Originally Posted by
Ernest T
New Lapua 6.5 CM brass measures 1.529 from base to the middle of the shoulder with a .400 collet in my comparator. The fired brass in my rifle measures 1.537+ or - a thou and a half, so I knock the shoulder back about .003 with the FL sizing die before reloading.I talked to a couple guys at the range a month or so ago and changed the way I prep brass for reloading. I used to de-prime, clean with a rotary tumbler, dry in the oven, then lube, re-size, measure and trim if necessary. Then I'd wipe down the outside of the case with a rag and the inside with a Q-tip, load the powder, seat the bullet and crimp. Now, I lube the dirty brass, de-prime and re-size before trimming and then clean and dry. Once its clean, I load the powder, seat the bullet and crimp.