What you guys never taped a marble to the base of a 12 gauge shell and threw it to a concrete surface? One of the guys I grew up with in a small town did it all the time. Same for hitting a 22LR in a vise with a hammer during shop class. I never did anything silly like wasting ammo in that manor. I was much more of filling balloons with a oxygen/acetylene and shooting them with a tracer type kid.