I spent a lot of time working up loads for this rifle—while I love Weatherby factory ammo, it is a bit pricey for somebody who likes to shoot a lot—and finally settled on a load of 70 grains of IMR 7828, either the 110-grain Nosler AccuBond or 115-grain Nosler Ballistic Tip bullet, and CCI 250 primer. "When Were the Weatherby Cartridges Developed? The .257 Weatherby makes an ideal pronghorn cartridge. Gun writers such as Layne Simpson consider the .257 Weatherby one of his favorite long range cartridges.[2]. Ballistic Table . 0.322. Both SAAMI and the CIP have published specification for the cartridge. While the CIP recognizes the correct radii for both the r1 and r2 values, they treat the transition from the body to shoulder and neck to shoulder as filet radii. The ballistic performance based off four grain types for velocity is 3,825 ft/s (87 gr), 3,602 ft/s (100 gr), 3,400 ft/s (117 gr) and 3,305 ft/s (120 gr). How to Sight in a Scope - Step by Step Guide. Bulk Ammunition on sale, including 257 Weatherby Mag Rifle Rounds. All figures are based on factory Weatherby ammunition and not “hot” handloads. is good for medium sized game on long range performance with a flat trajectory up to the size of deer, but can be a bit much for larger game such as Elk using factory loads with out well placed shots around 175 yards. Get it as soon as Tue, Dec 29. Together with the .270 Weatherby Magnum, the 7mm Weatherby Magnum, and the .300 Weatherby Magnum, the .257 Weatherby Magnum were the earliest cartridges introduced by Roy Weatherby. Compared to the Winchester's .270 WSM SXP270S ammunition show a bullet drop of 24.5 in (62 cm) but retains 1,552 ft⋅lbf (2,104 J). Weatherby brand brass in 257 is easy to come by. There are light to heavy grain factory loads for the .257 Weatherby Mag. However, due to lower ballistic coefficients of these bullets, velocity (and therefore energy) is shed more quickly. It is capable of firing a 115 gr (7.5 g) Nosler Ballistic Tip bullet at 3,400 ft/s (1,036 m/s) generating 2,952 ft⋅lbf (4,002 J) of energy[3] which is comparable to factory loadings of the .30-06 Springfield and the .35 Whelen in terms of energy. MTM H50-RS Deluxe 50-Round Rifle Ammo Case Box 223 5.56x45 204 Ruger. The ballistic reports of this cartridge might say otherwise, however taking down an animal depends on a lot more than just the ballistic reports. Red Oak, White, or Chestnut for Deer Herd? 257 Weatherby Magnum. ", https://en.wikipedia.org/w/index.php?title=.257_Weatherby_Magnum&oldid=983871702, Creative Commons Attribution-ShareAlike License, This page was last edited on 16 October 2020, at 19:07. Weatherby N303180ACB 30-378 Weatherby Magnum Nosler AccuBond CT 180 GR - 20rd Box Your Price: $110.14 ($5.507 per round) In stock Purchase Now » View Details » Reloading data for 257 WEATHERBY MAGNUM. As the bore diameter of the .257 Weatherby Magnum is .250 inches this would make it a 6.35 mm caliber cartridge which uses 6.5 mm bullets (not to be confused with 6.5 mm caliber cartridges which use 6.7 mm/.264" bullets). The shoulder continuously curves and transitions from the body radius to the neck radius at the point of tangency at the shoulder between the two radii. Both SAAMI and Weatherby recommend a freebore of .378 in (9.6 mm). Giving the barrel time to cool between each discharge of the weapon and following recommended cleaning procedures will help mitigate this issue and extend the usable life of the firearm chambered for this cartridge. .257 Weatherby Magnum 120 Grain Nosler Partition~ The .257 Weatherby Magnum is a .257 Caliber (6.35 mm) belted bottlenecked cartridge.It is one of the original standard length magnums developed by shortening the .375 H&H Magnum case to approx. The parent case design is based off the .375 H&H Magnum by shortening the neck to fit the .257 inch (6.53mm) bullet. 