However, while that may well contribute somewhat to improved accuracy, there are many other factors that influence accuracy to a much larger degree. Is it significantly more accurate than the 7mm Remington Magnum? For those reasons, the .300 Win Mag actually has significantly more case capacity (around 10-15% more, depending on the manufacturer) than the 300 WSM. However, the Winchester Short Magnum cartridges all use a much fatter case without a belt that more closely resembles the case used by the old .404 Jeffery as well as the later Winchester Super Short Magnum (WSSM) line of cartridges. It has a rebated rim, bottleneck casing with a 1:9.5 twist on a large rifle magnum primer. In today’s world, better to sugar coat it than to sound like we may be mocking. Many target shooters found this to be detrimental to extreme accuracy. The .270 Winchester and 270 WSM (along with the .270 Weatherby and the 6.8 SPC) use the same .277″ diameter bullets. After all we wouldn’t want to hurt someone’s sensitive feelings. Finally, it’s also nice to have that extra round or two of ammunition in your magazine available if you end up needing it one day. The.300 Win Mag and 7mm Rem Mag cartridges hit the market around the same time and are both hugely popular in the hunting and shooting communities. can use bullets of 120 grains, but things usually top out at 175 or 185 grains. Is the 325 WSM capable of excellent accuracy? Not surprisingly, many sportsmen and women were a little skeptical about the line of Winchester Short Magnum cartridges introduced in the early 2000s that claimed to offer even better performance than these legendary centerfire rifle hunting cartridges. Both cartridges are also well suited for hand loaders and reloading components for the 7mm Remington Magnum and 7mm Winchester Short Magnum are widely available. Please note, the following information reflects the estimated average ballistics for each caliber and does not pertain to a particular manufacturer, bullet weight, or jacketing type. It’s not a gigantic difference, but this often means that the 270 WSM has a definite advantage in terms of external ballistics and sometimes slightly less recoil, but that the .270 Winchester is more often available in shorter, lighter, and easier to handle rifles. As you can see, both AccuBond loads have similar ballistics, but the 325 WSM AccuBond load has a slightly flatter trajectory while the .338 Win Mag AccuBond load retains more kinetic energy at all ranges. You can even use them both on larger game like kudu, eland, red stag, elk, and moose with great results. But just like with trajectory though, they are close enough that you can say they have essentially the same amount of wind drift. At the same time, the 300 WSM has most closely lived up to the hype, which explains why it’s far and away the most popular of the bunch. This is obviously not great news for fans of the 7mm Winchester Short Magnum and does not bode well for the future of the cartridge. 270 WSM vs 270 Winchester Though I doubt that a well placed shot on an animal with an extra 200 feet per second of velocity or 250 foot pounds of energy will make a big difference, it won’t necessarily hurt either and I can see why someone would want that extra power, especially when hunting game like elk and moose. Just like with the 7mm WSM vs 7mm Rem Mag, even though the 300 WSM uses a case with a larger diameter, the .300 Win Mag also uses a relatively large diameter case itself and is significantly longer. The 270 WSM is by no means rare though and most sporting goods stores carry ammunition for both cartridges. Is the 270 WSM capable of excellent accuracy? Specifically, 180 grain, 200 grain, and 220 grain bullets are most popular for 325 WSM factory ammo. Though it’s possible to find rifles chambered in .300 Win Mag with a larger magazine, that’s a pretty typical magazine size for the cartridge. Additionally, the .338 Winchester Magnum is a traditional belted magnum while the 325 WSM has a rebated rim and no belt. Hunters who look hard enough can probably find what they need, but it can be challenging sometimes. The generally better feeding and overall reliability of most 7mm Remington Magnum rifles is a big plus as well. A 300 SAUM-Ackley might shave a couple grains off a WSM load while achieving the same speed, but that seems like a poor tradeoff when you need to buy all custom (dies, reamer) and fireform to get going when compared to a WSM