I have a smith & Wesson m&p shield 9mm, and bought some federal premium ammunition for it 9mm Luger +p 124 grain. Will I be ok to use this ammo or will it mess my gun up? I’ve read a bunch of different things about +p ammo and +p+Welcome aboard! Shield 9 eh? Nice!! Good advise by FlaRon. I like how the Hornady Critical Defense 124 round penetrates
before expanding. Good to get through heavy winter clothing. Hope you only have to use it on "paper!"