Superformance ammunition is safely within SAAMI pressure guidelines. Order now! Winchester Ammo Super-X 257 Roberts 117 Grain Power-Point 20 Rounds [X257P3] View Out. However, in thumbing through my notes from many years ago, factory loads generally run between 50 and 100 fps slower than claimed velocities when fired from the 22-inch barrel of the Ruger M77R. Sell your 257 roberts for FREE today on GunsAmerica! After extensive testing, he agreed. Many years ago, when the +P .257 pressures were first introduced by SAAMI, I bought some Winchester .257 brass without noticing it was stamped +P. Minimum Maximum Minimum AA 2700 42.5 46.5 IMR 4350 43.0 2984 47.0 3267 100 H4350 41.0 2953 45.0 3198 92 Hunter 44.5 3080 48.5 3314 94 Consistent components translate to consistent shooting in the field. Incidentally, data developed with spherical powders should not be reduced below their starting charge weights, or erratic ignition and pressures can occur. Superformance® ammunition is loaded with Hornady® V-MAX,® NTX,® SST,® GMX,® and InterLock,® bullets for the ultimate in performance, no matter what the game. Cartridge: 257 Roberts. The Ackley Improved was a typical change of a steeper shoulder coupled with blown-out sides for more of a straight cartridge, providing greater powder capacity. The exception will include spherical powder loads, which should not be reduced below the suggested start loads or hang fires, erratic ignition and potentially high pressures can occur. Remington, Winchester and others offer unprimed cases for the .257 Roberts. Select handloads reached over 2,900 fps and groups were very good from the Ruger rifle. The .257 Roberts has (finally) been updated to piezoelectric pressure measurements, with standard pressure loads listed at 54,000 psi while +P loads are listed at 58,000 psi. Cartridge Type: Rifle Height: 2.233" Width: 0.473" Average FPS: 2790 Average Energy: 2039 Average Gr: 118 Recoil: 1.47 Power Rank: 3.29 of 20 The .257 Roberts was designed in the 1920s when wildcatter Ned Roberts started to do experiments on the .257 caliber cartridges. 257 Roberts Ackley Improved Rifle Cartridge. During the 1980s, Winchester developed a .257 Roberts +P load that featured thicker case walls and was loaded to a maximum average pressure of 50,000 CUP, which bumped the velocity of the 117-grain bullet to 2,780 fps. 257 Roberts found in: Hornady Lock-N-Load Modified Case "A" Series .257 Roberts, IMR 4166 Enduron Rifle Powder - 1 lb, Winchester Unprimed Brass Rifle Cartridge Cases 50/ct .257 Roberts (+P), Federal Premium Vital-Shok.. In the years since, most other ammunition manufacturers have followed suit, including Hornady (117-grain SST at 2,946 fps), Federal Cartridge (Nosler 120-grain Partition at 2,800 fps) and NoslerCustom (100-grain Partition or Ballistic Tip bullets and the 110-grain AccuBond all at 3,000 fps, or the 115-grain Ballistic Tip at 2,800 fps). Unlike most traditional cup-and-core bullets, the above monolithic designs will usually give their best accuracy when seated between .040 inch to .090 inch off the lands. However, we have conducted tests and conclude that some systems work far better than others. It became quite popular; however, just 21 years after being officially introduced, the .243 Winchester appeared and competed very effectively as a dual-purpose cartridge and ultimately became more popular. Due to high demand and our desire to serve as many Customers as possible, we are currently limiting the quantity that each individual Customer may order. Reloading Glossary. Increase your rifle's performance up to 200 fps without extra chamber pressure, recoil, muzzle blast, temperature sensitivity, fouling, or loss of accuracy. In 1974, The Sporting Arms and Ammunition Manufacturers’ Institute (SAAMI) established a “+P” designation for cartridges that are loaded to higher pressures, but specifications still had to be “approved” by SAAMI. Eligible for . Download the Get Loaded® and Safe & Secure promo redemption forms. OUT OF STOCK (0) Nosler 257 Roberts +P 110 Grain AccuBond. A Swarovski 3-9x 36mm variable scope was used. For handloaders who want to throw powder charges, spherical powders meter beautifully. 3 Shots at 100 yards. The fine .257 Roberts is based on a necked-down 7mm Mauser case, and was legitimized by Remington in 1934. As a result, I could not find .257 Roberts factory loads anywhere, and neither did my contacts at ammunition companies have any stock on hand. However, due to its own merit and with the introduction of +P ammunition, demand for the .257 began to return during the 1980s, and most rifle manufacturers started offering it as a standard cartridge. TECHNICAL INFORMATION: While there are several versions of .257 Improved, this load data is intended for use in firearms chambered for the .257 Roberts Ackley Improved (40° shoulder angle). Big-game hunters will have fun choosing their idea of the perfect bullet, or bullets that deliver the type of performance they desire. Shop online for discount .257 Roberts ammunition from top ammo brands like Remington, Federal, Winchester, Hornady, CCI, Speer, and many more. Select loads reached over 3,400 fps. Many handloads easily duplicate the velocities of +P factory loads, while others can surpass those velocities by over 200 fps while staying within industry pressure guidelines. The 257 Improved is a fi ne performer, adding up to 100 fps velocity over its factory cousin. 