003. I've found a sized case with bumping shoulder 001 from fired is still just slightly touching chamber, not allowing a stripped bolt to drop shut freely on a sized case with handle weight. So I go 003 from fired, which is what I feel, 002 from chamber.
26” proof comp contour
36g H4350
Hornady brass
CCI 450
108 ELDM
1.915 CBTO 30 thou off lands
That’s around 100 rounds down the barrel so I expect it to speed up a bit. Faster than I expected for 2 grains below max.
36g H4350
Hornady brass
CCI 450
108 ELDM
1.915 CBTO 30 thou off lands
That’s around 100 rounds down the barrel so I expect it to speed up a bit. Faster than I expected for 2 grains below max.
38gr will likely be pretty warm. I know 36-36.5 generally gets me 2900-2930 with 108-110gr bullets after 200 rounds of break in. However one lot of powder required 37.2 gr, and a other lot only needed 35.7, I love H4350 but there are noticbale lot to lot variances, I've observed same with Varget and H1000.
115 DTACS
Impact 737
Proof Comp contour @ 26” 1-7”
Foundation Centurion
Manson .120 freebore
6GT Alpha 10x fired
CCI 450
H4350 34.3
115 DTACS
BTO 1.9770
83*
982’ ASL
Hm: 59%
avg: 2801
SD: 4.3
ES: 10
This barrel has 1231 rounds on it mostly from matches . Otherwise I’m not sure if you could get the DTACS to work in a .120 freebore.
10 at 100yds while doing my ladder test.
5 at 501 yds checking velocity. It’s probably going to true out closer to 2810-2815. I’ll check it again at 600 when I go to true the BC.
Impact 737
Proof Comp contour @ 26” 1-7”
Foundation Centurion
Manson .120 freebore
6GT Alpha 10x fired
CCI 450
H4350 34.3
115 DTACS
BTO 1.9770
83*
982’ ASL
Hm: 59%
avg: 2801
SD: 4.3
ES: 10
This barrel has 1231 rounds on it mostly from matches . Otherwise I’m not sure if you could get the DTACS to work in a .120 freebore.
10 at 100yds while doing my ladder test.
5 at 501 yds checking velocity. It’s probably going to true out closer to 2810-2815. I’ll check it again at 600 when I go to true the BC.
I was figuring that would get a little spicy I was surprised to see it go up that high on hogdens website. I think I’ll be right in that 2900 range after the barrel settles in. That’s a bit fast for what I was after but it’s shooting lights out so I figure I’ll leave it alone.
With 108-110 gr bullets, I've found in 5 barrels 2880-2920 is a common node, and then down around 2800-2840. My brothers rifle is running 109 eldm at 2830 with 35.5gr H4350 and it is consistent half to sub half minute out to 1k yards, jumping those 60k I believe in a 170fb chamber.
I'm running next node up at 2870 with dtacs and 35.3gr H4350 in one my barrels, shoots similarly to yours accuracy wise. I've found the ab custom curve in my kestrel at 2880 has lined up perfectly water line to 1k, and had me on full sized upsc targets at 1400y. The dtacs work well, I'm using 0.170fb in that chamber. Jumping anything more than 30k has the bearing starting to get below the neck.
My next barrel will be a .170 freebore as long as I can still get the DTACS. I set this barrel up for 109’s( ELDM’s) but I ran out and GA Precision was out of stock at the time. A guy gave me 50 DTACS to try so I could find out or not if they would work in my gun with the .120 freebore. I think the only reason is because of my erosion after 1200rds. I’m just a tad below the neck shoulder junction with mine , another reason I went with the lower charge. That and it just shot so damn good.
Buy more dtacs now if you can, they're available. I've acquired a other 6k in last few months. I don't want run out if another Sierra manufacturing dry spell occurs.
