Yeah, Hornady Critical Defense or any round using the XTP bullet generally works well. I carry Underwood extreme defense, I think that’s the name...the copper flute design developed by Lehigh after the extreme penetrator. As for your problem. I’m wondering if all the rounds in the mag were doing that (sounds like nosediving) or just the top rounds. I used to have nosediving issues but after breaking every thing in, including tight mag springs, it went away. Check out Magguts too, Enables you to put an extra round in your mag. Some say it improves feeding too. Good luck My P380 is one of my favorite range toys.