You must anneal the case neck/shoulder to ensure maximum case life. 00. The .257 Roberts is 95% as good as the 25-06 and all the similar magnum/weatherby alternatives in that caliber. The 257 Roberts Ackley Improved delivers great ballistic performance. The history of the.257 Roberts dates back to the 1920's, when a wildcatter by the name of Ned Roberts began to experiment with the.257” caliber. Hornady 046275 Full Length Die, 257 Roberts (.257") $25.25 $ 25. Just got a 257 Roberts to go shooting with. Redding Reloading Deluxe Die Set - 257 Roberts Improved 40, 84322. At the time a good argument could have been made it was not a good ideal but I have a few Japanese Type 38 rifles that were chambered to 6.5mm50. swift 4x31 scope . 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. And I said I cut the 6.5mm50 chamber to 6.5mm 257 Roberts. 6.5mm Bullberry learn more 6.5mm BB Imp. The primer pockets got lose. FULL BOX OF VINTAGE 257 ROBERTS AMMO - .257 Roberts BuyItNow! A few issues back, two Shooting Times readers expressed interest in reading about wildcat cartridges and the adventurous experimenters who created them. Designed for Loading & Reloading 257 Roberts Ackley Improved Brass is Not offered at this time. I can find a few loads that produce 3200 fps with a 100 gr bullet for the 257 Roberts AL. Ackley, the modified 257 Roberts was likely the best improved round compared with the couple dozen or so factory cartridges he’d experimented with Ackley’s signature case modifications included reducing the body taper and increasing the shoulder angle—both significantly! Many hunting and reloading articles fondly referred to Ned Roberts’s wildcat as the “.257 Bob.”. But the brass did not last long. Soyez le premier à donner votre avis sur ce produit. .257 Roberts Ackley Improved: Warning! Find 257 Roberts Ammo for sale, in-stock and ready to ship at Ammo Freedom. 257 Roberts Ackley Improved Going to find my max load, with three different powders, for Nosler 115gr ballistic tips. The bolt is a po .257 Ackley Improved SOLD Ballistic Tip, 100 gr. The .25 WSM may soon become a factory load, and the .257 Improved should have been standardized years ago. Lyman BULLET MOULD - .25 … My case loss during the fire-forming process runs about 30%, after reloading the formed cases, the loss still runs about 10%. I have a .25-06 but have never taken any game with it. 257 ACKLEY IMPROVED. 257 Roberts Ackley Improved Load Data. I was pleased with the ballistics, and I lost only one case. Pistol; Rifle; Cowboy; GR. 22 Nosler. Load Data 257 Roberts Ackley Improved Load Data. GA Sales: 133. The other prominent version is the .257 RCBS Improved, which features a 28° shoulder. GunBlue examines the history of the incomparable .257 Roberts. While thinning out my firearms inventory, I realized I could convert my Ruger Hawkeye bolt-action rifle chambered for .257 Roberts to .257 AI. The ".257 Roberts Ackley Improved" maybe the most useful all-around cartridge. 17 Rem Fireball. The 257 Roberts is one of two .25 caliber cartridges used for daily production testing in the Nosler Ballistics Lab. Thread Tools. JeffreyDeGraff. The other prominent version is the.257 RCBS Improved, which features a 28° shoulder. I soon discovered that a number of 6.5mm Jap rifles had been rechambered in .257 Roberts. .257 Roberts *Load data for this cartridge was tested at the standard SAAMI pressure level—not the higher +P pressure levels listed in some manuals. The receiver is a matching gloss blue. AccuBond would be our pick for deer-sized game. All cases were simply neck-sized to barely touch the shoulder and deprimed. When Remington decided to adopt it as a factory cartridge in 1934, the company made a few minor dimensional changes to preclude firing factory ammo in rifles chambered for the wildcat round. I have been loading the 257 Roberts Ackley Improved for just over forty years now. $303.00 $ 303. No Reserve. GA Sales: 133. Basically, all we did was open the 257 Roberts case neck to take a 264 caliber bullet, and gave it an Ackley Improved look. 1 Image(s) Ruger No. 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. My Account My Orders My Address Book My Password. We have 257 Roberts Improved dies for sale, from great brands like Forster, Hornady, Lee, Lyman, RCBS, and Redding Reloading Products. 