Hello Tom,

At this late date we can only speculate about why that pis is so long. It is easy to change pins without it being detectable but it should only be necessary if the barrel is changed or set back.

The pis is indeed long and I do not recall seeing this before.

These pins were sized to diameter on a centerless grinder so it was most likely procured outside and then blued. Thar was teh process for the Model H-D Military. What level of inspection they used is unknown but I suspect it
was on a sampling basis.

I have no specs for that particular part but somewhere I have data on pins for some later models and perhaps that will suggest the length tolerances.

Your measured scatter in length suggest to me that you have some different parts or perhaps some rejects that an former employee saved. Perhaps they were pinen from a completely different source.

John Stimson