The HSM Magnuforce Subsonic .45-70 Government 550gr 20 Rounds HSM-45-70-16-N is an ultra-heavy, purpose-built subsonic ammunition designed for serious hunters and shooters who demand maximum terminal performance from their .45-70 Government firearms. Loaded with a massive 550-grain bullet, this Magnuforce load delivers exceptional penetration and energy transfer while remaining well below the speed of sound. It is one of the heaviest factory-loaded .45-70 subsonic options available, making it ideal for suppressed hunting and dangerous game defense.
Why Choose HSM Magnuforce Subsonic .45-70 Government 550gr?
The .45-70 Government is a legendary big-game cartridge, but most factory ammunition is supersonic and extremely loud. The HSM Magnuforce Subsonic 550gr load was developed specifically for hunters who use suppressors and need deep-penetrating performance on large and dangerous game. The 550-grain bullet is significantly heavier than standard .45-70 loads, providing outstanding momentum and penetration through thick hide, bone, and muscle. This makes it an excellent choice for hunting moose, brown bear, bison, and other large North American game. Because the load is subsonic, it pairs exceptionally well with quality suppressors, dramatically reducing muzzle blast and allowing hunters to maintain a low noise signature in the field. HSM’s Magnuforce line is known for pushing the limits of heavy-bullet performance, and this .45-70 load continues that tradition with premium components and consistent quality.
Key Features of HSM Magnuforce Subsonic .45-70 Government 550gr
- 550-Grain Heavy Bullet – One of the heaviest subsonic loads available in .45-70 Government
- True Subsonic Velocity – Designed to stay below the speed of sound for optimal suppressor performance
- Magnuforce Line – HSM’s premium series of high-performance, heavy-bullet ammunition
- 20-Round Box – Convenient quantity for hunting trips and load development
- Deep Penetration – Exceptional terminal performance on large and dangerous game
- Consistent Quality – Precision loaded with premium brass, primers, and powder
- Model HSM-45-70-16-N – Official HSM Magnuforce Subsonic .45-70 Government ammunition
Performance and Build Quality
The HSM Magnuforce Subsonic .45-70 Government 550gr is engineered for hunters who require maximum penetration and stopping power in a subsonic package. The 550-grain bullet offers tremendous sectional density and momentum, allowing it to drive deep into large game animals even at subsonic velocities. This load is particularly well-suited for suppressed lever-action rifles, where reduced noise is a major advantage during close-range hunting. HSM uses high-quality brass cases, reliable primers, and carefully selected powders to deliver consistent velocities and accuracy. Each round is crafted with attention to detail to ensure reliable feeding and ignition in both traditional and modern .45-70 firearms. Whether you’re hunting in thick timber or need a powerful suppressed option for dangerous game, the HSM Magnuforce Subsonic .45-70 delivers where it matters most — deep penetration and reliable performance.
Technical Specifications
| Product Name | HSM Magnuforce Subsonic .45-70 Government |
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| Model Number | HSM-45-70-16-N |
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| Caliber | .45-70 Government |
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| Bullet Weight | 550 Grains |
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| Bullet Type | Subsonic Heavy Bullet |
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| Velocity | Subsonic |
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| Quantity | 20 Rounds |
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| Product Type | Centerfire Rifle Ammunition |
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| Key Feature | 550gr Subsonic .45-70 for Suppressed Big Game Hunting |
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| Best For | Suppressed Hunting, Dangerous Game, Bear Defense |
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Maximum penetration in a quiet package.
HSM Magnuforce Subsonic .45-70 Government 550gr delivers extreme bullet weight and deep penetration with true subsonic velocities for suppressed hunting.
Important Notice: This product is ammunition and is subject to all applicable federal, state, and local laws regarding the purchase, possession, and use of ammunition. The buyer is solely responsible for ensuring compliance with all laws in their jurisdiction. Always follow proper firearm safety rules. Keep ammunition out of reach of children. This product is intended for lawful use only.
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