Pretty sure this is the rub. CoC is not in any way a combat-oriented game and doesn't spend a lot of time in its rules doing lots of fancy things with combat. Just look at the amount of space spent on skills, lore, spells and ancient tomes and horrible beasties. Most investigators are scholarly types who don't spend a lot of time around guns unless it's occupation. Combat's almost a footnote, though it's covered enough to get the job done. Combat certainly happens, but it tends to be short. CoC is primarily aimed towards investigation, preserving sanity and AVOIDING combat so that investigators live long enough to prevent/delay horrible things from happening to our existence. If you're playing CoC primarily to do combat simulation, you're playing the wrong game.