I try to eliminate as many variables as I can when shooting rifles, revolvers and shotguns to maximize accuracy. I establish a cleaning protocol to minimize shot to shot variability and unless I'm reloading, in which case I have control of components, when I find a given lot number of shot shells which produces the "best" turkey hunting patterns I load up on that particular lot number. I've seen a significant amount of variability in EnvironMetal shot shells as components have been changed and by purchasing a single high performing lot number you significantly decrease variability. In my experience, buying shot shells per lot number definitely has produced positive performance results.