Retro Leak

[Cobrachs]

I have a retrovalve that was bought used. It worked fine for a couple of months and now it leaks out the velocity adjustment hole. It is a preset tank at 850 psi, I don't have the velocity to high, I replaced the reg piston oring and greased the reg piston and spring pack. If I shoot it stops but after sitting idle for approx 1-2 minutes it starts to leak again. The velocity is a little erratic but I have a cheap chrono. Thanks for your help

[Muzikman]

Call AGD and get a new reg piston. Since you said you already changed the reg piston oring, the reg piston itself would have to be bad.