I am having a problem with broadhead planing. I'm shooting a 2009 Firecat, 28 1/2 draw, 68#. 363 gr. arrow (Victory NanoForce) small diameter arrow. I have them fletched with 2 inch quick spins. Shooting around 315 fps. Been shooting Shuttle T Locks and Slick Tricks, and both are planing about 8 inches or so at 20 yards. No rest or clearance problems. Wondering if I need more fletch at this speed for a fixed blade head, or should I just switch over to an expandable? Thanks in advance for the help guys!