Bore Scope

Last I knew, Bruno Shooters Supply had the best price. Won't tell you if you have an accurate barrel or not. Will tell you about wear, and/or potential problems, and if your cleaning regiment is working or not. If you cut chambers, it can show you much about your work.
 
Be careful that you don't let the sharp edge of the bore scope's tube scratch the barrel's surface. That can result in trapped copper and inconsistent groups.
 
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