FX Fx wilcat mk3 problem with power

[alcuerna]

I have the compact tube model and it is only 1 regulator

 

[Trucker3573]

Yes, but I have noticed that it is only consistent without losing any speed if I adjust the hammer to 920 fps so it does not vary much, only 4 or 5 fps when I stop shooting if I adjust it to 880 then the speed drops if I stop shooting for 5 minutes it drops to 860

Completely normal. If you want better performance at 880 you need to drop reg pressure a little and retune. The wildcat/maverick platform does not drop very far below its peak tuned spot (yours with the current reg pressure seems to be 920 fps) and still maintain a super consistent shot to shot speed. You have a bit too much reg pressure for it to perform at its peak level with an 880 velocity.