I think everyone who has already replied has given good insight. When I'm using good form and shooting often, almost any fletch will do with field points. (think about the number of times you've been out stump shooting with less than your best arrows, for good reason, and got by). For hunting situations, no matter how much I've practiced, I still struggle with the adrenaline rush of seeing a good deer within shooting distance. In addition, the deer always seems to come into view from the direction I just knew they would never use. So being out of position happens. Net, I'm thinking I need every advantage fletching can give me. So my hunting arrows have strong helical, 5-5.5" shield cuts.