Example: When a factory barrel is reamed for an AI, say 243AI, and needs to be set back say, .004" (per another thread), that is approximately 24 degrees of barrel rotation at 16 tpi.
If my calculations are correct, if there is factory engraving on the barrel it will be out of place, maybe even under the stock.
How are barrels setback for headspace and the engraving re-aligned?
As stated it's just math ...1 / threads per inch on tenon = set back in thousandths. That will index the tenon in perzactly one turn.
