A .22 rimfire is also quiet, so it doesn't give away your position...In a survival situation I would suspect that you would kill many more squirrels, rabbits, coons, possums, turkeys, doves, quail, groundhogs, crows, foxes, cats, dogs and the like to eat vs deer...
I've used Remington solids and CCI Hollowpoints on deer...Either to the brain drops them...
A 1200 pound cow moose a hundred yards away doesn't present a threat, just let her pass...
I would suspect a cow would be closer to 800 pounds...