MM fps on 400+ not lowering

[Chencho]

so, my minimag... took it to the field to chrono it, and it dont want to go under 400+ FPS.

Is it the regulator seat? you can see the shape of the valve and pin on it. Im ordering a O-ring replacement.

is there anything im missing?

thanks!

(just shot my first x-valve today... fell in love )

[Frizzle Fry]

Classic valve or X-valve?

Was it leaking?

[Chencho]

Classic valve or X-valve?

Was it leaking?

Classic MiniMag valve
was leaking down the barrel, changed powertube O-ring and leak fixed.

[Chencho]

Only the leak was fixed, still not going under 400fps. When I try the valve just doesn't pressurize

[BigEvil]

That is a pretty serious problem.. I would rebuild the entire regulator portion of the valve. New valve seat, valve pin, and spring pack. Also change the piston oring.

[BigEvil]

Do you have an aftermarket velocity adjuster on there?

[Chencho]

Everything stock, even spring in the powwetube.

So, buy the whole oring kit +spring and pin?

[BigEvil]

Everything stock, even spring in the powwetube.

So, buy the whole oring kit +spring and pin?

I would. Tell Tuna you need everything but the piston.

[Chencho]

I would. Tell Tuna you need everything but the piston.

Alright, will update when I get it.

If anyone else has more info I should know, plz post.

[athomas]

Only the leak was fixed, still not going under 400fps. When I try the valve just doesn't pressurize

If it doesn't pressurize, it is generally an indication of bolt stick. Since your mag is original with the powertube spring, I suspect you need to install a powertube spacer that is longer than the spring you are using now. If you know someone who has a mag with a level 10 bolt, get one or two of his shims and use one at a time to see if they help.

A bad regulator seat oring will cause a high pressure in the front chamber which will result in a high velocity. Usually, the valve will vent air out the back when this happens.

I would change all of the orings as a start anyway so that you know what you are working with. Most mag problems are due to a bad oring.

[Chencho]

About finding someone with another mag... When i got to the field players were like "wow, where you got that?!" Lol

I know someone with an xvalve, that's about it. Will change all the rings and eventually buy a slavery kit. I'm waiting to come back from the trip I'm going today to drop the money.

Thanks for the reply :-)

[splatzone]

What's up

[Chencho]

Sup splat, trying to get my lil one fixed to go back in the field!

[Spider-TW]

If it doesn't pressurize, it is generally an indication of bolt stick.

What are you guys seeing in "doesn't pressurize"? I don't see how it lacks pressure at 400 fps.

[Chencho]

When I turn the back screw counter clockwise to lower the fps it just "shuts down" it doesn't cock back.