Blue Gunpowder adds 10 damage on top of your damage output but doesn't increase firing speed. It is a strong alternative if the Demolisher is not affordable or does not work for your ship build. It is helpful for small ships and is an extra boost for large ships. Studies show that Blue Gunpowder can also be used with the Demolisher build to be really powerful.

Tools | Fishing RodSpyglass
Weapons | Cannon
Basic Upgrades | Distance UpgradeAttack Speed UpgradeDamage UpgradeShip Speed Upgrade
Ship Upgrades | Air PeglegNitro PegReinforced PlanksSteel Reinforced PlanksAdvanced Toolkit
Cannon Upgrades | Steel BarrelSinker's GlovesBlue GunpowderTitanium Barrel
Hybrid Upgrades | BruiserDrifterDemolisher
Other | Fountain of Youth