Don't feel bad, my 350 Remington Mags are in the same boat.
I stocked up a couple of years ago, so I have about 550 rounds of brass for it.
I wouldn't consider it a wildcat, but RCBS will sell you a set of dies for the same price as a wildcat, and if you want brass you have to form it same as a wildcat. If it waddles like a duck, and quacks like a duck it must be a duck......