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Which of the following shotgun barrels has the largest bore diameter?

  1. 10 gauge

  2. 12 gauge

  3. 16 gauge

  4. 20 gauge

The correct answer is: 10 gauge

The 10 gauge shotgun barrel has the largest bore diameter because gauge size is inversely proportional to bore diameter. In other words, as the gauge size increases, the bore diameter decreases. The 12 gauge, 16 gauge, and 20 gauge all have smaller bore diameters compared to the 10 gauge. The 12 gauge is the most common gauge and offers a good balance of power and recoil, while the 16 gauge and 20 gauge are less common and offer less power than the 12 gauge. Therefore, the 10 gauge is the correct answer for the largest bore diameter.