So how much do they slow down your arrow at 40yds, did you chronograph the loss, Helical fletch or offset? This gets debated a lot, but I have never seen any actual chronographed data. It makes sense that a helical fletch or fletch with more surface area would be slower but how much. I would guess the style of fletch has more effect then the surface area in this comparison. I personally started with offset fletch and went to Helical, and would never go away from Helical for the accuracy gain. Anyone know of some hard data on this?