Description
The Federal 45-70 Govt 300gr Subsonic SP load is built for shooters who want more from their .45-70 Government than typical factory ammunition delivers. Federal loads a 300 grain subsonic target soft point to a rated 1000 feet per second, producing about 666 foot-pounds of energy. Federal Subsonic loads keep velocity below the speed of sound, eliminating the supersonic crack for very quiet shooting with a suppressor.

Why Choose the Federal 45-70 Govt 300gr Subsonic SP
- 300 grain subsonic target soft point bullet
- Rated 1000 fps and 666 ft-lbs
- Brass cases with reliable primers
- Subsonic velocity for suppressed shooting
- 20 rounds per box, item 4570SUB1
Built for the Hunt
- Accurate, consistent hunting performance
- Reliable feeding in bolt-action and semi-automatic rifles
- Quality brass cases and reliable primers
- Suited to a wide range of game at typical distances
Buying ammunition by the box from the same production lot keeps velocity and point of impact consistent from one range trip to the next. Keep a record of the load you carry, check your ammunition for dents or loose bullets from time to time, and rotate your carry rounds so the ones in your firearm stay fresh. These simple habits help you get the full performance Federal builds into every cartridge.
Before you trust any new load, fire enough rounds through your firearm to confirm it feeds, fires and ejects reliably and that the point of impact matches your sights. Full-power loads produce more recoil and muzzle blast than typical range ammo, so practice with the Federal 45-70 Govt 300gr Subsonic SP until you are comfortable with it, and store the rest in a cool, dry place in the original box.
The .45-70 Government was adopted by the US Army in 1873 for the Springfield Trapdoor rifle and remains popular today in lever-action and single-shot rifles. Its large, heavy bullets have always been effective at modest velocity, which makes the cartridge a natural fit for subsonic loads that pair with a suppressor for quiet, hard-hitting performance.
Specifications
- Brand: Federal Premium
- Product Line: Federal Subsonic
- Caliber: .45-70 Government
- Bullet Weight: 300 grains
- Bullet Type: subsonic target soft point
- Muzzle Velocity: 1000 fps
- Muzzle Energy: 666 ft-lbs
- Case: Brass
- Quantity: 20 rounds
- Item Number: 4570SUB1
- UPC: 604544711240
Why Choose Federal 45-70 Govt Ammo
Hunters looking for 45-70 govt subsonic ammo want a load that shoots accurately and performs on game. This Federal Subsonic load from Federal pairs a proven bullet with consistent powder charges and quality brass for dependable results in the field.
The 45-70 govt 300 grain subsonic bullet leaves the muzzle at about 1000 fps with roughly 666 ft-lbs of energy. The heavy soft point expands reliably even at subsonic speed, making it useful for close-range hunting as well as quiet target work.
Federal Premium has made ammunition in Anoka, Minnesota since 1922 and is one of the largest ammunition makers in the country. Its Federal Subsonic line is built with the same quality controls as its premium hunting and law enforcement loads, and federal 45-70 govt ammo is trusted by shooters, hunters and agencies across the United States.
This ammunition is a good fit for owners of suppressed lever-action rifles such as the Marlin 1895, Henry All-Weather and Big Boy lever actions and single-shot rifles chambered in .45-70 Government. Always confirm your firearm is chambered for .45-70 Government, wear eye and ear protection, and follow all federal, state and local laws.
Browse more ammunition at Mag 5 Firearms, or visit Federal Premium for more about their full line of loads.








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