A little info: I shoot Cabelas Carbon Hunter 55/70s at 68 lbs at about 260 fps.

I have shot at 2 deerin the last 2 years: both are dead, however, both times my arrow deflected on ribs. They were both mature bucks so their ribs were pretty thick however...but this has never happened before.

I am shooting a heavy head for my setup (125 grain head) because I want the cutting diameter AND low slope of the blades for better penetration.No problems tuning. I cheched my FOC and it is at 10.1% I amnow thinking that this createsa greaterpotential for deflection. I probably slept through that part of physics but I think it has something to do with the effect of an indirect force(the bone adainst the BH, trying to resist penetration).

When thecenter of gravityis closer to the head, it is easier to deflect(my idea).


So I am asking all of you for your thoughts: Can too great of FOC make a greater chance for deflections? Do you agree? Am I way off? Help please! Something made me almost loose my last 2 deer, and it needs to be identified!