|Velocity in feet per second. Range in yards. All calculations done with Hornaday's Ballistic Calculator|
Initial velocities of 3000fps for the 5.56mm and 2800fps for the .243 Win.
|The .243 Win has as much energy at 800 yards as the 5.56mm has at 200 yards.|
|At 800 yards, a 13 yard miscalculation in range results in a 12" drop error for the 5.56mm. That is enough drop to take a bullet out of a 24" tall target zone. For the .243 Winchester, a 21 yard miscalculation in range will result in 12" of error.|
- Shorter barrel life.
- 35% less ammo per pound carried
- More recoil