6.5mm Caliber – 1:8 or 1:9 twist 6.5mm TCU. 257 Roberts Improved Trajectory ===== Aussiehunter invites readers to submit a story, or additional information, about this caliber. I got them sets of dies. Winchester introduced a +P version with a MAP of 58,000 psi in the mid-1980s. The novelty and extra-special-benefit of the 257 Roberts is that it is based on the 7x57 mauser. Model: No. 17 Rem. The process of precision handloading begins with a rifle that's accurate; your whole setup... Give a Gift   In 2012 I built a 257 Roberts Ackley Improved rimmed on a Uberti clone of a Win 1885 falling block action with a Shilen barrel. Ammo Freedom. 25 - 06 Improved. Amazon.com: 257 roberts dies. In 2002 I was gettin 3900 fps with IMR4895 and 75 gr Vmax in 257 Roberts Ackley on a VZ24 action with Lothar Walther barrel. After firing factory .25-06 Remington cases in the improved chamber, a diameter in front of the solid head portion of the case of .472 inch was noted. $13.23 shipping. .257 Ackley Improved Mauser Sporter Description: ... Rifle Caliber:.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 Rédigez votre propre avis. The 257 Improved is all that the 257 Roberts is—and a bit more. For examples of what is required, look at the 223 Remington page. Between the .257 Imp and .25-06 there might be your 100 fps difference. I embarked on my .257 AI project almost by accident. I form 257 Roberts from 30/06 cases. Case Trim Length C.O.L. Type S Neck Bushing Die 257 Roberts … No Reserve. $303.00 $ 303. All loads in Winchester Super Speed cases, overall length was 3.015 inches. This is a very nice custom Mauser sporting rifle in.257 Ackley Improved. 257 Roberts Ackley Improved Rifle Cartridge. Rifle Cartridges. 22 Caliber.224” Diameter. Description: This is a very nice custom Mauser sporting rifle in .257 Ackley Improved. Joined Aug 14, 2019 Messages 1,204 To get started, click the link below to visit mymagnow.com and learn how to access your digital magazine. 257 Roberts cases cost be $8.00 for 100; that is 8¢ each. Bullet Type Primer. 25 - 06. Thread: 257 Roberts Ackley Improved. This address will not be sold or used for promotional purposes. 257 P. The rifle has a 24 inch gloss blue barrel that is as new looking. 22 PPC-USA. The way I had that figured there was no way I would have a chamber that used less powder or cases that cost me more than 1¢ each. 25 - 284. It is a great, low recoil, smooth option. Mauser ~ Custom Mauser ~ .257 Ackley Improved. I’ve owned a dozen or more rifles chambered in that cartridge. 6.5 ROBERTS IMPROVED. $36.00: 0 $36.00 $40.00: 2d 15h 32m 17089769. Subscriber Services. 257 Roberts improved. ALL 75 gr 85 gr 90 gr 100 gr 115 gr 120 gr. I built up 4 rifles on 98 Mauser actions, one for myself, and 3 for the guys I hunt with. Hornady Superformance .257 Roberts ammo with 117 grain SST bullet. However, the .280 Remington is capable of developing energy nearly equal to the .30-06 Springfield, but with lighter bullets having a better ballistic coefficient. All Shooting Times subscribers now have digital access to their magazine content. .257 ROBERTS ACKLEY IMPROVED - Manufacturer Loading Data. Bulk Ammunition on sale, including 257 Roberts Rifle Rounds. swift 4x31 scope . AccuBond would be our pick for deer-sized game. *The.257 Ackley Improved is a wildcat cartridge, so there is no SAAMI spec for maximum overall cartridge length (COAL). Avis des clients. 00. There is a 3% charge on all credit and debit cards.) The only stampings on the rifle are P.O. Mag. The Remington part of the moniker was eventually dropped. FREE Shipping. Thompson Center Encore Pistol 257 Roberts Ackley Improved.this is one of the best deals with firearms ive had to date! Additional charges for Non Free Shipping products, products shipping to remote locations, HazMat products, and large or heavy items still apply. You would think that the .257" bullet would be a tight squeeze in a barrel made for … This holds the case head against the bolt face and eliminates case stretching in the web area, a cause of case head separation. Full Details. Basically, all we did was open the 257 Roberts case neck to take a 264 caliber bullet, and gave it an Ackley