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Federal took their proven Fusion soft-point design and optimized it specifically for suppressed rifles. Loaded to 1,000 feet per second, these rounds sit just below the sound barrier, eliminating the harsh supersonic crack that suppressors simply can't quiet. You get whisper-quiet performance paired with the Fusion bullet's molecularly bonded jacket and pressure-formed core—no compromise.
Subsonic shooting requires a different mindset than standard velocity loads. The 300-grain bullet maintains momentum and energy through sheer mass rather than speed, making it capable at moderate distances while producing significantly less recoil. When paired with a suppressor, these rounds deliver a deep, quiet report that makes them ideal for hunting where noise matters. The low-velocity expansion is deliberate—Federal designed these bullets to open reliably even at subsonic velocities, something that standard hunting rounds struggle with.
The subsonic loading is the key difference here. Federal's engineers modified their established Fusion technology for velocities well below the 1,125 fps sound barrier. This keeps the performance silent through a suppressor while the 300-grain weight carries enough energy to the target. The bullet still features that molecularly fused copper jacket bonded to a pressure-formed lead core, ensuring the weight retention and controlled expansion you'd expect from Fusion ammunition.
If you're hunting with a suppressed rifle, subsonic ammunition changes the game entirely. There's no supersonic crack following the report—just a soft mechanical noise. This matters more than people often realize, especially for hog hunting or other situations where noise discipline matters. The 300-grain bullet trades some velocity for stealth, but in the .45-70, that mass still hits hard enough for effective terminal performance at typical hunting distances.
Each box contains 20 rounds of brass-cased ammunition, and like all Fusion loads, they're built on consistent Federal manufacturing standards. Whether you're setting up a new suppressed rifle or fine-tuning an existing setup, these loads give you a foundation that performs.
These rounds are loaded to 1,000 feet per second, which keeps them just below the speed of sound. This subsonic velocity eliminates the supersonic crack that suppressors can't quiet, while the 300-grain bullet still delivers reliable expansion and energy at typical hunting ranges.
Federal Fusion Subsonic rounds are specifically designed for suppressed rifles. At 1,000 fps with a suppressor, you get exceptional sound reduction. The ammunition's subsonic velocity is key—standard velocity .45-70 loads still produce a sharp supersonic crack even with a can attached.
Federal modified the Fusion design specifically for low-velocity performance. The molecularly bonded jacket and pressure-formed core expand reliably even at 1,000 fps, something standard hunting bullets struggle with. You get consistent terminal performance without the expansion delays typical of other subsonic loads.
Subsonic loads trade range for stealth and soft recoil. The 300-grain Fusion bullet is effective at close to moderate distances typical of suppressed hunting situations—generally inside 100 yards is where these rounds work best. Barrel length affects velocity, so longer barrels will squeeze slightly more performance from the load.
| UPC | 604544708523 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | F4570FS1SUB |
| Bullet Weight (Grains) | 300 |
| Caliber/Gauge | .45-70 Government |
| Grains | 300 gr |
| Model | |
| Product Type | Solid Base |
| Shipping Weight | 1.638 |
| Units per Box | 20 |
| Cost per Round | 2.40 |
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