need help with the anniversary playlist

Hi all.I need some help relating to the pistol in anniversary playlist’s.I mostly play anniversary classic and anniversary free for all.I would like to know the amount of bloom in these playlist’s, is it 85% bloom?If wrong please correct me.I am having problems with timing my shots with the pistol in these playlist’s.As of now i am placing my shots to the head and not spamming the trigger.Is that the correct way or should i spam the trigger a bit?This is because i noticed that when i shoot at the head and bit to the right side i get a quicker kill but i tend to find this completely random.I am confused.Any help would be appreciated.