Don't hit some hard headed idiot with your gun. You could break your gun.
Trying to start a fight? Ignore him and/or leave.
Punching? Use empty hands, OC, or get outta there.
Swinging a bat? If you can run, then run. If not, get your gun out, but don't waste time hitting him with it. Shoot.
+1 Joab. Deadly force is deadly force.