The .300 WSM is adaquate for hunting moose, black bear, brown bear, elk, mule deer, and white-tailed deer in forests and plains where long range, flat shots are necessary. The design has no parent case and is based off a .308 bullet with a 1:10 twist and large riflemagnum primer. The fast-stepping 150 grain deer load is easy to shoot, and Immediately, we saw this low-pressure variation was consistently minimal in the .300 WSM. It is the most accurate large-caliber cartridge I know. But the rifle is a 23" barrel and had the best accuracy in the middle of the published Give a Gift   It was seldom greater than EVs of any higher charge weight and definitely averaged less than other .30-caliber magnums. The .300 WSM magazine expands the short action double stack line to accommodate WSM calibers, SAUM calibers and the new 6.5 PRC. Hodgdon’s online data shows they broke 2,800 fps with a 200-grain bullet with several propellants that we were not able to get before the Speer Reloading Manual #14 had to go to press. I don't do compressed loads. The .300 WSM also head spaces off its case shoulder versus the older 300 Winchester Magnum's belted head space engineered design. Next, we pit subsonic rivals against each other before stretching the legs of this CQB round out to 600 yards from a short 9-inch barrel. As far as case capacity goes, the WSM runs on a bit less powder, but not enough to really make any sort of long term difference. By and large, the 270 WSM, 7mm WSM, 300 WSM, and 325 WSM are all capable of excellent accuracy and essentially duplicate the performance of comparable standard length cartridges while fitting in a short action. and is not a belted case It looks like you could build one on a short action. Tom Beckstrand and Neal Emery of Hornady highlight the 6MM Creedmoor ammo. Cartridge Type: RifleHeight: 2.1\"Width: 0.533\"Average FPS: 3078Average Energy: 3576Average Gr: 170Recoil: 2.36Power Rank: 5.23 of 20 The .300 Winchester Short Magnum (.300 WSM) was designed in 2001 by Winchester Repeating ArmsCompany. The .308 Winchester and the PPC line of cartridges have been praised for their geometry, and the .300 WSM follows in that trend. However, we were under pressure to get data out and had to temper our enthusiasm—some things we learned came later. There are lots that work well in the This means the .300 WSM A lot of verbiage has described the Short Magnums as “based on” the .404 Jeffery case, but the better description is that they were “inspired by” the old British workhorse. It provides high speed and excellent accuracy with 125- to 180-grain bullets in the .300 WSM. And while that theory may hold water, the WSM design garners one major complaint: they don’t feed well. The .300 Winchester Magnum was also designed with a very short neck—0.264″ long to be precise—and has been criticized for it. So who gets the award? Incidentally, we saw this same behavior in the .300 Remington Short Action Ultra Magnum that also falls within Jamison’s patent parameters. No self-respecting magnum cartridge of the 20th century would have shown its face on the market without the Holland & Holland belt, though very few of them—excepting the straight-walled affairs—needed them at all. Not great accuracy, so far. The .300 WSM is the antithesis of the old .300 H&H. The .300 WSM is also used in benchrest shooting. ©2020 Outdoor Sportsman Group. In the Model 700, Accurate’s 4350 turned in an extreme spread … Loosely based on a shortened .404 Jeffery, this short-action cartridge was designed and hyped to match the ballistics of its older Winchester sibling in a lighter rifle with a more rigid action. A lack of “pickiness” about propellant burning rates. It has a range of bullet weights from 125 to 200 grains though most would agree that the 150-180 gr bullets often work the best with the cartridge. If “efficiency” is getting the most output from the least input, Jamison’s concept seems to be working. My Speer development team was keen to jump into learning about a new cartridge from the ground up. ISS Prop House gives us the rundown on the guns used in Enemy at the Gate. Shooting the .300, WSM at ranges out to 1500 yards was easier than I had planed due to its flatter trajectory , accuracy and speed advantage over the .308. Accuracy and Tuning Ease — The .300 WSM tunes more easily and is more tolerant than any of the four 6mmBR barrels I’ve shot. |   For highly efficient and consistent powder burning, the.300 WSM has a short-fat powder column geometry, a concept revered by accuracy-obsessed benchrest shooters for nearly three decades. The extreme variation (or EV—the highest value in one data set subtracted from the lowest) for the lower charge weight pressures was usually conspicuously higher than those of charge weights closer to maximum pressure. The .404 Jeffery, at 0.545 inch, is smaller ahead of the rim than either Winchester or Remington short/fat designs; they are 0.555 inch and 0.550 inch respectively. Nosler used Winchester brass and primers for these loads. Tikka .300 WSM Review 05-11-2008, 13:06 Well I finally got out to the range yesterday and I am whopped! Fast forward to the beginning of the 21st century, and you’ll see the 2001 release of the .300 Winchester Short Magnum. In addition, the girth of the cartridge robs magazine capacity; they're fat and take up more room in the rifle’s magazine. It drove the .300 Holland & Holland completely out of the lime light, taking the crown as the preeminent .30 caliber magnum. 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