If you want straight bushings, my experience has been that the carbide bushings, are much better, due to the difference in how they are made.

The other issue steel is whether the hole is cocked in relation to the ends. You can ask Speedy about this.

Technique can also play a role. While sizing a case, if you pick up the bushing and tap the retainer with it very lightly, and reverse your stroke ever so slightly, that will allow the bushing to recenter for your up stroke.

A friend checked his two Rock Chuckers and found that the top of his rams were holding shell holders slightly off center. He modified shell holders and the top of the ram, on his lathe, and the concentricity numbers got noticeably better.

Another friend was using a lube pad that was designed for one kind of lube with another, and it was going on the cases unevenly. Switching to lubing with his fingers showed significant improvment.

I did an article on letting a FL (bushing) die float in the press threads, and for that combination, that made a significant difference. The point is that there are multiple sources and solutions.

If I got .001 runout on a case neck of a case that had been fired and was sized in a FL die without the bushing, based on experience, I would look beyond the bushing, and for that matter the die.

I don’t use the decapping assy on the FL dies and I decap and tumble before sizing anyway. Without the decapping assy the locking nut is not there and the bushing can travel up, not sizing the neck. So I was using a Newlon stem and a washer to set the bushing at the desired height.

In hindsight: I sold the newlon die that the stem belonged to, so had to put back the original redding stem a week or so back.

After Jim’s kind not to check this, I measured the redding stem and found out it wobbles .004″, so this is indeed the cause of the runout I have. But because prior to this I had always used the newlon stem (.0005″ runout I just checked), I never gave it any thought as I never had issues with my 6×47 dies before. Hence I was baffled that my 6×47 now also shoowed a lot of runout.

So the cause of all this is the stem that holds the top of the bushing, and changing something that you don’t think twice about to cause issues like this.

Still working on finding the cause. I no longer have any custom dies (sold two rifles, waiting on new ones). I’m pretty sure these custom dies were well within the same .0015″ as you were seeing. Maybe I’m just now noticing it on the factory Redding dies.