Headspace issue

[jmoore]

The M1917 locking faces are so slightly inclined that there's roughly a 100:1 force multiplication during downturn.

Besides, the "no-go" gage is used as a manufacturer's limit, not a user's limit. For that one should use a "field" gage.

Information

Warning: This is a relatively older thread This discussion is older than 360 days. Some information contained in it may no longer be current.

[Patrick Chadwick]

roughly a 100:1 force multiplication during downturn

5-10 kilos on the bolt handle = 0.5 to 1 tonne on the gauge. QED.

Hard luck on the gauge!