The .300 WSM has proven to be wonderfully accurate in a well-tuned rifle, and when things are built properly it truly is the equal of the .300 Winchester Magnum; it just requires more attention to make sure the cartridge feeds properly. The 300 WSM was the first of the new class of short magnums to see wide use. Once you get used to cycling your action, regardless its length, it’s no big deal. But of dubious value in hunting rifles. If its back at the belt, the cartridge could cant slightly to misalign the bullet with bore. Mag, 300 Win.

7.62x39mm.220 Russian.

To get data online quickly, we focused on the most popular hunting bullet weights. (14.10 mm), Inside diameter (of case): .538 in. Nonetheless, the cartridge is a unique design, intended to duplicate the ballistics of the venerated .300 Winchester Magnum, released in 1963. To straighten the case mouth, run the case part way into the sizer die and let the expander ball straighten the brass. The WSM also posted a maximum average velocity only 49 fps less than its bigger, older brother using 14 grains less propellant. That and it isn't a wildcat which for some reason I really want for my next rifle. Anyone have or used a Leupold SX-2 Apline HD spotting scope?

The ballistic performance of the .25 WSSM is based off 5 grain types and has a velocity of 3,775 ft/s (75 gr), 3,547 ft/s (85 gr), 3.264 ft/s (100 gr), 2,999 ft/s (115 gr), and 2,985 ft/s (120 … Using the base diameter of the common H&H belted case (presumably for ease of manufacturing) instead of that of the slightly larger Jeffery parent case, the .300 WSM has a slightly rebated rim.

Its still a wild cat 338, and you can use your barrel, but its just alot easier on case necks to go from big(323) to bigger(338) vs. small(284) to big(338). with the same bullet from a .30-06.

If you already have a 300 Win. What I want to do is push 210-225 grain bullets out of a 28 inch barrel at close to 3000fps. on an African kudu hunt. That means the 300 WSM does indeed cycle through short-action rifles, and those are always ballyhooed as being shorter, lighter, stiffer, and faster to run than standard- or magnum-length actions. cases to headspace on the shoulder anyway.

All of the WSM cartridges are inspired on the .404 Jeffery non-belted magnum cartridge which is shortened to fit a short rifle action (such as a .308 Winchester).[1].

This short, fat case is supposed to match the ballistics of the old, long 300 Win. The parent case is based off a .300 Winchester Short Magnum by shortening it.

With all new rifle brass, you should first straighten out the case and case mouth, then chamfer and debur the case mouth inside and out.

Flex in the action can result in slight bending of the bolt/breech lock-up and alignment of the cartridge in the chamber. Which gives you, the patron, more of the information and entertainment you enjoy.

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. I guess that means the powder burns hotter or more completely with fewer unburned kernels blown out the muzzle. This holds it firmly against the bolt face for proper firing pin impact. while burning 10 percent less powder; cycling through shorter, lighter rifles; being inherently more accurate; recoiling less; and killing like lightning cross bred with the hammer of Thor. For decades our biggest, fastest magnums have been based on the long, belted H&H magnum case, which is the parent case for the 300 Winchester Magnum, the 7mm Rem. You won’t see this reduced powder charge reflected in factory ammunition prices, but if you handload and shoot hundreds of rounds a year, you can save a few dollars with the 300 WSM. All Shooting Times subscribers now have digital access to their magazine content. Fire forming would be necessary and I'm not sure I want to go that far yet, or if it would even make enough of an improvement to be worth it.

And that’s excuse enough for some of us.

The ability to utilize these high velocity factory loads without having to hand load was one aspect of appeal to hunters who adopted the .300 WSM. We look at the futuristic .450 Bushmaster and how it compares to the tried and true .45-70. You might short stroke it and fail to bring a new round into battery.

Nor have I ever detected a snag, catch, jam, or hiccup when pushing belted cases from magazines to chambers.

Winchester's high quality, durable brass can be reloaded several times. The WSM family of cartridges are Delta L problem cartridges, meaning they can present unexpected chambering and/or feeding problems.

We tested three Speer Hot-Cor Spitzers (150, 165, and 180 grains) plus the 165-grain Trophy Bonded Bear Claw, available as a component then.

If “efficiency” is getting the most output from the least input, Jamison’s concept seems to be working. The theory is that this interferes with cycling and compromises accuracy by potentially misaligning the case in the chamber. I know that it isn't a long range hammer but it would meet a few needs(wants) that I have. Based on the many sub-MOA rifles I’ve shot over the years in 257 Wby, 7mm Rem.

