Velocity problems

[Sniper Steve]

I am working on my friends mag it has a xvalve with level 10. with the gold spring with it turned all the way up it shoots around 225 with the red spring the best I can get it to is 265 and it wont shoot with the silver spring. because I have never had a velocity problem with a mag this is a new problem for me does anyone have any other suggestions, the valve and all orings look to ge in great shape, almost like new.

[Patron God of Pirates]

When you say turned up all the way you mean as far as it goes without venting from the rear right? I've seen this twice.
Case a) Needed new reg-piston assembly
Case b) Tank output was in the 550 range (should be 800 minimum with LX/RT)

[Sniper Steve]

Yes all the way in and not venting, not the tank it is a 1100psi out put tank, and I can try the reg piston.

[need4reebs]

what set up are you running? how much air is in tha tank being used? does tha valve have velocity problems when used on a different mag?

[Sniper Steve]

ptp micro emag does the same in e and mech mode, 1500psi or better every time I have tested it, and I was going to try switching valves but first I have to adjust the level 10 in the other valve before I try that.

[Sniper Steve]

Ok I have tried the valve in another gun and it works fine and I have tried a different valve in the gun and it is shooting low. so it appears to be the gun, how can I change the gun to fix that problem?