09/25/2026
WORDS OF THE GUNROOM | .410 Bore
You’ve probably heard both “.410 sh***un” and “.410 bore.”
There’s a reason.
Unlike 12, 16, 20 and 28 gauge, .410 is identified by its approximate bore diameter in inches.
British sporting terminology commonly calls it the .410 bore.
One little phrase—and a clue to an entirely different system of sh***un measurement.
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