Re: bullet run out on full sized cases
DON'T GO THERE [img]/ubbthreads/images/graemlins/grin.gif[/img]
Was driving me insane but is helpful in diagnosing cranky rifles.
I check fired cases and sized cases. In almost all the rifles I own, runout is 0 to 2thou. That is excellent given that my guage has a tolerance of 1 thou error.
I use Lee Collet neck sizing dies whenever I can and cases show no change before and after sizing. No doughnuts either.
however, after seating the bullets, runout AT THE BULLET can increase. The neck/shoulder runout doesn't change though.
Crazy part is that even with runout varying (at the bullet) of one thou to 5 thou, groups are still very small. In fact, the smallest group one rifle ever shot was with the batch of highest bullet runout cases.
So I now keep track of case runout, and forget about the bullet runout unless I start to see problems on the paper.
Right now I am playing with my new 6.5 Mystic 1000mBR rifle. Runout for the cases are pretty much zip. Loaded rds show very low runout but a few cartridges can bump up to 4thou. Groups so far have been bugholes at 200yds using Lapua 139gr Scenars.
I am not going to worry about it anymore...