phantom's velocity unreliable?

[hockey star]

does the phantom's velocity tend to lower itself after a while. also, how could you prevent this from happening?

[weetodd]

If it's running on 12 grams then it will lower as the catrige losses gas.

[hockey star]

so if I'm using my 16oz or my 9oz, the velocity wont lower itself?

[weetodd]

I don't know co2 is pretty inconsistent. It would be more consistent than 12 grams though.

[hockey star]

actually, I'm asking if the velocity set screw loosens by itself, therefore lowering the velocity. do you know if this is true or not

[zenmaster]

it can, since the nylock screw will wear itself down over time, or if your gun is an older one w/o the threaded hole

[coyote]

I shoot mine on air...

I dialed it in real good about 2000 rounds ago. Ever since it has shot about 275 over the chrono.