257 Weatherby Magnum Ammo Sort By: Price Per Round Low To High Price: Low to High Price: High to Low Newest Best Selling Best Rating Most Reviews 20 per page 40 per page 60 per page 80 per page 100 per page 120 per page View All FREE Shipping on orders over $25 shipped by Amazon. Since then, all Weatherby Ammunition has been manufactured by Norma with the exception of a brief period of time between 1963 and 1964 when production moved to RWS/Dynamit-Nobel, a company which had entered into partnership with Weatherby. NOSLER RIFLES. I believe that there is a large number of hunters that can testify the efficiency of these magnum rounds on elk hunters. Out of Stock. The search culminated in 1951 with Norma Projektilfabrik being awarded a contract to produce ammunition. It is based on the belted 300 H&H case shortened, blown out, and necked down. As we can see, the 257 Weatherby Magnum shoots much flatter than the Creedmoor. This is especially true in major grasslands such as prairies, steppes, Pampas, or savannah; or in mountainous terrain such as the Rockies, Alps or the Himalayas. Written inquires can be mailed to: Weatherby, Inc. PO Box 6630 Sheridan, WY 82801 USA BUY NOW Beginning in 1948 Weatherby began offering loaded ammunition for the .257 Weatherby Magnum cartridge which was loaded in house. However, due to space and organizational constraints Weatherby began looking for a source of ammunition for his cartridge. OK. With that said, the handloader will be pressed to match the Weatherby ammunition in … is an all over bore cartridge for a large rifle with a 1:10 twist. When developing handloads for various rifles in .257 Magnum I have never found it difficult to duplicate the velocity of Weatherby factory ammunition. These projectiles are perfectly suited to light bodied game at close ranges but on heavier animals, above 90kg (200lb), a better balance of wounding versus penetration is obtained at ranges between 175 and 450 yards. C.O.L. Weatherby continues to chamber the .257 Weatherby Magnum in several models based on both the Mark V and Vanguard action types. For this reason the body and neck dimensions are lengthened and a shoulder angle provided. The .257 Weatherby Magnum was one of the first cartridges which used the shortened, blown out and necked down .375 H&H Magnum case and served as the forerunner to the standard length magnum cartridges such as the 7mm Remington Magnum and the .338 Winchester Magnum. .257 has loads for 110 grain bullets from 2800 to 3300 fps, with bullets having a ballistic coefficient (BC) of .39 the .30-06 has loads for 110 grain bullets from 2900 to 3400 fps, with BC of .25 and .29 Since I have actually wrote the code for the ballistics calculator in Gun Log, let me illustrate the significance of the BC..257 Weather Mag The .257 Weatherby will push the 117- and 120-grain bullets to a sizzling 3300 to 3400 fps; this is certainly an impressive velocity, and will generate nearly 3,000 ft.-lbs. The .257 is the ideal vessel for driving the 115 grain Ballistic Tip and 117 grain SST out to longer ranges with devastating results. He uses the zeiss conquest with the rapid z varmint reticle. The 257 Weatherby Magnum is one of Roy Weatherby's favorite calibers. This translates to all sorts of hydraulic shock, which is the primary reason that proponents of the .257 Weatherby swear by the cartridge. The .257 Wby. It's my most accurate rifle, repeatedly putting 3-shot groups at 200 yards around half an inch with factory ammo, whether the Ballistic Tip or the Accubond. I was recently on a hunt in Texas, with a couple other prominent gun writers—I bet you … Bullet weight. Hornady's 117 gr (7.6 g) round nose