AND -- you can convert 223 brass to 222. Here's a link to the youtube video.
I've not done it, but I do have a bunch of these conversion brass that I got at a gunshow, and they shoot fine and just as accurate as my standard .222.
I've had my .222 in Rem 700 since 1979, and have shot probably ten plus thousand rounds through it. The barrel is badly eroded for about 12" past the chamber, and it still shoots sub MOA. The little 36 and 40 gr. V-Max seem to have breathed new life into my groups. I spose this fine little rifle will be with me till the end, and I don't spose It will ever be obsolete. jd