Questions on running on a pre-set HPA

-----Original Message-----
From: Mike Casady [mailto:cci@cybcon.com]
Sent: September 24, 2003 4:31 PM
To: Ray Peng
Subject: Re: Questions on running on a pre-set HPA

You need an input pressure of at least 750 p.s.i. preferably 880~900 (the normal CO2 pressure). Because compressed air does not change state like CO2 (liquid / gas) it is a more stable power source. However, compressed air has a louder sound signature and the internal velocity adjustments will have to be set higher to yield the same f.p.s. of CO2.

There are several things that change velocity. First is the internal velocity adjuster. When it is set it should not be moving during use. To check this, turn the velocity adjuster (9052) counter clockwise until it stops, that is the lowest setting. Turn it clockwise until you get it to the f.p.s. that the field allows or 280 f.p.s. which is usually the best overall performance setting. The nylon set screw (9049) in the bolt that puts drag on the velocity adjuster should prevent the adjustment from moving out of place. If the velocity adjuster moves, tighten the nylon set screw down slightly to put sufficient drag on the adjuster to prevent free movement. Now that the velocity adjuster is staying put check for the fit of the paintball. Paintballs are not all the same size some are smaller and others larger. The ones that fit the breech bore (where the paintball is pushed to when cocking) should have a static fit, (paintballs don't roll through the barrel). If you have small sized paintballs that roll through then a detent ring should be used to keep the paintball in the firing breech.

MC