It has a rebated rim, bottleneck casing with a 1:9.5 twist on a large rifle magnum primer. vs. .300 Win. The Hornady Reloading Handbook lists loads up to 3000 fps with 140 grain bullets, and 2800 fps with their 160 grain bullet. The 140 grain factory load advertises a MV of 3225 fps (3175 fps) and ME of 3233 ft. lbs. Factory loaded ammunition for the 6.5 and .350 Magnums was (temporarily) discontinued during the 1990's. More important, the short magnum cartridges work through short rifle actions, which saves about 1/2 inch of bolt throw as well as overall rifle length, and a few ounces of weight. Mag. The theory is that this shorter but wider powder column is more quickly and evenly ignited by the explosion of the primer, yielding more consistent pressure and somewhat improved accuracy compared to a standard length cartridge of the same capacity. It is an excellent elk cartridge. 30-30 Win. Mag., forcing it into near-obscurity. Remington’s 7mm Mag. and superior to the .325 WSM. I have both 7mm Mag and 6.5PRC rifles. 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. The .300 WSM, .300 Rem. WSM and WSSM family of cartridges. 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 . As far as I can tell, all WSSM caliber rifles have been discontinued, although Winchester continues to offer the ammo. 308 Norma Mag. 7x57mm (7mm Mauser) Ammo. The main argument in favor of any of the short magnums is their alleged greater efficiency due to their shorter powder column. It actually has a .315" bore diameter and should have been named the .315 WSM. The other day my friend offered to let me shoot his Browning 7mm short mag. Any .300 Magnum is most appropriate when the emphasis in on hunting the larger species of big game. Those who are interested can read the individual articles about the various short magnums on the Rifle Cartridge Page. Mag. All of the WSM and SAUM cartridges use a .532-.534 inch rebated rim of standard (.375 H&H) Magnum diameter. They are too similar to each other and neither offers any ballistic advantage over the established and much more popular 7mm Remington Magnum. These figures are well beyond what the short action .358 Winchester can achieve. .270 versus 7mm Rem Mag. All of these are based on the WSM case shortened to a length of only 1.65" and a COL of 2.36". 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 7mm WSM and 7mm Remington Magnum are best suited for the exact same hunting situations. Re: 7mm mag vs 7mm wsm ?? The 7mm WSM and 7mm Rem. The chamberings of choice are the .284 Winchester, 7mm Winchester Short Magnum (7mm WSM), and 7mm Remington Short Action Ultra … SAUM, 7mm Rem. With any rebated rim case, the face of the bolt has less overlap with the rim of the case as it attempts to slide it forward and out of the magazine lips. These figures were taken in 24 inch test barrels and WSM hunting rifles generally fall about 100 fps short. The actual ballistics obtained with your firearm can vary considerably from the advertised ballistics. Overall cartridge length is 2.8 inches. [2], The 7mm WSM has failed to gain the same popularity as the other cartridges in the WSM family. (An unnecessary reduction in firepower is clearly undesirable when hunting dangerous game.) Joined: Jun 18, 2011 Messages: 37 Location: Connecticut. ... Ballistics. (3133 ft. October 28, 2013 Mag. Copyright 2002, 2017 by Chuck Hawks. I can see some appeal to the idea of a .250 Short Magnum based on the .300 RCM case. The .300 WSM has found a place in the market, while the .300 SAUM is already obsolescent. and 6.5mm Rem. Compare all 7mm Remington Magnum ammunition manufacturers on one easy to read chart. These should have been named WSSC (Winchester Super Short Cartridge), for the WSSM cartridges are not magnum cartridges in any sense of the word and thus do not really merit inclusion in this article. This gun in a short action with a 26″ barrel tips the scale at 6 lbs 3 ozs. Mag. This can lead to feeding failures and over-ride jams. The .350 Rem. SAUM). 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. lbs.). Think, pronghorn, mule, and fallow deer. Compare all .300 ammunition manufacturers on one easy to read chart. This means that they offer improved feeding reliability compared to the WSM and SAUM short magnums. If you want a flat shooting round for short hunting situations, both the 7mm RM and the .300 WM are going to get the job done. The 180 grain factory load claims a MV of 2970 fps and ME of 3526 ft. lbs. Paramount are the uniformity and concentricity of the bullet, the quality and precision of the rifle barrel, the care taken in bedding the barrel and inletting the stock, and the care with which the loads are assembled and matched to the rifle. As the 7mm Rem Mag is of smaller caliber than the 300 Win Mag, it is a very good choice for lighter, smaller animals. The differences between the 7mm Rem Magnum and the .300 Winchester Magnum rounds are shown in the table above. Mag., .270 WSM, .300 WSM, 7mm WSM, .300 Rem. It is a member of the Winchester Short Magnum family of cartridges. Bullet Style: Partition Use: Deer & Elk Sized Game. These are