In analyzing thousands of pressure data sheets, I was accustomed to seeing traditional magnum rifle cartridges show ballistic consistency issues at lower charge weights. We later added lighter bullets. Has anybody built a .300 WSM rifle ? I'm just finishing up a load for my 300 wsm and and I don't know if I'll hit those speeds with a 180 accubond. We look at the futuristic .450 Bushmaster and how it compares to the tried and true .45-70. But the rifle is a 23" barrel and had the best accuracy in the middle of the published I feel the more reliable feeding of the .300 Winchester Magnum and the added magazine capacity give the edge to the older design; in addition, ammunition is much more prevalent for the belted cartridge than the WSM. Wow that seems fast in a 24" barrel. This means you have the option to read your magazine on most popular phones and tablets. Big bore semiauto or a lever gun? Tom Beckstrand and Neal Emery of Hornady highlight the 6MM Creedmoor ammo. That’s no bargain. Accuracy and Tuning Ease — The .300 WSM tunes more easily and is more tolerant than any of the four 6mmBR barrels I’ve shot. The .300 Winchester Magnum was also designed with a very short neck—0.264″ long to be precise—and has been criticized for it. The WSM also posted a maximum average velocity only 49 fps less than its bigger, older brother using 14 grains less propellant. James Tarr runs through the 3-Second Headshot drill. Most “tall/skinny” .30-caliber cases from the .30-06 up show this. Once you do get the formula dialed in for the WSM it can be wonderfully accurate, but it’s taken me more time to get things sorted out for the shorter cartridge. Find propper powder. We also screened the 200-grain Hot-Cor—more on this later. From a handloader’s perspective, I’ve found the WSM much more finicky than the belted design, or perhaps I should say that the .300 Winchester Magnum has shown to be easier to develop a load for. 4350-class propellants often give velocities similar to 4831-class propellants. ISS Prop House gives us the rundown on the guns used in Enemy at the Gate. All Rights Reserved. If “efficiency” is getting the most output from the least input, Jamison’s concept seems to be working. 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. It is the most accurate large-caliber cartridge I know. The .300 Blackout is here to stay, and we take some time to look at new technology surrounding this cartridge. The.300 Winchester Magnum —that belted affair based on a shortened Holland and Holland case—was released in 1963 as the last in a quartet of cartridges that redefined magnum performance to the masses. Springfield Armory M1A Tanker .308 Review, Revolver vs. Semiauto Pistol: A Ballistic Oddity, Best Rimfire Cartridges — .22 Magnum vs .22 Long Rifle. I've own several .308s a ,.300 WSM ,a .300 Win Mag,and a .300 RUM. Normally, developing loads for the .30-caliber magnums with varmint-weight bullets was a painful slog through inconsistencies, but the .300 WSM was very well behaved with 110- and 130-grain bullets. With management wanting data yesterday, we skipped them because our early screening showed unimpressive improvement over 200-grain .30-06 velocities. It is used for both big game hunting as well as benchrest target shooting. So who gets the award? It also bests the .300 H&H's case capacity by about 10 percent. On the other hand, the .300 WSM uses only 14 percent more fuel than the .30-06 to get an 11 percent velocity gain, a reasonable return. 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. In the 300WSM, 68-70 grains is a compressed load depending on which powder you use. Max OAL: 2.950" Review (1) vs .300 Win. The .300 WSM magazine expands the short action double stack line to accommodate WSM calibers, SAUM calibers and the new 6.5 PRC. We've got you covered.• .223 Remington vs. .22-250 Remington, E-mail your comments/questions about this site to: EmediaHunter@nrahq.org, For questions/comments about American Hunter magazine, please e-mail:Publications@nrahq.org, You can contact the NRA via phone at: NRA Member Programs1-800-672-3888, To advertise on American Hunter, visit nramediakit.com for more information. Being short and fat, it offers a squat powder column. The results were interesting, and in some cases they were eye-opening. The .300 Winchester Magnum—that belted affair based on a shortened Holland and Holland case—was released in 1963 as the last in a quartet of cartridges that redefined magnum performance to the masses. 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 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 was seldom greater than EVs of any higher charge weight and definitely averaged less than other .30-caliber magnums. Let’s look at those assumptions a bit closer in the following table. The fast-stepping 150 grain deer load is easy to shoot, and Increases in velocity over that of the .30-06 are virtually linear with the increase in propellant, unlike more conventional “tall/skinny” .30-caliber magnums. The patent details ranges of dimensions and ratios between them that cooperate to generate excellent velocities by shortening the pressure’s time to peak and by burning more of the propellant inside the case rather than in the bore. That belt—often mistaken as making a case stronger—can cause some stretching, and often you’ll see a case separate just north of that belt. To get data online quickly, we focused on the most popular hunting bullet weights. A lack of “pickiness” about propellant burning rates. In my load above, I get 2900 fps, +/- … You can train new shooters with that load, and as they grow in stature and experience, increase the recoil incrementally. 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. So far I've worked with R 17 (64.3grs. Tikka .300 WSM Review 05-11-2008, 13:06 Well I finally got out to the range yesterday and I am whopped! 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. Often give velocities similar to 4831-class propellants also designed with a 1:10 twist and large riflemagnum primer and as grow... Case it looks like you could build one on a short action Ultra Magnum also! The crown as the preeminent.30 caliber rebated rim bottlenecked centerfire short Magnum cartridge comes with velocities. You can train new shooters with that load, and as they grow in stature and experience, the! 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