ya as taylor said, they likely have a crimpI hope the norma 375 weatherby brass I just bought is good to make 416 rem mag out of should be .I use to get bulk rem 416 brass and alot of them were damaged so bad you couldn't reload them.The brass was also so soft in tje 416 rem brass I could bend it with my fingers .I have a whole case of 500 rem 338 win mag brass that's so soft I can't use flat based bullets in it .I can't find and 338 win brass so I am necking up 7 mm rem mag brass .The norma brass of past years was some of the best brass I ever used .I have a bunch of 416 weathetby norma brass you can run it over with a truck won't bend it .Starline brass has been awesome in pistol brass ihave not tried the rifle stuff yet .I have some federal 308 brass that will not size or take primers it's super weird has blue ink on the primers .I split tons of 264 win mag brass it's been the worse of anything .
there is a good chance that 308 or 223/556 brass was crimped unless it had been bought new.