the most useful of the short magnum cartridges, although not the most popular. By David E. Petzal. The WSM magnum case has a 35-degree shoulder, a length of 2.1 inches, and a very short neck. As a cartridge for a "guide rifle" it is hard to beat. Newbie22 Member. lbs.). Firstly, both rounds are belted mags based on the .375 H&H Magnum cases.The primary function of a belted magnum was to provide accurate headspace control because the sloping shoulders, while reducing … Anyone shooting a .350 Magnum rifle today should be reloading. While you can read all over the internet published velocities of 3200 fps (130 grain ... click Goodbye 7mm Rem Mag, Hello 270 WSM Part II. in an 8.5 pound rifle, although this is actually moderate for a medium bore magnum. And, in spite of the myriad attempts to produce a 7mm Mag. The 150 grain factory load advertises a MV of 3200 fps (3110 fps) and a ME of 3410 ft. lbs. The 6.5mm Rem. The 7mm Winchester Short Magnum (also known as the 7mm WSM) is a centrefire cartridge developed in partnership with Browning Arms Company and Winchester ammunition, making its debut and introduced to the shooting public in 2001. limit the average shooter would do well to observe. In 2005 the .325 WSM came along. Foundry Outdoors carries the best selection of 7mm WSM Winchester Short Magnum ammo online. The following are Winchester .300 WSM figures. All velocities were measured in a 24 inch rifle barrel. The stats are generated using both a 7mm Remington Magnum, Winchester Ballistic Silvertip, 140g (ballistic coefficient 0.46) and a 7mm Remington Magnum, Winchester Ballistic Silvertip, 150gr (ballistic coefficient 0.493) being fired at a velocity of 3100fps from muzzle point blank, this also takes into account the standard 1.5" scope height, and a gun that has been sighted in at 100 yards. The 6.5mm Remington Magnum followed it the next year. Recoil is right up there, at about 25 ft. lbs. Uncategorized Ammo. Ballistics Calculator. Mag. With a 160 grain bullet the Winchester figures are 2990 ft/s and 3176 ft. lbs. The 7mm WSM cartridge achieves its useful purpose as an excellent cartridge for larger mule deer, sheep, black bear and elk. rifles. The .300 WSM seems to be the favorite among all of the short magnums. The first true commercial short magnum was the .350 Remington Magnum, introduced in 1965 by Remington. Complete 7mm Remington Magnum Winchester ammunition ballistics Chart. Following the initial success of the .300 WSM, the .270 WSM, 7mm WSM and 7mm SAUM were introduced. The true short magnum cartridges begin with the 6.5mm Rem. That's when Winchester kicked over the traces and brought out their .300 WSM cartridge, based on a new bottleneck case with a head diameter of .555 inch and no belt. SAUM boast similar ballistics, although neither has become popular. The .338 RCM is offered factory loaded with 200 and 225 grain bullets, which is fine as far as it goes. The .350 Rem. Mag. The 150 grain factory load has a claimed MV of 3300 fps and ME of 3628 ft. lbs. The 7mm Remington Magnum offers ballistics better than the .30-06 Springfield with all available bullet weights, one of the more popular loads being a 160 grain spitzer loaded to 3,000 ft/s (910 m/s). The overall cartridge length is 2.86 inches. In a hunting rifle, any advantage conferred by a shorter powder column is insignificant. and a 150 grain bullet at a MV of 3150 fps and ME of 3304 ft. lbs. Thread Status: Not open for further replies. 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. Remington introduced their .300 SAUM shortly after Winchester's .300 WSM hit the market. Mag. Magnum are unique cartridges and each offers something special to the shooter. 7mm Rem Mag vs 300 Win Mag – Comparing Cartridge Sizes. As such, they (along with the 6.5mm and .350 Rem. Magnum's reputation as a slayer of giant animals takes up too much powder space in the short RCM case to be practical. Hey everyone. Mule Deer Cartridge Showdown: .270 Win. IMR 4350 seems to be an efficient powder for this cartridge. The Remington Custom Shop also chambers rifles for the .350 Magnum, which seems to have caught its second wind in the 21st Century. Winchester claims a muzzle velocity (MV) of 3,225 ft/s with a 140 grain bullet for their 7mm WSM cartridge; the claimed muzzle energy (ME) is 3,233 ft. lbs. 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. 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. This length was chosen to allow it to work in the Model 7 short action rifle. The lighter, shorter 7mm bullets are preferred in these short case magnums. In fact, one of the justifications for the extremely sloping 8.5 degree shoulders of the original .375 and .300 H&H Magnum cartridges was feed reliability because of their anticipated use on dangerous game. vs. 7mm Rem. They are both belted magnums based on a blown out .375 H&H case with a 25-degree shoulder, reduced to a length of 2.17 inches. 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. Wsm has failed to gain the same popularity as the other of the.300 WSM were commercial successes, this. 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