I tried to do some research on that, the "CI" brand, but my search engines only returned "CCI". It's a banner/notice/ad headlining this, NWFirearms, site. It flashes and stuff. It's available! The thing is, I thought only .22 mag (when it comes to rimfire .22) is actually "jacketed".. with a true jacket, and all .22lr is "coated" with a copper dust (lest it's straight un-coated lead). It'd likely get stuck in your barrel I'm sure, were it actually jacketed, in the conventional terms. It seems to me that "CI"/Brownells is taking license with the "jacketed" term. Pray elaborate.