For harder cast, as sized diameters are overzized by a bit and the paperpatching does the same thing with soft cast stuff. It's just a matter of fitting the cast bullet to the gun. Cast shooting can be esoteric at the very least as you can go through various/numerous loads long before you can get the one or two that satifies your accuracy and velocity requirements. In other words, it can be a major PAIN-IN-THE-ASS if you're not patient enough to wade through the folk-lore and use semi-scientific methods to get the good loads you need.