My Daystate BlackWolf TAC .177 HP with the VoluMax added will push 55+ FPE, but shoots lights out with the JSB KO 13.43 at 1003 FPS and 30 FPE 👍🐺🎯 Red spring, 95 bar on the regulator and power wheel on minimum 👍😃 A lot of shots per fill on a 700 cc bottle 😃