Nothing wrong with the caliber as it's been working like the Timex watch for close to a hundred years. If you're new to the S.A. autoloader (NOT SEMI-AUTOMATIC--A Klintonista term) game, take the time to enroll in one of the many good schools available to learn your gun. One thing, the ONLY proper way to carry a 1911 copy is to carry it Cocked and Locked; ie, round chambered, hammer cocked, and the thumb safety on (fully up position). If this scares you, then get another gun.