If you wondered why aiming makes your bullets feel so much more responsive than hip-firing, this is the main reason why. This behavior carries over when you aim down a weapon's sights, although both the accuracy and aim assist cones seem to tighten and lengthen. This makes your weapon much less accurate as a gunfight continues, encouraging players to either pace their shots or fight at that weapon's intended range. This is known as 'bloom' by most of the community, referring to the 'blooming' of your weapon's accuracy cone as you fire. The growing symbol is your accuracy cone, and the shrinking symbol represents your aim assist cone. As you fire your weapon, you'll notice that one part of your crosshair will shrink while the other grows (shown in the image above).
