In a survival situation a reliable semiauto .22LR (i.e. Ruger 10/22) and a low power scope with back up iron sites has a lot of flexibility. Small game can be taken easily such as rabbits and head shots on grounded birds is a definite option. If the opportunity arouse a close head shot on a deer is not unheard of, but you would have only a single opportunity. I know there are many combo single shot "survival weapons", but we all miss and if your tired, wet, and cold the probability rises of a miss. So a follow up shot may make the difference. There are many opinions to this I only express mine based upon the experience I have had.<br><br>