The thing is, with a bullet, the rifling is in the barrel and actually engages with the copper/lead of the projectile to produce a high-speed spin with energy from the gas behind it. With an FS round its more like a finned sabot than a bullet, or a shotgun slug round. So I'm not sure if a longer/shorter barrel is actually going to do much to its range provided that you are attaining field maximum velocity at the muzzle. Either way, even with a pistol-length barrel you will be outranging regular paintball guns significantly.
Jay AKA Rogue...
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