Thread: Redding S Type Match Dies - Bushing or not?

So what you're saying is you loaded up using new brass. This brass is yet to be sized?

If you still have any rounds loaded measure the outside diameter of the neck. Measure in two places 12 o'clock to 6 o'clock and 3 o'clock to nine o'clock. If your brass is good quality you should get close to the same readings. Average the measurements. I usually deduct 2 thou to determine the bushing size.
With springback that usually gives around 1.5 neck tension. As the brass hardens and if you don't anneal the springback and neck tension will change. You either anneal or select a different bushing.

A lot of gunsmiths only stamp the neck dimension on the barrel if it is a tight neck. Yours may be different and the smith may have stamped the std neck dimension.

Edit: I see you have posted 298.