Checking Headspace

popper

Well-Known Member
HS is set by your die for YOUR chamber, NOT saami. 2 GKs have 243 each. Short HS ammo will fit in one, not the other! If you set your rifle's HS to 0.005 by the sizing die you probably get 0.007 on fired case. If you anneal, most stretch will be in shoulder so case separation should not be a problem. I got a bucket of 30/30 cases not touched yet as the first batch hasn't worn out. I shoot a lot of 30/30. Same with 308.