I read ( on this forum ) that many people prefered right helical as it would have a tendancy to keep the broadhead tight on impact, as opposed to ( with Left hand ) have a tendancy to loosen.
That's the funniest, and most ridiculous, thing I've ever heard. I hope no one here believes that.
It makes absolutely no difference whether it's right, or left helical. In fact, most archers I know using prong rests still use helical, just not a lot. Slow motion video even showed that it makes no difference what so ever, even for finger shot bows.
Unless.............
you're using real turkey feathers. Feathers from the left wing of a turkey must be fletched "left helical" and from the right wing, "right helical". That's the ONLY time it matters.