at least two.. ;-) who would like free, supervised use of the gauges, let me know. You will have to follow this script:
Cartridge head space (testing).—To check the distance of the bolt face from the cartridge belt seating remove the ejector, extractor and bolt ring from the breech bolt. Insert the head space gauge, through the ejection opening, into the chamber of the barrel, assemble the bolt into the bolt-way and push forward. Rotate the bolt into the locked position by applying light thumb pressure to the lever.
The head space is satisfactory when the locking action is completed when using the •4-in. gauge and incompleted when using the •41-inch gauge.
It is insufficient when the locking action is incompleted when using the •4-in. gauge, and excessive when locking is completed when using the •41-in. gauge ; the former condition is probably due to burrs or foreign matter and the latter to excessive wear.
Cartridge head space (testing).—To check the distance of the bolt face from the cartridge belt seating remove the ejector, extractor and bolt ring from the breech bolt. Insert the head space gauge, through the ejection opening, into the chamber of the barrel, assemble the bolt into the bolt-way and push forward. Rotate the bolt into the locked position by applying light thumb pressure to the lever.
The head space is satisfactory when the locking action is completed when using the •4-in. gauge and incompleted when using the •41-inch gauge.
It is insufficient when the locking action is incompleted when using the •4-in. gauge, and excessive when locking is completed when using the •41-in. gauge ; the former condition is probably due to burrs or foreign matter and the latter to excessive wear.
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