Boxtraps made of rock, pitfalls dug in snow, and deadfall traps caught larger animals such as foxes, wolves - even a few caribou. To catch a wolf, Eskimos occasionally used what one explored called 'the most fiendish trap ever devised' - sharpened splinters of caribou bone set into ice and smeared with blood and fat. When a wolf licked the bait, it slashed its tongue, and, goaded by the taste of its own fresh blood, kept lapping until it bled to death.
Something that huge, I can't see taking down with ones' hands or even spears, hunting them in a group!
I wouldn't want to have to handle such critters by low-tech means. Give me something center-fire, accurate, and non-jamming.