arlaunch
Active member
This last year i have been getting into larger calibers than
223 REM.
I have been working with Starline Brass in .308 and .270 Win as of late.
What i have noticed with the larger calibers is that some pieces will barely bump at all, and others will be way oversized.
I segregate all brass by number of firings, into lots and never mix. Even with 1 time fired brass i am getting large variations in shoulder bump.
Is this the brass, or is it just a common issue with larger calibers?
It is very frustrating to size one piece to find it did not bump the shoulder at all. Then have to run it through a second time. Then get another piece and it pushed the shoulder back .005 instead of .002 for a bolt rifle.
Each and every round needs to checked for headspace, then the die adjusted for the longest round to be set back .002-.003
Then half the cases are grossly over-sized...
223 REM.
I have been working with Starline Brass in .308 and .270 Win as of late.
What i have noticed with the larger calibers is that some pieces will barely bump at all, and others will be way oversized.
I segregate all brass by number of firings, into lots and never mix. Even with 1 time fired brass i am getting large variations in shoulder bump.
Is this the brass, or is it just a common issue with larger calibers?
It is very frustrating to size one piece to find it did not bump the shoulder at all. Then have to run it through a second time. Then get another piece and it pushed the shoulder back .005 instead of .002 for a bolt rifle.
Each and every round needs to checked for headspace, then the die adjusted for the longest round to be set back .002-.003
Then half the cases are grossly over-sized...