I have two .50 caliber blued percussion 1-28 twist, one being a 21 inch carbine. I have two .50 caliber flintlock barrels, one being a carbine. I have a .54 caliber blued 1-70 twist percussion. I have a .58 caliber percussion. And a stainless .45 caliber fast twist and a .50 caliber stainless fast twist. I sold the .62 smoothbore.
I really like their barrels. I wish I had purchased all flintlock barrels but I like the percussion also. Its just lately I have gravitated to the flintlock for near all my shooting.