I am sort of in the same frame of mind as Jason Westbrock. For years I just made arrows and they were the weight they were and as long as they performed well I really didn't do much more than select the spine I needed, made up the arrows and attached "standard" bh's to them and went hunting. When I made the switch to carbon there was always the weight problem. I played around with all sorts of ways to get the weight up and ended up shooting 650 grain arrows from my 65-70# recurves. These arrows had some sort of weight tube or weed wacker line in them and along with that all the little things that make you crazy like nocks popping out, noise, etc. Then I read about the high FOC arrows being used by Bob Morrison. When I got my DAS bow I dropped weight down to about 60# so had to get new shafts. I had been using Axis 300's with about 225 up front. I started using the Beman shafts, size 340, with 225 up front. They tuned perfectly from my bow so I just left it at that. My wife shoots Bemans, size 500, which were technically too stiff for her 45# DAS. So I put 200 grains on the front of her arrows and they tuned perfectly. I have found that the extra weight up front has seemed to improve my penetration but the goal has always been to get an arrow to tune perfectly. If you don't have a straight shooting arrow all the other stuff amounts to little or nothing, IMO. I know lots of guys that shoot lots of animals with "regular" arrows without high FOC or much consideration for anything other than straight shooting shafts. For any game in North America almost any arrow that is tuned to your bow that gives perfect flight will be fine on any game you decide to shoot. The trick with any of the issues in this thread is to come up with a formula for the arrows you shoot and stick to it. Once you find an arrow that shoots/tunes perfectly from your bow don't try to "fix" it by adding weight, FOC or any other variable. The only reason I have high FOC on our arrows is that is what makes them shoot the straightest and only coincidentally do we achieve arrows that most would consider to be hefty enough for big game hunting. If my arrows had turned out to be 500 grains instead of 600, but still shot well, then that would be the end of it. If I were going after big and dangerous game I would probably get more "into it" in regards to the concerns being discussed here. The real goal, I guess I am saying, should be an arrow that just plain shoots straight with your choice of bh. For the game that most of us hunt that is all that will be required.
For next season I was going to try to get my FOC up to 300 grains. I set some arrows up like that but found that my sight picture changed too much for me as the arrows dropped way too much along with other tuning issues. After thinking about it for a while I decided that to get the 300 grain FOC shooting well would require changing too many things and cost too much money. I am very happy with how my equipment works now and it put down a 600 pound moose this year that only travelled 20 yards after the shot. I doubt that I will ever shoot an animal any bigger than that moose. While I now prefer my arrows to have that high FOC if I could not get them to shoot perfectly I wouldn't be using them the way they are. All the things Ashby has concluded has its merits but none of it is really scientific and is all anecdotal. The only thing that I have found to be indisputable is the need for an arrow to be shooting straight and for bhs to be sharp.