I was curious about what a “cast booster” was. It turns out that it is used a a primer for ANFO, Ammonium Nitrate Fuel Oil, based explosives.
Interesting, No?
Yeah, a blasting cap does not have enough energy by itself to reliably set off ANFO. I got some strange looks for happening to know that off the top of my head after the OKC bombing.
*shrug* What can I say, I’m an idea sponge.