Tuning Need advice with my impact mk2 pp 0.25 call 600mm barrel.

[voske]

Hi guys,

Been shooting with the impact for 2 jears now and never had problems.

last month or so groups started opening up, took the gun in for service and had some o-rings gone bad in the reg.

Got the gun back and retuned the gun to 130bar for 880 fps for jsb mk2.

After 2 weeks the same thing is happening and groups open up. 

Reg pressure is swithing between shots from 110bar up to 130 bar.

Checkt with a digital pressure gauge.

Any ideas what the problem could be?

I have a huma reg on the way .

Thanks in advance.

 

[Vetmx]

I would replace the whole reg also. The seat it probably bad.