Target bullets are not built to perform on game. Switch to a proper hunting bullet, like a TSX or even a simple Sierra game King.
Yes, the Match king will work if placed perfectly in the lungs, and doesn't encounter heavy bone. But if if you screw up even a little, and hit a front shoulder, etc., you will wish you had used a hunting bullet. You should have no trouble loading another bullet and achieving comparable accuracy. Do the ethical thing, and use a proper hunting bullet. You owe it to the game you pursue.
llp