Bolt depth and ejector marks

[mtnlvr]

[quote=WestMOhunter]Good point on questioning accuracy of my equipment. It’s certainly possible there is error as it’s just a cheap digital caliper. Having said that, it measures very consistently and precision is to .0001...]
You have a cheap caliper that has resolution to 0.0001"? Most of the calipers I've seen, even quality ones, only display resolution to 0.0005".