ThanksI can't be much help except to say that it should be very much like a 30BR, given equal neck wall thickness. The neck is about .070 shorter than the BR. I don't own an AMP, but don't they index off of the shoulder? If so, I'd think the setting would be the same for both...but I may be totally off base.
Personally, I haven't annealed for short range in several years. Brass life has been excellent and primer pockets typically go before anything else. I've gone as many as 50 firings, though.
50 was a few more than I should've pushed them but I didn't see any accuracy degradation with it until the last couple of firings. It started double grouping. New brass fixed it at that point.Thanks
I’ve been told by others as much as 50 firings with out annealings.