Jan 31, 2009 #1 FOTIS Range Officer Staff member Oct 30, 2004 24,396 3,330 http://www.rathcoombe.net/sci-tech/ball ... thods.html Found this very interesting.
Jan 31, 2009 #2 JD338 Range Officer Staff member Nov 4, 2004 25,498 9,410 Good read Pop, thanks for posting! JD338