Improved look. Since then I have shot the correct ammo through it and it does good, it will hit the 200 meter NRA rams every time from the rest. Powder ALL Accurate 2700 Accurate 4350. The allure of the .257 Roberts hit me early and lasted long. Normally I would not care much, but I had to form that brass with cream of wheat: See, the 257 Roberts is the 7mm Mauser necked down to take a 25 caliber bullet, and the 25-06 is the 30-06 necked down to take a 25 caliber bullet. They are quite similar except for the shoulder angle, which is 40 degrees for the Ackley version and 28 degrees for the RCBS version. Account & Lists ... Redding Reloading Deluxe Die Set - 257 Roberts Improved 40, 84322. Ackley has a couple listed in his book published in 1962. 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. Later, when I measured water capacities of a standard .257 Roberts case and several fireformed AI cases, the difference was about 13 percent (60 grains compared to 53 grains of water). Signed in accounts do not need to verify with captcha . Ackley said that the.257 Roberts Ackley Improved was probably the most useful all-around cartridge. 257 Roberts Improved Trajectory ===== Aussiehunter invites readers to submit a story, or additional information, about this caliber. The .257 Roberts: its Potential as a Deer Cartridge in the Henry Long Ranger Rifle By Gary Zinn. 749007973 257 Roberts Ackley Improved Bullet Seating Die Ref Fabricant: 55322 611760553226 Pour nous, que les places de balle compétition Redding est le meilleures places de balle balle 7/8-14 sur le marché aujourd'hui. It also means you can easily fireform .257 Roberts factory brass or loaded rounds to achieve the .257 AI case shape, so you don’t need expensive forming dies or go through extensive case-forming steps. All cases are Remington and … Tom Beckstrand and Neal Emery of Hornady highlight the 6MM Creedmoor ammo. Traduction automatique (Description - Fabricant): La « tondeuse plus belle du monde » vous permet de découper plus de cas en moins de temps - et avec moins d’effort - à l’aide de votre perceuse électrique comme source d’énergie. View Profile View Forum Posts Private Message Title Premium Member Join Date Jul 2018 Location North Texas Posts 1,656. .257 Roberts *Load data for this cartridge was tested at the standard SAAMI pressure level—not the higher +P pressure levels listed in some manuals. No Reserve. Plan on using it on varmints and up to whitetail and pronghorn size animals. Ackley IMP. Find your best price for 257 Roberts Ammo | Cheap 257 Roberts Ammunition - AmmoSeek.com Search Engine 2020 Questions sur CH4D Jeux d'Outils 257 Roberts Improved 24o. Ballistic Tip, 100 gr. Hornady 046275 Full Length Die, 257 Roberts (.257") $25.25 $ 25. Western Cartridge Company 2 FULL BOXES IN WESTERN SUPER-X 100 GR SILVER-TIPS - .257 Roberts $100.00: 0 $100.00 3d 8h 39m 14648350. Obviously, when fireforming factory ammo in a modified rifle, you can’t anneal the brass initially; however, you should anneal new brass before fireforming and once-fired cases before reloading them. Log In Register. P.O. Apr 1, 2020 #13 44hunter45 Well-known member. Select a light load of relatively fast powder (IMR4895 is great) from the standard .257 Roberts data. Like many .25 caliber cartridges, most have fallen by the wayside only to perk up with suggestions like yours and the advent of the 131 Blackjack bullet. 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). Remington paid homage to the inventor by naming the new factory round the .257 Remington Roberts. The barrels were really too heavy for deer hunting, but we tried. 107 SW Columbia St | Bend, Oregon, USA 97702  |  Toll Free: 1-800-285-3701  |  catalog@nosler.comNosler Showroom / Open to the Public:  Monday - Friday 10:00 am to 5:30 pm PSTCorporate Hours:  Monday - Friday 8:00 am to 4:30 pm PST, Copyright 2013 - 2020Nosler Inc  |  Privacy  Use  Order Processing, Nosler - Bullets, Brass, Ammunition & Rifles. Ackley, the modified 257 Roberts was likely the best improved round compared with the couple dozen or so factory cartridges he’d experimented with Ackley’s signature case modifications included reducing the body taper and increasing the shoulder angle—both significantly! $36.00: 0 $36.00 $40.00: 2d 15h 32m 17089769. 