ORIGINAL: Snook384
I use the 40 grain hollow point. I have never not had a hog just drop when you hit them in the head. I have also never had the round deflect. Maybe I have been lucky but my go to hog gun in the summer is a 22 mag. I have shot a few that twitched on the ground for a second or two.
There's a lot of difference even between a .22lr and a .22 WMR. But neither would be my go-to gun given a choice. Just moving up in caliber to a small .22 centerfire with the right bullet can make a huge, huge difference.
There are two times that I do use a .22lr on hogs. If I see sows with piglets, I try to kill all the sows as quickly as possible, trying to keep their corpses in one general area. My dog I've got now makes it a little easier, because he'll grab and hold a piglet for me. The other sows hear it squealing and will often come running to its aid, making themselves easy targets. I'll leave and come back to the area later with my .22lr and clean up any of the piglets that remain or returned. Some of them aren't bad eating, and I don't ruin as much meat that way. And I can stay far enough away the noise doesn't spook them and make them run. The other is when I've got small ones in traps that are too small to sell.