I am hoping someone has seen this before. My late uncle was a gun collector and I ended up with some of his ammo after several years. About 90% of the ammo has this dark coating over the tips, and labeled MOLY. Ive shot several hundred rounds of this moly coated ammo in different calibers and never had a fail even though its 10+ year old ammo. I was just wondering what this coating is for? I assume its some kind of moisture protection. Any thoughts? Thanks.