Tuning My FX Impact MK II STX w/PP 600mm JSB Diabolo Exact Jumbo 15.89gr Tune

[RunningBull]

Hammer Spring Preload - .838”

Power Wheel on MAX

Regulator - ~80 BARs

Valve Flow Control Knob - <3rd line or .318”

958 - 960 FPS



This tune is producing good results at 50yrds 1/2” to 3/4”. I’m sure there are better tunes but this is working for me.



Please share your tune for the JSB Diabolo Exact Jumbo 15.89gr

 

[Birdslayer]

That’s beaming. Fx impact are freaking awesome guns. I’m actually trying to sell my though. I’m gonna get a small compact gun for a woods walker.