I have one of the TC Black Diamonds the was between side locks and more modern in lines.Kind of a bolt affair,but the 209 primer was not cover when cocked. It is marked as magnum and could take 150 grs of loose powder, I never got enough courage to load it like that. I used Pyrodex and then777,but they both get funky if let set from one season to another so I went back to black powder when using it. I was swabbing between each shot with 777 and do the same with black powder
Shelf life, is the only problem I have with 777. Don't like Pyrodex. Black is just plain hard to get around here.
