Nice finds, you never know what may end up in the garbage. Those bullets look teflon coated.
BTW-There is a whole section devoted to dumpster diving here on Tnet- Dumpster Diving
After two knee replacements, I no longer do serious dumpster diving. More or less dumpster peeking. Plus the new dumpsters lids must weigh 200 pounds. But, way to go. I've found junk jewelry, ect. People just dumped them. Once I found 20 loose nickles in a shoe box. I thought what kind of idiot would do that. Keep on diving. And there is a dumpster diving thread her on TN. It's over with garage sales. Good luck.
Nice finds, I believe the ammo is training rounds the actual bullets are wood, they are Eastern European, I believe for a A.K. 47, anyways Happy Hunting