| The below information is mainly from press releases and general information on Winchester and Brownings web-sites. This should help a lot of folks to better understand the significance of the new Winchester Short Magnums and Winchester Super Short Magnums. At the bottom of this page is a chart of factory cartridge loadings for these new short magnum cartridges that will clearly point out a historical first in rifle and cartridge design.|
Winchester Centerfire Rifle Ammunition:
Browning Rifle and Gun Design:
From 1883, Browning worked in partnership with the Winchester Repeating Arms Company, and designed a series of rifles and shotguns, most notably the Winchester Model 1887 and Model 1897 shotguns and the lever-action Model 1886, Model 1892, Model 1894 and Model 1895 rifles, most of which are still in production today in some form.
21st Century Rifle Ammunition and Gun Design:
With that, why choose a rifle chambered for the WSM cartridges when the ballistics of the conventional, long-action cartridges are so similar? The answers are revealed in the rifles that fire these powerhouse cartridges themselves — the WSM rifles are short-action configurations.
WSM calibers have effectively re-written the rules that govern what a hard-hitting, high velocity rifle can be. Rifles chambered in WSM calibers, unlike their long action counterparts, are lighter, faster handling and more accurate thanks to the shorter, stiffer action. Perhaps the one thing that is hard to explain is this, these cartridges offer less recoil in similar weighted rifles of the longer cartridge designs, so, lighter weight rifles can be produced for these cartridges with no increases in felt recoil and offer the same down-range bullet performance values.
For 2001, Browning, in partnership with Winchester firearms and Winchester Ammunition is proud to announce two new WSM (Winchester Short Magnum) calibers to be added to its already popular 300 WSM A-Bolt line: the 270 WSM and 7mm WSM. This potent, high velocity, power-packing family promises to become more popular than the Hatfield’s and McCoy’s. With incredible ballistics, these new magnums, designed for short action rifles, bring new meaning to the term "Mountain Rifle". But make no mistake, these high performing fat guys are the perfect medicine for a 300-yard shot on corn fed, hog whitetails. All models have 23" barrels, weigh approximately 6 lbs. 9 oz. and have a three round magazine capacity.
For 2003, Browning, in partnership with Winchester firearms and Winchester ammunition, proudly announces two totally new calibers to its diverse A-Bolt line of centerfire rifles. The short fat cartridge family just got bigger! The Winchester Super Short Magnum (WSSM) in 223 and 243 caliber is about to add new dimension to the world of high-velocity, tack-driving systems. Not only are the calibers new, but the rifles themselves are of a totally new, shorter design — super short if you will.With a cartridge length of just 2.36", the new Super Short Magnum A-Bolt is 1/2" shorter than the current short action.
For 2004, we've kept our momentum with the new 25 WSSM. It utilizes the same diameter bullet (.257) and produces ballistics similar to the long action 25-06 Rem. and exceeds the performance of the whitetail hunters favorite, the 7mm-08 Rem. However, being chambered for the lightweight, fast-cycling A-Bolt super-short action, the 25 WSSM is significantly shorter than these popular cartridges, making the 25 WSSM possibly the ultimate cartridge for whitetail.
For 2005, Browning and Winchester® Ammunition have done it again with the introduction of the new 325 WSM caliber. With its short-action design and high-velocity, heavy hitting bullets, it just might be the ultimate North American big game hunting caliber. The 325 WSM bridges an important gap; featuring the high-speed and flat trajectory of the popular 300 WSM and the powerful knockdown punch of the long action 338 Win. Mag. — without the punishing recoil and additional rifle weight.
The above cartridges were designed for hunters, hunting the following game and non game animals (specifically).
The common factor of the 7 newly designed cartridges:
5. When you match 7 different rifle caliber trajectories to within 1 inch of each other at an exact distance, with exactly the same zero reference, using only factory ammunition, using 2 different length actions, it is not an accident, it is legendary design genius.