If you notice the guy dosn't mention the manufacturer. I also don't buy the statement that guy down the firing line just so happens to be firing the same ammo from the (SAME LOT). Now what are the chances of that. With out having the actual cases to measure and test the hardness (you would need proper equipment to test the hardness of the brass)we will never know. They could just go out and buy a box of hornady or some other brand and see if the cases develop the same split.