.25 Winchester Super Short Magnum cartridges will be available in 2004.

The evolution continues for the Winchester Super Short Magnum line. In 2004, the .25 WSSM will be the latest "short-fat" cartridge to roll off assembly lines and onto dealer's shelves.

According to Winchester Ammunition, the high efficiency of the "short-fat" design improves the interior ballistics of the cartridge. With more propellant surface area exposed to the primer, ignition is more consistent. In addition, the beltless shellcase allows headspacing off the shoulder to provide better centering of the bullet on the chamber. The new super-short action of the rifle also maximizes accuracy potential.

Winchester's .25 WSSM Model 70

Like its predecessors (.223 WSSM and .243 WSSM), the .25 WSSM is reported to have equal exterior ballistics of longer cartridges of the same caliber. Per Winchester Ammo, the ballistics of the .25 WSSM are equal to ballistics of the .25-'06 cartridges, with 14 percent less powder and less perceived recoil--all in a shorter action rifle (See full ballistics charts below).

The .25 WSSM is designed with varmints and medium sized, thin skin game in mind.

.25 WSSM Browning A-Bolt Hunter

Additionally, Both Winchester Rifles and Shotguns and Browning are adding the .25 WSSM caliber to the Model 70 and A-Bolt Families.

Because the overall cartridge length of the new .25 WSSM is only 2.36 inches, the short action system on both rifles are a full half-inch shorter than previous WSSM models. Winchester Rifles and Shotguns .25 WSSM Model 70 will be available in Super Shadow, Ultimate Shadow, Featherweight, Coyote and Stealth models. The Browning A-Bolt .25 WSSM will be available in Hunter, Classic Hunter, Stainless, Varmint, and Medallion models.

WINCHESTER SUPREME .25 WSSM CENTERFIRE RIFLE (85 gr.)
Cartridge			Symbol		Bullet Weight		Bullet Type		CXP Game #
25 WSSM			SBST25WSS		85 gr.		Ballistic Silver Tip		1
Velocity (fps)						Energy (ft.-lbs.)
Muzzle	100	200	300	400	500	Muzzle	100	200	300	400	500
3470	3156	2863	2589	2331	2088	2273	1880	1548	1266	1026	823
TRAJECTORY LONG RANGE YARDS
100		150		200		300		400		500
1.0		1.0		0		-5.2		-15.7		-32.5

WINCHESTER SUPREME .25 WSSM CENTERFIRE RIFLE (115 gr.)
Cartridge			Symbol		Bullet Weight		Bullet Type		CXP Game #
25 WSSM			SBST25WSSA		85 gr.		Ballistic Silver Tip		2
Velocity (fps)						Energy (ft.-lbs.)
Muzzle	100	200	300	400	500	Muzzle	100	200	300	400	500
3060	2844	2639	2442	2254	2074	2392	2066	1778	1523	1298	1099
TRAJECTORY LONG RANGE YARDS
100		150		200		300		400		500
1.4		1.3		0		-6.4		-18.6		-37.7

WINCHESTER SUPER-X .25 WSSM CENTERFIRE RIFLE (120 gr.)
Cartridge			Symbol		Bullet Weight		Bullet Type		CXP Game #
25 WSSM			X25WSS		120 gr.		Positive Expanding Point		2
Velocity (fps)						Energy (ft.-lbs.)
Muzzle	100	200	300	400	500	Muzzle	100	200	300	400	500
2990	2717	2459	2216	1987	1773	2383	1967	1612	1309	1053	838
TRAJECTORY LONG RANGE YARDS
100		150		200		300		400		500
1.6		1.5		0		-7.4		-21.8		-45.1