CVA EXPRESS double barrel 50 caliber rifle

Shockey gold 2f waterproof black powder on a 50 caliber CVA 50 caliber double barrel Express rifle I've had it loaded for a year-and-a-half to two years to see if it will still fire and it shot great Jim Shockey gold 2f and 3F is a very clean burning black powder substitute for whole lot easier to clean and a whole lot less smoke it is the only powder I recommend and is definitely only powder I will shoot.