My $.02 why not make it the more you miss the greater chance of less dmg and the more you hit the greater the dmg. Eg. Gun does 10dmg but you miss 20 shots you have a 20% chance of it doing 9dmg on the flip side if you hit 20 in a row you have a 20% chance of it doing 10dmg. No clue what to do about shotguns. Kinda like your alignment of cop vs gangster.