From Destiny 1 Wiki
|Task||Earn 5 Headshot Sprees while competing in the Iron Banner tournament.|
|Description||Practiced precision becomes a habit. That habit might just save your life.|
Exacting Measures is a Common Iron Banner Bounty. It requires the player to Earn 5 Headshot Sprees while competing in the Iron Banner tournament. A Headshot spree is killing 3 enemies with headshots without dying.