800 mm barrel 25 cal impact velocities

[Airgunmann]

I installed a 800 mm barrel tungsten hammer and opened up the ports on the valve and block non power block impact M3 I maxed out the front reg didn't have a way to bypass it here and set the rear to 180bar 250 bar fill 44 gr h&n slugs running 1000 fps for about 25 shots the last 4 drop down to 990 power wheel on 8 and micro on 4 valve up front opened up all the way and a slug probe should I be getting more velocity or shots it's 250 bar 580 cc tank or maybe I need to open the block up some more ?

 

[Airgunmann]

Any one out there with a M3 25 cal power block 800 mm just curious of velocities

 

[Centercut]

At 98 FPE you’re lucky to get 25 shots. My .25 Impact with 700mm barrel and 87 FPE gets about 26 or 27 shots from a 250 bar fill and 580cc bottle. I think I remember Dubber saying he was getting under 20 shots in .22 with 40 grain slugs at 1050 fps.

 

[Airgunmann]

I didn't think it was to bad just wondering if I should be getting more or a tad more speed picked up about 80fps with tungsten hammer and 800mm. Maxed out was 103 fpe and over 1000 fps but I wanted him get at least a magazine before refill