I typically size all my cases for hunting rifles full length, and, using an RCBS Precision Mic, take the cases (size) down -.003 less than what a fired case measures.
I've told a friend I will load him some .270 ammo for use in his Rem 7400 auto. His fired cases measure +.008 on avg. (same cases, his rifle, same factory load) .
Should I use the same approach, and size his cases down -.003 less (to
.005)? I have heard that the Rem autos are picky, and small base dies are recommended, etc.
Should I take the cases down more to account for this?