Any good hard cast, soft point or even plated bullet of reasonable weight should be sufficient. Avoid hollow points as expanion is not the goal, penetration is. The bullet is already as big or bigger than an expanded .30 caliber rifle bullet. You want to punch through tough muscle, bone and hide to get to the vitals.
In life, strive to take the high road....It offers a better field of fire.
"Robo is right" Fuzzball