These copper bullets hold together and penetrate deeper, the faster they are driven. I'll opt for the Buffalo Bore when I know I don't want to get caught shooting hard cast lead. I too, do not trust expanding handgun ammo on a pissed off boar. These copper bullets do not behave like lead hollow points, in that at higher velocity the petals seem to just get beaten back further...thereby penetrating deeper than a lead hollow point of similar weight.
At least that has been my experience. I really DO think the extra 300fps from the Buffalo Bore, compared to Corbom, may aid penetration.