I have a Colt .38 auto pistol , I was at a gun show and picked up some Aguila .38 auto ammo . I know the .38 super ammo is the same dimentions and all .38 super ammo now is stamped .38 auto +P. When did they start stamping it .38auto+P to avoid confusion ? . Now the question, do you think I have plain .38 auto ammo that is safe to shoot in the Colt?