Noted! Thanks Bill

At this moment I am thinking the counter bore for the rim will be .064" deep or basically the max spec for the 7x57R case rim. Of course that is the distance from the bolt face. There is .007" clearance between breech end of barrel and bolt face so. .064" - .007" = .057" actual CB depth as depth mic'd from barrel breech face.

I'll wait a day now hoping to get one more rim thickness from a Norma case

Last edited by LRF; 02/04/21 03:44 PM.