OK, sorry to take so long. Had to help take down the christmas tree![X(]

I weighed two different brands of 4" vanes, and came up with 29 grains, and 30 grains per 3 vanes. If we go conservative and use 29 grains, adding that to your other numbers(which are accurate)we get a total arrow weight of 404.5 grains.

At 250 fps, this translates into 56.15 ft.lbs. of KE.

Enough to blast through any deer walking.

I don`t think it is enough KE to use some of the real big mechanicals, but you might want to check out 5 shots data for that.

BTW, that is a pretty sweet rig for your first bow!