Did Kimber make two different K22 magazines for their Yonkers NY rifles?  I ordered two from Numrich/Gun Parts and neither will insert far enough for the bolt to pick up a round, but they do lock in properly.
I've miked the length from the top of the magazine to the cut out for the latch, and the two new ones are measurably longer than the magazine that came with the rifle.

The two from Numrich do say "Kimber" in script on the floorplate, but I can see no way to make them fit, so I returned them.

I've also read that Remington 511 magazines may work, but the pictures I've seen show them protruding below the floorplate, which the ones I got from Numrich also do.