I have a .22 B40 that was bought from, and tuned by, MM. I had to remove the rollover comb on the stock to make it ambidextrous. I gave the stock a bedliner finish afterward bacause the wood wasn't quite nice enough to justify an oil finish, plus, I bought it for hunting. The bedliner finish is nearly indestructible. Mine gets right at 725 fps with RWS superdomes. It's not really broken in yet, either. I haven't shot it much at all and not at all since around Christmas. It's a good shooter.