Bought a Sig Sauer 1911 .22 in Dark Earth with Walnut grips recently at a gun show. IT IS AMAZINGLY ACCURATE. The magazines are ten rounders but I altered the follower to make them twelve rounders, with no change in performance ... so far. I shoot a few hundred rounds each month in my garage, into a steel bullet trap. I don't go higher than .32 acp with the trap. Nut .22lr, magnum, and 32 acp is enough to keep the eye/trigger reflexes honed. I also shoot a 22 conversion system through a piston AR into the bullet trap.
I'm kind of surprised that no one has yet come up with a .22 magnum conversion for the AR platforms. Maybe Ruger will put out a takedown in .22 magnum soon.