1.4 x 50 damage is 90, player health is around 100.
Also it isn't under the sniper rifle category. Even though it boasts the highest power of assault rifles in terms of damage per shot, it unfortunately doesn't have enough damage to kill with a single shot. It acts more like a battle rifle to be truthful. But it does have a higher capacity than all of the sniper rifles so you do have a better chance of making follow up shots.