Thread: Resizing brass vertical marks on neck

Greetings Southerner223,
Looks like a die problem to me. Try a different die. Are you cleaning the outside of the cases, especially the necks, before you size. If not this could be you problem. I polish mine with steel wool and then a Chux to get them clean. Any grit is the enemy of dies. The marks form the H@K chambers go down past the shoulder.
Regards Grandpamac.