Understanding FOC?

[michigandrake]

I'd like to hear some experiences with the amount of penetration guys get when they hit the heaviest bone on the off side shoulder.
We all know that the 2nd best shot angle is the slightly quartering away angle. That means we are actually aiming so our arrow is gonna exit just about at the heaviest bone on the far side, especially if the far leg is back. The odds of getting an exit wound for a lot of us go way down when we hit that far shoulder or the joint of the far leg bone. It might be a great shot, totally lethal. But without an exit wound, will there be an adequate blood trail?
Personally, my reason for wanting a heavy arrow, high FOC, and a bomb-proof broad head is so I can punch thru the far shoulder or leg joint. Gotta have 2 holes.

Have not got a blade yet but here are two offside bone hits, both complete pass throughs. The leg was a 145lb buck and the ball joint a 110lb doe. Both shots about 25yards. Hard to see in the picture but you can feel the marks on the smooth bones of the shoulder joint where the single bevel torqued the joint open and got through. One grove on the lower bone and an opposite grove on the upper bone. I did not cut that joint open it just fell apart when I took the muscles off. The thing I recall most about both of these hits was how non-violent they were ...... really quiet with a slight pop on exit. Very little shock to the animal considering the damage. I think that speaks to the efficiency of the setup.

500 grain arrow going 225fps tipped with a Grizzly single bevel. I am just short of 10 grain per pound of draw. About as heavy as I can go and have a trajectory I can live with.