In my reloading I try very hard to make sure components are exact for any batch of reloads I make. I just purchased a couple of boxes of Remington .243 from Walmart this weekend and after opening the box found they had used to different types (colors) of primers in the same lot. In over 40 years of hunting I have never seen a box of ammo contain 2 different primers. This isn't a complaint, I just found it a bit odd. There were 5 silver primers and 15 gold in this box.