I took my LC9s to the indoor range for the first time and put about 50 rounds through it, also dialing in my laser accuracy. Also brought my Bersa Thunder 380. The first mags on both guns were loaded with Hornady Critical Defense (CD) to get a feel for any kick difference compared to the Remington UMC Centerfire rounds I used for the rest of the firing. My Bersa fired beautifully and accurate. The LC9s fired great during my first round using the CD's. However, it jammed twice on two separate occasions using the Rem's. The first jam occurred after firing the first round of Rem's in which the slide did not close all the way, leaving about 1/8" to fully closed. A simple tap on the back of it closed it and readied it to fire again. The second jam left the slide completely open with the spent shell still in the back of the barrel having not ejected, and the next live round tilted slightly upward in the magazine. With that, I locked the slide open, ejected the magazine having to assist it with my finger from the shell ejector opening due to the next round having been partially sprung forward into the barrel, then tilted the gun backward to remove the spent shell. I got home and researched a little online finding this video that describes the exact issue I was having, however not with the CD rounds. https://youtu.be/mIZTVfIuGgM I physically tested the issue like he does in the video proving that yes, the first couple of rounds hang-up with the feed angle off a bit. It's very disheartening. I read through all the comments and they vary from the magazine design (which I have one of both, the Made in USA and Italy) to the type of rounds, precisely the Hornady CD's. Some recommended to stay away from those on this gun due to tolerance differences. Others recommend the Gold Dots. I'd like to hear from anyone who's had this similar issue and if you determined the magazine design was at fault or the particular rounds.