Accuracy

Accuracy is a ranged weapon stat

Perks like Persistence, Eye of the Storm, and Hot Swap affect this.

1. Accuracy cone (error angle) - The physical size of the accuracy cone grows as you maintain fire, which we refer to as bloom, and this means shots have a higher error angle, and thus are less accurate.
2. Projectile accuracy - Likelihood of shot going dead center or receiving maximum aim assist deflection (I think). This one has been the hardest to test in game, but based on things Bungie has said in past updates we know it exists, and this is my hypothesis of what it does. I believe that weapons have a higher initial projectile accuracy and it decreases as you maintain fire or jump in the air, in conjunction with the accuracy cone (error angle) changes. So a weapon with high initial projectile accuracy and a wide initial accuracy cone (high error angle) like a hand cannon could have a fairly accurate first shot, but the likelihood of each following shot being accurate would decrease as both bloom increases, and projectile accuracy decreases. Alternatively, a weapon with a low projectile accuracy but relatively narrow accuracy cone (like auto rifles) tends to be be inaccurate on single shots, but the bloom is clamped, which keeps the bullets confined within a relatively tight diameter, perfect for close range battles where the opponent fills the diameter of the crosshairs.