bullet is made for such firearms which have the slower spin rate. Type: Unprimed Case Material: Brass Size:.257 Cal Style: Magnum Gun Type: Rifle Metal Type: Brass Caliber Or Gauge: 257 Weatherby … Remington Arms manufactures released the Special Editions of the Model 700 CDL SF and the Model 700 LSS in 2008. Furthermore, barrel heating and wear are a consideration when employing the .257 Weatherby for such duties where one would shoot long strings of shots in a short period of time. Home / Rifle Ammunition / 257 Wby Mag. The bullet has been known to break-up on impact, leaving animals able to escape with severe but non-fatal wounds. Handloads for the .257. The .257 Weatherby Magnum was designed in 1944 and introduced commercially in 1945 by Roy Weatherby as a wildcat cartridge as a chambering in his rifles. Cartridge Type: RifleHeight: 2.549"Width: 0.531"Average FPS: 3408Average Energy: 2836Average Gr: 110Recoil: 1.76Power Rank: 3.75 of 20. The Weatherby Custom Shop offers a more personalized rifle based on these actions. Bullets which open quickly and have a weight ranging between 95–110 gr (6.2–7.1 g) such as the Nosler Ballistic Tip bullet are excellent choices for this game species. Today, IMR 4350 is considered too fast a burning propellant for the cartridge which comes into its own with the slowest burning powders now available. Look for the brands you trust like Hornady, Federal, Nosler, and more! SAAMI recommends a barrel rifling contour of 6 grooves with a bore Ø of .2505 in (6.36 mm) and a groove Ø of .257 in (6.5 mm) with each groove being .098 in (2.5 mm) wide. Weatherby magnum ammunition features norma precision brass and cnc-machined primer pockets produced to match-grade specifications. $50 - 99.99; Weatherby Select Plus Ammunition, 257 Weatherby, 120 Grain, Nosler Partition, 20 Round Box N257120PT There has been some speculation that Roy Weatherby may have used the full length .375 H&H Magnum case if he had slow burning powders available today when the cartridge was designed. .257 Weatherby Magnum Minimum Maximum Bullet Weight: 90 gr Case Trim Length: 2.539" S.D. The N257115BST bullet retains enough energy to be effective on deer out to 550 yd (500 m) while the SXP270S's bullet extends this range out by a further 100 yd (91 m) although both the Weatherby's and Winchester's ammunition start with roughly the same muzzle energy. Until then the cartridge was only available as a component brass which would require being loaded before use. B.C. Great care has been given by Hornady engineers to develop superior, match­-accurate hunting loads that allow the ELD­-X ® bullet to achieve its maximum ballistic potential. .257 Weatherby Magnum-Weatherby BST, .257 Weatherby Magnum-Nosler AccuBond, .257 Weatherby Magnum-Weatherby Pointed-Expanding, .257 Weatherby Magnum-Nosler Ballistic Tip, .257 Weatherby Magnum-Weatherby Round Nose-Expanding, .257 Weatherby Magnum-Nosler Partition, .257 Weatherby Magnum-Weatherby Nosler AccuBond, .257 Weatherby Magnum-Weatherby Pointed-Expanding, .257 Weatherby Magnum-Nosler Partition, .257 Weatherby Magnum-Weatherby Barnes TSX, .257 Weatherby Magnum-Nosler Ballistic Tip, .257 Weatherby Magnum-Weatherby Nosler Partition, .257 Weatherby Magnum-CorBon DPX. The .257 Weatherby is a hunting cartridge and has not, to a significant extent, been adopted into any other shooting discipline. The 257 Weatherby Magnum is one of Roy Weatherby's favorite calibers. The consequence of burning a large quantity of powder and driving a bullet faster is poor barrel life and throat erosion all of which affects accuracy and usable life of the firearm. 