Safe speed for projectile speed?

I completely understand why line traces are recommended, but if I intend to use a more complex “bullet”, I don’t know how to approach things with hit scans. For example how do I simulate gravity, and drag on a hit scan bullet? How do I make it curve? Maybe I want to attribute a certain dimension and weight to the bullet. I don’t want a huge artillery shell go through a crack in a ceiling because the line trace doesn’t detect collision…

Is there some sort of documentation about how different games approach projectiles?