Hello arcorob, welcome to the forum. Hope others will chime in on this subject as I am not the resident expert on this subject and there are a few opinions on the pros and cons of using other than a "factory' mag. I'm of the "con" group and do not recommend using non Bersa mags in any Bersa for other than target practice. I now own two BT 380s and have acquired 10 of the 9 round Bersa DLX mags and by personal choice, I only load 8 rounds and carry one in the tube. I have 3 mags for SD rounds. One each for both guns and a spare for pocket carry. The rest I keep loaded and use for target rounds. With a lot of extra effort and possible permanent damage to the fingers, the mag and/or the 9th round can be loaded. Buy yourself a Baby Upula loader and it makes the loading of all rounds a whole lot easier, especially if like me "Sir Arthur" has come to visit and taken up residence in your hands.