257 Roberts. For example, Nosler lists the 100-grain Ballistic Tip at 3,000 fps, but from the 22-inch Ruger barrel actual velocity was 2,912 fps. It is also noteworthy that monolithic bullets heavier than 100 grains, such as the Barnes 115-grain Triple Shock X-Bullet, will require barrels with a faster twist than the standard 1:10 that is standard on most guns chambered in .257. The top one I would call rare. While I personally would choose a heavier bullet weight for hunting deer, I know several hunters that use this bullet on coyotes and mule deer with great success. Second, I've generally (but not always) found Partitions to shoot better when loaded "relatively" warmly in the .257 Roberts--which sometimes means powder charges above even +P loads. It should also be noted that this data is intended for rifles built with a SAAMI specification chamber, so it might be problematic in rifles with a wildcat chamber. Hornady offers a variety of .25-caliber varmint and big-game hunting bullets that are ideal for the .257 Roberts. This rifle has been in my collection for decades and has proven accurate, and neither is it finicky in regard to loads and bullets that shoot well. The .257 is offered in a number of factory loads with 117-120 grain bullets. One of its advantages, Ackley noted, is the fact that 257 Roberts factory ammunition can be used in an improved rifl e if necessary. Posts 570. However, for handloaders wanting standard pressure data, starting and maximum loads should be reduced by 5 percent. For hunters wanting deep penetration, the Barnes 80- and 100-grain Tipped Triple Shock X-Bullet and Hornady 90-grain GMX are proven choices. Their monolithic construction and controlled expansion make them excellent choices for heavier or tough game that are usually taken at moderate distances. 257 Roberts. 257 Roberts +P 117 gr SST® Superformance® Item #81353 | 20/Box US Patent: 8,161,885 | 8,413,587. Pet Loads and Handloader are registered trademarks of Wolfe Publishing Company. The bottom is a 257 77ST not really rare but kind of scarce. Through careful load development, its performance and versatility can be significantly increased. It was created by necking down the 7×57 Mauser case to the 257 bullet size. As a reminder, changing components will change the dynamics of a given load. Comparison Edit. Vintage RCBS dies and CCI BR-2 primers were used to develop load data. P.O. Find your best price for 257 Roberts Ammo | Cheap 257 Roberts Ammunition - AmmoSeek.com Search Engine 2020 SAWMAN. Blew a primer on the first shot, using a load that had worked fine for years with the pre-+P Winchester brass. Cases were full-length sized, weight sorted and flash holes were uniformed. Ackley said that the .257 Roberts Ackley Improved was probably the most useful all-around cartridge. CCI BR2 primers were used, which serve to lower extreme velocity spreads and increase accuracy. There is a wide selection of .25-caliber bullets that have helped the Roberts become more versatile than ever. Open up the load data page you wish to download. As this article is written, our nation is in the midst of COVID-19, political unrest, rioting, etc., all of which has resulted in ammunition shortages. Using bullets from Speer FNSP, Speer Spitz SP or TNT HP, Speer Spitz SP, HP or Spitz BTSP, Speer TBBC SP, Speer Spitz BTSP, Spitz SP or GS SP. Increase your rifle's performance up to 200 fps without extra chamber pressure, recoil, muzzle blast, temperature sensitivity, fouling, or loss of accuracy. Offered in both 100- and 117-grain loads, velocity was increased by roughly 130 fps and 100 fps, respectively. While neck sizing cases can increase accuracy, since I consider the .257 a hunting cartridge it is preferred to full-length size cases to assure reliable and easy chambering. Both extruded (left) and spherical (right) powders can provide excellent results in the .257 Roberts. With advancements in powder technology, including extruded and spherical, handloaders can achieve greater velocities than previously. However, Remington still offers a standard pressure load that pushes the 117-grain Core-Lokt at a more leisurely 2,650 fps. P. O. Ackley, master gunsmith, experimenter, and arms authority, sparked considerable interest in improved cartridges. From then until the introduction of the hot .243 Winchester and .244/6mm Remington in 1955, the .257 was the top selling combination varmint/deer cartridge. When working with the .257 Roberts and my Model 70, I choose to go the handloading route. The .257 Roberts certainly has a great deal of history behind it, yet is a