i have a feeling that you could shoot the first strike rounds through pvc pipe of fairly close bore match and still have it shoot mint, in other words I'd hypothesize that the barrel has no effect on the fs rounds (ie even the triable barrel would shoot them nice)
I suspect this is almost completely incorrect! EDIT: and the tribal test results suggest I am right.
I have a serious problem with the characterization of vortex shedding in the video. The roundness of the paint won't save you to any degree worth mentioning...the vortex shedding is sequential, not simultaneous, so there is ALWAYS a net force. This leads to a random walk, no matter what you do, and you can in fact predict a gaussian distribution (it was done once upon a time in deep blue) for the pattern. I make this a point of contention, because if you think off-roundness has something to do with it, your natural inclination is to expect rifling to make a difference. However, if you look at the shift in surface velocities induced by even the most aggressive rifling, its trivial to see that vortex shedding should still be random and with an angle that is still essentially perpendicular to ball flight (bad!).
This reinforces the notion that when launching imperfect spheres (see: baseball, golf, ping pong, tennis), spin is key not only to trajectory (Magnus effect), but possibly to precision as well - if you control the spin variable not only do you control the magnus forces, but perhaps you create node for the vortices to preferentially shed from, at least along one axis.
Edited by Snipez4664, 25 March 2009 - 08:42 PM.