Interesting information

[browningautorifle]

When you use a champagne bottle or even your issue melmac plate for the base, the explosive turns whatever the core is into the slug. That was standard training for the demolition instructors...and pioneers... We all studied that. Copper isn't required. As stated almost anything as long as it gives you the cone shape. You could spend time dishing out tin cans and get the same effect. Then guntape three steel spikes to the bottom for legs to give it the standoff and fire from outer space...