FX Tuning FX Impact M4 35 cal

[Hunter 07]

Tuning the M4.35 cal.

just installed .35 caliber on a new FX4.

M4 is now shooting Fx slugs 68 grain at 850 FPS.

The Tune is Micro 4.7 and Makro 14 .Valve 4. Reg is at 110 bar.

Please advise.

Thanks.