tac 1 velocity problem

[klutz]

I'm looking at a friends Tac1 because he can't get the velocity bellow 380fps.
I readjusted the lvl10 per the install instuctions.
Took apart , cleaned and relubed the valve.
Changing the velocity adjustment seems to have almost no effect.

[JRingold]

Is the chrony correct? When you shoot over another Chrony is it reading the same? When you shoot another marker over it does it read correctly?

Tac-One, so X-Valve. Is the Level 10 adjusted properly, right carrier, right spring? Is the paint too large for the barrel?

I'm just going through anything that I can think of that would effect the velocity. When I installed my first Level 10, I had a similar problem because the barrel I was using was too small for the paint, so it wouldn't shoot if I turned the velocity down

A velocity that is too high even when turned down, indicates a bad regulator seat oring.