well the wb made the feather like that over time and id say the arrow only has about 250-400 shots in it and that wb just slowly tore it up for me atleast it was slow because i had minimum practice but every time i would shoot i w'd look at the feather and i could see the feather ripping apart....idk also because my wb touches about 1/4 inch of the feather when i have an arrow nocked but something is wrong weather its just the feathers ,or the wb isnt alligned right......and yes the hole is big enough for the arrow and it is even alittle abigger just like the manual said it was supposed to be like