Last reviewed: 2026-04-17 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
The 5.7x28mm combo pack from Fiocchi pairs range volume with defensive capability—300 rounds of Range Dynamics 40-grain full metal jacket for high-rep drills, plus 100 rounds of Hyperformance 40-grain hollow point for carry rotation and barrier testing. Both loads push velocities above 1,700 fps from a pistol-length barrel, delivering the flat trajectory and penetration the 5.7x28mm cartridge was engineered to provide. For shooters running FN Five-seveN pistols, Ruger-5.7 handguns, or CMMG AR-57 uppers, this 400-round package covers training and real-world carry with one SKU.
Ballistic Snapshot
The Range Dynamics load runs a 40-grain FMJ at 1,700 fps—enough velocity to achieve consistent expansion in gelatin when paired with barrier media, though this load prioritizes volume and cost-per-round for extended range sessions. The Hyperformance hollow point steps up to 1,750 fps with the same 40-grain projectile, engineered for controlled expansion in soft tissue while maintaining the sectional density to defeat intermediate barriers like heavy clothing and drywall. Both loads chamber in SAAMI-spec 5.7x28mm firearms; headstamp and primer pockets are Boxer-primed with reloadable brass cases, though most shooters treat this as factory-fresh training stock rather than brass to reclaim.
The Numbers
| Spec | Value |
|---|---|
| Caliber | 5.7x28mm |
| Bullet weight (Range Dynamics) | 40 grains |
| Bullet type (Range Dynamics) | Full Metal Jacket |
| Muzzle velocity (Range Dynamics) | 1,700 fps |
| Bullet weight (Hyperformance) | 40 grains |
| Bullet type (Hyperformance) | Hollow Point |
| Muzzle velocity (Hyperformance) | 1,750 fps |
| Rounds/box | 400 (300 FMJ + 100 HP) |
| Case | Brass |
| Primer | Boxer |
| Intended use | Training / Self-defense |
| Manufacturer | Fiocchi |
Both loads feed reliably in factory 5.7x28mm magazines with consistent ignition across temperature ranges—shooters report clean ejection and minimal fouling across extended strings. Browse the full 5.7×28 ammo inventory for additional grain weights and barrier-blind projectiles.
Safe Handling & Compliance
Federal law requires purchasers to be at least 18 years old for rifle and shotgun ammunition, and at least 21 for handgun ammunition. Ammunition cannot be shipped to certain states, counties, and cities—review our ammunition shipping restrictions before ordering. Store ammunition in a cool, dry location away from heat sources and out of reach of unauthorized users.
- Observe the four universal rules of firearms safety at all times—treat every firearm as loaded, finger off trigger until sights are on target, positive identification of target and backstop, muzzle in a safe direction.
- Verify current federal, state, and local laws governing ammunition purchase and possession in your jurisdiction before ordering—some states restrict handgun ammunition sales to residents 21 and older, and shipping restrictions apply in certain municipalities.
- Store ammunition separate from firearms in a locking container; high-velocity loads like 5.7x28mm generate chamber pressures exceeding 50,000 psi—never load corroded, damaged, or remanufactured cartridges in factory firearms.
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