This could be a sweet idea. I wonder how far molten bb's would have to drop.
Your biggest hurdle would be to get the bb's to form the correct size.
http://projects.nfstc.org/firearms/module05/fir_m05_t05_03.htm
Your biggest hurdle would be to get the bb's to form the correct size.
http://projects.nfstc.org/firearms/module05/fir_m05_t05_03.htm
Doesn't seem like it's an exact science...