How come a sight or a scope of a rifle/gun is on top of the barrel, but still represents where the bullet will hit?
In: 2
Remember, a bullet isn’t a laser, it doesn’t fly perfectly straight.
You zero a gun to hit at whatever the sights are set at to begin with. If the sights/scope are graduated, and correctly designed, it should the hit a bullseye at the set distances afterwards by compensating for drop due to gravity.
If they are not adjustable (or when you’re not shooting at precisely the graduated distance) the gun wouldn’t hit a bullseye anyway, and you need to adjust your aiming point accordingly.
The only time it can actually matter is if you’re mounting a gun at point blank range to hit a precise spot, then you can just put a laser in the barrel.
TL;DR it doesn’t matter because of how aiming a ballistic weapon works. Bullets don’t fly flat.
The same goes for any other ballistic weapon, whether it’s a bow or naval cannon.
And of course this also ignores natral dispersion of any physical weapon.
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