Two books by Wendall Berry arrived from the main branch yesterday. One is a book of essays (Home Economics) and the other a novel, A Place on Earth. Looking forward to both. I have never read anything by WB.
When the pigs head is down (as in eating), unless you crouch to aim, the bullet impacts at a vastly different angle. Note that the usual spot is at the vertex of the X between the ears and the eyes-see illustration-but this is only when the pig is looking up at you. Note the angle of entry difference in profile view illustrations. Thus, if the pig's head is down, you have to aim high to actually have the same penetration effect-that is into the brain. (Another thing the book's don't tell you.)
In practice, I have only shot two pigs with their heads up. Both were textbook on my part and the pig's part. The other times, the pig's head was down. I have, by chance (or bad marksmanship) shot high and brought them down with one shot. (The other 2-shot pig, my first, proves the theory again, by the way.)
Oremus pro invicem!