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Canadian Firearms Practice · Question

.410 shotgun is described by calibre rather than gauge because:

The .410 is uniquely named by its bore diameter in inches rather than by the gauge convention.

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Question: .410 shotgun is described by calibre rather than gauge because:

Answer options:

  • It is a rifle ✅ Its bore is .410 inches in diameter (it doesn't fit the gauge system)
  • It uses metric measurements
  • It is prohibited

Correct answer: Its bore is .410 inches in diameter (it doesn't fit the gauge system)

Explanation: The .410 is uniquely named by its bore diameter in inches rather than by the gauge convention.

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