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Stag, it's where the excess headspace (if any) might be.
- If the boltface-to-chamber threshhold is outside of spec/too long*, then a thin web floor can statistically expose the case wall.
- If, on the other hand the bolt-to-chamber distance is OK, the remaining distance to case mouth is no big deal.
How does one measure that critical bolt-chamber distance ?
* e.g., chamfer too deep/long
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