Les, I already have some brass from Bertram however it has 0.022" headspace in my gun and I am a bit reluctant to fire it. I have a set of CH4 reloading dies which includes an expander to form other brass such as 8x57, however I am a bit of a stickler for the correct head stamp, so if there is some other brass available I would definitely be interested.

I would still like to use the Bertram brass and was wondering if anybody else has any techniques to safely bring the shoulder forward without weakening the cartridge head. I can make another bolt head however that is a lot of work so I was thinking of fireformimg the case with some lubricant on the outside so that the brass doesn't grip the chamber and allows the entire case to stretch rather than only at the head. Any help would be appreciated.

Waidmannsheil.