Cannoneer (5e Feat)
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Prerequisites: Dexterity 13
You have become an expert in the use of artillery and heavy firearms. You gain the following benefits:
You have proficiency when operating siege equipment (siege weapons are detailed in the Dungeon Master's Guide p. 255.)
Whenever you make an attack roll with a two-handed firearm you can make a slight-of-hand (dexterity) check with DC 15. On a successful check add +2 to the attack roll and instantly reload the firearm without using a bonus action. On a failed check you attack as normal.