Hi guys last week I traded a rifle I had for a P7 ,haven't been to the range yet but looking forward soon. I did have a couple questions first, I read a post somewhere on line where someone said not to use +P or +P+ ammo apparently this guy was a police officer and he said one of the officers was using +P at the firing range and the slide flew off and hit him in the chest he claims they do not use +P ammo anymore. So before I go out and buy some ammo was wondering is this true. Also about the grading I have read where there are several grades A,B,C ,on my cardboard original box the bar code reads "P7PSP 9MM VG-EXC BOTTOM", does anyone know if that is the grade and if so what letter category would this fall in? This pistol is from Trussville AL Ser. # 377xx.Thanks.