Request for bullet drop formulas

I am trying to add bullet drop to my game for a Bow and Arrow. I tried using forces such as velocity but detecting a hit at high speeds is unreliable in my opinion. I thought I should use ray cast but I do not know how to simulate bullet drop.

If you know any projectile trajectory formulas please post them.

Try FastCast. Making a combat game with ranged weapons? FastCast may be the module for you!
It’s an open source module, made for things like guns and bows, and it has things like bullet drop built into it.