Reach is the whole argument for Winchester Super-X 22 Magnum ammunition, and this 40 grain full metal jacket load makes that argument better than most. It leaves the muzzle at 1910 feet per second carrying 324 foot pounds of energy, which is a serious step up from anything a .22 Long Rifle can offer. Fifty rounds to the box, and every one of them built for precision.
What Winchester Super-X 22 Magnum Brings to the Field
The .22 Winchester Magnum Rimfire is a high velocity cartridge that offers a significant increase in power and range over the standard .22 Long Rifle. That extra speed flattens trajectory and extends the distance at which a rimfire remains genuinely effective on varmints and small game. For anyone who has watched a .22 LR run out of steam at 75 yards, the difference is obvious immediately.
This particular load pairs that velocity with a full metal jacket bullet, which is an unusual and deliberate choice in rimfire. Jacketed construction means minimal risk of lead exposure and clean penetration rather than rapid expansion. Winchester Super-X 22 Magnum in FMJ form is the answer for shooters who want reach without a fragmenting bullet.
Features Worth Noting
- 40 grain full metal jacket bullet known for exceptional accuracy and consistent performance.
- 1910 fps muzzle velocity and 324 ft/lbs of muzzle energy, well beyond .22 LR territory.
- Jacketed construction that reduces lead exposure at indoor and covered ranges.
- 50 rounds per box, the standard unit for a magnum rimfire.
- Part of the Super-X series from Winchester, tailored for varmint hunting and precision shooting.
Winchester Super-X 22 Magnum Specifications in Context
Caliber is .22 Winchester Magnum Rimfire, bullet weight is 40 grains, bullet type is full metal jacket, and the box contains 50 rounds. Muzzle velocity of 1910 fps and muzzle energy of 324 ft/lbs are the numbers that separate this cartridge from its smaller sibling. Those figures assume a rifle length barrel, and a magnum revolver will read considerably lower.
Remember that .22 WMR is a distinct cartridge and will not chamber safely in a .22 Long Rifle firearm. Check your barrel marking before ordering, and if you also need standard rimfire, our ammunition selection stocks the whole range. Rifles built for the magnum are typically heavier and better sighted, which makes the most of the extra performance.
Varmint Work, Target Shooting, and Storage
For varmint control, Winchester Super-X 22 Magnum delivers flat trajectory and enough energy to be decisive well past the range where a .22 LR becomes a guessing game. Zero at 100 yards and the holds inside that distance become simple. Pest shooters working across pasture and around outbuildings will appreciate that consistency.
Target shooters like the FMJ bullet for a different reason. It punches clean holes, fouls the bore less than plain lead, and leaves considerably less airborne lead at covered ranges. Shooting a box of Winchester Super-X 22 Magnum over sandbags is one of the more satisfying ways to spend an hour with a rimfire rifle.
The 50 round box size suits the way this cartridge actually gets used. Magnum rimfire is not a load you burn through by the hundred in an afternoon, it is a load you shoot deliberately at a specific target, so a box lasts longer than a bulk pack of .22 LR ever does.
Store the boxes cool, dry, and sealed. Magnum rimfire is more expensive than .22 LR and deserves better treatment than a rattling coat pocket, where rims can be damaged. A dedicated case with a desiccant pack keeps everything in shooting condition.
If your rifle is chambered for it, there is no reason to feed it anything less capable than Winchester Super-X 22 Magnum. This ammunition ships straight to your door wherever state and local law allows.
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