Your going to have anomalies but IMO a Hog is a whole lot more sturdy than a Deer. So hydro static shock is likely to have a lesser immediate effect, at least in the short term.

Just my observation, I'm not calling it an every time fact. I shoot a Deer and you can see the shock, I shoot a Hog and as often as not they don't even flinch. A larger caliber bullet can stagger them. Like I said not an every time thing, but often. A through and through that doesn't hit bone, in many cases just makes them kick in the afterburners.

And what I said about an average sized Hog being as hard to knock down as an Elk was a quote, as was the survey I read.

Most of my encounters with Hogs are on the way from bed to food, or food to bed. I ambush them. They re moving, but not spooked. When they are moving is a good time to get a decent shot, they are often making a racket which masks your noise, the local scents are changing continuously IMO they have sensory overload and are more likely to not notice you are around.

Stalking, I usually sneak up on them asleep and I'm often within 6-10 feet when they awaken and see me, I see them and they are doing 30 MPH in nothing flat. You have a second or two to get a shot off, usually at their rear end. They usually dig into brush or straw when they sleep. My best luck has been mid morning on the sunny side of a brush pile. Or 2-3 A.M. moving quietly where the woods meet a meadow.

Here they usually feed at night and without night vision optics (illegal here) getting close enough for a shot can be iffy, if you are trying to stalk them. Full Moon or near full, is a good time to try night stalking.

Setting up and waiting where they are likely to be feeding is a whole other matter, you may get some time to aim well and pick your shot. At ground level, in a grain field, in the brush or the woods a good shot is rare, unless you are on the high ground.

I didn't say a .223 won't kill one, I said if you don't get the perfect shot, the bullet hole is likely to close up and there may not be any blood trail. No blood trail and finding that Hog can be really hard to do. If it makes it into the brush 30-40 yards you can be looking around in there for hours. I found one under a pile of brush hogged Blackberry bushes once.

Just opinion, I've hunted a lot with my .222, grant you it is a little smaller than the .223 but it would be my last choice for Hog hunting.

They may make some special hunting ammo for the 7.63 X 39 I know nothing about.

To me hunting is taking a good shot and having whatever you shoot drop in a pile. Next best is it runs few yards and drops. Acceptable is it runs 30-50 yards and drops. Taking any old shot, at anything and hoping someday something drops someplace, isn't hunting.

IMO use enough gun if you have a choice. If all you have isn't optimal, pick your shots carefully.