I've got two .54's right now.. both in flintlock that I'm dying to take hunting. I've got a 40 caliber that's not legal here for hunting, but is fun to shoot and have several 58's.. one I just bedded today with the .54.. both are green mountain drop-in at 1-60 I think they are.
Locks will be L&R for the two flinters and my two Thompson 58's as well... not sure if I'm going to invest another $100 in my investarms... but might just to get it over with....
I've hunted with 50, 54, and 58 so far... and I've got to say... they all kill deer and goats, I've only shot pigs with the 58 so far and so far none have been able to take a step. I've not dropped anything with either the 54 (mouflon) or my 50.. but none went too far and none escaped recovery... but the 58 is truly amazing for a gun without "creds"...
I've a buddy shot a nice 80 pound pig with half a load of birdshot and 72 cal round ball I think it was... it was a bad hit with the 72, but made for a pretty sick little pig that he finished off with a load of 6's from about 8 yards.
Aloha...