I don't hunt at 60 and 70 yards but I do practice at that distance andI use 4" feathers almost exclusively. The only other vane that, IMO, works as well as a feather is the quick spin speed hunters. I find that the controlfeathers offer far outweighs the minimal velocity loss.

I haven't shot themyet, other than just a quick couple of shots behind the store,but I have fletched up a few arrows with six 4" feathers and a few others with six NAP quick spin speed hunters.I can say that there was absolutely no fishtailing to the arrow what so ever from 30 yards out of a bow that I just threw a rest and sight on. No tuning at all was done.

One day I will get around to shoot them through a chronograph at distances farther than 20 yards to see how much velocity loss there might be.