02-04-2016, 02:33 AM
There is a "tolerance" in head spacing. I don't have a set of "go" and "no-go" gauges, so I can't measure the difference for you. But the tighter your tolerance is to the "go" gauge, the less slop you have in your chamber. Most "accuracy" builders try for .002" or less. Then as soon as you start firing the gun the threads start "stretching" and seating in, so you get a little more.
Hope this helps, like I said I'm not a gunsmith, just my understanding of how it works.
Here is a quick video, and according to him there is .004" difference between go and no-go gauges.
https://www.youtube.com/watch?v=KICBv-0U87Y
Hope this helps, like I said I'm not a gunsmith, just my understanding of how it works.
Here is a quick video, and according to him there is .004" difference between go and no-go gauges.
https://www.youtube.com/watch?v=KICBv-0U87Y