I just received some 45acp brass in trade today, most of it looks to be older winchester brass. My question is: most of the brass has a slight ring part of the way up the case, is it safe to reload these?

The majority of them just have the visible ring on the outside, but a few have a pronounced groove where the case pushes in on the inside as well. I have some powrball ammo in 40s&w that has the same type of ring, I'm assuming it's just a crimp to hold the bullet in place?

I'll try to get a picture later of that brass.