Thank you ShootDots. Depending on what supplier has to say and what action follows I might just have to get in touch with DJ.Necking UP does something to the case neck. Exactly at the neck / shoulder junction, you will see a "bump" or "fold" in the brass, once necked up.. This "bump", if not turned off, will magically disappear as soon as the trigger is pulled. However, what happens to it is that it goes INSIDE the case neck at the juncture of the shoulder, thus creating a donut right there. If you do not want that to happen, that bump needs to be turned off with a neck turner. My suggestion is that since you are asking this question, you probably do not have a neck turner. Send the brass off to DJs Brass Service (he is a sponsor on here) he will do an excellent job for you.