You don't say what alloy you're using. How hard are those bullets? My own Marlin 1895 will do that good or better with that same bullet and load, made from air cooled wheelweights and gas checked. But if I want to make them from straight lead for hunting then paper patching is the only way to go for accuracy and to not lead the bore. I did end up cutting the gascheck shank out of my mould, mainly for that reason. If I load them light it's not needed, and loaded heavy I paper patch them and again it's not needed.
If you really want to see some destruction, cast some of those out of pure lead and drill them for a 1/8" dia. or so hollow point. Exit holes the size of a softball and nothing much left inside. Yuck!