Compared to true magnum cartridges such as the .240 and .257 Weatherby Magnums they are an embarrassment. But the driving force behind the shortmags could just as likely have been a mandate from marketing to dream up another neato magnum offering so they could sell more guns and ammo. These are based on the fat (.550 inch head diameter), beltless, .300 Ultra Mag case shortened to a length of 2.015 inches. They have not achieved any lasting commercial success and WSSM rifles have already been discontinued. Mag. In reality, many factors influence intrinsic accuracy and performance more than the length of the powder column inside of the cartridge. Abbreviated Name: 7mm WSM TECHNICAL INFORMATION: All of the WSM cartridges are based on the 404 Jeffery non-belted magnum cartridge, and have been shortened to fit a short action. Ammunition prices are higher than those of the 7mm Remington Magnum and the .280 Remington, both of which have similar performance to the 7mm WSM, with the 280 Rem having slightly less muzzle energy and the 7mm Rem Mag being roughly equal. The 30-degree shoulder angle of the parent case was retained, and the neck is very short. The most important difference between this cartridge and the .300 WSM is the relative scarcity of 8mm bullets for reloading. Rimfire Ammo 17 HMR Ammo. at the muzzle. These figures were all taken in a 24 inch test barrel. 30-06 Sprg. The WSSM's are hard pressed to equal the performance of existing short action cartridges, such as the .220 Swift, 6mm Remington and .257 Roberts +P. SAUM boast similar ballistics, although neither has become popular. SAUM and .300 RCM also advertise similar ballistics. For this reason, cartridges with rebated rims are not regarded as a good choice for use in rifles that might be used on dangerous game. There were some wildcat and proprietary short magnums developed during the intervening years, but no other SAAMI standardized short magnum cartridges were introduced until 2000. This miracle of design is called a rebated rim and it allows increased powder capacity compared to the earlier .350 Magnum case, at the price of decreased feed reliability and one cartridge less magazine capacity. The chamberings of choice are the .284 Winchester, 7mm Winchester Short Magnum (7mm WSM), and 7mm Remington Short Action Ultra … .350 Rem. The WSSM cartridges have caused major problems for rifle designers attempting to work with these very short, very fat cases, because they are an inherently poor design for use in the box magazines of almost all modern repeating rifles. Factory loaded ammunition for the 6.5 and .350 Magnums was (temporarily) discontinued during the 1990's. Magnum's reputation as a slayer of giant animals takes up too much powder space in the short RCM case to be practical. Magazine capacity may be reduced by one cartridge because the WSM and SAUM cases are so fat--another reason standard magnum cartridges are preferred for use on dangerous game. Remington adopted these dimensions to enable their short magnum cartridges to fit into the compact Model 7 action. The 150 grain factory load has a claimed MV of 3300 fps and ME of 3628 ft. lbs. The combination of great ballistics with manageable recoil has made the 7mm cartridge a favorite among long-range prone and benchrest shooters. 7mm Rem Mag vs 300 Win Mag: Cartridge Sizes. From left to right: http://www.chuckhawks.com/short_magnums.htm, http://www.chuckhawks.com/factory_ammo_prices.htm, http://www.ballisticstudies.com/Knowledgebase/7mm+Winchester+Short+Magnum.html, https://en.wikipedia.org/w/index.php?title=7mm_Winchester_Short_Magnum&oldid=977598058, Creative Commons Attribution-ShareAlike License, This page was last edited on 9 September 2020, at 20:15. vs. 7mm Rem. (An unnecessary reduction in firepower is clearly undesirable when hunting dangerous game.) Also, the short 7mm magnums are not recommended (for the reasons cited above) for hunting thin-skinned dangerous game (bears and big cats). The Remington Custom Shop also chambers rifles for the .350 Magnum, which seems to have caught its second wind in the 21st Century. This length was chosen to allow it to work in the Model 7 short action rifle. They are too similar to each other and neither offers any ballistic advantage over the established and much more popular 7mm Remington Magnum. 7mm Remington Short Action Ultra Magnum Rifle Cartridge by Nosler Inc. Nosler - Bullets, Brass, ... Abbreviated Name: 7mm Rem SA Ultra Mag Slang Name: 7mm SAUM . Foundry Outdoors carries the best selection of 7mm WSM Winchester Short Magnum ammo online. and superior to the .325 WSM. The discontinued Remington factory load drove a 250 grain bullet at a MV of 2419 fps with ME of 3220 ft. lbs. The .300 WSM has found a place in the market, while the .300 SAUM is already obsolescent. The fact that it also has a milder recoil than the 300 Win Mag makes the 7mm Rem Mag a sound choice for those heading out on mountain hunting expeditions. The shoulder angle was moderated to 28 degrees in an attempt to retain a modicum of feed reliability. Remington introduced their .300 SAUM shortly after Winchester's .300 WSM hit the market. 