6mm BRA for PRS -- Great out of the Gate

[Forum Boss]

This rifle belongs to Shane Sivertsen (aka SoDakDasher in our Forum). It features a Lone Peak Fuzion Action with Trigger Tech Diamond trigger (flat shoe). Up front is a Benchmark 26” MTU barrel chambered in 6mm BRA (a 40-degree 6mmBR Improved “BR Ackley”). It’s all nestled into a McMillan A5 stock with adjustable cheekpiece. Getting him on target is a Vortex Razor 4.5-27x56mm optic in Hawkins rings with a Vortex throw lever on the power ring for quick magnification changes. The Atlas PRS Bipod rides on an Area 419 ARCA rail up front. The barrel is finished off with a Piercision 5-Port Self-Timing Muscle Brake.

6mm BRA Chambering
Shane spent quite some time trying to decide which 6mm cartridge to choose. After much deliberation with Travis, he chose the 6mm BRA (aka 6 BRA), mainly due to the reputation this little cartridge has earned for accuracy and ease of tuning. This rifle is Shane’s second TS Customs-crafted rifle: “the [other] is basically the same action/barrel combo but set in an MPA chassis and chambered in 6mm Dasher.”

Excellent Accuracy with Varget and Berger 105gr Hybrids
Shane’s 6mm BRA is showing impressive accuracy: “Thanks to Mother Nature this spring (with cold, snowy weather), I have only been able to get 100 rounds fire-formed and the barrel broken-in. I started with 30.5 grains Varget in Lapua BR brass with CCI 450s and topped off with Berger 105gr Hybrids. Velocity averaged 2830 FPS with an SD of 4.7 from 10 rounds randomly picked from the lot.”

Shane knows there’s still more load development to do. But this rifle is grouping under one-half MOA and Shane says the gun can definitely out-shoot his abilities. He admits it’s still a work in progress but he is happy with the gun’s performance so far.

 

[JFrank]

That’s real accurate for a break in load.
Any plans to get some H4895 under the hood.

 

[Raythemanroe]

That’s real accurate for a break in load.
Any plans to get some H4895 under the hood.

Or RL15


Ray

 

[mikeinct]

From what I have seen on the targets. Stick with Varget. mike in ct

 

[Forward543]

I have had decent luck with h4895. Fireform at 29.5, 105-108 bullets, cci br primer. Running 31.1 h4895 with berger 105 for comp use. 2921 fps with a 26" barrel.
The fireform bullets were easily the most accurate rounds i have ever done zero workup for. Shot a club match with them and had no issues.
There is quite a bit of load data on here for this round.
Good luck.

 

[chevytruck_83]

I have had decent luck with h4895. Fireform at 29.5, 105-108 bullets, cci br primer. Running 31.1 h4895 with berger 105 for comp use. 2921 fps with a 26" barrel.
The fireform bullets were easily the most accurate rounds i have ever done zero workup for. Shot a club match with them and had no issues.
There is quite a bit of load data on here for this round.
Good luck.

I agree. I think your gonna start seeing a lot more 6bra rifles. I shot these at 200 yards fire forming brass. No load development. Like you said. Easily my best groups. Consistently. Dare I say hawk hill chambered my barrel as a prefit for a impact precision action..

 

[Caleb85]

I have been shooting the BRA in matches for a while now, I love that little thing! Except when there is a spinner past 600 yards! Lol. I have alway shot 105JLKs or 105 hybrids. But I just spun a new barrel for the 103 VT-TAC’s.
Here is 5@500

 

[Zero333]

^^^
That 500 yard group looks to be right around 1.1"-1.2" !!!
Damn sweet !

5-shot groups are where it's at.
3-shot groups are acceptable with lightweight hunting rifles, but irrational with target rifles.