Well, that's always a tough call. Do you take the chest shot, knowing it will be a kill but that he might run 30 yards? Or go for the head shot anyway, which might miss altogether, or blow off his jaw if it's low?
I'm glad to see that even the ones hit with a .25 sometimes run a ways. Makes me feel a BIT better about my two run-offs this year.
Bottom line I guess is that chest shots are easier kill shots, but not always DRT. Head shots, if you hit the brain, are always DRT. (not counting The Fancy Dance) But the problem is the 'if'.
Remember my chest shot from yesterday, where she was standing straight up, looking at me? Thinking more about that, the chest shot was better, as the head shot stood a chance of deflecting off the angle of the forehead. And it just FOLDED her right over. No flopping around at all.
Anyway, all that was not meant to be critical. I've flip-flopped a couple times between body and head shots. I've hit the head a couple times not where I wanted to, jawed and starved them. (killed plenty with headers though too) Then, when I was disillusioned with the head shots, I got a few more, including two spine shots, one of which escaped, and one of which took a follow-up shot. Got one in the shoulder too, which ran off. (admittedly that might not have happened with your 24 FPE .25) Others? Folded right up, DRT.
In the end, the only thing we can agree on 100% is that squirrels are the toughest animals, pound-for-pound.