Elk, moose and grizzlies won’t like that. New, unprimed brass. At its base the 300 WSM body spans .555-inch. Compared to a full-length, magnum-action (300 RUM, 300 Wby., 300 H&H Magnum, etc.,) the short-action should be six to eight ounces lighter. If I could do it over, I would spend more time with 200-grain loads. The 6mm Creedmoor is a new member of a wonderful family of 6mm-caliber (.243) cartridges; it's... A unique load for the .450 Bushmaster is Hornady's new Subsonic offering.


The common factory loads run between 150 grains and 200 grains, though the .300 WSM can handle the full range of .30-caliber bullets. Mag.

Kirby Allen or Shawn Carlock would do an out standing job I have no doubt.

I selected lab data using the Speer 180-grain Hot-Cor Spitzer SP and looked for loads producing the highest velocity in a 24-inch SAAMI test barrel and how much propellant it required to reach said velocity.

short-action to a 300 Wby. Quite a few cartridges now fall under this design concept, but the one that saw a meteoric rise in consumer acceptance was the .300 Winchester Short Magnum (WSM). Shows excellent linear tracking of pressure against charge weight in bullet weights from 110 to 200 grains. The information presented here is for general educational purposes only. I wouldn’t. .308 to .338 is more easily achieved, but (325wsm/8mm) .323 to .338 is one pass thru the die, and I would think that would promote much better case life and ease you into wildcatting with a few less steps.

JavaScript is disabled. Cameras, microphones, guns, optics, ammo, vehicles, travel, computers… Your support can play a pivotal role in freeing me up to increase the quantity and quality of my work, much of it in answer to your direct questions. 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. The .270 Winchester Short Magnum (270 WSM) was designed in 2002 by Winchester.

That cartridge in turn mimicked (actually bettered) the performance of the classic .300 H&H Magnum, but in a long-action receiver instead of the magnum receiver required by the .300 H&H, and now in turn, Winchester offered the same velocity from a short-action rifle. U.S. It was so pervasive that we called it “normal” and even adjusted start charge recommendations to avoid these pressure regimes if needed. Always exercise due diligence before purchasing any product or service. The family of .300 magnums grew at the turn of the 21st century, with the 1999 release of the .300 Remington Ultra Magnum and the release of the .300 Winchester Short Magnum in 2001, both based on the classic and underrated .404 Jeffery case. Looking for previous installments of our "Behind the Bullet" series? I plan on using a Wyatts extended magazine box so 3.000 inches shoulden't be a problem and I don't plan on using the really long 338 bullets.

We later added lighter bullets.

Keith Feeley of Tactical Solutions sat down with Michael Bane at SHOT Show 2018 to talk about the new X-Ring Takedown SBR .22LR rifle. But should you sell your beloved, accurate magnum-action rifle just to gain recycling speed? Frank and Tony from Gallery of Guns spice up the Glock test using their non-dominant hands. The history of the .300 WSM is a sordid one, involving lawsuits and court cases; Rick Jamison had a huge part in the development of the design, yet without raking the muck, isn’t always credited for that work (the original name of the .300 WSM was to be the .300 JRW, standing for Jamison, Ruger and Winchester).

The 300 WSM, or Winchester Short Magnum, is magic. For decades our biggest, fastest magnums have been based on the long, belted H&H magnum case, which is the parent case for the 300 Winchester Magnum, the 7mm Rem. All else being equal, a short-action rifle will weigh two to six ounces less than its equivalent standard-action (30-06 length.) Mag.

I did this once when switching from a 7mm-08 Rem. All true.

We also screened the 200-grain Hot-Cor—more on this later. Supposedly it is easier to get a precise alignment of the case/bullet with the bore if the headspacing is at the shoulder. Who knows.

The cartridges in this family are, in order of development: Mauser Series 1100 Deluxe Rifle Review, .375 Ruger & .416 Ruger — Big Bore Cartridges. Mag., most of the Weatherby Magnums and more.

The .300 WSM uses a case which measures 2.100 inches, just .085 inches longer than the .308 Winchester, yet a cartridge overall length of 2.860 inches, compared to the .308’s 2.800-inch overall length. A lack of “pickiness” about propellant burning rates.

Perhaps. It is designed to stop the case against a corresponding rim in the chamber. Tuesday, November 3, 2020. The Winchester .350 Legend is a no-nonsense whitetail thumper tailored for rifle hunters in... James Tarr runs through the 3-Second Headshot drill. It appears to be true that the .300 WSM is more efficient at extracting velocity/energy from its powder than is its longer magnum cousin. Mag.

You should not rely solely on information contained in this email to evaluate the product or service being endorsed. With some smaller caliber cases you may notice the case mouths to be slightly belled. Fortunately my first shot proved fatal and the bull crashed while I was frantically trying to clear my jam. Setting the .30-06 as a baseline, the well-established .300 Winchester Magnum uses 37 percent more propellant than the .30-06 to attain a 13 percent increase in velocity.

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6.5mm Grendel.22 PPC.30 Walker