[He starts at the sudden voice, turning around with a tense expression. It takes him a moment to parse exactly what was being said, and then he lets out a nervous breath.]

Not with orichalcum ammunition. It would damage the gun, and the bullets would most likely pass entirely through the target. These arrows negate the magic of anything the arrowhead touches, so they're useful for magic using enemies that can't be defeated by a simple well-aimed bullet.