I am shooting a pedersoli 1874 that has room for a 2.129" oal case. My starline cases are not even 2.1". I bought some 45-90 that should show up in my mailbox any day.
I have read that the exact maximum might be too long and could stretch and curl during firing, cutting patches and increasing pressure. So obviously the 0.035 extra space I have with *-* 45-70 brass is too much, but how much is just right?
I understand there is a shortening of straight (tapered) wall rifle brass that isn't resized, just fireformed and reloaded. My plan is to anneal, trim, fireform (light smokeless load?), and final trim/chamfer before trying my paper patch BP load. Any advice on efficiently and accurately getting this right?
Thanks!
Radar