Anyone have experience with the underhammer rifles made by this guy? I have one in 20 bore (62 caliber) built with a brass receiver. I am told it was the only one he made with the brass receiver.

The barrel is made with "Forsythe" rifling. It seems to shoot pretty well - just kicks like a mule.

http://www.muzzleloadingforum.com

Some of the folks over there have them!

I have one of his 8 bore's and one of the 12 bore's, fun guns both