I have an old “CRONY”, and here are some results of  WW 135’s through my G34 Glock (5.25” BBL). I know the results are somewhat different than others.
1078 fps 5.8  g HS-6
1036        3.6  g Tight Group
957           3.2  g   ”             ”
956          4.0 g  Auto Comp
1065        4.5 g  Auto Comp
1163          5.2 g  Auto Comp
959          4.0 g  CFE Pistol
1053         4.4 g  CFE Pistol
P.S. the G34 has a 10 # recoil spring, all locked back the slide last round.
I don’t care what the power factor is.