[Unclenick]

Forster has no floating stem dies I am aware of. I think maybe you mean the decapping stem. The Redding Competition Seater has a floating stem (moves freely in the horizontal plane over a short distance.


Chainsaw,

The Redding Competition Seater Die just mentioned is the only one I've seen that can actually reduce overall concentricity below the runout of the neck wall. I highly recommend it. When you get it, disassemble it completely and soak all the lubricant off in mineral spirits. Then put them into fresh mineral spirits with 10% ATF added to leave a thin lubricating film after it dries off, then reassemble. A 72-hour soak in Sprinco Plate+ with excess wiped off afterward is even better.

A neck reamer will not produce concentricity unless you have a way to lock it into a concentric relationship with the outside of the neck. Otherwise, they tend to just self-center and cut away brass evenly from the inside, leaving the neck wall uneven. Inside neck reamers are for removing internal donuts at the neck and shoulder junctions or for removing excess brass after necking a case down from a larger caliber. If you want the neck wall uniformly thick, you need an outside neck turning tool.