there're NOT, they were, then they were NOT, they might be again , ? , or maybe they stayed the same and CCI got hotter , ? the last testing I saw showed Remington being hotter than both CCI or Win. . another thing is heat -vs- burn time , common sense would tell us that CCI has a mag primer and a standard primer , and Win has one that work for both , that the Win falls in the middle , well common sense would be wrong ! and I may be wrong here but if I remember right , the either/or Win primer is not hotter , it has a thicker cup and a longer burn time , , testing has shown up to 2000 PSI spike when switching from brand to brand or even lot to lot , with some powder. yet stayed the same with other powders , as other have said you are not at max , I'd go ahead a use then with no worries,