• New Site Changes

    View thread We just went through a pretty major site upgrade, so if you see any issues feel free to post them here

6gt

Dthomas3523

Hall Monitor
Staff member
Moderator
Supporter
Hessian
Commercial Supporter
PX Member
Minuteman
  • Jan 31, 2018
    10,057
    13,722
    South Texas
    There’s a couple threads going on that pop back up from time to time. Now that the cartridge is pretty well understood and all the non load questions are asked, time to make sticky for loads and such.

    My current:

    109 berger 0.020 off
    Cci 450
    34.0 Varget
    Hornady Brass
    2950 fps
     

    verdugo60

    Sergeant
    PX Member
    Minuteman
  • Jul 6, 2010
    1,652
    382
    36
    Denver, CO
    109 Berger
    CCI 450
    Hornady brass
    35.5 grs H4350
    2880 FPS

    Even with virgin Hornady brass that I don’t do anything but load or run a mandrel through and load it is shooting great. Great feeding out of my 12 rd unmodified MDT AICS mag in an XLR/Bighorn. Only 1/3 the way through this barrel but besides the speed it’s lived up to the hype for me, I’m happy with it.

    E93C5CF8-B29E-45D5-A453-94E3A4176EBB.jpeg
     
    • Like
    Reactions: MinnesotaMulisha

    Juggerxxx

    Sergeant
    PX Member
    Minuteman
    Feb 13, 2017
    707
    275
    109 Berger 35.7gr H4350 0.050” off the lands going 2880fps. CCi400 Hornady brass and using a G7 0.300. 5FDFD2E8-BCC4-4CDF-BB59-FC3005A6029C.jpeg
     

    hookedonbrass

    [ ]
    PX Member
    Minuteman
    May 16, 2018
    1,754
    1,331
    31
    Montpelier, Virginia
    what barrel life are guys getting now that's it been out a bit?

    My buddy said his took a dump at ~1000-1200rds he was pretty bummed.

    another said he pulled his at 1800. but only because it was a good time to switch to his second GT barrel. he said it was still shooting well
     

    Patriots1884

    Private
    PX Member
    Minuteman
    Mar 6, 2017
    121
    95
    109 Berger
    Alpha brass
    cci 450
    37.0gr H4350
    2900 fps
    24" barrel

    Recently got some of the new Alpha OCD brass and went up to 37.7gr and got 2955 so eventually I will transition to the ocd stuff but my 400 pieces of original Alpha brass are only on the 3rd firing so some good life left in them.
     

    Dthomas3523

    Hall Monitor
    Staff member
    Moderator
    Supporter
    Hessian
    Commercial Supporter
    PX Member
    Minuteman
  • Jan 31, 2018
    10,057
    13,722
    South Texas
    what barrel life are guys getting now that's it been out a bit?

    My buddy said his took a dump at ~1000-1200rds he was pretty bummed.

    another said he pulled his at 1800. but only because it was a good time to switch to his second GT barrel. he said it was still shooting well

    Was his reason for pulling it velocity loss or accuracy? Did he clean it down to the steel and verify?
     
    • Like
    Reactions: The_Count

    hookedonbrass

    [ ]
    PX Member
    Minuteman
    May 16, 2018
    1,754
    1,331
    31
    Montpelier, Virginia
    Was his reason for pulling it velocity loss or accuracy? Did he clean it down to the steel and verify?


    the first guy pulled it cuz velocity dropped and groups opened up. and he couldn't get it back. not sure exactly what he tried. he just told me he has another barrel that's at 1400 and still going strong he just hasn't been shooting it lately.

    the other guy only pulled it because he got another barrel in and didn't want to chance the 1800ct barrel to go on him in a match. he said it had opened up a little bit but was still under 1/2min
     

    Dthomas3523

    Hall Monitor
    Staff member
    Moderator
    Supporter
    Hessian
    Commercial Supporter
    PX Member
    Minuteman
  • Jan 31, 2018
    10,057
    13,722
    South Texas
    the first guy pulled it cuz velocity dropped and groups opened up. and he couldn't get it back. not sure exactly what he tried. he just told me he has another barrel that's at 1400 and still going strong he just hasn't been shooting it lately.

    the other guy only pulled it because he got another barrel in and didn't want to chance the 1800ct barrel to go on him in a match. he said it had opened up a little bit but was still under 1/2min

    I’d be pretty surprised if barrels don’t last at least as long as dasher.

