I used a 42" Getz barreled .40 flintlock for years, 40 grns 3f for squirrel and 70 for deer, Forty is legal in KY and I killed many deer with it, all clean kills, all double lung at less than 50 yards. My friend and I were hunting the late (Dec) season on the primitive hunting area off Cave Run lake, he was using a flintlock 40 and took a shot at a medium sized buck at about 35 yards. The bullet hit a 1& 1/2" sapling he hadn't seen. The buck had been very close to it and the round ball had hit the sapling straight on. That shot was a double lung with no exit wound and very little external bleeding. That was a canoe camping trip with primitive tent, super cold one night with a skunk at the flaps at 3:00 am. Would have been serious situation if it had sprayed us as it was zero that night.