I've got a S&W , N frame, 8 round, 327 TRR8 from Performance Center and I use PMC 357A rounds. The S&W provided TK moonclips will not accept this ammo casings. Even using a wrench would not work in a BMT N38-8 mooner/demooner. I probably have to change ammo type maybe the Sellier & Bellot 357 mags will work with these TK clips from S&W. Anyone know about these type problems and solutions?