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.17 Winchester Super Magnum

American rimfire rifle cartridge

Field	Value
name	17 Winchester Super Magnum
image	WSM + Hornets.jpg	image_size = 200px
caption	.17 WSM (left), with [.17 Hornet](17-hornet) (center) and [.22 Hornet](22-hornet) (right)
origin	United States
type	Rifle
designer	Winchester
design_date	2012
production_date	2013–present
parent	.27 caliber nail gun blank cartridge
case_type	Rimmed, bottleneck
bullet	.172
neck	.197
shoulder	.269
base	.269
rim_dia	.333
rim_thick	.066
case_length	1.200
length	1.440 in (36.58 mm) to 1.590 in (40.39 mm)
primer	Rimfire
max_pressure	33000
bw1	20 gr. (1.3 g)
vel1	3000
en1	400
bw2	25 gr. (1.6 g)
vel2	2600
en2	375
en3	.

.17 Winchester Super Magnum, commonly known as the .17 WSM, is a rimfire rifle cartridge developed by the ammunition company Winchester in 2012. It descended from a .27 caliber nail-gun blank cartridge by necking down the blank case to take a .17 caliber (4.5mm) bullet. Initial loadings were with a 20 gr bullet, delivering muzzle velocities around 3,000 ft/s.

Development

Winchester, in conjunction with Savage, introduced this cartridge at the 2013 SHOT Show.

The brass case for this round is roughly 50% thicker than the 17 HMR, and the max average internal pressure is 33,000 psi, compared to the 17 HMR's 26,000 psi.
The 17 WSM is not compatible with firearms chambered in 17 HMR and vice versa as the two cartridges have different dimensions.

Factory ammunition

Factory ammunition is available from Winchester, Federal, American Eagle. Federal Ammunition American Eagle 17 Win. Super Magnum cartridges are currently only available with 1.3 gram (20 grain) polymer-tipped projectiles rated at 914 m/s (3,000 fps) at the muzzle.

Several options from Winchester are available, including Varmint HV 17 Winchester Super Magnum with a 1.3 gram (20 grain) polymer-tipped projectile rated at 914 m/s (3,000 fps), Varmint HE 17 Winchester Super Magnum with a 1.6 gram (25 grain) polymer-tipped projectile rated at 793 m/s (2,600 fps), and Varmint-X 17 Winchester Super Magnum which is available with a lead-free 1 gram (15 grain) polymer tipped projectile, rated at 1,006 m/s (3,300 fps).

Firearms

Currently, rifles firing the 17 WSM are the Savage B-Mag bolt action, heavy barrel B-mag target edition. Ruger Model 77/17, Winchester 1885 Low Wall single shot, and the semi-automatic Franklin Armory F-17. The F-17 is the first gas-piston operated rimfire firearm designed to handle the higher pressures of this cartridge. Also recently Jard Inc. joined this list with their J71 17 WSM AR 15 rifle.

References

"http://17wsm.com/setting-the-record-straight-about-the-17wsm-with-a-faq/"

References

"American National Standard Voluntary Industry Performance Standards for Pressure and Velocity of Rimfire Sporting Ammunition for the Use of Commercial Manufacturers".
"The 17 Winchester Super Magnum".
(18 January 2013). "Savage .17 Winchester Super Magnum Rimfire Rifle – SHOT Show 2013".
(17 January 2013). "World's Fastest Rimfire Round: Winchester .17 Super Magnum".
"Franklin Armory".
(16 January 2014). "First Ever Functional Gas Operated Rimfire from Franklin Armory".

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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