The Firing Line Forums - View Single Post - Measuring the case thickness of the neck?

muggsjunior · March 25, 2013, 01:35 PM

I don't own a ball micrometer, yet, so I use a machinist's magnetic base with a dial indicator. I nestle it up to my case trimmer, and after sizing my cases, I put a case in the trimmer and rotate it while the dial indicator is positioned against the trimmer pilot and, therefore, the case neck.

This only works after resizing, or more specifically after the expander ball has made the inside round, pushing all excess material outward to be read by the dial indicator. It's not as accurate as a ball micrometer, but its the same principle as the Hornady and Forester gauges.

March 25, 2013, 01:35 PM	#6
muggsjunior Junior Member Join Date: December 23, 2012 Posts: 13	I don't own a ball micrometer, yet, so I use a machinist's magnetic base with a dial indicator. I nestle it up to my case trimmer, and after sizing my cases, I put a case in the trimmer and rotate it while the dial indicator is positioned against the trimmer pilot and, therefore, the case neck. This only works after resizing, or more specifically after the expander ball has made the inside round, pushing all excess material outward to be read by the dial indicator. It's not as accurate as a ball micrometer, but its the same principle as the Hornady and Forester gauges.