mradiel,
As a suggestion, Barnes makes a 300 and 350 grain X-bullet in .416 that would be an excellent wieght for boar. These are supposed to be less prone to exploding if they hit bone yet having all the knock down punch you would expect from this caliber. If you do not hand load I can recomend a place to get these made to order for reasonable price. Where about do you do most of your boar hunting.