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USA-Made Shotgun Bore Mic: Precision at Your Fingertips! Discover the best shotgun bore mic on the market, proudly made in the USA. Our bore mic is an essential tool for shooters who demand precision and performance. Whether you’re a competitive trapshooter or an avid hunter, this tool allows you to accurately measure the interior dimensions of your shotgun barrel for optimal patterning results. Designed for durability and ease of use, our bore mic ensures you can fine-tune your shotgun with confidence. Perfect your shot, one precise measurement at a time.