If you hit them right behind the ear just about anything works
And that is where I always aim and if I am stationary and they are feeding I just wait forthe right shot.

I came across a big boar last year out stalk hunting for deer about 30-40 yards away. It took off and I pulled the trigger when the crosshairs were dead center of the neck but f'd up and stopped swinging the gun. It went down hard, kicked for 30 seconds and was done.
Inspection revealed I hit it dead center low in the front shoulders a little low resting in a heart shot. The bullet was almost through the far side shoulder and you could see and feel the bullet embedded in the hide.
Cut it out and the 95g Barnes was textbook perfectly expanded with the petals peeled back like in their pictures about 1/2 inch in diameter.

Retained weight was like 93g, basically minus the weight of the plastic tip.

That is why I like barnes for hogs
I trust they will expand, and hold together even and close range.
Those metal petals cut and provided a lot of damage

With a well placed behind the ear shot just about anything works of course.

I wouldn't mind trying some 77g OTM out my 556 but I am concerned on the above scenario they may explode and not penetrate.