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Winchester X4570H SuperX 45-70 Government 300 GR JHP 20 Rounds
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$61.99
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SKU: X4570H-020892201149
Overview
Built for 45-70 Government firearms, this SuperX load is aimed at hunters who want a jacketed hollow point option for larger game. The 300-grain bullet is listed with 2,355 ft-lbs of muzzle energy and 1,880 fps muzzle velocity, giving it a clear role in hunting applications where controlled expansion and penetration are desired. Brass casing adds a durable component to the load, and each box contains 20 rounds. It is a straightforward choice for hunters who want a purpose-driven cartridge without extra embellishment.
Why Hunters Choose the Winchester
45-70 Government
Caliber firearms
300-grain Jacketed
Hollow point bullet type
Listed Muzzle
Energy of 2355 ft lbs
Listed Muzzle
Velocity of 1880 fps
Brass Casing
Material for each round
Key Features
- Designed for 45-70 Government caliber firearms
- 300 grain jacketed hollow point bullet
- 20 rounds per box
- Brass casing material
- Listed muzzle velocity: 1880 fps
- Listed muzzle energy: 2355 ft lbs
Best Used For
- Hunters using 45-70 Government firearms for deer and similar larger game.
- Shooters wanting 300-grain JHP ammunition in a 20-round box.
- Owners of lever-action or other 45-70 Gov. rifles needing compatible factory loads.
- Hunters who prefer brass-cased ammunition for range sessions and field use.
- Seasoned or newer hunters looking for a straightforward SuperX hunting load.
Specifications
| Bullet Type | Jacketed Hollow Point (JHP) |
|---|---|
| Bullet Weight | 300 gr |
| Caliber | 45-70 Government |
| Casing Material | Brass |
| Muzzle Energy | 2355 ft lbs |
| Muzzle Velocity | 1880 fps |
| Rounds Per Box | 20 |
Pros
- Designed for 45-70 Government caliber firearms
- 300-grain jacketed hollow point bullet type
- Listed muzzle energy of 2355 ft lbs
- Listed muzzle velocity of 1880 fps
- Brass casing material for each round
- 20 rounds per box
Considerations & Trade-offs
- Designed specifically for 45-70 Government firearms, so it is not a general-purpose option across other calibers.
- The 300 gr JHP bullet is oriented toward hunting use, which may not suit shooters looking for a non-expanding or range-focused load.
- Each box contains 20 rounds, so larger-volume users may need to plan for multiple boxes.
- At this price point, it is a premium hunting load rather than a budget practice option.
Suggested Comparisons
- 45-70 Government hunting ammunition
- Jacketed hollow point rifle ammunition
- Big game ammunition
- Centerfire rifle cartridges
Suggested Accessories
- Ammunition storage box
- Hearing protection
- Cleaning kit
- Range bag
Frequently Asked Questions
What caliber firearms is this ammunition made for?
This SuperX load is designed for 45-70 Government caliber firearms.
What type of bullet does it use?
It uses a 300 grain jacketed hollow point (JHP) bullet.
How many rounds come in a box?
Each box contains 20 rounds.
What are the listed muzzle velocity and muzzle energy?
The listed muzzle velocity is 1880 fps and the muzzle energy is 2355 ft lbs.
What casing material is listed for this ammunition?
The casing material is listed as brass.