Bushing dies if you are going for the most accuracy you can produce. .287 through .289 bushings (IIRC)
You can measure the thickness of your case necks, and the OD and do the math to get you a .003 neck tension, but just the same get the extra bushings one step above and one below you measurement.
You can measure the thickness of your case necks, and the OD and do the math to get you a .003 neck tension, but just the same get the extra bushings one step above and one below you measurement.
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