R/T Mag shootdown trouble

[g3750]

My friend has an R/T mag fairly new
The marker has flatline setup 700+ psi
the gun shoots fine for about 4-6 shots then has major drop off and the bolt no longer recoils
If you leave the gun alone ofr a minute or so it is back to the shoot fine a few shos then shoot down again.
The flatline is new to the system.
To test we took off and went back to preset N2
same issue with drop off.
R/T X valve was AGD installed as well as parts on gun

[athomas]

I'd say do a good cleaning of the regulator and internals of the gun.

[g3750]

yeah we did that. Found the problem there was a sliver of metal in the valve body. Gun shoots grea now.

[athomas]

Yep, a piece of dirt is one of the major causes for fluctuations or erratic behavior in a mag. That's why we always recomend a good cleaning before all else.