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weaver grandslam focus problems
A friend of mine has a 3-10x40 weaver grandslam which he is really pleased with but for the fact that he adjusts the focus to just right and after a couple of weeks of use he finds that the focus has shifted. It drive him crazy but the problen is there is no way I can find a lock ring to stop the focus from shifting while we are using it onthe hill.
Does anyone have the answer to this one?
Hamish
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