Yesterday I was at the range with a granddaughter shooting a new to her Browning A-Bolt in 270 Winchester. I have load a bunch of training loads for her using -06 brass, commercial and military. I prefer the military because it does not say -06. We did not leave any brass behind.
But to the point. There has been a few times that I have forgotten and left cases tumbling over night. They come out look better then fresh factory cases.
Neck sizing might leave few marks on the case.