Originally Posted by elktaxi1
i use the 338 rcm and 300rcm to step down to 7mm 375 the other option might be the 7lrm brass from gunwerks you would just need to step up to 30cal. hornady may also have brass too. we had a guy come hunt this year that has a 30 375 he got though there 1000 brench rest program sorry cant remembered what he called it and his brass was head stamped for the caliber.
The problem I have is I am pushing the shoulder back approx. .080" so I am first using a 375 full length to get the shoulder where it needs to be. The RCM might be ok after that (what is the shoulder diameter of the RCM?) If it is wide enough, it should work. I was thinking of a RUM, Lapua, etc., to be sure of the width?
LRM brass is out as they won't sell it unless you buy a rifle from them
! I have talked to Hornady about brass but have had no luck there.
I think if I just use the 375 full length, and then the right 338 neck sizer, I can get really close and then fire form the rest to get my 40 degree shoulder. (or maybe even push it back the rest of the way with my 40 degree die when I get it)......Rich