Recently a couple of range rats showed up with identical Keystone .22s. I have to say, I was impressed with the quality. Nice wood, fit and finish.
One of them, however, kept getting misfires. After a bunch of twiddling around swapping bolts and such, he finally called Keystone. They got the serial number, identified a known issue, and had a new one on the way.
Might have to give one a shot when I get bored with the status quo.