Well I tried the RCM 80 Degree LP in my PTR 9KT clone and it would shoot 126 fmj fine, but 147 gr SuperVel Subsonic (900 fps) and 150gr Federal 150 Gr syntech shot once then the bolt wouldn't go back or the next round would jam in the bolt. I switched back to the 100 degree LP and the 147 gr Supervel shot with no problems. The bolt gap with the 100 degree is about .018 to .019; very tight with the .020 gauge feeler and ok with the 45mm guage. Is it ok to use the 100 degree LP or what should I look for as in damage wise on the pistol. There was no marks on the rear buffer.