Air rifle for long term SHTF small game hunting situ.

I am into regular firearms, but never messed with air rifles at all. I am looking at .22 cal air rifles to keep for a long term SHTF situation since i dont have easy access to big game like deer, or would have a place to store the meat since in a SHTF situ i may not have electricity to freeze or refridgerate it. I was thinking i can use this to hunt small game for food. Squirrel, rabbit, quail, dove etc. Something fairly quiet when fired so it doesnt let people know where you are like a regular .22 rimfire rifle would. Looking at pump action only so it doesnt need external power source like CO2 cylinders which may be hard to get after a SHTF. I figure .22 pellets pack a punch over the smaller .177 with small game for quick takedown, and are cheap. About $14 for 500 rds.

I looked at a Benjamin 392 pump action .22 air rifle at Academy sports and outdoors. Shoots at 685 fps which is pretty quick. About $144 plus tax, but prob could find cheaper on ebay. A replacement piston seal kit is about $5 so get a few of these as spare parts, and a couple tins of .22 pellets. Thinking it may be up to the job. Prob want to get a good scope for it. Figure i could use this to hunt for food, and keep my other weapons for use on 2 legged intruders. Any thoughts

I did a lot of squirrel hunting (ground squirrels here, can't eat) with one of those when I was a teen. Great air gun! But it does have a noticeable report.
At that time, Benjamin didn't provide a way to mount a scope... would have been nice.
I now have a break-barrel Benjamin w/ scope that advertises 1000fps. Packs a wollop, but still doesn't carry the stopping power of the larger round.
The biggest CON of the spring air is the recoil. Very hard on the scopes crosshairs. Breaks them.
You have to put a 'spring air scope' on it, if you want any shooting enjoyment. Plus, the recoil does effect accuracy.
There has been a growing popularity with the gas powered (very high-end) air rifles that use tanks, much like those used on paintball guns. Expensive, but has to be just a gas (pun intended) to shoot !
You can find example of them on YouTube. Like this one: The Rooster wasn't much a medic :)