trying to calculate where to aim the cannon to hit a certain coordinate, very hard without knowing exact velocity calculations.

The propellant in the mod has a tooltip showing how much velocity it adds to the projectile.

Please note: this is a support board for bugs and enhancements related to the mod, not a help board for how to make things. If you woukd like to learn from community members more about the mod's content and what to do with it, I suggest you join the mod Discord, which can be found on the mod Github/CurseForge/Modrinth page.