Archer Fred Bear, in going after dangerous game with a bow, carried a .44 mag pistol hidden under his jacket. For his films, he had a rifleman standing off screen, just in case.
With all due respect to Fred Bear, my money's on the guy with the rifle to stop any charge.
When something big and angry is charging, there is a lot more accuracy and margin for error with a .458 Win Mag rifle than there is with a .44 mag pistol. Just need a competent rifleman because rifle will do its part in stopping instantly any animal on the plant.