with off the shelf stuff everywhere ready to go. W. Dec 28, 2008 #38 J. jkrswld New Member. Ok let’s give them the benefit of the doubt and say they like availability and reliable feeding. Both cartridges also offer a substantial increase in power, both in terms of bullet frontal surface area and kinetic energy, over the 300 Magnums as well. What about when comparing bullets of the same or very similar weight? Looking at it that way, it’s not surprising that the 7mm WSM is likely on its way out. For instance, the vast majority of 7mm Rem Mag factory loads shoot bullets in the 139-175 grain range. They’re both solid performing cartridges, but I’d personally choose the 7mm Remington Magnum over the 7mm Winchester Short Magnum. 7mm wsm vs 7mm/300 wsm After my last what to do the the 708 post i started looking at these two options .From what i understand the only real advantage of the 7mm /300 is the longer neck , Is it really worth the hassle of necking down or is the standard 7mmWsm fine . The 300 WSM and 325 WSM also have the benefit of doing all of the above with a modest decrease in recoil compared to the .300 Win Mag and .338 Win Mag while the 270 WSM offers a definite improvement in velocity over the .270 Winchester. The first three cartridges were all designed and marketed specifically as short action alternatives to extremely popular and effective standard length cartridges: the .270 Winchester for the .270 Winchester Short Magnum, the 7mm Remington Magnum for the 7mm Winchester Short Magnum, and the .300 Winchester Magnum for the 300 Winchester Short Magnum. Probably not. All four loads used a 200 yard zero.Just like you’d expect, there is virtually no difference between the trajectory of each cartridge. What about accuracy of the 270 Winchester vs 270 WSM? All told, both are wonderful cartridges for hunting some of the larger species of North American big game or African plains game. Much to Mark’s delight, Ryan Muckenhirn joins him and Jimmy to discuss the 300 WSM. 7mm WSM vs 7mm Rem Mag That said I would not build a 30 cal for the application @topclass2017 mentions. So, while the rifle chambered in 7mm WSM is not really any lighter, it’s a tiny bit shorter and handier. The .270 Winchester is one of the most popular centerfire rifle cartridges in North America and is very likely among the Top 10 (maybe Top 5) best selling rifle cartridges in the United States each year. Felt recoil will vary from shooter to shooter and rifle to rifle, but free recoil energy is still a useful way to compare cartridges.As you can see, the two cartridges have almost identical amounts of recoil with the 7mm Rem Mag in this particular example actually having a tiny bit less free recoil energy than the 7mm WSM. Maybe, but probably not. Or was the Winchester Short Magnum line of cartridges just a scheme by Winchester to sell new rifles that’s cleverly disguised by a bunch of marketing hype? However, their .555″ case diameter is larger than those used by the 7mm Rem Mag and .300 Win Mag (.513″) as well as the .270 Winchester (.470″). Overall, the .338 AccuBond load is the best here with the 325 WSM AccuBond coming in a relatively close second. What about accuracy of the 325 WSM vs 338 Win Mag? However, the 325 Winchester Short Magnum doesn’t have a closely related standard length cousin that’s widely used in North America. Absolutely. However, the two cartridges have some similarities as well. Anyhow, I like the concept of the wsm family of cartridges. Below you can see the differences between the 325 Winchester Magnum and the .338 Winchester Short Magnum in terms of external dimensions. This specific model weighs 7.25 pounds when chambered in both 325 WSM and .338 Winchester Magnum. Now, the Winchester Short Magnum cartridges were not the first commercially produced short magnums. This shouldn’t be surprising though because the 300 WSM is specifically designed to fit in a short action rifle instead of a standard length action like the larger .300 Winchester Magnum. What about accuracy of the 7mm WSM vs 7mm Rem Mag? Both are wonderful for situations like hunting mule deer in Arizona or pronghorn in Wyoming. I think we can agree that most hunters and shooters in North America are probably familiar with the venerable .270 Winchester, 7mm Remington Magnum, .300 Winchester Magnum cartridges. Both are also capable of outstanding accuracy in the right hands. This is not a hard and fast rule though and it’s sometimes