Got a tech at my local field who calls me when he gets mags in...
Guy brought in a couple of guns with xvalves... Scott told me when he aired one up it vented out the back and blew a bunch of old lube and crap out of the velocity hole...
When I read that I thought "bad piston"... we oiled the gun and lubed the springs in the back of the valve... and the next time we aired it up there was no venting...
But then we took it to the chrono... and no matter how far in or out we adjusted the velocity... it stayed at 325. This was with a standard input tank (800 PSI)... it was maybe 100 degrees out...
I was thinking maybe the piston wasn't ruined/worn out enough to leak... but that maybe it was still not quite right and was effecting the velocity... I just can't wrap my brain around what was going on... the air chamber should be increasing or decreasing as we change the velocity screw... so how it velocity not changing?
Let me know thoughts.
Thanks.
Armando