I'm on my first AI cartridge now. Earlier this year I bought a Ruger Ultralight online in .257 Roberts in advertised 'perfect' condition. Alas, the barrel turned out to have corrosion in half a dozen places. The perils of buying sight unseen. I knew my gunsmith had a .257 AI reamer so rebarreled to that. I already had two standard .257 Roberts' so thought I'd try something different. I wasn't really concerned with case life or extra speed but it was an opportunity to try a new cartridge that I haven't played with before. It was fun fireforming the brass too.
