I own a beautiful S&W M48. Made in 1960. I love the K-22 and thought a .22 Magnum version would be nice. Well, it is.... but the extraction problems are frustrating. First six will extract with a firm rap. Second six might or might not. If you get those out and go six more... you will probably be taking the gun home with the brass in it. I asked about it on the S&W Forums and was told, "That's the way a lot of them are, you just have to live with it." I tried different brands of ammo and some were better than others.