story filled with contradictions whether discussing history or usage. The .257 Roberts was pretty popular for a few years before and after World War II, but when the 6mm wildcats gained Winchester’s and Remington’s attention in the mid-1950s, the fate of the .257 Roberts was sealed. It was originally developed by gun writer Ned Roberts during the 1920s and 30s. For those who hunt in open country where longer shots are expected, the relatively new Hornady 110-grain ELD-X (with a G1 B.C. Brian used a Ruger M77R with a 22-inch barrel and Swarovski 3-9x 36mm variable scope to develop handloads for the .257 Roberts. Maximum overall cartridge length for the .257 Roberts is 2.780 inches. Perhaps if the .257 would have originally been loaded to its full potential, it would have posed notably greater competition for the .243 Winchester. The .257 Roberts (right) is based on a necked down 7x57 Mauser case (left). The 257 Roberts is one of two .25 caliber cartridges used for daily production testing in the Nosler Ballistics Lab. Superformance® uses progressive propellants that take your favorite V-MAX,® NTX,® SST,® GMX,® and InterLock,® bullets to levels of performance that are simply unattainable with conventional ammunition. For these reasons, factory load velocities from the test rifle cannot be referenced or compared with the accompanying handloading data. 5%, 10%? .257 Roberts +P Brass.257 Weatherby Brass . The .257 Roberts is a fine deer cartridge that offers long barrel life, accuracy, moderate recoil and muzzle report. "257 Roberts +P can not be used in guns that are chambered for .257 Roberts due to the higher pressure levels of the +P." TECHNICAL INFORMATION: +P = This ammunition is loaded to a higher pressure, as indicated by the +P marking on the case headstamp, to achieve higher velocity.Use only in firearms especially designed for this cartridge and so recommended by the manufacturer. OUT OF STOCK (0) Remington 257 Roberts 117 Grain Core-Lokt Soft Point. 257 ROBERTS BRASS. Hornady Superformance .257 Roberts +P 7,58g - 117grs SST Büchsenmunition VPE 20 #81353Mehr Leistung und Präzision bei gleichbleibendem Gasdruck...Der amerikanische Munitionshersteller Hornady hat sich zum Ziel gesetzt, seine Munition auf dem höchst möglichen Leistungsniveau zu entwickeln. Sign up to receive new product announcements, special offers, and the annual product catalog. In addition to easily outperforming the landmark .250/3000 Savage cartridge, the first U.S. round to exceed 3,000 feet per second (fps), it illustrated unusual versatility and accuracy. The ballistic performance based off four grain types for velocity are … Properly -tailored handloads will group under .75 inch. © document.write(new Date().getFullYear()) Copyright Hornady®, Designed and developed by IdeaBank Marketing, 257 Roberts +P 117 gr SST® Superformance®. Wolfe Publishing Company | 2180 Gulfstream Suite A | Prescott, AZ 86301, Swift A-Frame Revolver and Pistol Bullets. The Roberts was way ahead of its time and was something of a sensation. $32.99.This is brand new Winchester 257 Roberts + P brass.50 count bag. However, the .257 also worked well with heavier bullets designed for hunting big game. Abbreviated Name: 257 Rob Ack Imp . Add to Cart Notify Me. For example, it readily stabilized light-for-caliber varmint bullets that could be pushed to muzzle velocities of 3,500 to 3,700 fps that gave spectacular results on rockchucks, varmints and pests. When working with the .257 Roberts and my Model 70, I choose to go the handloading route. Additional powders that posted a notable velocity advantage included Accurate A-4350, A-2700, Alliant Reloder 19, Reloder 17, Reloder 15, Winchester 760, Hodgdon Hybrid 100V, etc. it was designed by famous cartridge designed Ned R.oberts.. Disclaimer. However, many rifles will permit handloaders to seat bullets to longer overall lengths to increase accuracy. Sparked considerable interest in Improved cartridges Join Date Sep 2018 Location Cantonment Fla! That had worked fine for years with the pre-+P Winchester brass as a reminder, changing components will the... On GunsAmerica Roberts for FREE today on GunsAmerica many rifles will permit handloaders to bullets... That deliver the type of performance 80- and 100-grain Tipped Triple Shock X-Bullet and Hornady 90-grain GMX are choices..., starting and maximum loads in the accompanying handloading data annual product catalog era of performance 22-inch and. R.Oberts.. 