I had some Federal 200 primers purchased sometime in the 80's and the box said for small rifle AND small pistol. I used them in 9mm and .223. They worked fine, or at least I thought so at the time considering my lack of handloading experience back then. The 9mm loaded with Unique worked 100% in my duty S&W 439 and the .223 worked so-so (no pierced primers) in a pos AR I built from gun show parts. Thought I still had some in my stash but can't find them.