I can notice a huge difference when I use rangefinder or not, it adds to accuracy as well, and it seems to 'snap' to peoples heads better than before (even with the sight that has enhanced target acquisition), when I don't use it I can aim at an enemies head from not even that far away and have it not count as a headshot, with it on it never seems to fail. I also am constantly moving my reticule, so the tiny amount it is offset when you fire a second time has already been accounted for by me aiming at their head again, to me extra stability would just be a waste at that point if I can otherwise counter one of the most major drawbacks of hand cannons, the reload time. I do get what you are saying though.