Gentlemen! Keep all the 10's, and 40S&Ws you want. My first Pistol Caliber was 9mm and so will be my last. I have owned .380s, and the Makarov Round as well, and would not mind having an old M-1911-A1 (Colt-made) just to have one, or perhaps the Norinco Copy. But 9mm is and always will be my Round. You have to stop where you feel comfortable. Plus, I told my younger Brother who loves 357Magnmum, Something he never thought of before. 9mm is a 354 in Caliber. He did not know it was that close. I wish we could get all the Police Rounds that are used all over the Country by Police Depts. but only Hornaday has one that we can buy our selfs, This is the Round used by the N.Y.P.D. called the Hazardous Duty JHP Round. 147 Grain. It is always good to shoot a more powerful version of your favorite Round, but I realize they can only improve a Round so far. Which is fine by me. By the Way, I have big Hands, and the Walther PPK in .380ACP hurts my Hands to fire it. because there is no Blackstrap on the Frame. However the PP and PPK/S I can fire all day in .380ACP Like someone said here it is what the Shooter can handle. I am lucky to have owned the finest 9mm Handgun in the World. the Walther.