The .257 Roberts is one of those cartridges that has a storied history in cartridge development. You see, that is the allure of .25 caliber rifle cartridges. An Accidental Endeavor 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. JeffG likes this. It is a very capable cartridge for hunting medium sized Class 2 game when loaded with 115 - … After being developed as a wildcat cartridge, essentially a necked down 7×57, the 257 Roberts was chambered commercially by Remington in the mid 1930s. Ackley said that the .257 Roberts Ackley Improved was probably the most useful all-around cartridge. The .257 was designed to run in a bolt gun, and any receiver that was designed for the 7x57mm Mauser will handle the .257 Roberts perfectly. I own a .257 Weatherby and a .260 Remington. The PowerRank is an estimation of the cartridge power. With light bullets the .257 produces little recoil and has a flat trajectory suitable for varmint hunting. After hand loading for years I wanted to try some factory loads in my Ruger 77 257 Roberts..As it turned out the Hornady SST 117 grain loads would produce 3 1/2 inch groups at 100 yards at best. Created with Sketch. 0.0 indicates yardage at which firearm was sighted in. if I need smaller/lighter/cheaper, I'll shoot 223 (or 22-250 on a lark). The .257-Roberts was a popular wildcat round before the first factory ammunition was standardized in 1934, by Remington as stated. I realize that 7mm-08 or 308 would work but I don’t find those cartridges interesting anymore. Founded by Frank Galli in 2014, Sniper’s Hide has been offering informational videos, podcasts, and other support to it’s users in one location. The .257 Roberts is a low recoiling, mild powered cartridge. The 120 grain Speer and 100 grain Nosler Partition have been two of the more successful hand loading rounds when it comes to acceptable wound penetration on targets. The powders I chose are RL19, H4831, and IMR4350. Be Alert: Publisher cannot be responsible for errors in published load data. rifles, it doesn't […] The output from QuickLoad puts the 75-grain .257 Roberts 1.7in flatter at 400 yards than the equivalent for the .243 Win. Either the 100 gr. .303 British, .444 Marlin, 6.5x57 Mauser, .257 Roberts, 7x57mm Mauser, .220 Swift, 8x57mm Mauser JS, 6mm Remington. The .257 Roberts dates way back to around the 1920's but many still use it to this day. Gunpowder Charge Weight Velocity m/s Velocity fps; Norma MRP: Max 47.6 Min 45.0: 851 808: 2792 2651 After some work he decided to go with a 7x57 Mauser as the parent case and Remington Arms picked up the commercial version in 1934 to sell to the public. The .257 Roberts, also known as .257 Bob,[2] is a medium-powered .25 caliber cartridge. bullets. This is a .243 Ruger M77 with a … Ballistic Tip, 100 gr. Steel Core 223 Ammo For single-use ammo in your .223 Rem. Cartridge Type: RifleHeight: 2.233"Width: 0.473"Average FPS: 2790Average Energy: 2039Average Gr: 118Recoil: 1.47Power Rank: 3.29 of 20. For me, the best whitetail cartridge is the .257 Weatherby Magnum. The latter will do 95% of what the former will, and most shooters can live without that last 5%. At the time there were many older actions available of questionable strength. 257 roberts: 28335: 117: ... specifications are nominal ballistics figures established in test barrels. 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). IMR 4350 is an excellent powder for our hunting weight bullets. *To fire-form brass, use the faster-burning powders and loads from standard .257 Roberts data. The other prominent version is the .257 RCBS Improved, which features a 28° shoulder. 