Easiet way I know is to set up a bench that's solid and the gun solid and try to put first shot on the paper at 15-20 yards. If you are on the target keep the gun stationary and move the elevation and windage adjustments to center the crosshairs on the hole. It's easier with two guys. One keeps the gun steady the other turns the adjustments. This puts you right on. Fine adjustment for range is easier and you won't be out a lot of powder and ball and have a lot of frustration. It's called one shot centering and it works.
Rock Lock