I have a MP 40 full size and love to shoot, but I have to buy my own ammo and even the WWB hurt a little at 23 dollars a box. I purchased a walther P22 the other day and love this little gun. I bought 550 rounds for around 10 dollars and shot a ton and barely made a dent in the box of shells. I was really able to concentrate on my mechanics and when I picked up my 40 I really could tell that what I was working on with the P22 was carrying over to the 40. Any one else use a .22 pratice pistol and what kind do you use.