Well.. I have something of a cheaper way for you to find out.

Get yourself a XX78 or XX75 2314 arrow shaft (with super-unibushing). Set it up with the same point and feathers you would use on the ACC. If this arrow tunes and groups well, the 3-49 should work fine. The 2314 is ther same spine as the 3-49..the component weights (nock insert, etc) are different and tend to make the 2314 a bit softer in spine when set up apples to apples.

If you went from a 75 grain tip and feathers to a 100 grain tip and vanes it would likely keep spine the same...as the vanes at the back would offset the greater weight at the tip (adding weight at the back increases spine, adding it at the front decreases spine)

As I said before..this is a tough call...you are right on edge weight-wise and are uncertain of arrow length and whether you would use a loop...and the effects of the magnock is unknown too...too many unknown variables for me to hazard anything other than a best guess.

JeffB <img src=icon_smile_big.gif border=0 align=middle>