First let me say I have searched the forum and still need opinons, I load for a coupled different belted magnums but experiencing problems with my 300 Win. Mag Sendero.
I have checked casing length 2.620 and have turned the necks, full length resizing, loading 208 Amax with 73.5 H1000 put still have a tight bolt when ejecting spent rounds.
The rounds chamber without any tightness or difficulty, just after firing bolt lift is easy just tight casing no shinny marks or other pressure signs on primer.
Holding about a inch at 200 yards and want to address the problem before I go any farther.