Gen III G29SF was my first polymer-framed Glock pistol. I followed that with two Gen IV G20s and one Gen III standard frame G20. Of those the Gen III G20 felt best while being shot because of slightly thicker grip and less aggressive grip texture. My load of choice was HPR 180gr JHPs. It had four things going for it: full power, accuracy, little flash and shot to shot consistency. Interestingly enough the HPR 230gr .45ACP JHPs produce more flash. I expected the opposite would be true, therefore, I assume different powder is used in those two loads.