Sr. Yeager is right: it doesn’t really matter what kind of target you shoot at. That said, if you’re shooting for self-defense, make sure to check your group size (rather than ultimate accuracy). If your group is smaller than your hand you’re not shooting fast enough. If it’s bigger than your hand you’re shooting too fast. More than that, have someone call out a part of your target. Moving from target to target (no shoots are vital) improves your gunfighting abilities a hundred times more than itty bit groups. Now then, what targets do you use when you’re at a square and/or outdoor range?