Cartridges are commonly available from 6.5 to 10.4 grams (100 to 160 gr) sizes with 8.4-and-9.7-gram (130 and 150 gr) loads being by far the most popular. So whats so special about the 270 Win? The 30-30 and the 30-06 are other popular rounds that while great for deer, are a bit underpowered for larger game like elk and mule deer. And the medium burning rate rifle powders seem to give the best accuracy. The .270 Winchester was designed somewhere in the 1920's and was released by Winchester. Ballistic Tip Hunting Bullet. 5.8–7.1 grams (90–110 gr) bullets: animals smaller than coyotes. a shorter action resulting in a more compact rifle if desired.

Load Data &Technical Information by Caliber. Winchester factory ballistics quote a muzzle velocity of 3275 fps for the .270 WSM shooting a 130 grain Ballistic Silvertip bullet in a 24 inch barrel. 7mm Remington Ultra Magnum, 7mm Remington Short Action Ultra Magnum, 6.5x54 MS (6.5 Mannlicher-Schoenauer), 8mm Remington Magnum, .460 Weatherby Magnum, .338 Lapua Magnum, .300 Remington Short Action Ultra Magnum, .257 Weatherby Magnum, .375 Weatherby Magnum, .25-35 Winchester, .325 Winchester Short Magnum, .444 Marlin, 7.82mm (.308) Lazzeroni Warbird, .375 A-Square, 6.71mm (.264) Lazzeroni Phantom. The 270 Winchester Short Magnum or 270 WSM is a short, unbelted, magnum cartridge created by necking down the .300 Winchester Short Magnum and fitting it with a .277 caliber bullet.
The writer Jack O'Conner a writer for the magazine Outdoor Life was a huge fan, and he was by far the leading voice for this weapon. While it is true that a .270 Winchester case can be formed from a .30-06 Springfield case, the case length of a .30-06 is 63.3 millimetres (2.494 in) while the case length of a .270 is 64.5 millimetres (2.540 in), the same as a .30-03 Springfield. You can contact me here. So helpful was he in the promotion of this round that Winchester created a wonderful looking mantle gun called the Winchester Model 70 Jack O'Conner that only comes in one round..you guessed it... the 270 Win.

56.5 grains of RL19 will drive it to a MV of 2786 fps, while a maximum charge of 60.5 grains of RL19 will yield a MV of 2975 fps. The US Military picked up the 30-06 years before as a primary round in 1905, and it was used in both World Wars, the Korean War, and Vietnam.

This relatively slow twist limits the length, weight and BC of bullets … IMR 4350 was the most accurate powder tested with this bullet weight. It is a member of the Winchester Short Magnum family of cartridges. For Nosler's 140 grain bullets 56.5 grains of IMR 4350 gives a MV of 2938 fps, and a maximum load of 60.5 grains of IMR 4350 is good for a MV of 3154 fps. [4][5] It drives an 8.4 grams (130 gr) bullet at approximately 960 m/s (3,140 ft/s), later reduced to 930 m/s (3,060 ft/s). So the end result is a round that flies almost as well as the 30-06, better than the 30-30, and has much more of a punch. That's a good round no matter how you look at it. We counted nearly 200 different 6mm bullets! At the range and in the field, this cartridge works well with a variety of bullet / powder combinations.

In regards to power this cartridge beats both the .30-30 and the 30-06. There is a very good selection of bullets in .270 caliber, ranging from about 90-180 grains. Power would be the quick answer. While we have went to great lengths to make sure that it's as accurate as possible this rendering should not be used to generate specs for casings. update the database. The 270 Winchester Short Magnum or 270 WSM is a short, unbelted, magnum cartridge created by necking down the .300 Winchester Short Magnum and fitting it with a .277 caliber bullet. Unlike the other WSMs, the .270 does not simply duplicate the ballistics of an existing cartridge. Note: A full length article about the .270 WSM can be found on the Rifle Cartridges page. [3] It is a member of the Winchester Short Magnum family of cartridges. So it is possible that the .270 Win with it's power and range could be considered the better bullet. 270 Weatherby Magnum Brass.270 Winchester Brass.270 Winchester Short … All of these Nosler loads used Winchester brass, WLRM primers and were tested in a 24" barrel. help to populate the length values. Medium to slow burning propellants are the usually selected for the .270 WSM. See the review of the Winchester Model 70 Jack O'Conner and see the photos. You can also click on the image and a pdf version will open in a new window. bullets, it is not worthing measuring the length and calculating the drift lbs., and at 300 yards 1964 ft. lbs.

