You've got to remember that a lot of what Ragsdale has on his Q&A site is very dated material. He doesn't think FOC is a 'bunch of crap'. It's just that when he wrote that, it was awfully difficult to get an arrow set up with a very low FOC. Broadheads under 100 grains were practically unheard of, so there wasn't much need to concern yourself with FOC. Beyond that, remember that his primary emphasis is on TARGET setups, not hunting rigs.

Nowadays, there are a whole bunch of ultralight broadheads and FOC has become an issue. Worst case scenario. Take a 55 grain broadhead and stick it on a 30" 2219, with 5" vanes (a typical WalMart aluminum arrow) you'll wind up with an FOC around 3.5%. That's way too low to get anything close to resembling reasonable arrow flight, especially with a broadhead.

I also question that stuff about 9% being 'optimum.' Don't know who came up with that figure, but it was probably somebody trying to sell something. I won't go any lower than 10% for a broadhead arrow.