The Evolution Of The Rifle

Since then a British Army sniper beat the Canadian's record by 150 ft (46 m), by killing two Taliban insurgents at a range of 8,120 ft (2,470 m). He was using a standard issue British Army sniper rifle, the L115A3.
• Bullet Rotational Speed (RPM)
Bullets leaving a rifled barrel can spin at over 100,000 revolutions per minute (rpm) depending on the muzzle velocity of the bullet and the pitch of the rifling. The rotational speed of the bullet can be calculated by using the formula. The formula divides the number of inches in a foot (12) by the rate of twist that the barrel has. This number is multiplied by the muzzle velocity (MV) and the number of seconds in a minute (60). For example, a bullet with a muzzle velocity of 3,000 feet per second (910 m/s) leaving a barrel that twists once per foot (1/12") would rotate at 180,000rpm.