Quote Originally Posted by MarshallDodge View Post
For bolt guns, I bump the shoulder back on fired brass .001-.002"

Semi autos my require more, as much as .006" bump, as they tend to stretch quite a bit. I take new factory ammo, measure and fire it, then measure again. The difference is what I usually set the sizing die to bump.
I bought these awhile ago for all my bolt guns and they seem to be working pretty good. Not really cheap but its a buy once cry once kinda thing I guess. I have been setting my shoulder back .002 and everything seems to be working good. https://www.whiddengunworks.com/product/case-gauge-3/ Wilson case gauges are a great tool also,especially for the semi-auto rifles. https://lewilson.com/case-gage