Hey, I get the hunt for reloaded ammo. I haven't tracked down the really oddball stuff myself, but I'd check local gun shops, people usually trade or sell rare rounds there
I've got a pile of various common pistol and rifle brass I could load up, but nothing too crazy like an 8mm Lebel. What are you actually looking for with that "odd ball" tag? Give us a list of calibers and maybe we can make a deal happen