*Casing image above is an artist rendering and not a real photo of .270 Winchester Ballistics cartridge. Clearly, the .270 WSM will make an exemplary long range cartridge and it is suitable for consideration as an all-around caliber for thin skinned game. Open up the load data page you wish to download. While we have went to great lengths to make sure that it's as accurate as possible this rendering should not be used to generate specs for casings. Now, this is valuable information regardless, but it is a lot more helpful if you're using bullets that are consistent in length. I am also contacting manufacturers Handloaders have a larger range of options with the availability of bullets in a number of weights from 5.8 to 11.7 grams (90 to 180 gr). There is a very good selection of bullets in .270 caliber, ranging from about 90-180 grains. 270 Winchester Load Data; 270 Winchester Short Magnum (WSM) Load Data; 270 Weatherby Magnum Load Data; 7mm Mauser (7×57) Load Data; 7mm-08 Remington Load Data; ... 270 Caliber Bullets. The correct name for the cartridge, as listed by the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI), is 270 WSM, without a decimal point.

The round was moderately popular for hunting medium to large game as its a bit more potent than the 30-30 and the 30-06.

NOTE: I am not claiming that the Miller stability and Litz drift formulas are for pistol bullets). (e.g. The spent cases I have are no longer than 2.535. I have the: Barnes 140 TSX BT @ … Cartridge Type: RifleHeight: 2.54"Width: 0.473"Average FPS: 3536Average Energy: 3775Average Gr: 136Recoil: 1.82Power Rank: 4.81 of 20. afford a box of every type of bullet to measure them, I am asking for your The muzzle energy of this load is 3,096 ft. 9.1–10.4 grams (140–160 gr) bullets: deer, elk, moose, and some larger animals. With modern bullets and optics, it is easily a 1,000 yard cartridge. Our favorite powders for the .270 include 4350, 4831, and RL19. The lead tip on the Sierra GKs I like almost never give a consistent measurement from bullet to bullet, and Hornady SSTs will even vary as much as .010" from bullet to bullet. In 2002 Winchester introduced new cartridges in its Winchester Short Magnum family, including the 7 mm WSM and 270 WSM. Velocities tend to be about 250 ft/s (76 m/s) faster, in a cartridge that is shorter and can therefore be used in Two additional bullet weights were soon introduced: a 6.5 grams (100 gr) hollow-point bullet for vermin shooting, and a 9.7 grams (150 gr) bullet for deer, elk, and moose in big-game hunting. Nosler Inc  |  Privacy  Use  Order Processing. The .300 WSM closely mimics the long-popular .300 Winchester Magnum, while the 7mm WSM matches performance of the 7mm Remington Magnum in similar barrel lengths. It hangs with the 30-30 and 30-06 until about the 250 yard mark as far as drop goes it then goes on to out-fly the 30-30, but the 30-06 beats it out. Nearly all rifles chambered for 270 caliber are fitted with 1:10” twist barrels.

applicable to all of these bullets -- they are probably not. Right click on the image of the load data and use save as.

I will use manufacturer's data over user submitted data unless the manufacturer's Here are some specifications of interest to .270 WSM reloaders: bullet diameter .277", maximum COL 2.86", maximum case length 2.10". and the powerful .270 Weatherby Magnum.

you don't have to enter the bullet length to calculate the drift. It has much to do with the fact that this round was produced a bit late, in the 20's like we said. .270 Winchester-Hornady SP InterLock, .270 Winchester-Winchester XP3, .270 Winchester Short Magnum-CorBon DPX, .270 Winchester-Remington Swift A-Frame PSP, .270 Winchester Short Magnum-Winchester XP3, .270 Winchester-Remington Bronze Point, .270 Winchester Short Magnum-Nosler AccuBond, .270 Winchester-Hornady LM InterLock, .270 Winchester-Norma Soft Point, .270 Winchester-RWS Cone Point, .270 Winchester Short Magnum-Federal Nosler Partition, .270 Winchester-Hornady BTSP InterLock, .270 Winchester-Sellier & Bellot PTS, .270 Winchester Short Magnum-Winchester Ballistic Silvertip, .270 Winchester-Winchester Power Point. .218 Bee, .243 Winchester Super Short Magnum (WSSM), 7.21mm (.284) Lazzeroni Firebird, .303 British, .308 Winchester (7.62mm NATO), .300 Dakota, 8x57mm Mauser JS, .300 Savage, .41 Remington Magnum, .45 Winchester Magnum, .44 Remington Magnum (Pistol Data), .380 Auto (9mm Browning Short), .223 Winchester Super Short Magnum (WSSM), .44 Remington Magnum (Rifle Data), .375 Dakota. Here are some specifications of interest to .270 WSM reloaders: bullet diameter .277", maximum COL 2.86", maximum case length 2.10". I am in the process of adding bullet lengths to the library so that the drift Reasonable powders include AA-3100, H4350, IMR 4350, and RL-19.

However, "The slight difference in length of reformed cases doesn't make any practical difference. Because this is a public effort, I'll leave this page up for others to use. The correct name for the cartridge, as listed by the Sporting Arms and Ammunition Manufacturers' Institute (SAAMI), is 270 WSM, without a decimal point. The .325 WSM is in a league of its own in North America as the 8 mm caliber has not become commonplace. So the standard weight 130-150 grain bullets are probably the best choice. So why is the .270 Win not the most popular round? The 30-30 and the 30-06 are other popular rounds that while great for deer, are a bit underpowered for larger game like elk and mule deer.


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