A 22 CB short has just enough power to brain a deer and drop it where it stands, I have done it a couple of times and it is more quiet than most high  powered air rifles.  One thing is for sure, the barter system would be alive and kickin.  I reload my center fires except fpr the SKS and usually keep enough bullets, powder, and primers to load several thousand rounds.  I even have stuff for a few calibers that I no longer own.  If push comes to shove, I would use the best that I had, whether it is a rifle, bow  or butcher knife.