I currently use a 1911 45 cal five inch barrel, but this weighs about 3.5 lbs including holster & extra mag. Is there something lighter to carry and still have penetration to stop a 300 lb hog?
S&W makes Scandium .41 and .44 magnum revolvers. They are far lighter than a 1911 and penetrate more than a .45.
Catch is... they kick like heck.