Re: Lee collet dies--inconsistant neck tension
The Lee collet neck die is all I use for neck sizing. In fact, it's all I use for sizing, period. When my brass gets too large to chamber, which is usually 6 or 7 loadings, I toss it and start over with a new batch. I haven't used a full length die in 3 or 4 years. If I do need to move the shoulder back a bit, I use a Redding body die, but this is very rare.
The Lee die is not perfect, however. I have found that they perform quite a bit better if I polish the collet and collet sleeve where they contact each other and apply a dab of grease around the mouth of the sleeve. From the factory there is often an excess of tooling marks and when these are removed the die operates to it's full potential.