IMHO Black Diamonds are accurate rifles in spite of a mushy trigger and a long "lock-time", as the sliding striker travels forward a long way before slamming into the cap or primer.
The quick load feature is a convenience, but this idea actually shortens barrel rifling length and therefore will have a negative effect upon velocity. For that reason, I would go with the longer barrel of the XR models.
I would also recommend the stainless steel Black Diamonds.
A big negative is a total of seven parts to juggle during cleaning plus I also always have to take the stock off when cleaning.
Also, with a scope installed, you will want to use a 1/4 inch drive socket wrench with a long extension and socket instead of the crummy TC supplied tool to remove the breech plug.
I haven't yet come up with a good method of quickly putting a cap on the nipple.
But, I have killed two deer with my .50 cal Black Diamond topped with a 3x9 scope, each at 140 yards.
So, It will shoot.