quote:

Originally posted by Atkinson:
Turn new brass? why, you need to shoot it in your chamber and fireform it first, its always short when its new, don't cut it shorter, wait until it needs it..mostly to keep pressure, some guys get so et up with teck its scary! Ive seen some old time awesome bench resters that are sloppy as hell, just fill a case full of powder and shoot!

Unless Im shooting my bench rest chambered guns with zero tolerance necks I never outside or inside turn brass, it overworks the brass and leads to splits with factory chambers that are oversize so one shoe fit all so to speak..I trim necks regularly as needed..The less brass is monkied with the better IMO..and all pertains only to bench guns IMO, it makes so little difference on a hunting rifle..like a couple of hundred throusands in group size, oh my Gosh!!

The other thing is these case trimmers are not nearly as accurate as some seem to think they are..If Im going to use a crimp and I want it in the exact placement with each and everyload I will use a file trim die, its accurate and each case will be correct for a factory roll crimp..I do this with double rifles, and Winchester, Marlin levers etc. If your shooting bench rest, probably best to read your case with Micrometer and vise, not a caliper.