Greetings, I'm new to this site and have really enjoyed reading all the information that is shared here. I have a Southern Mountain Flintlock by TVM (Matt Avance). It has a 42 inch swamped .50 cal barrel with the round grove rifling and 1 in 56 inch twist. I'm working up the most accurate load for the rifle and have found it. Let me first say, I have done a good deal of experimenting with various brands and granulation sizes of powder, various sizes of round balls, different thicknesses of patching,etc.. So to make a long story well... longer- What it likes the best is 66 grs of Swiss 2F with a .495 RB, the patching material is around .015. The question is do you guys think the 66 grs is sufficient enough to take Whitetail deer out to 75 yds? I like to hunt in and around pretty thick cover so the majority of my shots are 30 to 40 yds or less. But one never knows when a longer shot may present itself. I'm one of the guys that would prefer a pass through shot to get as much blood out of the deer as possible for tracking. I also understand there is no given answer or result of what a ball will do when it strikes a deer. I just want to be sure that it's packing plenty of punch. Any opinions would be appreciated and I've also heard that Swiss powder yields higher velocities.