When loading 9mm on my 650 using Dillon dies, about 5%-10% of the sized cases will show a thin ring of brass about 1/8" forward of the extractor groove. I call them the "9mm Belted Magnum." Apparently, the Dillon die is so tight that some of the brass won't squeeze into it and bunches up ahead of the carbide ring. Usually, the ring is minor enough that I would feel safe shooting the round. But since I can't be sure the same case won't be weakened by repeated "ringing", I've been shooting them once and tossing 'em. The problem is not restricted to one brand of brass, and the guns used have been two G-19's, two Browning Hi-Powers, and a few misc. I called Dillon and they didn't seem concerned about it, and specifically told me not to adjust the sizing die upward a little; that could lead to cases that won't chamber. Experience and suggestions? Thanks.