Were the smokeless loads factory loads? If so, the problem might not be the powder. My "original" 92 Winchester has a .312 bore. Many, if not all of the "new" 32-20's have a .308 bore. Mic your smokeless loads, the bullets may be undersized for your "antique" rifle. If so, you’re stuck with shooting boolits. As they say, "Damn the bad luck". The best boolit I have found is an "original" Winchester mould that throws a 112-113 grain boolit. I've seen several on Ebay for less than $50.