I've used my friend's modified nerf stryfe, which has the plastic rifling groves in the barrel. There were some noticeable affects on the darts, like the fact that they sometimes spiraled in flight and sometimes curved in similar directions. My theory is that the rifling, though not affecting range or accuracy, is sometimes causing the Magnus effect on the darts. Idk if this is possible, but this is what I think.
Necro