All of my reloading dies were RCBS until a while back. I made a trip to the gun shop to buy a set of dies for 7mm STW with RCBS dies only on my mind. This is a large gun shop with about every thing you need for shooting and reloading. They had a full selection of Hornady New Dimension dies and very little in any other brand. I asked one of the employes that has worked in there for several years why few dies except Hornady, and he told me I needed to give them a try. I bought a set of the Hornady in 7mm STW and was very impressed. Since then I have only bought one set of dies (6mm) and they to are Hornady. These Hornady dies will be my choice of dies from now on.
I paid less than $40 each for the two sets of dies. I purchased a micrometer seating stem for about $25 that can be used to replace the factory seating stem, and can be changed in a few seconds to different caliber seating dies. This is the easiest and best system I have found. I take my first bullet and seat the bullet long, measure it, find out how many thousands more I need to change it, dial it down on the micrometer and it is right there.
The seating die also has a sliding sleeve that holds the bullet in alignment during the seating process.
Has any of you tried these dies? What did you think of them?