Recently I was asked at a local gun show how long our rifle scope held zero. And I didn't have a conclusive answer tbh. All I could say was months if you are using it and handling it with a few bumps and bangs, but if not and you are very careful it should lasts years. 

Poor rifle scopes will lose zero simply after using them, which is not good. Ours thankfully is not that way! 

Shop a quality reflex red dot scope here.

Holding zero refers to the ability of a rifle scope to maintain its point of aim, or the point where the crosshairs are aligned, after being adjusted and zeroed in. When a rifle scope is zeroed in, it is adjusted so that the point of impact, or where the bullet hits, matches the point of aim. Once a scope is zeroed in, it should hold zero and maintain that alignment, allowing the shooter to accurately aim at a target without the need for constant readjustment. If a scope does not hold zero, it means that the point of aim and point of impact are no longer aligned and the shooter will need to readjust the scope before taking a shot.