10 grns unique should work fine, smaller rim s/b fine, smaller base s/b fine. As far as the 16 bore I would be looking up Tinker here on the site & drop him a PM as well as Daryl and I bet they can tell you all you need to know. Might also be some info in Roger Lake's Paradox book.

m-4

Last edited by m-4; 07/06/12 07:05 PM.