Winchester Super‑X .22 Winchester Magnum Rimfire ammunition delivers consistent, rimfire magnum performance for small-game hunting and target work. This load uses a 40‑grain full metal jacket bullet with factory-rated velocity and energy appropriate for magnum rimfire platforms. The product is offered in standard retail boxes and is available in case quantities for bulk purchasing.
Packaging
Box: Sold per box containing 50 rounds.
Case: Available by the case; each case contains 40 boxes (2,000 rounds total) and is achieved by ordering the required number of boxes.
Key Specifications
- The caliber is .22 Winchester Magnum (22 WMR).
- The bullet weight is 40 grains.
- The bullet type is a Full Metal Jacket (FMJ).
- The factory muzzle velocity is listed as 1910 fps.
- The factory muzzle energy is listed as 324 ft·lbs.
- The rounds per box are 50 rounds.
- The boxes per case are 40 boxes.
- The case material is specified as brass.
- The product series/line is Super‑X.
- The manufacturer is Winchester.
Reliable, factory‑loaded rimfire magnum ammo like this Super‑X offering provides consistent performance for shooters who need dependable feeding and predictable ballistics in .22 WMR platforms. Its 40‑grain FMJ configuration is suitable for high-volume practice and varmint or small-game uses where a full metal jacket is appropriate.
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.




