AK-74 Ammo (5.45 x 39 mm)
The AK-74 was basically a re-chambered AKM variant modified to take the newer 5.45 x 39 mm calibre ammunition, the Russian equivalent to the standard 5.56 x 45 mm NATO standard round. The full metal-jacketed bullet designed for this weapon has a copper-plated steel jacket and a largely steel core, as does the bullet of its predecessor, the AK-47.
.22 LR is an excellent choice for a survival caliber.
Using a good rifle chambered for .22 LR will keep meat on the fire.
It might not be Deer meat but Squirrels and Rabbits are more common anyway, and damn tasty.