Without wishing to spark another huge long .308/7.62 thread, I have a request for factual information:

Does anyone have a good drawing/diagram of the way .308W and 7.62mm gauges relate to the respective chambers?

I was specifically after a drawing of the actual datum points - i.e. middle of shoulder, front of shoulder, etc - for a standard weapon such as a rifle.

Would also like to see an EMER drawing or similar of any gauge that happens to be specific to a weapon system, if it differs from the rifle datums.

(I know that there are different 7.62mm gauge limits for different weapons, but is this due to different datum points (maybe necessitated due to chamber wear patterns) or different headspace specifications (i.e. bolt body positioning/rebound in an MG)?).




Might be a good idea for a sticky? I.e. no discussion/ no debates, but a list of diagrams, specifications and military instructions only - which we can use as a factual source data.

Maybe if someone is an ace at AutoCad we could produce a set of master reference drawings?
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