Marlin 22 Mag, bolt action.
I believe why alot of people choose the 10/22 because there are so many already sold and the "after market" accessories are so numerous that odds of getting stuff for your weapon after the SHTF is a lot better.
Another reason why they choose a 22 is the ammo is one of the most readily available in the USA and cheap.
I have that same Marlin .22 mag except mine is blued and wood stock. It is not particularly well finished and the mag looks like it would have problems feeding as the tip of the bullet is a ways from the chamber. It sort of looks like the cartridge is hanging in the air.
However it has never failed to feed perfectly and it is one of the most accurate rifles I have ever owned. I am not saying most accurate rimfire but most accurate period.
A few years back Wal-Mart cleared out the 10 round mags and I bought 7 or 8 or them at $5.00 each.
It sort of reminds me of the days when a few guys would have a very plain looking 50s or 60s car. On the outside it looked like it probably had a six cylinder with a 3 on the tree. Look under the hood and it had a 427 with all the extras and a Borg Warner 4 speed, positraction etc.
It doesn’t look like much but it really performs.
There was a time, when Ruger made the 10/22 in .22 WMR (magnum)
You can find some used ones for a price.
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=326342907
Current Bid $1,200.00 Reserve Not Met