If you run dented brass into a full-length sizing die, the outside dimensions will be fine and the dent will iron out when shooting. Deep dents with a crease, however, like those on the right, should not be reloaded.
Despite the fact you’ve taken every precaution necessary and dilligently followedall the right steps, always check your cartridges. In this case a Dillon Case Gage is being used as a final quality-control measure for a 9 mm load.
You never know the history of the range brass you pick up. It may have come from the rifle of champion shooter Jerry Miculek, your buddy’s AR or some other rifle that abused it to the point it won’t pass inspection.