Ok, another reloader newbie question -I've now loaded about 9,000 rounds (getting better with each thousand) and got to a box of primers I purchased when they were more difficult to obtain. I noticed they are Magnum small rifle. I'm loading .223 I can't find in any of the recipe books or the powder manufactures load charts saying anything about magnum primers. Do you use less powder or change anything? I would assume magnum means a hotter iginition? Funny, but I don't think I paid any more for this box than I did for the regular ones. Thanks for your advise/help in advance.