Setting a rifle or handgun scope to optical zero before installation.

By GunsmithG
Greetings, all. Here's a little info that I've found useful. This is something I would always do, even to brand new out of the box scopes before installing on the intended firearm. Every modern rifle or pistol scope that has internal adjustments has an optical zero point, that is, where the adjustments for the point of impact are centered with the tube, giving you the most adjustment

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