According to COTW, base diameter is .850, rim diameter is .925.

I load Alcan All Brass hulls for my 10 gauge guns and have made a sizing die for them. I also use a MEC SuperSizer in 10 gauge as needed.

Mike

Last edited by skeettx; 05/19/13 08:36 PM.

USAF RET 1971-95 [Linked Image from jpgbox.com]