17 winchester super magnum ammo

The .17 Winchester Super Magnum (WSM) is a rimfire rifle cartridge introduced in

2012 by the ammunition manufacturer Winchester. It was developed by necking

down a .27 caliber nail-gun blank cartridge to accept a .17 caliber (4.5mm)

bullet.

The initial loadings used a 20-grain (1.3 g) bullet, capable of achieving impressive

muzzle velocities of approximately 3,000 feet per second (910 m/s).

Development 17 winchester super magnum ammo

The .17 WSM was officially unveiled at the 2013 SHOT Show by Winchester and

Savage.

Compared to the .17 HMR, the .17 WSM features a brass case that’s about half

as thick, allowing for a higher maximum average internal pressure of 33,000 psi,

compared to 26,000 psi for the .17 HMR. Due to these differences, firearms

chambered for .17 HMR cannot safely use .17 WSM, and vice versa.

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