I am a rookie loader. I was looking at loads in my Speer manual for .243win, it makes it very clear only to use winchester brass because of possible high pressure. My question is, is winchester brass that much stronger than others? Like I said, I am a rookie, and I don't think I am experienced enough to just guess on components, but I don't have any winchester brass, only federal and remington. I have a hard time believing that winchester brass would be that much better.