Those are NOT reloads. They are surplus M-2 ball ammo. It is hard to tell what head stamp the case in the magazine has. It looks like a "67" as in 1967, but the rest of the head stamp is blocked. Post a pic of the base of the case to give us more info.
As the ammo in the can looks bright and shiny, I suspect it was polished AFTER loading. NOT a good idea. Vibratory polishers and loaded ammo do not mix well. The powder can be dangerously altered by rubbing against its self and the inside of the case. Burn rate, normally controlled partially be coatings, can be sped up to dangerous levels. An old dry primer can be degraded and "killed" by the polishing process.
In life, strive to take the high road....It offers a better field of fire.
"Robo is right" Fuzzball