i have a black diamond and love it .i use 110grains of pyrodex powder and shoot hornady 240 gr xtp.they are awsome and i shoot dead on at 125 yds and 2 inchs high at 50yd .i use the muskett caps and have never had a problem withthe gun ,i am a user of guns in that i feel it is a tool and i use it i am not anal about cleaning it and keeping it pretty so if i can get it to group any body can ,one thing though is to try to be as consistent as possible in the loading in how many taps on the stocks to seat the powder and how many flicks onto the measurer and so forth it does make a diff,