ST Axis Arrows..Whos Shooting Them???

[HogginHank]

I have been pondering getting new arrows. I currently shoot BlackHawk Vapors ACA arrows. I was down to 2 arrows so I decided to go get a few new arrows. I have heard good stuff from the bow technician at the bow shop in San Marcos TX and he uses the Easton ST Axis arrows. I went ahead and got 8 of them cut and 100 grain field points put into them. I shot a few and paper tuned my bow and sighted it in. I was wondering what they were shooting (fps??) so I shot 3 threw the chrono there and they were at 260 fps. My other arrows were shooting 267 fps and they had feathers and were the same length. The new arrows have vanes. I wasn't sure why the loss in fps until I weighed the 2 different arrows. The BlackHawk Vapors were 273 grains on the scale and the ST Axis were 305 grains on the scale(without field points)

Will this weight difference make me lose that many fps??

And do any of you use the ST Axis and have you shot any game with them?? Thanks in advance