Gun info: 2011 open gun. 5" OAL KKM 9mm bushing barrel with D2C cone comp.    Load info: 7.1gn Winchester Autocomp, mixed headstamp rollsized brass, ginex small pistol primers, PD 124JHP v2, 1.170 OAL.   See picture for chrono data.    Is this OK? I'm used to 9 major being under 1400FPS. But if I go lower then 7gn FPS drops quickly. 6.8gn only gets me 164PF.