Troubleshooting: Why Didn’t My Bullet Expand Upon Impact?

Incorrect Bullet Selection

When selecting a controlled expansion bullet, it’s essential to consider the game you’re hunting and the bullet’s intended purpose. A bullet designed for medium-sized game may not be suitable for larger species. For example, bullets like the Barnes TSX or Hornady GMX are often used for elk or moose hunting due to their high weight retention and penetration capabilities. Conversely, a bullet designed for larger game may not perform well on smaller species. Always choose the right bullet for the job, and follow the manufacturer’s recommendations.

Inadequate Impact Velocity

Impact velocity is critical for controlled expansion, as it determines the bullet’s kinetic energy at the moment of impact. Most controlled expansion bullets are designed to expand at velocities between 1,500-2,000 ft/s. If the impact velocity is too low, the bullet may not expand as intended, resulting in poor penetration and weight retention. To achieve optimal expansion, use a rifle with sufficient muzzle energy and a bullet with a suitable ballistic coefficient.

Barrel and Alignment Issues

Barrel issues can also prevent controlled expansion. A barrel with excessive rifling or a throat diameter that’s too small can cause the bullet to expand too early or not at all. Similarly, improper bullet and barrel alignment can lead to uneven expansion or failure to expand altogether. To avoid these issues, ensure your barrel is properly maintained, and your bullets are seated correctly. If you’re experiencing consistent expansion failures, consider consulting a professional gunsmith or ballistician for guidance.