Maby this has been discussed in length, but I would like some opinions.
How do you classify your kill distance?
By this I meen, how do you judge weather or not you can kill at that particular range.
Do you say I can kill efficiently if you shoot 10 times at a deer target and get all arrow in the vitals, 30 times, 40 times, every time I shoot?
Is it the grouping. If I can group 3" at 30 yards with five shots, 2" at 40 yards wtih three arrows, etc...?

How does everyone gauge how far they should be shooting at animals?

Just curious.