Yes, this is a serious question. If you're from the city and not really kosher with slaughtering animals for meat, please don't read this thread.
I'm on a board of directors for a local wildlife refuge here in Kentucky. We have 2 African lions, 3 mountain lions, a bobcat, and a bunch of wolf hybrids. Anyways, a local farmer is willing to give us an old cow that is attacking children (gotten grumpy I guess) as long as we put it down and drag it off.
For those of you that have been around non-profit stuff, money can be pretty tight, so an entire cow's worth of beef would save us a lot of money (the cats eat 100lbs of chicken every couple of days).
Anyways, long story short, I'm sure I can get close enough to deliver a head shot and won't settle for anything less as I want it to drop on the spot. From talking with my dad when we had beef slaughtered on the farm it was done with a .22 to the forehead and they always dropped on the spot. I'd rather up the ante some, so anyone with experience here, will .40 do the trick? I can do ball to make sure I get the penetration I need. If it's not adequate, I have several rifle calibers at my disposal (.223, 7.62x39, .25-06, 7mm Rem Mag).
Also, will a frontal shot to the forehead work? We've got some ranchers and stuff on here, so I'm sure someone can point me in the right direction. Google searches so far were coming up with flash games. Thanks for any help!