pumping PCP cylinder into red zone decrease velocity?

[seamaster]

I pumped my Steyr LP10 cylinder into the red zone today. I noticed that pellet holes are somewhat ragged, not as clean cut as before.

Then I noticed the Crosman note.

http://www.airgundepot.com/benjamin-mar ... l-177.html

If you look at the note carefully, you will notice Crosman recommend pumping the Marauder pistol to 2900 psi, anything over 3000 psi will start to slow down velocity.


If this also what is happening to my LP10 when I pump it into the RED ZONE?

[RobStubbs]

I pumped my Steyr LP10 cylinder into the red zone today. I noticed that pellet holes are somewhat ragged, not as clean cut as before.

Then I noticed the Crosman note.

http://www.airgundepot.com/benjamin-mar ... l-177.html

If you look at the note carefully, you will notice Crosman recommend pumping the Marauder pistol to 2900 psi, anything over 3000 psi will start to slow down velocity.


If this also what is happening to my LP10 when I pump it into the RED ZONE?

If it goes into the red it's over pressured. I would advise relieving the pressure - fire it with no pellet or release a bit of air from the cylinder - red = danger. I doubt very much the mechanics of the crossman compare to the steyr regulator.

Rob.

[Tycho]

Don't know about the LP10, but with the LP5, overpressurizing it can kill the valve - instant reduction to 1 bar... Learned that when I switched from the Morini, where I pumped to 250 bar regularly.

[jipe]

Red means too high, you shouldn't do that.

Of course a little bit higher shouldn't be a problem, the pistol is designed with a safety margin (pressure can go above when for instance the cylinder is filled at a relatively low temperature and then moved to a higher temperature) but not a lot and you shouldn't do it intentionaly.

I think that the Steyr regulator was re-designed/improved a couple of years after the introduction of the LP10 = when the LP5 was not in production anymore but is it able to resist at 250 bar ?

The cylinders are tested at 300bar but again this is to have a safety margin, not to fill them at 300bar