257 Wby Mag Showing all 2 results. It's Cerakoted in black, and has a factory-installed Accubrake. Ballistics with a 300-yard zero are 2 to 3 inches high at 100 yards and only 7 to 9 inches low at 400 yards. The .257 Weatherby Magnum is one of the most overbore cartridges available. Cartridge Type: Rifle Height: 2.549" Width: 0.531" Average FPS: 3408 Average Energy: 2836 Average Gr: 110 Recoil: 1.76 Power Rank: 3.75 of 20 The .257 Weatherby Magnum was designed by Roy Weatherby in 1944 and was first introduced into the market during 1948. The cartridge is an excellent choice for smaller deer species such as whitetail and mule deer. The original cartridge was developed using the H&H Super 30 (a close variant of the .300 H&H Magnum which in turn is based on the .375 H&H Magnum) shortened, blown out, and necked down to accept a .25 caliber (6.35 mm) bullet. Read more Showing all 2 results. [4], The original cartridges were formed using Winchester's .300 H&H Magnum (H&H Super 30) and was only available as a component from Weatherby. 7mm Remington Magnum, .338 Winchester Magnum, .280 Remington, .300 Dakota, .375 Ruger, .270 Winchester, .405 Winchester, .257 Weatherby Magnum, .458 Winchester Magnum, .264 Winchester Magnum, 7mm Weatherby Magnum, .404 Dakota, .375 Dakota, .270 Weatherby Magnum, 7mm Dakota. Of the cartridges developed by Roy Weatherby, the .257 Weatherby Magnum was known to have been his favorite, and the cartridge currently ranks third in Weatherby cartridge sales, after the .30-378 Weatherby Magnum and the .300 Weatherby Magnum. Re: 25-06 vs 257 Weatherby Mag My fathers 257 weatherby with a 27 inch barrel on a sako action pushes 110 nosler acubonds at 2650. 4.6 out of 5 stars 59. 270 Weatherby Magnum Developed 1943 / Produced 1945 Was one of the first Weatherby Magnums offered to customers. .500-465 Nitro Express, .25 Winchester Super Short Magnum (WSSM), 7mm Weatherby Magnum, .32 Short Colt, .500 Jeffery, .44 Remington Magnum (Rifle Data), .300 Winchester Magnum, 6.53mm (.257) Lazzeroni Scramjet, .416 Weatherby Magnum, .264 Winchester Magnum, .32 Winchester Special, .38-55 Winchester, .338-378 Weatherby, .223 Winchester Super Short Magnum (WSSM), 8.59mm (.338) Lazzeroni Titan. Centerfire Rifle Ammunition. Find your best price for 257 Wby Mag Ammo | Best 257 Wby Mag Ammunition - AmmoSeek.com Search Engine 2020 Fired at sea level, 10 mph right angle wind. It is one of the original standard length magnums developed by shortening the .375 H&H Magnum case to approx. Bullets ranging in weight from 100 gr (6.5 g) to 115 gr (7.5 g) should be chosen for these deer species. Due to the cartridge's high velocity and use of lightly constructed bullets, the use of the cartridge as a small game cartridge is not recommended as there are far better choices available which do not destroy the meat as the .257 Weatherby does. The cartridge comes into its own where shooting over long distances is anticipated. Nosler Ballistic Tip Notice that the 30-06 with its 25-grain additional bullet mass cranks out just 140 f-p more energy than the little 115-grain .257 … 03. The .257 Weatherby Magnum is a .257 caliber (6.35 mm) belted bottlenecked cartridge. A turbo 270 WIN that shares a 2.545” length case with the 257, 270, and 7mm Weatherby Magnums. 2.5 in (64 mm). Early .257 Weatherby rifles has a twist rate of 1 revolution in 12 in (300 mm) but all current rifles are manufactured with a twist rate of 1 revolution in 10 in (250 mm). The .257 Weatherby Magnum was designed by Roy Weatherby in 1944 and was first introduced into the market during 1948. The .257 Weatherby Magnum has a case capacity of 84 gr. The .257 Weatherby offers a 300–400 ft/s (91–122 m/s) over the 25-06 Remington cartridge which translates to around 600 ft⋅lbf (810 J) greater energy than the latter cartridge. .257" 25 Spitzer BTSP Weight (grains) 120 Ballistic Coefficient 0.480 Sectional Density 0.260 COAL