I don't know how big the boar are where you are (boar are pretty tough skinned/muscled) or how open an area you would be shooting at them in but I wouldn't want to try to take a big one from the ground in the woods with a .223. 100, 125 Lbs. with a 69 gr. bullet "maybe". Anything bigger give me a tree or the .308. I've seen pig take with HMR .17. But they only weighed about 75 Lbs. and were shot at night over an open field.
Guns are not dangerous! People are! RKBA!