Image unavailable
Winchester Ammo USA21 USA 21Sharp 37gr Full Metal Jacket 100 Per Box/20 Case
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$20.99
View on Fin Feather Fur Outfitters
You'll be taken to Fin Feather Fur Outfitters to complete your purchase.
Hunter's Outpost earns a commission from affiliate links at no extra cost to you.
SKU: USA21-020892105003
Overview
Built for shooters looking to step into the 21 Sharp rimfire platform, this Winchester load uses a 37-grain full metal jacket bullet and is offered in 100-round boxes. It is listed at 1,330 fps with 165 ft-lbs of muzzle energy, giving it a clear role as a high-velocity rimfire option for range use and other applications suited to this caliber. The FMJ bullet type may appeal to hunters and outdoor shooters who want a straightforward, consistent load in a modern rimfire format.
Why Hunters Choose the Winchester
21 Sharp
Bullet types not commonly found
Full Metal
Jacket bullet type is clearly
37-grain Bullet
Weight provides a defined factory
1330 Fps
Muzzle velocity is listed in
165 Ft-lbs
Muzzle energy is provided for
Key Features
- Winchester USA 21 Sharp ammunition in 21 Sharp caliber
- Full metal jacket bullet type
- 37 grain bullet weight
- Muzzle velocity listed at 1330 fps
- Muzzle energy listed at 165 ft-lbs
- 100 rounds per box; 20 boxes per case
Best Used For
- Hunters needing a 21 Sharp rimfire load for target practice and sight-in sessions
- Shooters wanting a full metal jacket option in a rimfire cartridge for range use
- Users stocking 100-round boxes for extended practice or high-volume shooting
- Hunters and outdoor enthusiasts looking for a 37-grain 21 Sharp ammunition option
Specifications
| Boxes Per Case | 20 |
|---|---|
| Bullet Type | Full Metal Jacket |
| Bullet Weight | 37 gr |
| Caliber | 21 Sharp |
| Muzzle Energy | 165 ft lbs |
| Muzzle Velocity | 1330 fps |
| Rounds Per Box | 100 |
Pros
- 21 Sharp caliber offers rimfire compatibility with bullet types not commonly found in .22 long rifle.
- Full metal jacket bullet type is clearly specified for straightforward load selection.
- 37-grain bullet weight provides a defined factory load profile.
- 1330 fps muzzle velocity is listed in the product specifications.
- 165 ft-lbs muzzle energy is provided for reference.
- 100 rounds per box offers practical quantity for range or field use.
Considerations & Trade-offs
- This is a 21 Sharp load, so it is not interchangeable with .22 Long Rifle firearms or ammunition.
- Full metal jacket construction may be less suited to applications where controlled expansion is the priority.
- At 37 grains and 1330 fps, performance is defined by this specific load rather than a broad-purpose rimfire profile.
- Packaged as 100 rounds per box, which may be more than needed for occasional use or limited testing.
Suggested Comparisons
- Rimfire ammunition
- Full metal jacket ammunition
- Small game hunting ammunition
- Target shooting ammunition
Suggested Accessories
- Ammunition storage box
- Hearing protection
- Cleaning kit
- Range bag
Frequently Asked Questions
What caliber is this Winchester USA21 load chambered in?
This ammunition is listed as 21 Sharp.
What type of bullet does this load use?
It is listed as a Full Metal Jacket bullet.
How many rounds come in a box?
Each box contains 100 rounds.
What are the listed velocity and energy figures?
The listed muzzle velocity is 1330 fps and muzzle energy is 165 ft lbs.
How many boxes are in a case?
The product listing states 20 boxes per case.