There've been people -- or maybe it's just one person -- at the gun club where I'm a member leaving new brass (with boxes!) recently; .308 WCF, .223, .270 WCF, .30-06, among others. I was picking up some new .223 a month or so ago while I was waiting on someone to set their targets and a guy semi-confrontationally yelled, "Hey! Are you picking up that brass?!!" I replied that I was and then he offered me 100 rounds of once-fired Remington .30-06 and said, "I've been waiting to meet someone who reloads since I don't."