well, yes, they would work, but I would imagine that you wouldn't get a very good capacitance cos think of the area of the stuff that is NOT in contact with the glass. Surely you would get lots of "hot spots". Richard. -----Original Message----- From: Tesla List [mailto:tesla@pupman.com] Sent: Sunday, May 28, 2000 12:14 AM To: tesla@pupman.com Subject: Re: Better bottle caps Original Poster: Mouser25@aol.com would copper bb's work for a bb gun?