Winchester Unleashes the .17WSM

When Winchester leaked that they were going to release the “Worlds Fastest Rimfire Cartridge” it didn’t take much imagination to guess that it would be a larger cased .17cal, but reaching 3,000 ft/sec is a is a bit of a shock at looking at the ballistics should be an extremely flat shooter.

If you are interested for the .17 the Ball Coef. = .125

EAST ALTON, Ill. (Jan. 3, 2013) – Coyotes, prairie dogs and other varmints, beware. In 2013, Winchester® Ammunition will arm small game hunters with the most revolutionary rimfire cartridge in the company’s almost 150-year history – the .17 Winchester Super Magnum.

17WSM2 The .17 Win Super Mag offers the downrange performance of a centerfire cartridge at only a fraction of the cost. For the first time in history, hunters can expect pinpoint accuracy and devastating performance from a rimfire cartridge at ranges well past 200 yards.

“Our engineers have been developing the top-secret .17 Win Super Mag caliber for more than three years and the rimfire revolution begins now,” said Brett Flaugher, Winchester Ammunition vice president of sales, marketing and strategy.  “At 3,000 feet per second it’s the fastest modern rimfire cartridge on the planet. The downrange energy deposited by the .17 Win Super Mag will be a game-changer for varmint and predator hunters everywhere.”

17WSMThe .17 Win Super Mag will initially be offered in three bullet types: a 20-grain plastic tip in the Varmint HV® (High Velocity) line, 25-grain plastic tip in the Varmint HE® (High Energy) line and a 20-grain jacketed hollow point in the legendary Super-X® line. Each .17 Win Super Mag bullet will far surpass the long-range wind drift and bullet-drop limitations of popular rimfire calibers like .22 Win Mag and .17 HMR, while depositing more than 150 percent more energy than both.
“Part of the appeal of rimfire ammunition to high-volume shooters is the relatively low cost,” added Flaugher. “With the launch of .17 Win Super Mag, now hunters will get the downrange performance of a centerfire cartridge at the more affordable price point of traditional rimfire ammunition. It’s the best of both worlds for our customers.”

.17 Win Super Mag specifications:

Symbol Sub Brand Bullet Weight/Type Muzzle Velocity
S17W20 Varmint HV 20-gr Plastic Tip 3,000 fps
S17W25 Varmint HE 25-gr Plastic Tip 2,600 fps
X17W20 Super-X 20-gr JHP 3,000 fps

Each of the brand-new .17 Win Super Mag symbols will be offered in a 50-round box and 1,000-round case. The ammunition will be available at Winchester dealers by April 2013. For more information on the .17 Win Super Mag, visit in January 2013.

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To me this is a varmint round and I would consider it within a reasonable range for a Coyote, but it should be LOUD and wouldn’t be my primary plinking choice (.22lr). Are you excited about this round?


  1. aczarnowski says

    Since I don’t get out hunting anymore a new rimfire doesn’t really interest me. Is cost per round really that important for predator hunters? Seems that would be a low consideration vs somebody, say, running 3-gun.

  2. Peter says

    Pros: The B.Mag is a light and slender rifle, it is relatively accurate, the ammo is fairly cheap and has great performance. Cons: The magazine doesn’t work and must be forced into position, the bolt handle raises too high causing my thumb to hit the scope with each chambering- despite installing high rings, the spring is too stiff so quick and smooth bolt throws are impossible, chambering is noisy and ammo is virtually impossible to find.

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