It takes around 15 minutes of shooting...for a shooter to get warmed up.
If you are fortunate to shoot at an open range: Butt a mettallic spinner plate up against a dirt backstop at 50 or 100 yards, so you'll have instant sight recognition of any missed hits. This will force you to have a "aim small miss small" kind of training. Start by shooting off the bench...and graduate to shooting offhand.
Here's to mountains of spare ammo!!!