I exclusively shoot 16 ga for upland hunting, never had trouble getting shells here in KC, until last year Rogers always had them on the shelf, Cabelas too. I have never hoarded or panic bought, but I do tend to buy in bulk when they are on sale, so I generally have at least one season’s worth on hand. Last year I decided to shoot out my lead loads and eventually switch to nontoxic for upland hunting too, so I bought a box of Boss. This year I think I may do a little duck hunting with their 16 ga shells or Kents.