My son is the assistant manager at a guns and ammo place. He gets to see lots of neat stuff. A customer came in yesterday and wanted to sell stuff from an estate. He'd opened an old old VW van and found guns and ammo. They gave him top dollar for the perfectly preserved guns. The ammo was something the store owner did not want. My son got it for $10. He got right at 1000 rounds of old Winchester and Remington 12 ga paper shells. Some slugs, buckshot, #4, #5, #6 and some assorted low base that just say 3-1/4 on the paper tabs. The shells are in beautiful shape and stored in old cloth bags. I wish they had the boxes. My question is do I hang onto them or can I use them for grouse hunting (lead shot)? Are these safe to use in my O/U? I'm sure paper shells may not feed well in my semi auto but should be great in a break action. Should I use them?