HSM Subsonic .45-70 Government ammunition is a heavy-for-caliber load intended for controlled subsonic performance in modern lever-action, bolt-action, and single-shot rifles. The cartridges use 550-grain flat-nose projectiles with a Hi-Tek Supercoat and hard-cast construction suitable for reloaders. From an 18″ barrel this load is listed at approximately 1,000 feet per second and about 1,230 foot-pounds of energy.
Packaging
Box: Sold per box; each box contains 20 cartridges and is the standard retail unit for this listing.
Case: A case is fulfilled as 25 boxes. A case quantity is achieved by ordering the required number of boxes (25 boxes × 20 cartridges = 500 cartridges).
Key Specifications
- Caliber: .45-70 Government.
- Bullet weight: 550 grains.
- Bullet type: Flat Nose.
- Bullet construction/finish: Hard cast lead with Hi-Tek Supercoat.
- Velocity: Approximately 1,000 ft/s from an 18″ barrel.
- Energy: About 1,230 foot-pounds.
- Cartridge overall length: 2.530 inches.
- Recommended rifling twist: 1:20 or faster.
- Cartridges per box: 20.
- Boxes per case: 25.
This load provides a heavy, subsonic projectile option with a durable hard-cast construction and a Hi-Tek coating for reduced fouling and improved handling during loading. It is suitable for shooters who require consistent, low-velocity performance in .45-70 platforms and value reloadable components and a robust flat-nose profile.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.
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