We shoot 1/2" steel (AR500) silhouette targets at the clubs to which I belong. The targets have 2.5" holes, with steel flaps on hinges. Great fun at 200, 300 yards or more.
We like to play games.....one of us will shoot the flaps open as quickly as possible, the next will shoot them closed, etc. Or, working in teams of two, one will shoot a flap open.....his partner will fire just a split second later, to catch the flap just as it swings open....and close it. Requires timing and skill.....but loads of fun.