"...usually magnum..." The primer used has nothing whatever to do with the cartridge name. Has to do with the powder used. Powders used in the .44 Mag don't always need a magnum primer.
Buy a manual and read it. Partial to the Lyman book myself. Has more loads, using more powders and bullet weights than any bullet or powder makers book. Not that there's anything wrong with those, but they only give data for the bullet or powder maker's products. For example, Hornady's book only has data for Hornady bullets(mind you, yo uload for the bullet weight, not who made it). Hodgdon's only has data for Hodgdon, IMR and Winchester powders.