I bought a Kimber .22 conversion unit early this spring and have been shooting it in our weekly Speed Steel matches. I bought ten Kimber magazines for it and they all work just fine. (Six magazines are the absolute minimum for our matches and I wanted to have a few spares!) I've been shooting Federal Gold Match #711B standard velocity ammo and it functions just fine. I put it on a Colt 1911A1 frame that I had used years ago with a Kart conversion unit for bullseye shooting. The complete frame had been tuned by a gunsmith friend for using the Kart and standard velocity ammo.
In short, I have been very pleased with the Kimber. It was reasonably priced, the magazines were inexpensive and seem reliable and the gun shoots quite well enough for what I want to do with it.

- -- Buckspen