Nero, all I know is what the NRA published some years ago. They had it down by date and lot number. Noncorrosive .45 ACP (or .30-06) was not made in government arsenals or on government contract until the early 1950s. Not only WW II, but most of Korea was fought with corrosive ammo; .30 carbine excepted. All USA made .30 carbine is noncorrosive because of the difficulty of getting at the gas piston to clean.
Might have been some repackaged commercial ammo with noncorrosive primers, as used since the early '30s; but real GI is chlorate. You got lucky. Did you live in a dry climate?
Chlorate primers leave a residue of potassium chloride, akin to salt, sodium chloride. In humid air it picks up moisture and forms strong salt water in your barrel. Oily "powder solvents" don't do anything to the chloride. The original paper by the guy at the Bureau of Mines who figured it out was titled "Corrosion Under Oil Films." Old style GI cleaner contained enough water to dissolve out the chloride, with enough oil emulsified to prevent rust from the water. Plain water followed by drying and oiling will do.
I clean my black powder rifle with Windex, even though the primers are not corrosive, the black powder fouling is, and it is water soluble, too.
Scooter, I don't know what you are smelling but it isn't the primer residue, KCl has no odor. Maybe whatever powder that contract used.