ORIGINAL: gmil6184
They are more forgiving because they can flex, if you have any kind of contact on a plastic vane it will mess up its flight. Feathers are also more durable, you can cut big chunks out of a feather vane and it will still fly just as quiet and straight as when it was new. do that to a plastic vane and it's ruined. Plastic is supposed to hold up better when they are wet but i think that is more myth then reality. as long as the feather isn't completely saturated they still fly just fine. I think they stabilize a broadhead better because they create more drag, inch for inch when compared to plastic.
Good post gmil! You beat me to it. The reasons gmil quoted are the exact reasons why I shoot feathers now and always will.