Honestly the Peterson long brass seems the most attractive for Win Mag. I’m still new to loading for it, but the headspace grew .014” on the brass I’m using so I’m just waiting for case head failure. Peterson long brass seems to reduce that incidence and is of reputed quality.
The case is designed to stretch at the shoulder and it will not separate.
The headspace didn’t grow either, the headspace is held to .220” from the case head face to the front of the belt, plus .003” .where do you guys read this BS?
Cheers.
