Well, excuse me for playfully calling it a terminal donut. Not a donut. Actually it was just excessive neck wall thickness in the terminal portion of the neck. N-2 diameter at case mouth was greater than N-1 diameter at shoulder juncture with a bullet seated. Just the opposite of a donut. Same problem as you have. Same solution I had, send the brass back to QC so as not to have to do the laborious neck turning.
Ron aka "Rip" for Riflecrank Internationale Permanente NRA Life Benefactor and Beneficiary .458 Winchester Magnum, Magnanimous in Victory THE WALKING DEAD does so remind me of Democrap voters. Donkeypox.