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). Increase your rifle's performance up to 200 fps without extra chamber pressure, recoil, muzzle blast, temperature sensitivity, fouling, or loss of accuracy. The original factory load for this is very similar to the .250-3000 Savage. With a modern action and handloading, this cartridge is capable of markedly improved performance. Created with Sketch. P.O. I’d like to hear from some guys who can tell me real world velocities from both .25 creedmoor and .257 Roberts AI using 100-110 gr. The three highest velocities listed for 100-gr bullet are: 6mm Rem: 3140, 3142, 3137 257 Robts: 3205, 3134, 3108 These are statistically indistinguishable. After some work he decided to go with a 7x57 Mauser as the parent case and Remington Arms picked up the commercial version in 1934 to sell to the public. † for use in all rifles chamered in … The .260 Rem and 6.5x55 are basically ballistic twins, although the .260 does come in a S/A, if that's what you like. I picked the 257 Roberts - 75gr HP for smaller/lighter game and range use, and 115gr-120gr for bigger stuff. However, the 257 Roberts pressures are limited to 47,800 CUP, while the 6mm Rem reaches 62,600 PSI. * test barrel length in inches. 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. The .257 Roberts factory loads are available on the commercial market inside the U.S. by manufacturers such as Olin, Hornady, and Federal. 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. Why? *To properly chamber a rifle for .257 Ackley Improved cartridges, a gunsmith must set the original barrel back about 0.004”. 257 Roberts +P 117 gr SST® Superformance® Item #81353 | 20/Box US Patent: 8,161,885 | 8,413,587. Partition, or the 110 gr. .257 Roberts Centerfire Rifle Ammo (6 Products) Filter By . Gun Fight Friday: .257 vs .243 Designed in 1968, the Ruger M77 is heavy-duty and rugged gun. Reader Submitted. It has been described as the best compromise between the low recoil and flat trajectory of smaller calibers such as the .22 and 6mm, and the strong energy but not the strong recoil of larger popular hunting calibers, such as the 7mm family and the popular .30-06. Buy all 5 boxes for $175 and I'll cover shipping. My 257 Roberts in FN Browning of 1953 vintage with Herder's Chery wood stock is wicked with a 75g BTHP on ground hogs with the Leopold 7.5 x 50mm with parallax adj mounted on top. It has been described as the best compromise between the low recoil and flat trajectory of smaller calibers such as the .22 and 6mm, and the higher energy but harder recoil of larger popular hunting calibers, such as the 7mm family and the popular .30-06. Data for muzzle velocity and muzzle energy is for a 24" barrel, except .250-3000 Savage which is for a 22" barrel and .257 Weatherby Magnum which is for a 26" barrel. These are stored at the house of the estate manager until spoken for. Even the 117-grain bullet in the Roberts has 1.6in on the 100-grain .243 at the same range, only losing an inch to the 115-grain .270 Win. The fine .257 Roberts is based on a necked-down 7mm Mauser case, and was legitimized by Remington in 1934. *Casing image above is an artist rendering and not a real photo of .257 Roberts Ballistics cartridge. 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. The other prominent version is the .257 RCBS Improved, which features a 28° shoulder. Sort By: 6 Item(s) Show. It makes a great LR varmint round with the 90-grain TNT or the 95-grain V-MAX, and the 140s will do things no .257 Roberts will ever do..[/color] Co. 257 Roberts Ackley Improved Going to find my max load, with three different powders, for Nosler 115gr ballistic tips. These are leftovers from an estate sale. Unlike the 6.5 caliber cartridges, .25s can handle lightweight 70-gain bullets for varmints. The modified Roberts cases are sometimes known as 6.5×.257 Roberts, although the case headstamp may still indicate .257 Roberts. 