The .257 Roberts is one of those cartridges that has a storied history in cartridge development. In the table below I used the term "mid-range trajectory," abbreviated "MRT." A maximum bullet rise of 1.5 inches is Killed a few deer and a mature cow elk (200 yds) with 115 NP's. 80 Barnes TTSX B25780TTSX $99 .316 3870 3561 3274 3005 2753 2514 2661 2253 1904 1605 1346 1123 1.9 2.6 0.0 -6.4 -17.4 M 100 Spitzer G257100SR $44 .256 3500 3091 2718 2375 2057 1766 2721 2122 1641 1253 940 693 3.0 3.9 0.0 -10.1 -28.5 Notes: rifle: Japanese type 38 (rechambered); barrel: 24"; twist: 1-8 3/8; cases: R-P; primer: CCI-200 (except where otherwise specified in remarks); data for 87 grain Spitzer bullet may be used with the 87 grain Hollow Point; this data may be used to load 6.5x57mm Mauser; maximum loads listed should be used with caution (Speer Reloading Manual Number Nine) IMR 4350 is an excellent powder for our hunting weight bullets. *To properly chamber a rifle for .257 Ackley Improved cartridges, a gunsmith must set the original barrel back about 0.004. Other 25 caliber wildcats are not this fl exible. Their ballisticians tested the same powder charge (43.2 grains) using the same bullet (143-grain FMJ) loaded in the 308 Winchester - they used IMR 4350 performance as a reference. If you want to drive a .25 caliber seriously fast, these are definitely among the finest cases with which to do so. 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. Hornady 257 Roberts Ammunition Superformance H81353 117 Grain SST 20 rounds. 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. My Ruger Hawkeye in .257 Roberts has the same 550mm barrel length as Kens .25-284, but is on a long action and long-throated into the bargain. After being developed as a wildcat cartridge, essentially a necked down 757, the 257 Roberts was chambered commercially by Remington in the mid 1930s. The following ammunition cartridge ballistics information and chart can be used to approximately compare .243 Winchester vs .25-06 Remington ammo rounds. 6.5x257 Roberts: Warning! We are your source when you want to do precision reloading. Either the 100 gr. The .257 shoots a 115gr bullet I beleive and most folks shoot an 80gr or so in the .243, so the .257 has a little more meat to the projectile. The 257 Improved is all that the 257 Roberts isand a bit more. Returns Policy. The 6.5-.284 Norma another winner. I built my first .223/.556 last year and now I'm looking to build my favorite bolt gun a Weatherby .257 in an AR platform. I was already considering rebarreling when I found the 131 ACE last week. What is the best barrel length for the 25/06 22, 24, 26. Range Velocity Energy Elevation Windage (y) (fps) (ft-lbs) (inches) (inches) 0 3165 2559 Invented by Roy Weatherby in 1944, it was his favorite cartridge as well. Ballistics Information: Muzzle Velocity: 2945 fps; Muzzle Energy: 2253 ft. lbs. When working with the .257 Roberts and my Model 70, I choose to go the handloading route. Like Like This is where to find all your reloading components: Hulls, wads, reloaders, shot, ammunition and accessories. The handloaded .257 Roberts is a fine dual-purpose varmint- big-game cartridge, not much inferior to the .25-06. Regardless the gauge or type of shot, we have shotshell components to fill your shotgun reloading needs. Someone had finally purchased my 318 Westly. line of sight for all big game loads. Edit & Download Download . Origin of the 257 Roberts. 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 RL 19 45.0 3008 49.0 3275 101 VIT N560 45.5 2953 50.0 3278 100 Ballistics of .257 in an AR platform. Seat the bullet well out into the rifling, so that it makes good contact with the lands when the cartridge is chambered. The .257 is a great round with very minimal recoil, however, the .243 is hard to beat. One of its advantages, Ackley noted, is the fact that 257 Roberts factory ammunition can be used in an improved rifl e if necessary. The .257 Wby. Thread starter Mr.Z; Start date Jan 5, 2014; M. Mr.Z New Member. Gun tinkerer Ned Roberts created this hot little number sometime in the 1920s, and by 1934 Remington saw the light and took it commercial, sticking with the already well known 257 Roberts name. "The number one problem with America is, a whole lot of people need shot, and nobody is shooting them." Re: 257 Roberts or 7-08 for deer #2489541 10/10/08: Joined: Jul 2005. Why? In ballistics catalogs the point of maximum bullet rise is often called the mid-range trajectory, or sometimes the maximum ordinate. Still has light recoil too. For me, the best whitetail cartridge is the .257 Weatherby Magnum. Pretty much .25-06 velocity. Mag. Joined Nov 7, 2007 Messages 1. I read some wild claims from a smith with the last name of Ferguson who supposedly made the first wildcat called the 257 Hot Tamale. M .257 Wby. My first rifle was a 257 Roberts and my second is an old Interarms Mark x 25-06. 