Completely new

[Cronic]

Well maybe your barrel isn't straight and it hits a curve and then flies in a curve.

[longshot1068]

paintballs have a tiny seam on them, with the spinning of the paintball and the air moving over the seam as it flies the paintball will tend to curve a little. the bigger the seam the more it will curve. Also if the paintball is a little out of round it will fly funky as well. Any projectile that isnt subjected to rifling and isnt shaped like a bullet will probably deviate from a straight flight path, at least a little bit, over its time of flight.Add to that the fact that these barrels lack the rigidity of a steel rifle barrel so they will tend to flex when the shot is fired and they arent precisely straight either. Many things will affect a projectiles flight pattern, including a decrease or increase in velocity, the higher the velocity from the muzzle the more erratic the flight will be also.

[drac]

A quick run-through with the GGDT indicates that those paint balls should be getting a speed of about 300 feet/sec... typical paintball velocities, if I remember right. (but remember that the GGDT is intended for combustions.
The curving is most likely a symptom of the paintball being launched spinning - magnus force effects.

If GGDT was intended for combustions, why is it called Gas Gun Design Tool?

I think you meant to say "GGDT is not intended for combustions.

[longshot1068]

Air IS a gas, as well as propane etc. Gas guns work on anything that doesnt fire the projectile with solid or liquid propelant.

[Shandora]

For the info on painballing its regulated at 280 feet per sec.

[boilingleadbath]

Woops... little typo there.
'bout time I made one [winking smily face... OF DOOM]

... and don't those regulations on paintball velocity vary by feild? <but going on infrences drawn from a (2 year?) old conversation>