I hope u can help me with this proble. my G27 jams once and a while. I hae about 1,800 rounds thru it. Its a gen 3 G27 born about 1/2011. for range ammo i use only speer 165 TMJ and winchester 165 BEB. It happens with different magazines, with either the stock floor plate or an extension. Sometimes i can go thru a range session and shoot 200 to 250 rounds on other days i will shoot 2oo rounds then hae a jam. it happens on the 6 or 7 round. the jam is the fired case does not eject from the chamber and the following rounds tried to feed into the chamber. not sure what to do.