Im getting ready for my hunt and fletched up a bunch of new arrows. Im shooting bemans ICS 400 with 250 grains up front. I bareshafted my previous arrows with this weight and they fly perfect and hit hard. The only difference with the new arrows is the color of fletching. Since I only have a few days I started practicing with my Zwickey broadheads (eskimos). Im using 4 x 4" feathers, with field points they fly great. I had been practicing with the same set up but was using red feathers, my new batch of arrows are fletch with bright green feathers. I started shooting and it seems that every once in a while one of the arrows will plane and go off to the side or drop down. Its not always the same arrow. Sometimes it shoots perfect and sometimes it seems to plane. Im not sure whats going on. Could it be my fletching, maybe I need to go to 5"? What do you think? I have spinned tested them and they seem fine. I really want to take of this. Need your thoughts and advise. Thanks. Gilbert