Thread: Strange marks on brass

I once had a very small mark appear on the shoulder of my 223 brass after firing. It was a very small depression which I found was caused by a bit of muck in the chamber.

What I am seeing on your photos are the opposite ie not depressions. The only time I have seen that is with a rifle that had serious corrosion in the chamber in the shoulder area. Out of interest, does exactly the same pattern appear on each case? Myself I wouldn't be using them.

The other thing is that a verticle split at the base in your first photo? If so she's only good for the bin.

The big dings in the rims indicates a rough life. Once fired mmmm.....?