A few years back a local gun shop owner died and when his sons cleaned out upstairs one of the things they found was about 70 or 80 cases of winchester paper shotshells all #4 and #6 shot and all 20 gauge.They put a mountain of them in the middle of the shop floor and sold them for 1.00 per box "no warranty expressed or implied"! I promptly bought 400 boxes and was 2 years shooting them up. All but a very few worked fine and the few that didnt were just weak.I might mention I didnt use these for hunting just for play clays.
