WINCHESTER - 17 WSM - 20 GR - PT - 50 RDS/BOX
Winchester Ammunition
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Winchester Ammunition
WINCHESTER - 17 WSM - 20 GR - PT - 50 RDS/BOX
The Winchester 17 WSM (Winchester Super Magnum) 20 Grain Polymer Tip is the world's fastest rimfire cartridge, delivering explosive varmint-stopping performance at an astonishing 3,000 feet per second right out of the box.
- Blazing 3,000 fps muzzle velocity — fastest rimfire cartridge available worldwide
- 20-grain polymer tip bullet engineered for rapid, reliable expansion on impact
- Superior ballistic coefficient delivers flatter trajectory than competing rimfire rounds
- Reduced wind drift for more accurate long-range varmint and small game shots
- More downrange energy than .17 HMR, .22 WMR, and other popular rimfire calibers
- Conveniently packaged in a 50-round box for range and field use
Who This Is For
The Winchester 17 WSM 20 gr Polymer Tip is built for serious varmint hunters and target shooters who demand maximum performance from a rimfire platform. If you're pursuing prairie dogs, ground squirrels, coyotes, or other small predators at extended ranges — or simply want the flattest-shooting, hardest-hitting rimfire round on the market — this ammunition delivers results that bridge the gap between rimfire convenience and centerfire capability. It pairs with rifles chambered specifically for 17 WSM, including offerings from Savage, Ruger, and Franklin Armory.
Specifications
| Brand | Winchester Ammunition |
|---|---|
| Caliber | 17 WSM (17 Winchester Super Magnum) |
| Bullet Weight | 20 Grain |
| Bullet Type | Polymer Tip (PT) |
| Muzzle Velocity | 3,000 fps |
| Muzzle Energy | ~400 ft-lbs |
| Rounds Per Box | 50 |
| Cartridge Type | Rimfire |
| Intended Use | Varmint Hunting, Target Shooting |
| Country of Origin | USA |
Frequently Asked Questions
What firearms are compatible with 17 WSM ammunition?
The 17 Winchester Super Magnum is a proprietary rimfire cartridge that requires a rifle specifically chambered for 17 WSM — it is not interchangeable with .17 HMR or any other rimfire caliber. Compatible rifles include models from Savage Arms (B.Mag series), Ruger (American Rimfire), and Franklin Armory. Always verify your firearm's chamber marking before purchasing ammunition.
How does 17 WSM compare to .17 HMR in terms of performance?
The 17 WSM significantly outperforms the .17 HMR in every measurable ballistic category. A 20-grain 17 WSM load exits the muzzle at 3,000 fps compared to the .17 HMR's approximately 2,550 fps with a 17-grain bullet. This translates to roughly 30% more muzzle energy, a flatter trajectory at distance, and noticeably less wind drift — making it the superior choice for varmint hunting beyond 150 yards.
Is this ammunition suitable for hunting varmints and small predators?
Absolutely. The 20-grain polymer tip design is purpose-built for varmint hunting, offering rapid, controlled expansion on thin-skinned targets like prairie dogs, ground squirrels, and foxes. The high velocity and flat trajectory make it exceptionally effective at ranges of 100–200 yards, where wind drift and drop can challenge lesser rimfire cartridges. It is not recommended for larger game due to the limited bullet weight and energy at extended range.
- Caliber:
- 17 WSM
- Bullet Weight:
- 20 GR
- Bullet Type:
- PT
- Purpose:
- Varmint
- Type:
- Rimfire Ammunition
- Box Quantity:
- 50
- Case Quantity:
- 500
- Lead Free:
- No
