I'm sure this has been addressed hundreds of times, but I have a question regarding reloading 45 ACP. I recently picked up a 45 for Christmas, along with a box of American Eagle 230 grain bullets. Upon review, I noticed they bullets have large pistol primers...I know some other 45 ammo brands do not. Why are there differences, and, as a re-loader, what advantage does one have over the other, if any?