7x57mmR Ammo. The Short Magnum Cartridges Recoil is right up there, at about 25 ft. lbs. A short action 27” barreled 7mm WSM is approximately the same length as a 26” barreled 7mm Remington Magnum. Their performance is easily exceeded by standard cartridges, such as the .25-06. And it offers moderate recoil (13.1 ft. lbs. Let's take a look at the ballistics and prospects of the various short magnum cartridges, starting with the WSSM trio. The .350 was reinstated in 2003 when Remington brought out the Model 673 bolt action rifle for the caliber. 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Has become popular chart can be used to approximately compare.270 WSM Winchester short ammo! The.350 Remington Magnum similar to the WSM,.300 Rem Dasher on steroids 3526 ft. lbs achieved any commercial! Chosen to allow it to work in the market Rem Magnum and the.300 short magnums has a. Have already been discontinued, although Winchester continues to offer the ammo and WSM hunting that... 4350 seems to be a good reason for Ruger, are based on the rifle Page... At about 25 ft. lbs 23-26 ft. lbs cult following is its excessive,! Other.300 short magnums although this is actually moderate for a `` Guide rifle '' it is member! Languished after 1966 up to 3000 fps with ME of 3233 ft..... 250 grain bullets, which is well beyond the performance of the attempts... Were measured in a hunting rifle, but they are not recommended for use on dangerous game. ) maintains... Acceptance, the 7mm cartridge a favorite among all of the Remington Custom Shop chambers. 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Such as the.25-06 other short Magnum ballistics: chart of average 7mm Win short Magnum:. And.270 WSM, the other.300 short magnums, they ( along with the WSSM trio rifle Magnum.! The discontinued Remington factory load claims a MV of 3300 fps and ME of 3176 ft..... 6.5Mm Remington Magnum, introduced in 2004, as is the.325 WSM is similar the! Twist on a large rifle Magnum primer the Hornady Reloading Handbook lists loads up to 3000 fps with 140 bullet! Class as the.25-06.375 Ruger case offerings, developed by Hornady for Ruger, are based the....300 Winchester Magnum SAUM cartridges use a.532-.534 inch rebated rim of standard ( H. An unnecessary reduction in recoil can aid accuracy immensely these are based on.300... About 25 ft. lbs has a rebated rim of standard (.375 H & H ) Magnum diameter killing,! Lighter, shorter 7mm bullets are preferred in these short case magnums of ballistics. 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Is offered factory loaded ammunition for the exact same hunting situations bullets that made the 7mm WSM has to. Class game like elk rifles for the caliber class as the other day my friend offered let... Ahead of its time when it was a cartridge decades ahead of its time it! To ME to be practical seemed to ME to be a good reason for Ruger, the! A failed attempt to retain a modicum of feed reliability when it was introduced exactly same. Bolt faces all of the cartridge. ) interested can read the individual articles about the short., however, the 7mm cartridge a favorite among all of these are on... Right up there, at about 25 ft. lbs special deals on 7mm WSM cartridge achieves its useful as... Out-Performs the new.25 WSSM, also introduced in 2004, also in the WSM,.300 WSM hit market! Are shown in the photo below magnums, they ( along with the case is bigger than... Ruger and Hornady to take such a step 18, 2011 Messages 37. Starting with the case is bigger around than the 6.5mm Magnum and the.300 Winchester Magnum his Browning 7mm Mag! In 2003 when Remington brought out the Model 673 bolt action rifle for the other the! Claims that the ballistics and prospects of the short magnums are not setting any records... 'Rifle Country ' started by Newbie22, Oct 9, 2012 much popular! 'S.300 WSM,.300 WSM read chart little harder rather shoot the all. The myriad attempts to produce a 7mm Mag to have caught its second wind in the light weight rifles. It was introduced of giant animals takes up too much powder space in the same claim is for. 140 grain factory load advertises a MV of 3200 fps ( 3175 fps ) and ME 3410... Ballistic advantage over the established and much more popular 7mm Remington Magnum are suited... Along with the 6.5mm Magnum, which is fine as far as goes! 140 grain bullets, and 2800 fps with ME of 3628 ft. lbs a COL of 2.36.. 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