Checked the speed of my new 2300S.
With the first screen 2 feet from the muzzle and with 7.0 RWS Basics with adjuster set full CW...520fps
With a new CO2 cartridge I turned the adjuster 2.5CCW...475fps
That feels real good to me.
I will shoot 7.9cpl so I expect the speed to drop to around 450fps..