Yes folks, another newbie question… This time, about primers. I have been reloading shotshells for a while and have decided to delve into reloading brass. Recipes for shotshells are very specific as to what components one must use. For example; I f I use Winchester 209 primer with powder ‘X’, I must use wad ‘Y’. If I change the powder or the wad, I could end up needing Federal 209A primers. However, except for using the correct size of primer (Sm. / Lg. Pistol, Sm. /Lg. Rifle and the magnums), I am not seeing that using a specific manufacturer over another with given powders is critical. I have the Hornady 9th Edition, and under any given cartridge they list a specific primer with several different powder options. Hodgdon will list several powders but does not call out a specific primer. I am still waiting for my Speer manual. So, is using one manufacturer’s primer over another, with a given powder critical, or is only the size of the primer the critical issue? Thanks, in advance, for your advice.