I have been shooting all my life, as long as I can remember back, I am 63 in September. but it was rimfire and centerfire and cap locks, I have killed several deer off hand at 100yds and beyond off hand. when I started with flintlocks it was a whole new ball game. and I was embarrassed! I had to learn not to flinch, something I did not do with modern rifles. what helped me and stopped my flinch problem with off hand shooting was I would put it in my mind when I touched off the trigger not to move until I counted 3, of course I can't get 1 counted before the ball has left the barrel. since I started doing that no more flinch. and I have had flash in the pan I do not move. it worked for me,,,,,,,,,,,,