"Its safe to say all American Milsurp from the early 50's on up is non-corrosive."
Uhm... no, not 100%.
Through the 1950s and into the 1960s some batches of military (primarly Lake City) match ammunition was loaded not only with corrosive primers, but also mercuric primers, as well.
These are identified only on the box, and by the match headstamp on the case. But, apparently not all match ammo was so loaded.
The boxes were clearly marked that the primers were both corrosive and mercuric, and that the cases should not be reloaded and the gun cleaned properly after firing.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.