Hello gungadoug,

You are welcome. Yes, the W. Richards is a 577/500 No.2 BPE. Its almost a twin to this rifle, except it does not have rebounding locks and has a wedge forend. (see the link for more info)

http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=329134#Post329134

I have an adjustable mold so I can make bullets from about 300g up to 550g. I use 5/8" dia foam Baker Rod, about 1-1/4" long, for filler.