Well ...... HI CLIFF
I do have an additional. Nothing to do with RCBS Cowboy Dies though. Just loading and reloading 44-40 and 38-40. Lever Lustrum ago when I actually shot Dash Calibers, I found for MY own experience, using the combo dies, that seat and crimp in one pass of the ram were a quick path to disaster. Buckled and crushed bunches of cases. Switched to separate Seating and Crimping dies and those problems went away.
I must confess, I no longer shoot, load nor reload Dash Calibers. I do however, use a pile of 44-40 cases in my 45 Colt chambered guns. Seat 452 bullets innem to eliminate Blow-By. So, again, this missive actually contains no additional goodies for the OP, thus I won't feel bad if the OP skips these little tie bits. Anyone else trying to mitigate blow-by in the 45 is welcome to read my little tidbit. Oh, I do however, recommend running your 44-40 cases through your 45 Colt dies BEFORE trying to seat a 452 projectile.