    I stopped running it earlier this year due to the alpha brass fiasco. But running it again now with hornady. I should burn out a couple barrels by mar/april.
     

    Gulep001

    Private
    Minuteman
    Apr 23, 2020
    50
    34
    Las Vegas, NV
    105 Berger Hybrid .070 off
    CCI 450
    Hornady brass (on 6th firing, pockets still tight)
    34.0 Varget 2,990
    33.5 Varget 2,930
    33.0 RL-16 2,820
    35.8 H4350 2,880
    Stuteville Bartlein 26”MTU prefit.
     

    Coltonlrs

    Private
    Minuteman
    May 29, 2019
    53
    11
    Berger 109gr
    3,000fps
    Es 7fps
    Sd 2.7 fps
    26 inch patriot valley barrel
     

    Attachments

    • 9151253D-558D-4E50-A761-DE3F05820189.jpeg
      9151253D-558D-4E50-A761-DE3F05820189.jpeg
      696.1 KB · Views: 9

    Gulep001

    Private
    Minuteman
    Apr 23, 2020
    50
    34
    Las Vegas, NV
    How do you like rl16? Are you maxing out at 33gn?
    I was actually running 33.5 RL16. Typo above. No pressure signs. Found the load from another 6GT thread just to see what it would give me and for data on other powders as back up. Worked great and never bothered trying another charge weight. I dont like to spend too much time chasing SDs and groups. GT has been really easy to load for. Reload it consistent and low SDs by default. I used to run it at 3,020. Now im backing off charge slowly, getting velocities slower and it still shoots. I see no advantage really in running it 3,000 + at PRS matches
     
    • Like
    Reactions: kriller134

    kindabitey

    See, nobody cares
    Supporter
    Hessian
    PX Member
    Minuteman
    Feb 13, 2017
    816
    845
    Alpha OCD brass
    Fed 205M
    37.0 gr VV N555
    115 Dtacs at -.020
    2775 avg es-17 sd-4.2 for 26 rounds (4 of the 30 round string did not register)
    PXL_20210103_190602692.jpg
    This is w/ 65 rounds on a new Stuteville 26" 7.5 twist. I expect it to speed up to around 2850ish.
     

    kindabitey

    See, nobody cares
    Supporter
    Hessian
    PX Member
    Minuteman
    Feb 13, 2017
    816
    845
    what barrel life are guys getting now that's it been out a bit?

    My buddy said his took a dump at ~1000-1200rds he was pretty bummed.

    another said he pulled his at 1800. but only because it was a good time to switch to his second GT barrel. he said it was still shooting well
    I pulled mine at 1950, but it was still shooting well and no velocity loss. I might stick it back on after I get a few more through the new one, and see how far it'll go.
     
    • Like
    Reactions: hookedonbrass

    DDRH65CM

    Private
    PX Member
    Minuteman
    Jun 27, 2017
    545
    216
    Alpha (non-OCD) and Hornady Brass
    CCI BR4
    H4350 @ 37.75gr
    26" 7.5tw Proof Comp. Contour (GAP Spec chambered by Straight Jacket Armory) - bbl @ ~900rnds
    105Hyb - 3025fps
    108ELDM - 3020fps

    That Hornady Brass is pretty good. Going through it's 4th firing. I do get some cratering and ejector marks, but no heavy bolt lift or extraction issues.
     
    Last edited:

