ORIGINAL: Arthur P
Well, on an arrow with decent mass, like the 2315, you won't see a huge difference between 4" vanes and 5" feathers. The arrow's weight will have enough momentum to maintain downrange speed in spite of the extra drag.
Thanks... That's what I was wondering and exactly what I needed to know.
An aluminum 2315 with standard 4" vanes is still the most inexpensive setup around. I mean you can pick up a dozen XX75's for dirt cheap.