I have a .54 GreyHawk. I picked it up for $100 "used" unfired. Best 100 bucks I ever spent. It has a 1:48 twist with percussion. Shoots PRB very well. The first 3 shots out of it ragged a single hole at 40 yards. My bro-in-law shot the 2nd shot, so I know it has to be the gun. :thumbsup: I got a buttonbuck with it this year at 65 yds. Hit exactly right where I aimed, and I had to shoot left-handed. My son is never gonna let me live that down. :shake:
I wish it had a wooden stock, but, you can't have everything.