With the 7.62x39, head shoot em, facing you dead center, one inch above the eyes. from the side, draw line from the bottom of the ear to the eye, shoot into the middle of that line. V-max will work fine for that.
I shoot 150gr corelokts out of a .280 remington and try to break both front shoulders. I used to advocate the headshot all the time, but it leaves a large portion of the blood in the meat which leads to a gamey flavor in even the smallest hogs. The heart on a hog lies directly behind the right shoulder of the hog(behind the bone), we stick hogs with a knife when hunting with dogs and to reach the heart, angle the knife at a 45 degree angle towards the front and punch it in low in the chest. So if you shoot behind the shoulder, like some people do deer, you won't reach the heart unless a bullet fragments. Sometimes with a behind the shoulder you even miss the lungs, you'll see when you gut one, the diaphragm is not far from the back of the shoulder. Dead center on the lungs and the heart is a low shot through the shoulders.
The pic below is a partial of a hog I killed awhile back, you will see a white line in the pic, it happens to lie pretty close to the diaphragm, if you look against the cooler wall a line of foam insulation is pretty much in line with the diaphragm, draw a straight line from those points and it'll be pretty close to where the to far back line lays.
Hogs are tough animals, when they are fat, they bleed very little, the clots of fat from inside work to plug holes and they can make it a long way with one lung ripped up or even both sometimes. But like most creatures if you bust both front shoulders up they can't go anywhere, or you hit their brain.
I shot a bunch with an AK and the 7.62x39 round, with 122hp barnul I got lots of instant kills at less than 50yds with a round coming in behind the shoulder into the vitals. I shot a few with it over the years with FMJ's put em right through the center of the shoulders, the bullet didn't expand much, but the bone fragments did a job on the lungs and heart.
If you have oak trees in that part of the country, find one, they are dropping acorns and the hogs will be there. I had nine under my tree yesterday from 4:30pm to 7:30pm, when they ran out of acorns. I didn't shoot because they where smaller hogs(about 80lbs) and I was looking for a deer I had been seeing or a big boar hog that I have glimpsed a few times. I have a grove of about 10 trees within a 100yds of where I was sitting the hogs just spread out and start eating.
As to field dressing, just like a deer, I prefer a hog over a deer, deer stink if you ask me. Smell like a dang ol billy goat. Peel the hide just like on a deer, cut em up the same way. Nothing to it. Lots of times we use a saws all to cut em up to barbeque pieces. Sometimes I simply bone the meat out and use it in stir-fry, for fajitas, or just fry it with onions and cover with brown gravy, you can flour it and fry the hunks, my wife likes me to take hunks and fry them like hot wings.
If you want porkchops and steaks just find a butcher shop, for about $50 they will set you up with the meat all wrapped and ready to go.