Zingers for the last two seasons. Z3's with 6 degree helical original formula not the newer ones but I may go to those this year. I Love them. They seem to stabilize my 150grain 3 blade VPA;s just fine. My Bitz is getting a long rest. I also have used Blazers and the Q2i's. I've been bowhunting for a long time so I've used a lot of other kinds, types and sizes of fletching over the years. Gateway feathers have been good in the past for me and so have the Trueflights. Because I wanted to increase my FOC to reach EFOC, I wanted the zingers on the back and standard nocks to get my FOC up as much as possible. I don't shoot anything very fancy either as I'm cheap. I have an arrow saw so I buy the GT Hunters or XT's and cut them from both ends to get to my 28" length. Then I use 100 grain ethics inserts with hot melt. I add my 150 grain VPA's up front, zingers on the back with standard GT nocks. 532grains TAW. 21.7% FOC. I shot through the shoulder "knuckle" of a small 8 this year and it completely devastated that buck's shoulder and still managed to go through the lungs and scrape the bottom of the heart and poke out the other side. I have pics of the carnage on another post on this forum on the CSI Saddlehunter post by
@Nutterbuster. The deer died within sight at 40 yards. I love EFOC and beefy broadheads. I have a short DL so my arrow weight is under 600 because I don't want too arcing of a trajectory. I think I'm shooting these at about 245fps with a 60lb Darton Spectra E and my back up bow is a Chill R. The Darton is about 7 to 9fps faster than the Chill R. I know you just asked about fletching but thought I'd expand a bit. Hunting season for me is over so now I have to pontificate about it to everyone instead of doing it.