A friend bought several boxes of Sears centerfire rifle ammo at a estate sale. Specifically 30-06 180 gr. SP. Found plenty of references to rimfire and a few shotgun shells. Does anyone know how to read product codes, approximate value, etc. I can't figure out how to post pics, but there is auction on Gunbroker with the same ammo. Don't know if I would break the rules by posting the auction or the reference number so I will not post it. I just need a bit more info on that particular item. Reached out to several gun friends so I thought there must be someone here to give me info or a place to look.