PowPow
Where's the beef?
Yes, but the point was, MODERN ammo is not a problem for corrosion.
And BTW, commercial ammo in the US switched to non-corrosive primers well before the US military did. There were concerns about the long term storage life of the early non-corrosive primers.
Also, all M1 Carbine US mil ammo is non-corrosive.
The reason for my post was that I think the friend was probably referring to corrosive primers and not "modern gunpowder". Nothing I said is in conflict with your post above. Commercial does lead the government, since they want those contracts and they want their products to be better and more competitive. The dates I provided are useful in that if you know your ammo was made after X, you know without doubt that it is non-corrosive. If not, you need to do research.