Ok I know this thread has drifted but..

I grew up on a hog farm to I've killed a bunch of pigs but slightly different environment and methods.

Through the ear was always good even with a 22lr.

If I recall the heart is really low in the chest cavity. Is this true? So basically you don't want a normal shoulder shot if I remember how the things are built their stomachs are up higher? If you were shooting one straight on you'd want to aim lower third of chest?