I'm trying to figure out how the FOC is figured and what % is recommended so I can do this for myself next time. Can anyone explain how to do this? I know the lumenok for the axis is 27.4 grains, the 3 blazers will combine for a total of 15, the 4 inch wrap will be 5 for a total of the rear of 47.4 grains. The front will have the 100 grain head and I believe 16 grains for the insert. This is as far as I know how to take it. Thanks for the help.