.308 was a type of ammunition, commonly used in long-range sniper rifles such as the Springfield M1A.
President David Palmer's autopsy reported that the shooter had fired a single .308 caliber bullet into the President's neck from an rooftop adjacent to Wayne Palmer's apartment, killing him in seconds. ("Day 5: 7:00am-8:00am")
During Day 8, Pavel Tokarev used a Springfield M1A chambered for .308 rounds to assassinate Renee Walker after she saw him at the scene of Samir Mehran's murder. Jack later recovered the rifle and, upon examining it, realized that Tokarev was the one who had killed Renee. ("Day 8: 8:00am-9:00am", "12:00pm-1:00pm")
