I use Slick Tricks, 100 grain. They fly absolutely awesome out of my other bows.
I am pulling about 65 pounds on a Jennings bow, a QAD drop away.
For arrows I have tried all that I have, and after finding a small fletching issue recently I am having great luck with practice points.
Arrows I have and tried with this set up:
Easton Axis ST's
Blackhawk carbon Vapors 4000's
Blackhawk carbon vapors 3000's
Easton LightSpeed 400's

The broadheads just seem to be drifting a little bit, and I was curious if there was math involved in finding the shaft I am after.
Redneck, that was very usefull information! I have great confidence in my broadheads, I have lots and they all do the same thing once my arrows are made and tested for wobble. I am using a combination of 4" vanes and 2" Blazers, they all do the same thing.