Kitch,

Crossfireoops' technique does work, but another option is to stretch the .45-70 cases. Buffalo Arms sells a very reasonably priced case stretcher made by Tim Smith-Lyon. The price is $39.95 + shipping. Here's an article that I wrote on the subject that you might find interesting.

http://www.texas-mac.com/Stretching_Short_Brass_To_Fit_Your_BPCR_Chamber.html

Wayne

Last edited by texasmac; 10/22/14.
NRA & TSRA Lifetime member. NSSF member. Author & Publisher of the Browning 1885 BPCR book.
See www.texas-mac.com