So i figured out how to make a Beggar's shotgun
Loads 6 shotgun shells in and spews them all out at once
needs less accuracy -2 clip size and less damage and bam
new wepon
Because right now the only thing it can't 1-hit is anything that is ubercharged
This gave me an idea of another interesting weapon. Imagine what you said except it's a musket and you're pouring in gunpowder, instead of shooting repeatedly it's one powerful shot who's power is determined by how much 'ammo' you pour in (also a fast moving projectile like the arrow but smaller rather than hitscan.)
It'd do 40 damage per ammo loaded (up to 4) and if you hold it charged for too long it explodes (it's not immediate like the bazooka) and damages you for maybe 30ish damage and sets you on fire.