Originally Posted by kawicivic
psi is a measure of pressure.... pounds per square inch... the higher the pressure the more air its going to use and the faster the gun will shoot (in FPS, not balls per seconds... bps). FPS is feet per second and used to measure how fast teh paintballs exit the barrel.
The PSI does not make your marker shoot faster, in terms of tanks, only in terms of pressure going into your marker. Just trying to get that clear. A tank with a fill capacity of 3000 psi, will shoot no slower than a tank with a fill capacity of 4500 psi. The only think that will really determine FPS is how much air you actally let into the marker, hopefully enough to make it shoot at the required or desired velocity, and if not you are experiencing shoot-down, or FSDO.
Feet Per Second D/T = V Just the measurement of how many feet a certain projectile travels in a given direction, time, and to a cartain distance, not just used in paintball, but used in many other applications as well.