I understand that you don't really actively maintain this mod anymore, so it may take a while for you to reply, but I figure I should post this instead of message you in case some third party has the answer.

Anyways, looking at the code for your targeting interface that mysterious gunslinger can drop, it only affects the "ToHit" variable (don't think it matters whether ToHit or To-Hit). But unless I'm reading the online wiki wrong, the ToHit variable applies to melee combat, not ranged combat. To affect ranged combat, I think it needs to modify the AimVariance value negatively (since I guess the calculation makes a ranged weapon attack more accurate as it approaches zero). However, I dunno what specific code would change/fix this (although it might involve the CalculateBulletTrajectory method)

So if this is the case and I'm not totally wrong poking around in the code, this item only helps melee combat, doesn't affect ranged combat, disagrees with its description/intended function, and is sort of pointless for a mysterious gunslinger to drop since they are range heavy.

Please let me know whether I'm full of it or not. Thanks!