Thread: Headspace
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Old December 29, 2018, 01:38 PM   #16
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Join Date: June 17, 2010
Location: Virginia
Posts: 5,382
Headspace dimension (chamber) is:
- The distance from the bolt face to the chamber point that stops the case from entering (be it the rim, the belt, or the mid-point shoulder)

Headspace dimension (case) is:
- The thickness of the rim (or) the distance from the case head to the front of the belt (or) the distance from the case head to the mid-point shoulder -- again whatever stops the case upon entry.

Both dimensions have manufacturing tolerances (±) that are 'supposed' to functionally mesh in action**
As an engineer, that's I care to know, need to know, and/or use in the real world.

(Take it away Guffey !!!)

** Notwithstanding that pesky real world again:

Last edited by mehavey; December 29, 2018 at 01:46 PM.
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