As for the old 22 smiths, ive never owned one. I suppose it bothers me less on a rimfire cartridge compared to a centerfire. I wouldnt say i have a beef with frame mounted firing pins... the pythons have one as well.... I just prefer a hammer mounted firing pin. I tend to take maybe too much advice from my gunsmith...hes been smithing for 40 years. Most of my opinions come from advice ive gotten from him.