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Slugged my bore

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So I finally got around to getting Cerrosafe so I can find out my bore and chamber dimension on my stuff. My .308 Saiga slugged out to .3105. Is that normal? By comparison my Russian Izhmash Tiger in 7.62x54R slugged to .312.


BTW the steps I took was to plug the barrel about 2 inches from the muzzle, pour in the molten Cerrosafe and popped it out after it cooled. It's now 9 hours later and measured on the raised portion of the rifling.

Edited by herr67
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totally normal, the russians measured their 7.62 on the lands


Americans measured the 7.62 in the grooves.


thus the russian 30 cal is actually slightly bigger. (IE. closer to the american 32 ACP)


The 7.62x51 being an american bullet is slightly smaller diameter than the 7.62x54R bullet

Edited by santanatwo
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