Quote Originally Posted by m12lrs View Post
i use forster lock rings.

you can't tighten any of them with them screwed down tightly to the press. When you do it will hold that die tightly to the press kind of wedging it in there but it doesn't tighten the lock ring into the threads of the die. when you break it loose the ring turns on the die.
Yep

If you find your setting and carefully back both the lock ring and die out of the press, without changing their relationship, a quarter turn then you can actually tighten the lock ring into the threads of the die.

beware of lock rings that use a set screw that goes into the threads of the die. crossbolt lock rings are best and i feel the forster lock rings are the best of those.
I have found that with many of my dies I can reduce neck RO by using and o-ring under the nut. this allows minor adjustments to be made when I am getting it set up. An index mark with a Marker on the press face and the lock ring allow me to repeat the setting.