Choosing the right cartridge for your firearm depends heavily on intended use. The .17 HMR and 5.7x28mm are both popular choices, but cater to vastly different needs. This in-depth comparison will explore their key differences, helping you determine which caliber best suits your requirements.
Ballistics and Performance: A Head-to-Head
The .17 HMR (.17 Hornet Magnum) and the 5.7x28mm are distinct calibers with contrasting performance characteristics. Let's dive into the specifics:
.17 HMR:
- Caliber: .17 (4.5mm)
- Cartridge Type: Rimfire
- Velocity: Typically around 2550 fps (feet per second)
- Energy: Relatively low compared to the 5.7x28mm
- Applications: Small game hunting (squirrels, rabbits), pest control, target shooting. Excellent for plinking due to its relatively low recoil and affordability.
5.7x28mm:
- Caliber: 5.7mm
- Cartridge Type: Centerfire
- Velocity: Generally around 2300-2800 fps depending on the load.
- Energy: Significantly higher than the .17 HMR.
- Applications: Personal defense (particularly against threats wearing body armor), law enforcement, and specialized military applications.
Key Ballistic Differences: The 5.7x28mm boasts superior penetration and stopping power thanks to its higher velocity and energy. The .17 HMR excels in accuracy at longer ranges, but its lower energy limits its effectiveness on larger game and as a self-defense round.
Weaponry and Availability: Finding the Right Firearm
Both calibers are available in various firearms, but their applications influence the weapon designs:
.17 HMR Firearms:
- Typically found in: Bolt-action rifles, semi-automatic rifles, and occasionally handguns.
- Availability: Widely available and relatively inexpensive.
5.7x28mm Firearms:
- Typically found in: Pistols (FN Five-seveN is a prime example) and select carbines (like the FN P90).
- Availability: Less widely available than .17 HMR firearms; often more expensive.
Cost and Ammunition: Budget Considerations
The cost of ammunition is a crucial factor for many shooters:
.17 HMR Ammunition:
- Cost: Generally less expensive than 5.7x28mm ammunition.
- Availability: Readily available at most sporting goods stores.
5.7x28mm Ammunition:
- Cost: Significantly more expensive than .17 HMR ammunition.
- Availability: May require specialized retailers or online purchases.
Summary Table: A Quick Comparison
| Feature | .17 HMR | 5.7x28mm |
|---|---|---|
| Caliber | .17 (4.5mm) | 5.7mm |
| Cartridge Type | Rimfire | Centerfire |
| Velocity | ~2550 fps | ~2300-2800 fps |
| Energy | Low | High |
| Penetration | Low | High |
| Applications | Small game, pest control | Self-defense, law enforcement |
| Cost | Low | High |
| Weapon Availability | Wide | Limited |
Conclusion: Selecting the Right Caliber
The choice between the .17 HMR and the 5.7x28mm hinges entirely on your intended use. The .17 HMR is a superb choice for small game hunting, plinking, and target shooting, offering affordability and accuracy. Conversely, the 5.7x28mm is a powerful, high-velocity round ideal for personal defense and specialized applications where superior penetration and stopping power are paramount. Carefully consider your needs before making a decision.
