For what it may be worth Brian....

I disassembled the Managed Recoil version of Remington's 270...IIRC it was a 130 bullet, but the powder charge was 36 grains of IMR 4198.... which was suppose to give an MV in the 2500 fps range...

for 2200 fps, you should be in the ball park with 35 grains or so of IMR 4895....