How does bullet construction impact terminal ballistics in .17 Remington?

Bullet Design and Material

The .17 Remington is often paired with hollow-point (HP) or soft-point (SP) bullets, which are designed to expand upon impact. These bullets typically feature a thin jacket and a soft core. For example, the 20-grain V-Max bullet from Hornady has a 0.015-inch thick jacket and a 0.050-inch thick soft core. This design allows for rapid expansion and a relatively small diameter, which is ideal for taking down small varmints at close to medium ranges.

Expansion and Penetration

The expansion rate of a bullet is critical in varmint hunting. A bullet that expands too quickly may lose too much weight and fail to penetrate deep enough to ensure a quick kill. Conversely, a bullet that does not expand enough may not transfer sufficient energy to the target. In the case of the .17 Remington, a 20-grain bullet with a 0.050-inch expansion ratio (e.g., from 0.020-inch to 0.070-inch) will provide a good balance between expansion and penetration. This expansion ratio allows the bullet to maintain its kinetic energy while expanding enough to create a significant wound channel.

Real-World Performance

In real-world scenarios, the performance of a .17 Remington cartridge can vary depending on the specific bullet design and the target’s size and weight. For example, a 20-grain V-Max bullet can achieve an expansion ratio of up to 0.080-inch when fired into a small rabbit, resulting in a diameter of approximately 0.060-inch. This expansion is sufficient to create a significant wound channel, ensuring a quick and humane kill.