possible to find rifles chambered in 7mm Remington Magnum that can accommodate another round or two compared to those chambered in 7mm WSM. However, other cartridges, like the 6.5 Creedmoor and .308 Winchester (which have overall lengths of 2.825″ and 2.81″ respectively), are about a half inch shorter and will therefore fit into what’s commonly known as a “short-action” rifle. However, Winchester made a big splash with the .300 Winchester Short Magnum in 2001 and followed up with the .270 Winchester Short Magnum and 7mm Winchester Short Magnum cartridges in 2002. Ruger's M77 compacts might be also. After all, fans of the Winchester Short Magnum cartridges like to point out the benefits of the shorter and fatter powder column. Both cartridges use cases derived from the long, belted .375 H&H Magnum. Additionally, the .300 Win Mag has a shoulder moved further forward than the 7mm Rem Mag. The chart below compares how much a 10 mile per hour crosswind impacts those same four loads out to 500 yards.Once again, the results are mixed. After all, fans of the Winchester Short Magnum cartridges like to point out the benefits of the shorter and fatter powder column. First, the .300 Win Mag is a lot longer. However, both the 7mm Remington Magnum and 7mm Winchester Short Magnum cartridges are capable of excellent accuracy in the right hands and will get the job done under most circumstances if the shooter is up to the task. Indeed, the 6.5 Remington Magnum, the .350 Remington Magnum, and the line of proprietary Lazzeroni cartridges all came on the scene before the WSM line, but none really caught fire for various reasons. This is illustrated in the table below comparing Federal Premium and Hornady factory ammunition loaded with 180gr Trophy Bonded Tip (.500 BC) and 200gr Hornady ELD-X (.597 BC) bullets in .300 Winchester Magnum and 300 Winchester Short Magnum. Killed deer out to 400 yds., a 12' croc in Africa, a 350# WV bear at 48 yds. This helps support the blog and allows me to continue to create free content that’s useful to hunters like yourself. This is illustrated in the table below comparing Nosler Trophy Grade and Winchester Power Max Bonded factory ammunition loaded with 200gr AccuBond (.450 BC) and 220gr (.403 BC) Bonded Rapid Expansion Hollow Point bullets in 325 Winchester Short Magnum and 225gr (.550) AccuBond and 200gr Bonded Rapid Expansion Hollow Point (.323 BC) bullets in .338 Winchester Magnum. Performance The 7mm WSM delivers best performance when loaded with 140 to 162 grain bullets. The 270 Winchester Short Magnum very likely does gain some accuracy benefit from its shorter powder column. Bob, some shooters, primarily competitors, think 7 WSM has too much powder capacity. First, the 7mm Remington Magnum cartridge is significantly longer. You got to figure one or two should survive. In that same vein, those fat, stubby 270 WSM cartridges with their very steep shoulder angle can sometimes present feeding problems. That’s is because the 325 Winchester Short Magnum load in question uses about 12% less powder than the .338 Win Mag. The 7mm is a belted cartridge and the 300wsm is a rimmed cartridge. Anyhow, good luck with your choice. I have talked to a couple of them that said they were only getting 400~500 rounds out of a barrel. This makes sense since the 270 WSM is specifically designed to fit in a short action rifle instead of a standard length action like the .270 Winchester. But the 300 WSM … In this article, I’m going to do a detailed analysis of the 270, 7mm, 300, and 325 Winchester Short Magnum cartridges and compare them to the .270 Winchester, the 7mm Remington Magnum, the .300 Winchester Magnum, and the .338 Winchester Magnum in an effort to answer the above questions and parse out the their true strengths and weaknesses so you can make an informed decision regarding which one will work best for you. This is illustrated in the table below comparing Federal Premium factory ammunition loaded with 130gr Trophy Bonded Tip (.44 BC) and 150gr Nosler Partition (.466 BC) bullets in .270 Winchester and 270 WSM. Well, the 200gr 325 WSM bullet starts off with a little bit less muzzle energy than the 200 grain .338 Win Mag bullet, but the 325 WSM is more aerodynamic and pulls ahead in the energy and trajectory departments at 100 yards and 300 yards respectively. I currently have hunting and target rifles in .308, 30-06, 300 WSM, and 300 Ack. 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