FX Maverick Valve Question

[F5shooter2000]

I have a .30 cal Maverick.
It’s been shooting great. However, all of a sudden my velocity is only around 600 FPS.
The gun has been shooting around 881 FPS very consistently.

The adjustment wheel is correct, the fine tune hammer preload adjustment screw is correct.
The cocking mechanism is correct.

Could it be valve travel? Does anyone know what the valve travel should be?
I have about 3.5mm of travel.

Thanks!

 

[Keyman62421]

Sorry I just got around to reading this I guess no one's answered you. first does the gun sound right to you ? Does it have a big pop going on or anything like that ? second, are you sure that your Barrel hasn't moved and your transfer point is out of place?

 

[Feinwerk]

Good call @Keyman62421 , at first I was going to say regulator creep/valve lock, but if this gun has an adjustable transfer port with a rotary wheel then that is the simplest thing that could go wrong. Check to make sure that the transfer port wheel has been turned exactly to one of its detents and not in between somewhere.

Let's see, what's another simple problem - a blown out or missing breech O-ring perhaps.

Feinwerk

 

[tor47]

The first thing I can think of is that the breach O-ring is not sealing properly, and need to be replaced

 

[F5shooter2000]

Thanks , it was a breach seal.

 

[Feinwerk]

Thanks for closing the loop, glad it was a simple fix