I've seen these wall thickness gages before, but have never heard of any feedback on them.
On the Hosford gage, you have to hold the ring, and I guess make sure you stay parallel with the barrel for a good reading.
On the Galazan gage, I like the idea of it being vertical, but you still have to keep the barrel parallel for good readings.
Does anyone have either and what are your thoughts? I plan on making one or the other, and I kind of like the Galazan's for having the 3 different rods for different gauges.
On YouTube, Larry Potterfield used one similar to Galazan's but only had one post and the breech didn't rest on a tapered cone to fit the chamber bore. I would think this has to be in order to get repeatable readings. Maybe I missed something. The company was Newbolt and Thorpe, not sure if that is the correct spelling.
