I've come across 1 red dot that had the dials moving the sights in the wrong direction, never seen a scope do it.
Bore sight tools are a waste of money, even on guns where you cannot see through the barrel. I've never needed more than 3 shots to zero a bolt gun. A lever or any other gun requires at most 1 more shot. I'd have to zero a dozen rifles a year for quite a few years just to break even on the ammo costs at that rate.
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