Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
The Winchester Super X 6.5x55mm Swedish Mauser ammo loads a 140 grain jacketed soft point bullet to 2550 feet per second muzzle velocity and 2022 foot-pounds of energy — engineered for controlled expansion and maximum impact on medium game at typical hunting ranges. The 6.5x55mm Swedish Mauser cartridge, introduced in 1894, remains a precision long-range hunting round favored for its mild recoil and flat trajectory. Winchester chambers this load with brass cases, boxer primers, and a non-corrosive powder charge, making it reloadable for shooters who process once-fired brass.
Load Profile
The 140 grain JSP bullet design features a soft lead core with a jacket that initiates expansion on impact while retaining enough mass for deep penetration through shoulder and rib structures on whitetail, mule deer, and similar-sized game. At 2550 fps from a 24-inch barrel, this load generates a supersonic signature out past 400 yards, maintaining energy retention for humane terminal performance inside 300 yards. Winchester uses a consistent powder charge across the Super X line to stabilize velocity shot-to-shot, with standard deviations typically under 25 fps in factory testing.
Specs at a Glance
| Spec | Value |
|---|---|
| Caliber | 6.5x55mm Swedish Mauser |
| Bullet weight | 140 grains |
| Bullet type | Jacketed Soft Point |
| Muzzle velocity | 2550 fps |
| Muzzle energy | 2022 ft-lbs |
| Rounds/box | 20 |
| Case | Brass |
| Primer | Boxer |
| Corrosive | No |
| Intended use | Hunting |
| Manufacturer | Winchester |
This load ships in 20-round boxes suitable for sighting-in rifles and field carry. For hunters running Swedish Mauser bolt-actions or other platforms chambered in 6.5x55mm, explore the full 6.5×55 ammo catalog to compare grain weights and bullet profiles.
Safe Handling & Compliance
Federal law requires purchasers to be at least 18 years old for rifle and shotgun ammunition, and at least 21 for handgun ammunition. Ammunition cannot be shipped to certain states, counties, and cities — review our ammunition shipping restrictions before ordering. Store ammunition in a cool, dry location away from heat sources and out of reach of unauthorized users.
- Follow the four rules of firearm safety at all times — treat every firearm as loaded, keep muzzle pointed in a safe direction, finger off trigger until ready to fire, and identify your target and what is beyond it.
- Verify that your firearm is chambered for 6.5x55mm Swedish Mauser before loading — chambering incorrect ammunition can result in catastrophic failure and serious injury.
- This ammunition contains lead, a substance known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands thoroughly after handling and avoid ingestion of residue.
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