    30cal user

    Sergeant
    PX Member
    Minuteman
    Dec 20, 2008
    625
    78
    39
    SE, LA
    6mm GT
    BulletPowderChargePrimerBrassCBTOVelocityBBLROT
    6mm GT105Varget33.5450Alpha1.94293230
    6mm GT105Varget34.1450Alpha1.94297930
    6mm GT105Varget34.2205mAlpha301830
    6mm GT105Varget34.5450Alpha1.94300030
    6mm GT105H435037br2Horn3015
    6mm GT105H435037.8205mAlpha1.968301730
    6mm GT105H435037.75BR4Alpha302526
    6mm GT105H435036.5cci 450Horn290026
    6mm GT107N14033.1205mAlpha20 OTL288430
    6mm GT107Varget33.4205mAlpha1.967290830
    6mm GT107Varget34205mAlpha1.967297130
    6mm GT107H435037.8205mAlpha1.967301030
    6mm GT107SW Prec33.8205mAlpha1.967290930
    6mm GT107H435038.2Horn3060
    6mm GT107RL 16Horn3100
    6mm GT108Varget33.2450Alpha1.94289730
    6mm GT108Varget33.5450Alpha1.94296030
    6mm GT108H435036.6205mHorn70 OTL295130
    6mm GT108SW Prec34.1205mHorn1.987298230
    6mm GT109Varget34.5450Horn2950
    6mm GT109Varget65 OTL2910267.5
    6mm GT109Varget34BR4Horn300026
    6mm GT109H435037cci 450alpha290024
    6mm GT110Varget34450Alpha1.9752917
    6mm GT110SW Prec34205mHorn1.983290530
    6mm GT110H435036.9205mHorn38 OTL295030
    6mm GT112Varget33.4br2Horn2915
    6mm GT112Varget33.5450Lapua1.94290030
    6mm GT112Varget33.9450Alpha1.94289030
    6mm GT112H435036.6br2Horn2932
    6mm GT112STA ball39.5br2Horn2965
    6mm GT115Varget32.3450Alpha1.94279430
    6mm GT115Varget33.5450Alpha1.94290130
    6mm GT115Varget34.2450Alpha1.94292430
    6mm GT115RL 1636.9450Horn2855
    6mm GT115RL 1637450Horn2875coated bullet
    6mm GT115H4350Horn2970
    6mm GT115N55536.530 OTL2854267.5
    6mm GT115N55537205mAlpha OCD20 OTL2775267.5low rnd count
     
    Last edited:

    drwood96

    Samsonite! I was way off!
    PX Member
    Minuteman
  • Sep 16, 2017
    608
    370
    Tuscaloosa, AL
    rolltide.com
    Alpha OCD brass
    Fed 205M
    37.0 gr VV N555
    115 Dtacs at -.020
    2775 avg es-17 sd-4.2 for 26 rounds (4 of the 30 round string did not register)
    View attachment 7526598
    This is w/ 65 rounds on a new Stuteville 26" 7.5 twist. I expect it to speed up to around 2850ish.

    What freebore are you running? I have .120 and 1k DTAC but read they sit deep in the case and cause issues.




    It might be beneficial to post freeborn as well since there are two popular ones out there.

    Standard .120
    Heavy/long .170
     
    Last edited:

    drwood96

    Samsonite! I was way off!
    PX Member
    Minuteman
  • Sep 16, 2017
    608
    370
    Tuscaloosa, AL
    rolltide.com
    Common 6 GT Powders
    •IMR 4166
    •Varget
    •SW Precision
    •H4350
    •RL16


    From George, Updated 04-03-2020

    AMP Aneal codes. Pilot. 73

    Mk 1 STD mode use code 82

    Aztec mode use 142 for Hornady, 141 for Alpha.

    If you are going to analyze using Aztec use pilot code 073 C

    These are COAL to the lands for various bullets. These were measured on brand new barrels with the OG reamer and the Current, JGS and PTG. there was a +/- variation of .005 either side, so reamers as well as bullets vary lot to lot. They will always vary a tad Chamber to chamber , Rifle to Rifle. . Back off .010 as a MIn.

    103 Vapor Trail 2.560

    105 Berger Hyb 2.585

    105 JLK 2.590

    108 Hornady ELD 2.545

    110 H A Tip. 2.620

    112 Barnes 2.605

    115 Nosler RDF 2.545

    115 DTAC. 2.580

    In looking at these #'s the current .120 FB is still the best for the standard Reamer as it will work well for everything and is the best for 105-109 Berger Hybrids, 112 Barnes and the Hornady 110 Atip

    If guys were wanting a specific chamber cut for 115 RDF, 115 Sierra, 108 Hornady ELD or 103 Vapor Trail a .170 FB would probably be ideal for those 3 bullets which GAP does have a .170 FB Reamer but Its only used on request.
     

    K-wal

    Private
    Minuteman
    Oct 23, 2019
    18
    5
    26” PVA Zermatt Origin
    Virgin Hornady brass
    109 Berger .040 jump
    34.3gr Varget 2900 fps
    Winchester primer
    SD 2

    I get some cratering, but nothing crazy. I have some CCI 400s I can try as well.

