Great data Blodg!

Just for fun I calculated the theoretical speeds for the Alley at 63 pounds by scaling your 70 pound measured values and using your 83.7 grains of virtual mass.

At 63 pounds.
Arrow---Measured--Theoretical
Weight--Speed-----Speed-------Difference
315------292------291.9------- -0.1
350------279------279.9------- +0.9
449------253------252.5------- -0.1

I love it when the theoretical matches the measured so well. Looks like you must have measured virtual mass pretty accurately. From here we should be able to predict speeds within a 1 or 2 feet/sec given any change in the peak weight or arrow weight or draw length.

For example 500 grains and 63 pounds yields 241.2
----------- 300 grains and 60 pounds yields 290.4
----------- 500 grains and 70 pounds yields 254.3
----------- 275 grains and 55 pounds yields 287.5


Looks like a great bow!