257 Roberts Trajectory. There is a legend that the .257 Roberts is lightly loaded because of the wildcat custom guns made for it on pre-'98 Mausers before it was picked up as a factory load. I don't think the .257 Roberts was offered in a Remington slide action until the Model 760 which will hold .270 Win, at the time the hottest non-magnum round on the market. No issues. Our traditional line of bullets feature exposed lead tips for controlled expansion and hard-hitting terminal performance. I consider it to be ideal for ferals and deer. .257 Ackley Improved *Barnes loads were developed using brass fire-formed to fit the Ackley Improved chamber. The 257 Improved is a fi ne performer, adding up to 100 fps velocity over its factory cousin. So Im looking at getting a 257 Roberts or 25/06 I noticed there is a about 100fps difference between them. .257 Roberts *Load data for this cartridge was tested at the standard SAAMI pressure levelnot the higher +P pressure levels listed in some manuals. -Master Chief Hershel Davis. Please note, the following information reflects the estimated average ballistics for each caliber and does not pertain to a particular manufacturer, bullet weight, or 257 Roberts 117 Gr. Shotshell reloading supplies for all of your shotgun reloading needs. Offered in both 100- and 117-grain loads, velocity was increased by roughly 130 fps and 100 fps, respectively. C C. 257 Roberts Ballistics. This means that the momentum of a rifle's reaction will exactly equal the momentum of the bullet and powder gasses ejected from the barrel. I just recently bought a Kimber Montana in .257 Roberts, and look forward to shooting it soon. I'm really only going to shoot 115-120 grain. I think the .243 probably shoots flatter and would be my choice. Back in the 1980s, a press release showed that Winchester still kept an interest in the .257 Roberts by introducing a +P version of the cartridge. 25 Cal .257 117 gr InterLock BTSP Item #2552 | 100/Box . Noted gun and cartridge experimenter Dr. Franklin Mann was indeed a very important part of the .25-caliber concept. Fillable Printable Ammunition Ballistic Chart. To fire-form brass for the .257 Ackley Improved, we suggest the following procedure: Start with a standard .257 Roberts cases; Select a light load of relatively fast powder (IMR4895 is great) from the standard .257 Roberts data. My .257 Roberts is a 24" pre 64 Win with an identical to stock barrel profile, HART barrel in .257 Ackley improved 40. Most have our pioneering secant ogive design one of the most ballistically efficient profiles ever developed (see diagram to right). Seemed like a good deal,23.99 and free shipping (with Prime) for a full sized backpack that can separate into 3 pieces.Was getting ready to hit the "buy" button but decided to go back and read some more reviews where I learned that there were complaints about straps separating and the belt not staying buckled so I decided to pass on it. I noticed most roberts come in 22 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. BT SP InterLock 8135 2780/2007 2550/1688 2331/1411 2122/1170 1925/963 1740/787-1.5 1.9 0-8.4-24.4-49.9. Until the 243 Winchester and 244 Remington appeared in 1955, the 257 Roberts was the dual purpose varmint/deer cartridge of choice across the land. Partition, or the 110 gr. Berger Hunting VLD Trophy Gold Ballistics The Hunting Shack, Inc 406-777-2106 4406 Rathbun Lane www.thehuntingshack.com Stevensville, MT 59870 10/17/2017. Jan 5, 2014 #1 First off I'm new to the whole AR thing. 257 Roberts 115 gr. The .257 Roberts is a honey, perhaps a perfect whitetail round for reloaders who can reload to +P power levels. In my testing, mainly with Lilja 1-10 twist barrels of 28-30" in length, the 257 STW will get you 3800-3825 fps in a 28" pipe and 3875-3900 fps in a full 30" barrel and those are full tilt loads. Ballistics and Drop for the .257 Weatherby Magnum 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. Standard Ballistics Chart; Fillable Printable Ammunition Ballistic Chart. By Chuck Hawks. Im currently setting up a Proof Research barrel and trying to contain my excitement cant wait to see what I can do with the faster twist and high BCs. Ballistic Tip, 100 gr. H81353,H81353BRICK,H81353CASE,H81353X. Nothing wrong with the .260 Rem, or it's AI version. The 257 Roberts is one of two .25 caliber cartridges used for daily production testing in the Nosler Ballistics Lab. If the ballistics are there, well then it's a very sweet round indeed, as is the SWEDE. Hornady 257 Roberts Ammunition Superformance H81353 117 Grain SST 20 rounds. Eurenco Bofors produced the following chart, which we have published in our Norma Reloading Manual. For every action there is an equal and opposite reaction; that is one of the physical laws of our universe. AccuBond would be our pick for deer-sized game. Because it has low recoil and a laser-like trajectory, and it kills quicker than any cartridge has a right to. *To fire-form brass, use the faster-burning powders and loads from standard .257 Roberts data. Posts: 6,064. HORNADY AMMUNITION BALLISTICS V Varmint Express LE LEVERevolution C Custom LM Light Mag HM Heavy Mag T TAP FPD M Match HORNADY PRODUCT LINES Ammo Description Velocity (fps) / Energy (ft/lb) Trajectory Tables CARTRIDGE BULLET ITEM # MUZZLE 100 yds 200 yds 300 yds 400 yds 500 yds MUZZLE 100 yds 200 yds 300 yds 400 yds 500 yds