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| .25 WSSM | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Type | Rifle | |||||||||||||||||||||||
| Place of origin | USA | |||||||||||||||||||||||
| Production history | ||||||||||||||||||||||||
| Designer | Browning / Winchester | |||||||||||||||||||||||
| Manufacturer | Winchester | |||||||||||||||||||||||
| Produced | 2004 | |||||||||||||||||||||||
| Specifications | ||||||||||||||||||||||||
| Parent case | .300 WSM | |||||||||||||||||||||||
| Bullet diameter | .257 in (6.5 mm) | |||||||||||||||||||||||
| Neck diameter | .305 in (7.7 mm) | |||||||||||||||||||||||
| Shoulder diameter | .544 in (13.8 mm) | |||||||||||||||||||||||
| Base diameter | .555 in (14.1 mm) | |||||||||||||||||||||||
| Rim diameter | .535 in (13.6 mm) | |||||||||||||||||||||||
| Rim thickness | .054 in (1.4 mm) | |||||||||||||||||||||||
| Case length | 1.670 in (42.4 mm) | |||||||||||||||||||||||
| Primer type | large rifle | |||||||||||||||||||||||
| Ballistic performance | ||||||||||||||||||||||||
| ||||||||||||||||||||||||
| Source(s): Hodgdon Online Reload Data | ||||||||||||||||||||||||
The .25 Winchester Super Short Magnum is a third member of the Winchester Super Short Magnum (WSSM) cartridge family created by Winchester and Browning. It is the largest caliber of the WSSM's and is the most capable of handling large game such as deer and wild boar.
It is a necked-up version of the .243 WSSM, which is in turn a shortened .300 WSM (Winchester Short Magnum). The WSSM cartridges are based on ballistics design philosophies that are intended to produce a high level of efficiency.
Like other WSSM cases, the .25 is short and fat, which is designed to be more efficient. However, short fat cases with an abruptly angled shoulder and have been criticized by some as being difficult to feed properly in some rifles.
Unlike the other WSSM rounds, the .25 is a magnum in name only, based on the case it uses. Performance wise it is almost exactly between the .257 Roberts and the .25-06 Remington, making it well suited for medium to large game. Performance is far less than other .25 caliber magnum rounds as as the .257 Weatherby Magnum. In fact, ballistically it's almost identical to the improved version of the .257 Roberts, which P.O. Ackley said was his favorite choice for an all-around cartridge.
See also
References
- * The .25 WSSM by Chuck Hawks
- Browning WSSM info
- Benchrest.com Forums
- The Overlooked .25 Caliber Cartridges by Chuck Hawks
- Handbook for Shooters & Reloaders vol I, Book by P.O. Ackley; Plaza Publishing, 1962, ISBN 978-9992948811
External links
- The Experts Agree - The WSSMs are Winners! - Browning
- WSSM Zone loading data
- The Overlooked .25 Caliber Cartridges by Chuck Hawks