I ran into a compatibility issue (misfeeds) with the Hornady Critical Defense ammo and my Springfield XD-S 9mm. Nothing wrong with the ammo; apparently it’s just a glitch with the XD-S. After it happened, I did some web searching and discovered that I wasn’t the only one. I also have an XD Mod.2, and both of the Hornady products (Critical Defense and Critical Duty) worked flawlessly in it. Interestingly, I’ve never had an issue with any other ammo (FMJ or JHP) with either of the firearms.