257 Roberts Trajectory. For sale are 5 boxes of Hornady 257 Roberts +P 117 gr SST ammunition. The .257 is the original dual purpose caliber. Many cartridge designers in the 1920s were creating various .25 caliber cartridges. I appreciate that range of weights and uses. Japanese Type 38 Arisaka rifles brought to the United States as wartime souvenirs were sometimes converted by rechambering to utilize more readily available .257 Roberts cartridge cases because commercially produced 6.5×50mm Arisaka cartridges were scarce prior to distribution by Norma Projektilfabrik A/S. Rifle is an FN supreme with 24” ER Shaw barrel. After the introduction of the .243 Winchester the .257 Roberts moved even further back on the market. If you want to drive a .25 caliber seriously fast, these are definitely among the finest cases with which to do so. The .257 Roberts uses the same caliber bullets as .250 Savage or the more powerfull .25-06 Remington. Oh and .257 Roberts was making a huge comeback in the '70s and early '80s. With heavier bullets it is capable of taking all but the largest North American game animals. Because it has low recoil and a laser-like trajectory, and it kills quicker than any cartridge has a right to. Hornady Superformance .257 Roberts ammo with 117 grain SST bullet. It has been described as the best compromise between the low recoil and flat trajectory of smaller calibers such as the .22 and 6mm, and the higher energy but harder recoil of larger popular hunting calibers, such as the 7mm family and the popular .30-06.[3]. The neck of the Roberts case would be slightly enlarged to accept handloaded 6.5 mm bullets. Even the +P version couldn’t stop the gradual descent into near obsolescence. The 6.5x55 in the CZ 550 is a great rifle, and the single set trigger is the icing on top! per page . I get the feeling that published data for the Roberts … The .257 Roberts, also known as .257 Bob, is a medium-powered .25 caliber cartridge. The .257 Roberts cartridge does not deserve to be shoved into obscurity. individual firearm may vary from test barrel results. The 257 Roberts is one of two .25 caliber cartridges used for daily production testing in the Nosler Ballistics Lab. ... Sniper’s Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. Origin of the 257 Roberts. From its introduction until the appearance of 6 mm cartridges such as .243 Winchester and 6mm Remington, it was a very popular general purpose cartridge. The ballistic performance based off four grain types for velocity are 3,563 ft/s (75 gr), … The .257 Roberts was designed in the 1920s when wildcatter Ned Roberts started to do experiments on the .257 caliber cartridges. The advantage the .257 Roberts gives to hunters is a reduced recoil compared to other rounds for people who have sensitive shoulders that cannot take the higher recoil from other cartridges. [9] 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. .257 Roberts-Federal Nosler Partition, .257 Roberts-Hornady SST LM Interlock, .257 Roberts-Hornady BTSP Interlock, .257 Roberts-Winchester Power Point + P, .257 Roberts-Remington Soft Point Core-Lokt. My dad got it used from Fred Baker a famous big game hunter, for $100 that he really didn't have to spare in 1957, to say the least. If I need bigger, I'll shoot 308 or 30-06. . 613-372-2662 Noted gun and cartridge experimenter – Dr. Franklin Mann – was indeed a very important part of the .25-caliber concept. The .25s have been American favorites for over a century, dating back to the .25-35 and .25-20 Winchester cartridges; by the time the .250-3000 Savage and .257 Roberts hit the scene, hunters were totally hooked. Norma 20166042 257 Roberts 100 SP - 20rd Box. The first number is the value of this cartridge, and the last number is the value of the most powerful round in our bullet database. Toggle menu. © Copyright GunData.org 2015  |  Koenig Media, LLC   |   Links   |   Sitemap   |   Advertise. Ned Roberts is usually credited with being the designer for this cartridge idea. AccuBond would be our pick for deer-sized game. 257 Roberts Load Data Using Hornady reloading data with the 257 Roberts bullets creates a great round that is popular with hunters who like its low recoil rates. The .257 Roberts failed to gain any traction after the initial introduction of the 117 grain round into the market because the .250 Savage was considered to have better velocity. Illustration courtesy of Hornady Mfg. Get the .260. Conversion