I've had good luck with wild boar a few times as well. They're a bit tougher to kill with one shot than a deer. I've used 30-30, 35 Remington, and .308 with success. Any good hunting bullet that gets inside the chest will do the job.
I was displeased with the flavor of an un-castrated boar hog. But the females are always good eatin'.
Jack
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