I used to belong to a club in VT where we often shot at a full sized buffalo steel target at 500 yards as a tie breaker on our trail walks. Most everyone used patched round ball, and once you got the range down, you could hit the buffalo pretty regularly. I recall, that I had a spot on the hillside in the back ground behind the target that I used as a aiming point. I swear that I was aiming at leats 50 feet above the target, but I am only guessing. If the wind wasn't blowing, I could hit that buffalo 6 out of 10 times.