I have send a P.M. for You. Have You received it?
No, it doesn't work at least for me.
Are you that guy from nitroexpress.com who can't find right ammo for your drilling? If yes, I wanted to tell you, that D of bullet for such rifling as you have usually is slightly larger, than D1, D2 etc of such bore. Listen to experts what thay said.
I got the same type of rifling on my .577 Express.
Thank's for explanation re. Grundig, I think we know it, but the problem is the guy from Canada who asked me to help him to determ right caliber disappeared and didn't make chamber casting. Without it all talking about it is just talking
