I was with a bunch of friends one afternoon shooting muzzleloaders. They all felt they were some great shots. So I went in the house and got some 3x5 index cards in different colors. I taped them to the box and set the box at 25 yards is all. I then told them to shoot for the center of the card and we would see who got the best group.
What will surprise you is, how many of them miss the card at that distance. Try it sometime. I know I have to start to shoot more off hand. If you do not, you can loose a lot of your talent doing it.