the other day i was out to pick up some range ammo and i decided to also pick up a box of winchester pdx1 9mm since i could not find the speer gold dots that i wanted in any of the gun stores around. i forgot to even check the box before i made my purchase. i came home and opened the box to find several cases with what almost looks like rust spots on them, dents around the tip lip where the bullet is at. i have never purchased this ammo before. is this normal? is the ammo bad? should i not carry i in my edc or even shoot it at all? have others also found this on their pdx ammo or other brands. whats up with this...