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What makes a bullet benchrest quality?

benchrest bullet quality
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What makes a bullet benchrest quality?

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First and foremost, quality jackets – the less total indicated run out (TIR) the better. However, .0003″ TIR jackets are acceptable. In fact, such jackets are non-returnable, as they are within tolerances for BR quality jackets. J4 uses .0003″ as maximum runout and Sierra uses .0004″ as the upper limit for TIR at the first datum point above the jacket base.

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