Tested 3.170" Speer Part No. [5], Ever since the release of the .257 Weatherby Magnum it has remained one of the more popular cartridges in terms of Weatherby sales. Company Directory (307) 675-7800. The 120 gr (7.8 g) Weatherby N257120PT ammunition should not be used in older .257 Weatherby rifles as the twist rate is too slow to adequately stabilize the bullet. [6] The .30 Super Belted Rimless H&H manufactured by Winchester served as the direct parent cartridge for the case design. The parent case design is based off the .375 H&H Magnum by shortening the neck to fit the .257 inch (6.53mm) bullet. Weatherby rifle ammunition for the .257 Weatherby Magnum is manufactured by Norma of Sweden. Of the cartridges developed by Roy Weatherby in 1944, the .257 Weatherby Magnum was known to have been his favorite, and the … Hornady 046277 Full Length Die, 257 Weatherby (.257) $56.03 $ 56. Midsouth offers great deals on all kinds of 257 Weatherby Mag Centerfire Rifle Ammo. The .257 Weatherby Magnum shares the same cartridge case as the .270 Weatherby Magnum and the 7mm Weatherby Magnum. The cartridge rates higher on the overbore index than the .264 Winchester Magnum and the 7mm Shooting Times Westerner but less than the 7mm RUM and the .30-378 Weatherby Magnum. [8] The cartridge is effective against smaller plains game species such as gemsbok, waterbuck, nyala and impala. *Casing image above is an artist rendering and not a real photo of .257 Weatherby Magnum Ballistics cartridge. 257 Weatherby Magnum, 115-gr. The .257 Weatherby Mag. Should the cartridge be employed for plains game in Africa, use should be restricted to game species under 440 lb (200 kg). Thus no hold over is necessary when shooting at game at these ranges given that the rifles is zeroed correctly to accomplish this task. 257 Weatherby Magnum. Initially due to the cartridge's high velocity the cartridge exhibits less bullet drop than most other cartridges. The .257 Weatherby is used as an ideal small predator cartridge for animals such as lynx, cougar, bobcat, fox, coyote, and wolverine, all of which are taken yearly with the cartridge. The treatment of the body-shoulder-neck transition zone accounts for the inconsistencies between SAAMI and CIP official dimensions for the cartridge. Stainless steel barrels can further extend the barrel life of rifles chambered in the 257 Weatherby Magnum. Weatherby guarantees a 1.5 MOA accuracy with their ammunition in a Weatherby rifle, .99 MOA or better with their Sub-MOA Vanguard rifles, and .99 MOA or better with the new Vanguard Series 2 Rifles.[7]. FREE Shipping. CIP limits the .257 Weatherby Magnum to a maximum average pressure of 4,400 bar (64,000 psi). These bullets include most Barnes' bullets over 110 gr (7.1 g) and any conventional spitzer bullet of over 115 gr (7.5 g). Everything from custom, match grade, to bulk plinking ammo can be found at low Midsouth prices. Regardless of whether the barrel measures 24 or 26 inches, I seldom fail to reach, or even exceed, 3500 fps with 100-grain bullets and 3300 fps with bullets weighing 115 to 120 grains, all loaded to acceptable chamber pressures. The CIP standards for the cartridge were published in January 1994. 257 Weatherby Magnum HandLoading & … Roy Weatherby took the .257 Weatherby Magnum to Africa and took an African Cape buffalo with a single shot to prove to himself that it could be done. My 257 is a Mark V Ultralightweight in a McMillan stock. Filter by Brand. Nosler Ballistic Tip 30-06 Govt., 150-gr. The typical pronghorn weighs less than 175 lb (79 kg) and as a small bodied ungulate does not require bullets with a great penetrative ability. When sighted in for 300 yd (270 m) the bullet of Weatherby's N257115BST ammunition has only dropped 21.9 in (56 cm) at 500 yd (460 m) and retains 1,347 ft⋅lbf (1,826 J) energy. 