| I have tried making a mold of a backbore using Cerrosafe. This is something gunsmiths use to make a cast of a rifle chamber. It can best be described as a soft type of lead when hard. You plug one end of the hole you are going to measure, pour it in, and after it hardens, you just pop it out iwth a wooden dowel. Problem was, to my naked eye, I could not see much difference between the 2 backbores I was trying to compare (a 7 and a 24).
Some of the high-end gunsmiths are also getting digital scanning machines and CNC lathes, so Cerrosafe may be a thing of the past too....
M. |