Recent content by Frank4889

how are your first shots after letting your gun rest for some time. that is my biggest problem with my impact. My first shots are usually allot lower than my set extreme spread.

low 900's to high 800's fps

Anyone have a low power tune for a .22 600 MM Fx Impact M3 shooting NSA 23 Gr Slugs. 

I have Loctite on it, will mark it with liquid paper just to make sure. Im pretty sure this all started when I installed my power plenum a few months back. Just remembered, I can only hear the power plenum fill every other shot. it will fill on one shot but not the next. every time. 

Could a bad Oring say C39 cause this. A friend told me it could but if it was bad i should see a leak or reg creep or something. Just thinking outloud. 

Thank you all very much for your help. Will check the C1 and C3 as well as the hammer screw again. Will reach out to FX USA for help aswell. Thank you. 

Good day all, I have an issue with my FX Impact Mk2 Power Plenum. I have tuned it numerous times using all the techniques available. I can get it to were it is extremely stable with very low fps and sd, The thing is the gun will shoot well that day but if you let it sit for a while it will...

Man your info was spot on, i tuned like you said and its not budging. Waited for a half hour and tried again and it was literally spot on first and second shot. I am shooting the 26.8 Nielsens at these velocities and getting awesome results. You cant imagine how much i appreciate the help...

Where do you start off your valve adjuster?

Man really appreciate the input. Ive been going crazy over this issue. My reg keeps steady at 90 Bar which is where i usually leave it. I guess i will hace to re tune the gun. What i was doing was locking up the hammer tension and increasing reg pressure till i got the fps i wanted, once i had...

Hi everyone, I have a .25 MK Impact Power Plenum, i can tune it to where it is extremely constant but if i set the rifle down for 5 minutes it will drop 10 fps from my standard tune, if i let it sit for an extra 10-15 minutes after that shot it will go down another 10-15 FPS. after 4-5 shots...

That is correct, i was wondering which of the two liners shot the 34 grains better. 

I am thinking of buying a superior liner but cant decide in which one, has anyone shot the 34 gr Nielsens with them and if so which liner has grouped better and at what fps Thank you. 

Mu accuracy has been pretty good too, but it bugs me as to why i keep getting those odd changes in velocity so far from my average. 

I have, its jeeps pretty stable mostly but still get that odd high or low reading