also....im told that while tilling to try to get 50#, it could go 3 lbs either way, and given that, the new limbs are what I will be shooting, prob for a long time to come I would not be upset with high 40's as long at it will kill effectively. Carbon's (the MFX) make me nervous, that checking the arrow and possible splintering inside an animal, the warnings alone on Bemans site make one wonder. I know they're better than they were even 10 years ago, safety wise. Are they really that effective?