I have killed alot of deer, hogs (over 400lbs), javelina, and cow nailgi with 22 caliber rifles. Actually the biggest boar that I have ever killed I did it with a 220 swift, from 125 yards.

When I'm driving around the ranch I carry a 223 ranch rifle in the truck with me. The very first day that I had it, I was checking the cattle when a mature "cull" buck walked out about 100 yards infront of me. I had never shot the gun before, but I feel confident with any rifle, so I didnt hesitate to shoot. Well guess what, I hit him at the base of the neck and he was dead before he hit the ground.

My friend carrys a Remington mohawk rifle in his ranch truck that is chamered in 222. He has killed dozens of does and mature cull bucks with it. Not to mention countless hogs, javelina, and turkey.

I wouldnt use these calibers if I was hunting in Sask. or Alberta. But they seem to work fine on the deer that I shoot (100 lb does-180lb bucks). And they work well on big boars, but I do always aim for the spot right behind the ear, maybe thats why?