Handloads magazine did a test on magnum primers a few years ago and found that actually Winchester large rifle magnum primers were the hottest of the brands tested which included the Federal 215s. I have used them all and never had a problem with any of them but have tried to standardize my handloads with Winchester primers. That being said sometimes you use what you can find.
You can't just ship primers or powder. You must have a HAZMAT license for it. Some people have friends that are willing to let them use theirs. It is not the norm, all that said primed brass does not fall into that category. It is an option to think about. If you are in south Texas I would help you out.
Makes sense on the HAZMAT. I used to be an FFL dealer and had that license to get powder and primers shipped to my business. I didn't consider that the rules to buy and ship from distributor to retailer would apply to the general population.