Question

[ross * pilot]

Like earlier said, im having some trouble with my gun because whenever i shoot blanks, it jack hammers. Should i higher my psi or use a stronger valve spring? its at about 280 psi

[08Lud08]

I think that usually normal for some people I think I remember reading somewhere the paintballs provide enough back pressure when its fired for it to re cock correctly.

[ross * pilot]

any ways to prevent it?

[Halucin8]

if your gun is efficient enough it may do this without paint. I would also make sure my striker oring is lubed and put a couple of drops of oil in the asa and dry fire a ew times. If still happens you will prolly need to raise the input pressure of your marker.

[druid]

your psi is too low. Increase it to around 310/325 psi and try again.

[MVS1]

Originally Posted by ross * pilot

any ways to prevent it?

I took my stock barrel and with the exception of about a 2" section of vent holes packed it with rag to help reduce noise. A fringe benefit was the back-pressure it created is considerably more than you would get if you where shooting regularly. Leave some of the vent holes on the barrel open so your gas has someplace to go. Give it a try, it will most likely be enough back-pressure to allow you to dry-fire your marker without having to adjust your reg up.