Left some of my cheap practical steel cased ammo in the truck of my car. Went to do some training today and found it was rusty.
I decided I was going to go ahead and use it, perhaps get the chance to practice my malfunction drills. I found that the B&T APC9K ate up this rusty ammo with no complaints. Only had one failure to fire on the Sig M17.
Really goes to show the value of proper ammo storage.