Below you can find the A 12-this shotgun has a bore of 18.52 millimeters Jeopardy Words Answer. The answer to A 12-this shotgun has a bore of 18.52 millimeters has 5 letters. This clue belongs to the Measure twice category and is part of Jeopardy Word Level 892. If you scroll near the bottom you will find other clues and answers part of level 892