Originally Posted by ajhardle
Well, I feel foolish. The brass is being dented by the feed ramp.
That means my handloading technique and/or chamber specs are off. The lee collett neck die turns out rounds that measure near perfect on my rcbs concentricity gauge, but less than excellent groups. I see new brass shoot .20's to 40's when conditions are perfect, but by 3 firings, i' not bettering .60 with any consistency. The f/l sizer nets worse results.
Maybe, that's the difference between a factory barrel, and one chambered by a good gunsmith? Any advice and insight is appreciated. Thanks everyone.
Glad you found the problem.
My only suggestion would be to go to a center feed mag box. (It feeds directly into the chamber
and doesn't need the ramp to guide the round.
The 40o shouldered cases have feed problems in a staggered feed and this is the best fix for them.
J E CUSTOM