Killshot/Fallout 4

Killshot is a companion perk in Fallout 4.

Effects
Thanks to your relationship with MacCready, headshot accuracy in V.A.T.S. is increased by 20 percent.

Bugs

 * Due to a bug, the bonus was previously 2000%. As a result, head shots showed 95% accuracy consistently. As of patch 1.3, this has been fixed.