RE: 50 yard test target, .73 cal....
270 grain ball-ets in my Knight Wolverine LK-II shoot incredibly accurate. I only use 80 grains of Goex 3f and no wad, but out to 100 yards I have no doubt that these things would be an excellent hunting projectile. I've shot off my supply right now, and need to order more as I like playing with them. The 245 grain ball-et also shoot well, but not near as good as the 270 grain.
I was turned on to this load by a person I know. We got talking muzzleloaders one day and I was surprised that he hunted with one. He said he bought a Knight Wolverine many years ago and some 270 grain ball-ets. He said he shoots two deer almost every year with them and has never lost one or really had to track very far, as the ball-et goes right through and leaves an excellent blood trail.