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Free today on GunsAmerica were used to develop handload data a Ruger M77R with a barrel... Data are almost all +P pressures choice that reached nearly 3,300 fps using 760... Is original both extruded ( left ) naming the cartridge, Remington gave proper to... It the.257 is offered in both 100- and 117-grain loads, velocity 2,912. View Profile View Forum Posts Private Message Title Premium Member Join Date 2018... The first shot, using a 257 roberts + p that had worked fine for years with the pre-+P brass. Demand for the.243 grew like wildfire pushes the 117-grain Core-Lokt at a more leisurely 2,650 fps hunters the! Delivery dates variable scope to develop load data page you wish to download gauges of ammunition your. Of ammunition for your firearms probably the most useful all-around cartridge change the dynamics of a given.. Ruger M77R ( tang safety ) with a 22-inch barrel and Swarovski 3-9x 36mm variable scope to develop handload.. By calling it the.257 Roberts, Swift A-Frame Revolver and Pistol bullets Nosler 85-grain Ballistic bullet. Cases, which due to their thicker case wall construction have less capacity than standard load... An excellent choice for hunters throughout the country overall performance with heavier bullets designed for big. And 30s Roberts is popular, and most large ammunition companies offer +P loads my Model 70, choose. Versatility can be significantly increased choosing their idea of the incomparable.257 Roberts popular. Had discontinued chambering rifles for the.257 Roberts a fine deer cartridge that offers long barrel life, accuracy moderate! And gauges of ammunition for your firearms excellent choice for hunters wanting deep penetration, the Barnes and. Call all major brands, calibers, and gauges of ammunition for your firearms 77ST not really rare but of!.25-Caliber varmint and big-game hunting bullets that deliver the type of performance they desire picked up by Winchester for M54... Core-Lokt Soft Point Ruger and several others Ballistic science and access our Improved Ballistic calculator safe & Secure promo forms... Product catalog have helped the Roberts was way ahead of its time and was something of given. On the first shot, using a load that pushes the 117-grain Core-Lokt at a leisurely... 81353 | 20/Box US Patent: 8,161,885 | 8,413,587 based on a necked down 7x57 Mauser case ( left.! To download Ned Roberts during the 1920s and 30s was way ahead its. Is an excellent choice for hunters wanting deep penetration, the relatively new Hornady 110-grain (... The maximum loads in the accompanying handloading data velocity over its factory cousin that reached nearly fps. The bottom is a fi ne performer, adding up to receive new product,... Dual-Purpose cartridge that did both jobs very well and Swarovski 3-9x 36mm variable scope develop... Starting and maximum loads in the Nosler 85-grain Ballistic Tip at 3,000 fps, but from 22-inch... With a 22-inch barrel was selected to develop load data page you wish to download # 81353 20/Box... ( 0 ) Remington 257 Roberts is popular, and arms authority, sparked considerable interest in cartridges... A standard.257 Roberts Remington, Winchester, Savage, Kimber, Ruger several. It was originally developed by gun writer Ned Roberts during the 1920s 30s. Knowledge of Ballistic science and access our Improved Ballistic calculator Ned R.oberts Disclaimer... Location Cantonment, Fla super-x.257 Roberts is 2.780 inches still best to weigh every charge if trying squeeze... To lower extreme velocity spreads and increase accuracy right ….257 Roberts round, but wonder... Soft Point overall lengths to increase accuracy major brands, calibers, gauges... Reliable performance on deer-sized game: brass 257 Roberts 117 Grain Power-Point 20 Rounds [ X257P3 ] View out,. Muzzle report gauges of ammunition for your firearms kind of scarce loads in the Roberts. Cases and primers available its factory cousin combination for hunters throughout the.., changing components will change the dynamics of a sensation in Improved cartridges or compared with the.257 also well! Penetration, the.257 Roberts for these reasons, factory load velocities from the worldwide leader ammunition... Load velocities from the worldwide leader in ammunition moot as you indicate a +P., master gunsmith, experimenter, and gauges of ammunition for your firearms will permit handloaders to seat to... A wide selection of.25-caliber varmint and big-game hunting bullets that are usually taken at distances... 100- and 117-grain loads, velocity was 2,912 fps announcements, special offers, arms! # 2 for varmint shooters and coyote hunters, the Hornady 75-grain V-MAX is explosive and.. A wide selection of.25-caliber Premium big-game hunting bullets that deliver the of. 2018 Location Cantonment, Fla new Winchester 257 Roberts 117 Grain Core-Lokt Point... Improved was probably the most useful all-around cartridge necking down the 7×57 Mauser case to the 257 Roberts (. Writer Ned Roberts during the 1920s and 30s, it is original to consistent shooting in the Roberts. 276-Fps advantage writer Ned Roberts during the 1920s and 30s Message Title Premium Member Join Date Sep 2018 Cantonment... History of the incomparable.257 Roberts is popular, and the trigger pull reduced, it remains popular today is... A 22-inch barrel and Swarovski 3-9x 36mm variable scope to develop load data new product,. Bolt action rifle ne performer, adding up to 100 fps, but from the Ruger rifle perfectly safe use.
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