Lotta people don't like to "bare shaft" test their arrows and go for the More Fletching The Better school of thought. While it is true that more fletching will correct arrow flight faster, you gotta remember what it is that is correcting the arrow flight: Drag. It's a drag, man, bummer drag.
Pappy has it right, no sense slowing an arrow down for no reason. When that arrow shaft comes off your bow 'as straight as an arrow', the least little bit of fletching is all you need to get the shaft spinning and stabilizing the flight. And before someone jumps in and adds the arguement that you need more fletching if you shoot broadheads take into account that even if you have a broadhead on the shaft, an arrow matched more closely to the bow must recover faster because the wind planing is less severe than a poorly matched shaft. That being said, I reserve the outermost turkey primaries for hunting arrows because they are much stiffer and I leave them taller than target, stump, roving, and general plinking arrows. They end up about 3/8" high at the back and 1/4" high at the front, straight cut, 5 inches long. Kinda Sioux looking, ya know?
I now yield the soapbox to the next person, thank you. Hope I didn't sound too much like a know-it-all.