of war-souvenir Japanese Arisaka rifles, Learn how and when to remove this template message, "Accurate Powder Reloading Data Guide, 5th ed", https://www.americanrifleman.org/articles/2013/7/19/a-classic-returns-in-257-bob/, The .257 Roberts (.257 Roberts +P) by Chuck Hawks, "SAAMI Velocity & Pressure Data: Centerfire Rifle", "Nosler Reloading Guide 7, 250-3000 Savage", "Nosler Reloading Guide 7, 257 Roberts Ackley Improved", .257 Roberts (257 Roberts +P) at The Reload Bench, https://en.wikipedia.org/w/index.php?title=.257_Roberts&oldid=1001000420, Articles needing additional references from August 2015, All articles needing additional references, Creative Commons Attribution-ShareAlike License, .257 Roberts (+P), .257 Roberts Ackley Improved, This page was last edited on 17 January 2021, at 19:39. [6] Neither unmodified .257 Roberts ammunition nor the original 6.5×50mm Arisaka ammunition are suitable for firing in rechambered Arisaka rifles.[7]. The bore diameter of the .257 Roberts is .257 inches (6.5 mm , not to be confused with the more well known 6.5 caliber (6.5 Grendel, 6.5 Creedmoor) which uses 6.7 mm/.264" bullets or the .25 ACP pistol caliber which is .251 inches (6.35mm). I was vey disappointed as this was off a bench rest under ideal conditions. Remington brass, Winchester primers, bullets are .006” off the lands. The .257 Roberts is a very fine cartridge and carries a lot of respect as a fine old classic. 257 Roberts Ballistics. Due to the availability of inexpensive Mauser actions the 7×57mm Mauser case was a common choice, having near ideal volume capacity for the "quarter-bore" using powders available at that time. .225 Winchester, 7.62x39mm Russian, .243 Winchester Super Short Magnum (WSSM), .25 Winchester Super Short Magnum (WSSM), .44 Smith & Wesson Special, .308 Winchester (7.62mm NATO), .224 Weatherby Magnum, .41 Remington Magnum, 7mm Remington Ultra Magnum, 7x64mm Brenneke, .38 Short Colt, .357 Magnum (Rifle Data), .38 Smith & Wesson, .260 Remington, 7.21mm (.284) Lazzeroni Firebird. Hand loading brass has been more effective increasing velocity on rounds and can be purchased from Hornady, Sierra, and Federal. The .257 Roberts is a medium-powered .25 caliber cartridge. [4], One of the common improvements is called the .257 Roberts(+P) which has a SAAMI maximum pressure limit of 58,000 PSI compared to the 54,000 PSI listed for the standard .257 Roberts.[8]. Remington introduced the commercial version of this popular wildcat as a low-pressure round. By Gary Zinn. Consider Hodgdon's data, both from 24" barrel, for 6mm Rem and 257 Roberts. Bullet Caliber Descriptions .2 57 Roberts. Invented by Roy Weatherby in 1944, it was his favorite cartridge as well. Asking $35/box + shipping. Red Oak, White, or Chestnut for Deer Herd? The ballistic performance based off four grain types for velocity are 3,563 ft/s (75 gr), 3,368 ft/s (90 gr), 3,108 ft/s (100 gr), and 2,777 ft/s (115 gr). .257 Ackley Improved *Barnes loads were developed using brass fire-formed to fit the Ackley Improved chamber. Eventually in 1934 Remington Arms chose to introduce their own commercial version of such a cartridge, and although it wasn't the exact dimensions of the wildcat made by Roberts, they called it the .257 Roberts.[4]. The factory load 100 grain bullets can produce reasonably fast kills on medium sized game on targets up to 150 yards, but is better suited for medium sized game at 100 yards. rbernie, Oct 10, 2018 #21. [5] Today, although surpassed in popularity by other cartridges, it lives on with bolt-action rifles being available from some major manufacturers. In a short action, it has the potential for a suitable youth rifle but without care towards optimizing hand loads, can lack the power with many 117 to 120 grain loads to be of any great advantage over the more common .243. The .257 is offered in a number of factory loads with 117-120 grain bullets. How to Sight in a Scope - Step by Step Guide.

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