Thread: Is this normal for my brass

On your brass yes. Drop a reloaded round into the chamber and see how much protrudes, only rimmed cases are entirely within the chamber rimless ones always have something hanging out the back.
What you are probably seeing is the difference in surface finish caused by firing pushingles the case onto the chamber walls.
With your paper clip also measure the depth of the case and compare it to where the line is, it may be the web, wall junction mark as well.