Quote Originally Posted by DebosDave
Well, in trying to eliminate variables in my process to give me a clue as to what to do differently, It occured to me that I should measure the neck diameter on the reamer. It turns out that the reamer has a neck of .290", which is exactly why my finished brass comes out right about .290". This means that my process is intact, and that the chamber I reamed is in good condition. The reamer didn't walk, it was just spec'd slightly too large in the neck. I am sending it back to get re-ground, so I will be able to try again soon!

Why don't you set up the die to size cases to the shoulder, for a shoulder bump, but in the front where the neck is, cut that area out and fit it for the "Wilson" type bushings so you can put the bushing you want in there, to adjust "bullet pull" or Neck Tension. You would basically be rebuilding your exhisting die much like Jim Carstensen, Larry Smart, Dwight Scott and various others did long before reddings "S" die came out.

Paul