Muzzy Phantoms 220 grain. I get 21 % FOC with an arrow weight of 543 grains. They are cut on contact, and the blades are .040 thick.. I will never use another broad head.
I hit a monster buck last year at 45 yards, knocked him off his feet. His feet went straight up in the air. Not many want to take the plunge into high FOC because they are hung up on speed. I'd rather have the K.E. than the speed any day.