Ed..I have read WW Greener The Gun & its Development at least twice,& can't remember anything to do with that.
Unless folks who didn't clean their bbls noticed a wider swath as the pitting developed..????
why wouldn't you just use some banged up, out of round type pellets (rejects) ?..instead of messing with the bores...it would do probably do something similar.
Kinda like that "Square/cube " shot thing a few years ago.
Though I like the last bit of the muzzle roughness idea, of retarding the shotcup, & letting the pellets fly out on ahead...
Joe...is that idea used/&/or accepted to work???..seems like it could/should
franc

Last edited by Franc Otte; 09/17/13 01:51 PM.