I too must confess, about 3 year ago I owned 1 Springfield Armory XD9 and XD 40. I told both to the range. I was shooting the 40, it felt a little lite less recoil, I fired a full mag and when to check the target and all holes were no where hear a group and all the holes were elongated. when I got back to the bench I started to pick up my brass and they were all split. The bell still had not gone off. I fired another mag same results. Then it hit me 9mm out of a 40cal. I checked the gun over and found no damage. I learned a valuable lesson, I keep ammo and guns together when I get to the range and only one gun on the bench and always , always check the ammo for right gun. You really have to watch your self when you have 2 guns that look the same and the mags fit in both guns.

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Carpriver.