Smyth Busters: Does a Bullet Rise After Exiting the Barrel?

Published on September 29, 2020
Duration: 2:25

This video debunks the myth that a bullet rises after exiting the barrel. Experts Caleb and Steve from Brownells explain that while the bullet's trajectory may rise above the line of sight, the bullet itself travels in a straight line relative to the bore immediately after leaving the muzzle. The perceived rise is due to the barrel being angled upwards to compensate for gravity's effect on the bullet's path.

Quick Summary

A bullet does not rise after exiting the barrel; it travels in a straight line relative to the bore. The perceived upward motion is due to the barrel being canted upwards to compensate for gravity's immediate effect, causing the bullet's trajectory to rise above the line of sight before dropping.

Chapters

  1. 00:05Introduction: The Bullet Rise Myth
  2. 00:15Common Belief: Bullet Starts Rising
  3. 00:30Trajectory vs. Muzzle Rise Explained
  4. 00:46Barrel Angle and Bullet Drop
  5. 00:52Bullet Path vs. Sight Picture
  6. 01:14Clarifying the Bullet's True Path
  7. 01:25Understanding Trajectory Over Sight Line
  8. 01:30M4 Battle Sight Example
  9. 01:54Military Training History
  10. 02:02Viewer Engagement & Next Myths

Frequently Asked Questions

Does a bullet actually rise after leaving the barrel?

No, a bullet does not physically rise after exiting the barrel. It travels in a straight line relative to the bore. The perceived rise is due to the barrel being angled upwards to compensate for gravity, which immediately begins to pull the bullet down.

Why does it seem like a bullet rises?

The apparent rise is an optical illusion caused by the firearm's sights being aligned higher than the barrel. As the bullet travels straight from the muzzle, its trajectory will eventually rise above the line of sight and then fall due to gravity.

What is the role of gravity in bullet trajectory?

Gravity is the primary force that causes a bullet to drop from the moment it leaves the barrel. Firearm design and aiming techniques, like the battle sight zero, are developed to account for this constant downward pull.

What is a battle sight zero?

A battle sight zero, like the 300-meter zero on an M4, is a sight setting that allows for reliable hits on targets within a certain range without needing to adjust the sights. It's achieved by aligning the sights so the bullet's trajectory intersects the line of sight at that specific distance.

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