My new total arrow (target)will weigh +/- 372gr.

tip and insert will weigh 111gr.

Arrow is 27.5" from throat of nock to end of carbon.

How do I figure FOC...and what does a higher FOC give me as far as an advantage? I think I understand this (Higher FOC .....if total weight is the same between two arrows....is 'better').

I'd like to know more about why.

Thanks.