HA! Show me the person that shoots a mountain lion or kodiak bear WITH ONE arrow, while on the same height as the animal, and doesn't get mauled....hell, a whitetail deer that is shot through the heart with a broadhead will still run 50-100 yards before dying.
And the blunderbuss is not a black powder rifle, it is a very crappy shotgun that has crap range.
You got jumped by a predator and we're killed because you only had caveman or slightly better weapons, get over it.