You're sure to get a lot of responses on this one!
I prefer to use a large caliber rifle, because you never know if you'll be shooting at a dinner-size hog or one the size of a bulldozer, so I feel it's better to be over-gunned than under-gunned.
I have a Savage 110 in .30-06, and I shoot 180-grain soft-point ammunition. It's a combo I've used a lot, I'm comfortable with it,it is accurate for me, and...itknocks 'em down just fine.
Any large caliber. I use a .308, but 7-08, through 300 mags are my recomendation. Mostly because large boars have a think pad protecting their shoulders and smaller caliber bullets won't make it through if you take a broadside shot. Personally, I am not much of a hog hunter, but rather a hog shooter (which means, I have access to a property with very large populations, so I pretty much harvest one, as opposed to hunting them), so I head shoot everything. If this is your situation, anything from 223 up will do. I usethe .308 because that is my carry gun on the ranch.
I hope a 7mm-08 will due. That's what I plan on using next month when I go.
__________________
Trykon XL 70lb
Trophy Taker Extreme FC
G5 Montec 100gr.
NAP Quickspin Speed Hunter
Brad Bow Stopping Point
Scott Stingray
Fuse Axiom and Katana
Easton ST Epic Realtree 340
Lone Wolf Alpha climber
Game Plan Gear Bowbat & Spot N St
I use a .22, and that's not a typo. If I was going to be shooting a big boar I might use a .223 or .243 but a .22 right behind the ear on a smaller hog will do the trick. I friend of mine has killed a few 150-200 lb. hogs with his .22 (lung shot)and his little sister using a .243 killed 300+lb. gilt. I wouldn't use a .22 if I was trophy hunting for boars but for sals and population control, it works fine. If I was hunting for trophy boars at a place I've never been, I would probably use my 7-08