    Break-in load
    Hornady brass
    33.5gr Varget
    Hornady 108 ELD .020” jump
    Winchester primer
    No velocity data
     

    NiteQwill

    Private
    PX Member
    Minuteman
    Jun 26, 2012
    510
    405
    Uncle Sam's Bottom
    Berger 109
    37.6 H4350
    0.020 jump
    CCI 450
    Alpha Brass
    3000 fps from Hawk Hill 26" bbl

    Berger 109
    34.5 Varget
    0.020 jump
    CCI 450
    Alpha OCD Brass
    2921 fps from Stuteville/Bartlein 26" bbl (brand new, expect more speed)

    Both are single digit ES and SD among continuous 10 shot groups.
     

    khuber84

    Aim small, miss small
    PX Member
    Minuteman
    Nov 29, 2008
    704
    322
    36
    Montana
    They show pressure signs easy. Ejector marks come very early. I just use them as a count of how many times fired lol.
    Soft case head on some.
    You'd think alpha would make things right with their customers. I thought their Creedmoor cases were soft too so sold em. Maybe all alpha brass is soft? They had to OCD to get it to hold same psi as lapua/Peterson, hopefully they spread that through all their cases and it becomes standard.
     

    Kadams1563

    Giver of Bad Advice
    PX Member
    Minuteman
    Feb 13, 2017
    1,780
    1,371
    I wish they would replace my standard brass with the OCD stuff but it isn’t that big of a deal really. I just don’t load them extremely fast. Running a 108 with H4350 at 2980 without any issue.
     
    • Like
    Reactions: Darkside-Six

    Dthomas3523

    Hall Monitor
    Staff member
    Moderator
    Supporter
    Hessian
    Commercial Supporter
    PX Member
    Minuteman
  • Jan 31, 2018
    10,057
    13,722
    South Texas
    You'd think alpha would make things right with their customers. I thought their Creedmoor cases were soft too so sold em. Maybe all alpha brass is soft? They had to OCD to get it to hold same psi as lapua/Peterson, hopefully they spread that through all their cases and it becomes standard.

    Anytime I complained, I was told by alpha and their supporters it was my fault or the barrel had a tight bore (3 bartleins and 1 proof).

    So......🤷‍♂️🤷‍♂️🤷‍♂️
     

    kindabitey

    See, nobody cares
    Supporter
    Hessian
    PX Member
    Minuteman
    Feb 13, 2017
    816
    845
    What freebore are you running? I have .120 and 1k DTAC but read they sit deep in the case and cause issues.




    It might be beneficial to post freeborn as well since there are two popular ones out there.

    Standard .120
    Heavy/long .170
    I didn't add the freebore, because I have no idea what it is. It's whatever reamer Stuteville uses.
    Honestly, I don't really care. I start at -.020 and as long as the bullet/powder combo is under 3/4" at 100, and ES is under 30 (at least 20 rds.) I'm off and running.
     
    • Like
    Reactions: drwood96

    Darkside-Six

    My Dixie Wrecked
    PX Member
    Minuteman
  • Oct 8, 2013
    3,343
    710
    what barrel life are guys getting now that's it been out a bit?

    My buddy said his took a dump at ~1000-1200rds he was pretty bummed.

    another said he pulled his at 1800. but only because it was a good time to switch to his second GT barrel. he said it was still shooting well

    I’m just under 3k and mine is still going strong so not sure what’s wrong with his.
     
    • Like
    Reactions: hookedonbrass

    Darkside-Six

    My Dixie Wrecked
    PX Member
    Minuteman
  • Oct 8, 2013
    3,343
    710
    Hornady 110 A-Tips
    .30 off
    Hornady brass
    CCI 450’s
    34.5 varget 2950

    Berger 109 Hybrids
    .60 off
    Hornady brass
    CCI 450’s
    34.5 Varget
    2950

    Berger 109 Hybrids
    .60 off
    Hornady brass
    CCI 450’s
    Varget 33.2
    2870

    Berger 105 Hyrbids
    .60 off
    Hornady brass
    CCI 450’s
    Varget 34.5
    3050

    Berger 105 Hybrids
    .60 off
    Hornady brass
    Varget 33.8
    2950
     

    Darkside-Six

    My Dixie Wrecked
    PX Member
    Minuteman
  • Oct 8, 2013
    3,343
    710
    I wish they would replace my standard brass with the OCD stuff but it isn’t that big of a deal really. I just don’t load them extremely fast. Running a 108 with H4350 at 2980 without any issue.


    They did make some newer 6GT brass that was the OCD. So far all the reports I’ve seen of people using it had no issues. Not like the original.

    I’m waiting for more to come back in stock. Will probably switch to that from the Hornady. The Hornady has worked fine but after about 7 firings on it many of the pockets are starting to loosen on mine.