Double Gun Journal Vol 8, Issues 2 and 3, 1997 and Vol 14, Issue 1, 2003

You'll need to cut and paste this and put in your address bar - it will take you the thread from 2006
http://www.doublegunshop.com:80/forums/ubbthreads.php?ubb=showflat&Number=6394&page=1&fpart=2