I don't get it. I purchased Remington 2 3/4 inch 16 Ga bird shot rather nievely expecting them to be 2 3/4 inch. Looking at the shell it has 2 3/4 running vertically but horizonally it reads 2 1/2 inch along with the shot size and # of pellets. So I measured it and it's more like 2 3/8 inch. Why the inconsitancy in measurements? Thanks up front for some clue.