A cowboy load for a Mannlicher, a Mauser, a Carcano, and Enfield, a Mosin Nagant, a SKS, a Kropatschek...? I DON'T THEENK SO!
I like my cowboy load for a Martini Henry. Fill that huge honking .450/.577 cartridge (THE original BOXER primed round) full of black powder and blast away!!!