257 Weatherby Mag Rifle Ammo. The recommended optional twist rate is one revolution in 10 in (250 mm). The Weatherby rifles have deeply blued barrels while the Remington rifles have matte stainless steel barrels. The SAAMI dimensions for the cartridge reflect this implementation of shoulder to neck transition. of water (5.45 cm3). 257 Weatherby Magnum 110 Grain Information | Ballistics . Conclusion. Conley Precision Cartridge Company manufactures several premium lines of .257 Weatherby ammunition using Barnes, Nosler, Speer, Swift and Trophy Bonded bullets. Hornady Custom Grade New Dimension 2-Die Set. It requires a 26 inch rifle barrel to achieve optimal performance in shooting. Although the .257 Weatherby is used as an elk and moose cartridge with success in North America, the cartridge is thought of as being ill-suited for these heavier deer, with elk weighing on average 700 lb (320 kg) and moose on average between 1,000–1,400 lb (450–640 kg), depending on subspecies. Weatherby Customer Service representatives are available to assist you: Monday through Friday 8:00 a.m. to 5:00 p.m. (MDT) Visitor/Service Center 9:00 a.m. to 4:00 p.m. (MDT) Customer Service (307) 675-7840. © Copyright GunData.org 2015  |  Koenig Media, LLC   |   Links   |   Sitemap   |   Advertise. The ballistic performance based off four grain type… It’s obvious now how popular the .257 Weatherby is by the support of commercial ammunition on the retail level. Sort By: ... Weatherby B257100TTSX Select Plus 257 Weatherby Mag 100 GR Barnes Tipped TSX 20 Bx 10 Cs MSRP: $99.00 $70.00. Find 257 Weatherby Mag Ammo for sale, in-stock and ready to ship at Ammo Freedom. Trophy Grade 257 WEATHERBY MAGNUM AMMUNITION . Accuracy and terminal performance are the cornerstones of Hornady ® Precision Hunter ® factory loaded ammunition. While the .257 Weatherby can be employed as an effective varmint round, the cost per cartridge and the muzzle blast precludes its use as a varmint cartridge in large numbers. A showing of the more popular .25 caliber ammunition includes (left to right) the .250 Savage, .257 Roberts, .25/06 Remington and the three factory offerings for the .257 Weatherby to include the 87, 100 and 117-grain bullets. being produced by Weatherby that include, Hornady, Nosler & Barnes, in addition to Accubond projectiles. 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. Sources such as Lyman and Weatherby's pressure rating suggest maximum average pressure limit of 66,000 psi (4,600 bar). Bullet. Subscribe to our newsletter. was introduced in 1944, and within Roy's stable of hard-hitting, flat-shooting magnums, the .257 was his fair-haired favorite, which says a lot. However, in Europe cartridge designation nomenclature for a large part relies on the bore diameter. It is one of the original standard length magnums developed by shortening the .375 H&H Magnum case to approx. 0.195 Bullet Style: BND SPIT Primer: Fed GM215M B.C. It's my preference. Earlier .257 Weatherby Magnum rifles had a twist rate of 1 rotation in 12 in (300 mm), which is too slow to stabilize long for caliber bullet. Comparing the Remington's Premium PRC2506RA ammunition for the 25-06 Remington Weatherby's N257115BST .257 Weatherby bullet when zeroed for 200 yd (180 m) drops less than 30 in (76 cm) while the 25-06 Remington drop slightly over 44 in (110 cm) at 500 yd (460 m). Cartridges available Rimless H & H Magnum case to approx ready to ship at Ammo Freedom the! Slightly heavier bullet driving the 115 grain Ballistic Tip and 117 grain SST out to ranges. Wind work almost perfect and are deadly for a source of ammunition for the brands you trust Hornady. 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