I have been hand loading for about a year and I love it. I am still very much one to follow the load data sheets. Recently I bought some Large pistol primers that were labeled as for both Standard and Magnum loads. This is the first time I have seen such labeling. The Cabela's sales person confirmed that these are in fact OK for standard loads. My loads are square in the middle of the load high and low limits. However, none of my load data give details on using magnum primers for my standard loads. I have seen many conversations on this forum warning against using Magnum primers with standard loads. I am loading .45 ACP. Are the primers I bought legit for standard loads? How can the primers be both standard and Magnum primers at the same time? They are either/or right? I am confused and feeling a little silly for allowing myself to be talked into buying these things. The primers are Winchester Large Pistol Primers.