[if Lan Wangji heard Dante's internal monologue, he'd applaud it -- the professional assumption that he knows his own limits well enough to judge is one he'd agree with, and he'd try to extend the same courtesy to others where it felt appropriate. without any prior knowledge that he and Dante work in different corners of the same demon-slaying industry, he himself recognizes that Dante's preoccupation and focus mark him as someone who's investigating from a place of expertise. his commentary only confirms the suspicion, since Lan Wangji doesn't have the first idea what a Luger or even a shell is. he'll assume it's a ranged weapon from context, and go from there.

it's obvious that shells were something that Dante expected to find, which means that it's probably worth sharing something that did remain on the scene. something that proves that the weapons weren't purely using spiritual energy, which would have been Lan Wangji's first guess.]

The bolts fired were physical. Marks left behind.