I' ve got a TC Black Diamond that I can' t get to shoot any better than 8" or 10" groups at 100 yards. I know these guns have a better reputation than that. It' s not me. I' ve benchrest shot for years and have shot rimfires, magnums, other people black powder rifles, etc. I' ve tried from 100 grains up to 150 grains of Pyrodex and Thompson sabots and Hornardy sabots with a Hornady 180, 200, and 240 grain 44 magnum bullets. I finally settled on 100 grains of powder and the 240 grain Hornady sabot, but I' m still looking at 8" three shot groups at 100 yards.

What loads are other Black Diamond shooters using?? I guess there' s a chance I just got a bad barrel.

My normal procedure is to wipe the excess bore butter from the bore before firing the first shot so my barrel is as clean and dry as possible. I' ll then clean with wet patch then dry patches after every third shot.