At the range both hearing and eye protction, hunting alas I am a sluggard and sometimes will have eye protection if I remember my glasses. If I can't hear, I woun't be ready to shoot.
The post about matchsticks got me to remembering my experimentation with small rifle primers, they too fit in a BB barell (.177) and if your shooting fast enough at something hard enough, they explode on impact. Dad must have looked for that brick of primers for three days before giving up and buying another. Alas I didn't wear eye protection back then either, and ended up at the opthamologist having metal fragments removed from my left eye lens. Dad still wonders to this day how I managed to get that metal in there, he thinks I was playing around with a grinder and the old steel pile out back.