I shoot targets with a Vetterli that I converted to centerfire.
It has a .429 bore that is in perfect shape.
For bullets i cast them from a Lee mould meant for the 44 magnum. It weighs 310 grains.
I make my brass from 8mm Lebel brass.
Lee makes dies for the 41 Swiss.
It's a fun round to shoot, low recoil, accurate enough to keep me interested ( 3" 5 shot groups @ 100 yards), rainbow trajectory and of course the funny looks you get from others are priceless.