Board Thread:Off Topic/@comment-26397825-20170410034737/@comment-26397825-20170427125815

If the damage is dealt with a bullet and not the barrel or butt of the gun itself, then it does not add to the strength.

No, it doesn't work if they hit themselves.

Yes, it must hit hard enough to count as actually causing damage. So no pokes here unless it would cause damage just as poking someone in the eye or directly attacking a pressure point.