That's the opposite of what you want to be doing for good broadhead stabilization. You want to increase FOC not decrease it. I'd just shoot the heavier arrow with the same 125 gr. heads; save some money and get some more penetration. I doubt you'll even notice the 22 gr. difference until you get well outside your effective shooting range. (and yes, that was kind of a slam!)

The #1 reason I use A/C/C's is that I had an all carbon blow up at release once. Once is all it takes, no matter where the fault lies.