My son took a job bartending and closing a drinking establishment in a large American city, in a so-so neighborhood. There was always a chance that something unhappy might happen at the end of the evening, so he started carrying his SS .40 (with a nod and a wink from the local LEO's with whom he was friends). I transferred a KT P-11 to him, suggesting that the extra 3 rounds might be important. For no good reason, I didn't send along any ammo. He showed me the mag tonight, stocked with very worn and very mixed reloaded ammo from a friend, not one round of which was the same height as the other. I immediately confiscated that lot and dug a box of Winchester WB FMJ out of the stash for his use (I've used WWB FMJ in my own P-11 very successdully). Dad's rule: never use reloaded ammo and never mix ammo brands in any magazine for a gun used as SD or HD. Am I right or wrong?