6mm BR
- Thread starter Bugzlife19
- Start date
Yes I trimmed it to 1.550” per my reloading manual and that was obviously too short. Did I ruin this brass or can I just run it with less powder and eventually it will lengthen out again?
Nah nothing wrong with that. Typical 6br chambers are 1.570, 0.020" under is not a problem. I'd purchase a teslong bore cam if you don't have one, and inspect the throat area.
It’s only this set of reloads though. I just shot a match yesterday with virgin brass with the same load and had 0 problems.
I might have missed it but what die are you using? Could it be the brass has grown so much and the die is not sizing the body down enough which is causing the brass to swell up and not contract which could be causing the increase in pressure therefore increasing velocity?
Could there have been moisture in the chamber or some left over cleaning fluid causing a spike in pressure?
Could there have been moisture in the chamber or some left over cleaning fluid causing a spike in pressure?
It sounds like now would be a great time to to revisit all types of your brass and measure everything and record it. Case length, neck diameter both before and after , case diameter right at neck-body junction, case diameter at base above web reinforced area, comparative headspace, etc.
Oh, and do you anneal at all? Just curious.
I make the necks glow red and the annealing line is below the shoulder, what I found is that if you don't get it red when you bump the shoulder and size the neck there is spring back. I swear its more of an art than a science.
Berger 108EH jumped 55-60 thou and Varget... 30.0 grains look good considering I watched the reticle on shot #4 drop low left just as the shot broke. 28" Benchmark.
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109 Berger, Viht N150, jumping 60k, L group is 30.5 going 2860, R group is 30.0 going 2815. Both 10 shot group. UPS man dropped barrel off yesterday, had a bunch of virgin brass to FF, loaded up 105 and 109s with Varget and N150, did some jump tests for break in.
Built a cheap 6br for practice, solus action, 28in CRB 7.5TW M24, MDT chassis, theos scope. Shoots pretty dang good.
Built a cheap 6br for practice, solus action, 28in CRB 7.5TW M24, MDT chassis, theos scope. Shoots pretty dang good.
30 grains of N150 and berger bullets must be a prophecy or something... 
108 Elite Hunter's jumped .060 from a 28" Benchmark.
108 Elite Hunter's jumped .060 from a 28" Benchmark.
These lil 6br are pretty sweet, they'll pretty much shoot half moa with minimal effort. Just pick the speed you want to run and go.
That’s why we call them the easy button. 30gr of something decent and you’re golden.
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Had to drop to 29.8 to keep mv at 2810-2820 as things sped up a bit by the time I had 250 rds on the barrel.
29.8gr N150, 2815mv avg, 109lrht -60 cci450.
100y zero check 8 shots dialed L 0.2 mil, and 7 shots at 400y.
29.8gr N150, 2815mv avg, 109lrht -60 cci450.
100y zero check 8 shots dialed L 0.2 mil, and 7 shots at 400y.
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