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Thread: Typical cold/clean bore effect?

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  1. 31-10-2019, 11:00 PM #2
    R93
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    Quote Originally Posted by MB View Post
    My 7mm08 (20 inch barrel) seems to consistently shoot about three inches low at 100 metres with SST 139g with a cold/clean bore compared to subsequent shots. Does this sound about right, or is there another possible explanation?
    My 260 AI with uncoated bullets does 3" low and 1 " left for 2 rounds with cold clean bore @200 so yup sounds familiar.

    When I coat my projectiles with HBN she is bang on but around 50fps slower than when fouled.


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