It should be taken into account that vortex discs are something like twice the mass of any war-legal dart, so I'd expect drag to have a more detrimental effect on the darts' velocity.
The extra mass means extra inertia and momentum meaning that air resistance would have less impact. The drag is caused by the profile surface area, not the mass. The thing is that the discs have a larger area effected by air resistance.
One thing I've wanted to try out for a while is to see how adding mass to discs would effect their performance in higher power blasters like a volt moded nitron. The extra mass would not only allow the discs to take more advantage of the increased muzzle velocity but would also make its more stable in wind, probably more stable than darts in many cases.
Edited by Darthrambo, 17 July 2012 - 05:48 PM.