6BRA load data

[Jason D Hostetter]

It reads BRA, and it is. Several I know are shooting in the mid 33s and doing well. All set ups are different. Lapua brass .

And I'm not saying people aren't, I am saying, the brass and 40 degree shoulder are masking the pressure, just like the Sherman wildcats. You literally can't put 32.5+ grains in a case that doesn't hold even a full grain more h2o that a straight BR, and say it's not high pressure. Depending on lot strength, you could lock a bolt up, with 109s and 31.5grns in a BR, so another 1-2grns is 80k psi.

 

[JEFFPPC]

And I'm not saying people aren't, I am saying, the brass and 40 degree shoulder are masking the pressure, just like the Sherman wildcats. You literally can't put 32.5+ grains in a case that doesn't hold even a full grain more h2o that a straight BR, and say it's not high pressure. Depending on lot strength, you could lock a bolt up, with 109s and 31.5grns in a BR, so another 1-2grns is 80k psi.

When I got to 33.5 I started to get a bit of bolt lift resistence. 32.9 33.0 33.1 all shot together group wise so I picked the low pressure version. I don't get your point. If your not comfortable shooting there, don't. At 2800 it shot in a tiny hole but I want more and still a small hole. So now at 2940 I still feel a bit puny after many years of 6BRX at 2990.

 

[Della]

32.9 is definitely stout. 31.5 of Varget and a grain less in 4895 with 105 hybrids gets me 2940 in a 28” barrel. (Alpha brass)

 

[Rick300]

Would like to see how many firings you get on that brass. When I went north of 3000fps the primer pockets loosened up between 4-6 firings. Back down in the 2900's now for me.

 

[Owens85]

When I got to 33.5 I started to get a bit of bolt lift resistence. 32.9 33.0 33.1 all shot together group wise so I picked the low pressure version. I don't get your point. If your not comfortable shooting there, don't. At 2800 it shot in a tiny hole but I want more and still a small hole. So now at 2940 I still feel a bit puny after many years of 6BRX at 2990.

Thats a really slow lot of powder or barrel. I've shot several different lots of varget in a Bra and never seen it that slow. My current lot is 31.4 and a 105 and it's 2940ish. Last lot was 32.1 and 2960 all in 28 inch barrels. 32.1 in New lot is around 3000 fps.

 

[Alex Wheeler]

When I got to 33.5 I started to get a bit of bolt lift resistence. 32.9 33.0 33.1 all shot together group wise so I picked the low pressure version. I don't get your point. If your not comfortable shooting there, don't. At 2800 it shot in a tiny hole but I want more and still a small hole. So now at 2940 I still feel a bit puny after many years of 6BRX at 2990.

What barrel?

 

[Gabe22BR]

Dasher loads in BRAI..

Someone gonna FAFO… real quick !!!

 

[JEFFPPC]

What barrel?

Krieger

 

[Jason D Hostetter]

If you're not happy with 2800s use a longer barrel, different powder, or different cartridge. I'm sorry but if you have bolt lift at 33.5, that's probably 82k psi, a half grain less with Varget is typically 4-6k psi depending on the cartridge. I like to run things fast too, my 30" 6GT takes 105s to 3200, with Staball 6.5 and is actually within published data, not that I'm afraid to exceed it on occasion, I did go to 3260, still no pressure, but accuracy was shit. And I know it's safe because I can get 3150 from a 23" barrel with no pressure and the same combo. The short version would be, I like running things hard, but not to the point of some debris or moisture locking the bolt up, or the random carbon ring spike, that might eject the bolt out the ass end of the action, because I like my face intact, more than velocity.

 

[Tpb10505]

When I got to 33.5 I started to get a bit of bolt lift resistence. 32.9 33.0 33.1 all shot together group wise so I picked the low pressure version. I don't get your point. If you’re not comfortable shooting there, don't. At 2800 it shot in a tiny hole but I want more and still a small hole. So now at 2940 I still feel a bit puny after many years of 6BRX at 2990.

I shoot mine at 2930. I would’ve liked more velocity but I was getting heavy bolt lifts. I find that prioritizing an accurate load with a wide node is worth more points than the extra velocity anyways.

 

[Fire Dog]

Would like to see how many firings you get on that brass. When I went north of 3000fps the primer pockets loosened up between 4-6 firings. Back down in the 2900's now for me.

My thoughts exactly. I have Peterson 6BR brass that now has over 15 loads on it {SS pin wet cleaned and annealed @ time} and haven’t lost a case to primer pocket failure running 30.1gr of Varget/AR2208, CCI450’s with 107’s running at 2’850fps.