Originally Posted by JC Smith
Have you ever had a problem with scratched dies?
Most likely, you were not lubing correctly and you picked up some brass on the sizing die.
That brass sticks to the die and then scratches every case you size.
Either that, or you had a burr at the vent hole.
The vent is right at the shoulder and is designed to vent off excess lube so you don't get lube dents.
The vent often clogs up if you use too much lube and acts just like you explained by locking up the locknut on the outside of the die.
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