noob question about ammo inspection

[Wichard20]

getting ready to go to the range and loading up some magazines I noticed couple boxes of my brown box xm193 lot 221, most of the casings have dings. Some casings have multiple dings, but the majority only has 1 or 2 dings on the casing. Whats the rule of thumb here? I rather play it 100% and not use the ammo but I just want to make sure its not me just being OCD and should not worry about it. The majority of the ammo, the ding is very slight and only noticable in the light. Another thing I noticed is how dirty the casings are, I guess from the grease or whatever of the machinery. My other xm193 is blackbox, and they all inspected good and no dirty casings.

edit - I think I found my answer, I read someone its been comon of federal not to polish up the ammo and dings are normal. Performance is not affected unless its really dinged up.

Thanks,
Rich