Hornady Critical Duty 9mm 135 GR Flexlock in my Steyr M9-A1 and also in my Kel-Tek P11. I contacted my local police departments to determine which ammo they use to minimize any issues should an issue ever arise. This is on the advice of several conceal carry instructors I've spoken with and with the legal group I joined through the NRA to provide a lawyer should I ever have to use my CCW for self-defense - shoot what the locals shoot. I like the way they shoot with minimal flash and low recoil. I can get back on target quickly and in low light shooting situations/drills I've never been blinded to the point I cannot see my target after shooting a few shots. Heavier rounds in the Kel-Tek kick like all get out and re-establishing my target can be difficult, these are solid performers in my opinion.