Jerry,
When I went to Africa to hunt cape buffalo I took a dozen 600 grain AD Hammerhead arrows that Paul Mattson of Badger Arrows made up for me with 100 grain brass inserts, 70 grains of screw-in brass weights behind the inserts, an aluminum collar between the insert and the front of the shaft, and unibushings with g-nocks at the rear. With the 315 grain Ashby broadheads from Alaska Bowhunting Supply, the total arrow weight was 915 grains. I also took along an identical set of arrows except I left out the extra 70 grain screw-in brass weights, which left me with arrows weighing 530 grains. With the 315 grain Ashby broadheads, total arrow weight for the second set of arrows was 845 grains. My bow was a Super Shrew 60" 68#@29.5".
I think that either arrow setup I used may be a little little heavy for what you want with your bow, although I don't think it would hurt to have the 845 grain arrows (total weight including the Ashby broadheads). If you wanted to, you could replace the 100 grain brass inserts with the standard aluminum inserts that are only about 15 grains which would get the weight down closer to the 760 grain range.
Paul Mattson at Badger Arrows can make up the arrows (he made mine) and is also an ABS dealer, so he can get the ABS broadheads too. I like the front collars and the unibushings with g-nocks, and Paul can install those. If you decide not to use the collars or unibushings you would knock off another 15 grains of weight.
I would rather go with front end weight than weight tubes to get the weight up for reasons that Ed Ashby articulates better than I do. The Hammerheads have more weight and more strength up front than the Grizzly Sticks, although both kinds of shafts are good.
Allan