I would size them and then see what happens on second firing. My thought is your feeling a little more than usual resistance due to the cases being crush fit but to me the primers and the charge weight/speeds seem perfectly normal. Also make sure chamber is clean oil or cleaners can cause issues.
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6mm BRA
- Thread starter cjherrman
- Start date
I've never used Petersen brass, but it looks like others have the same issues in mild loads upon first firing with that brass brand.
So as far as accuracy goes should I put some more rounds down the tube before I worry or call the smith? I picked bra because everyone always talks about how easy it is to load for especially fire forming.
I would load up 20-30 round all exactly the same (30gr varget and a Berger 105) and shoot a bunch of 5 round groups to really see what it's doing. One group of this and one of that isn't telling you anything.
What are your expectations for the barrel?
Are you able to personally shoot up to those expectations consistently?
My expectation was 1/2” 5 shot groups or better consistently at around 2800-2850. Obviously the smaller the group and faster speed preferred but I was trying to set a very realistic goal. Yes I’m capable of the 1/2” groups, I was just nervous about the pressure signs, and the Hornady bullets grouping a solid 1.5”, along with a few of the Berger groups. After hearing it’s probably fake pressure signs from the brass I’ll load up a bunch like you said, and if there’s still no hope for accuracy after that I’ll go from there.
Thanks!
03machstock
be sure to jam your fire forming rounds to help form the shoulder and avoid spring back good luck and good shooting.
You do not need to jam to fire form BRA....the AI chamber is cut -.004 or should be so you get a slight crush fit when cambering standard BR brass.
