I have two sets of new RCBS 243 dies.
On my first set the seater plug leaves a ring on the bullet where it contacts it. Not only is it visible I can feel it. I cannot seem to adjust it out and it is with three different types of bullet, ballistic tip, BTHP, and interlock

On my second set it leaves no mark and I adjusted it the same way, per the instructions.

Is it just me or could this be a manufacturers defect?

Also, why did they put that stupid brass screw to jam lock the ring, I have an older set of 300 and it has a lock ring that squeezes the ring and it works WAY better.