257 Roberts Improved Ballistics. Posez votre Question. 22-250 Rem Ack Imp. Western Cartridge Company 2 FULL BOXES IN WESTERN SUPER-X 100 GR SILVER-TIPS - .257 Roberts $100.00: 0 $100.00 3d 8h 39m 14648350. Hi Josh, the .257 Ackley Improved is a .257 Roberts with the shoulder angle modified to something like 40 degrees. Using Ramshot Enforcer and 230-grain bullets, .45 ACP muzzle velocities over 1,000 FPS at... Keith Feeley of Tactical Solutions sat down with Michael Bane at SHOT Show 2018 to talk about the new X-Ring Takedown SBR .22LR rifle. 250 Gibbs. The .257 Roberts, also known as .257 Bob, is a medium-powered .25 caliber cartridge.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. I got a 257 Roberts Ackley Improved reamer and 4 CM Lothar Walther light varmint barrels from Brownells in 2002. Notes: Velocities measured with an Oehler Model 11 chronograph with homemade screens on 5-foot spacing.Velocities instrumental at 8 feet. I would like to receive news and updates from Guns International. Illustration courtesy of Hornady Mfg. $13.23 shipping. The two most popular "Improved" .257 Roberts cartridges are the Ackley and RCBS versions. All you need to do is take a Mauser and rebarrel it and you have a correctly feeding 257 roberts. Like many .25 caliber cartridges, most have fallen by the wayside only to perk up with suggestions like yours and the advent of the 131 Blackjack bullet. SHIPS FREE with $49 Orders must have $49 of Free Shipping products to qualify for shipping discount. New bullet designs, except for the … The most prominent wildcats are the .257 Roberts Improved and the .25 WSM. The following data was developed in a rifle based on a HALL action. They were the most accurate rifles we had ever owned. The .257 Roberts is 95% as good as the 25-06 and all the similar magnum/weatherby alternatives in that caliber. $29.00: 0 $29.00 Either the 100 gr. Ray B is on the money about forming the cases. We chose COALs that allowed us to maximize case capacity. Skip to main content.us. Russ nFC. They are quite similar except for the shoulder angle, which is 40 degrees for the Ackley version and 28 degrees for the RCBS version. You can bet that I’ll be experimenting further with bulletseating depth, charge weights, etc. The .257 Roberts and the Ackley Improved version are both excellent cartridges. The only stampings on the rifle are P.O. Coincidentally, I had just embarked on my most recent handloading project with the interesting .257 Roberts Ackley Improved wildcat. I followed Nosler’s instructions shown in its No. I want to make readers aware of one special step that’s required when handloading the .257 AI. Hello Select your address All Hello, Sign in. .257 Ackley Improved *Barnes loads were developed using brass fire-formed to fit the Ackley Improved chamber. 257 Roberts Improved Ballistics. .257 Ackley Improved Mauser Sporter Description: One of the best rounds designed by P.O. 25. All cases are Remington and … It's just that their heydays were 50 - 60 years ago and some fanfare before that about the '20s and 1934 for Remington. Bullet seating was done with a .257 Roberts seating die. Full Details. It has been suggested that Charles Newton persuaded Roberts to settle on the 7x57 case design and that close friend Col. Townsend Whelen suggested a … The following data was developed in a Ruger 77 rifle. Seller: ray sophy ray sophy. 6.5mm50 cases may not have been expensive but they were not easy to find. 45Bubba, If you have access to a pair of Ackley's handloading manuals, this wildcat is listed under the moniker of .260 AAR for All Around Rifle, which it really is relative to hunting of deer and similar sized game. After fire-forming, follow load data for the .257 Roberts Ackley Improved. The receiver is a matching gloss blue. "Match" 257 Roberts Improved. The two most popular "Improved".257 Roberts cartridges are the Ackley and RCBS versions. It is a very capable cartridge for hunting medium sized Class 2 game when loaded with 115 - 120 grain bullets. Anyone have experience fireforming brass for the Ackley 257 Roberts Improved cases. 257 Roberts Ackley Improved Trimmer. 12 September 2003, 16:55. The 257 Roberts is an exception to that rule. The Remington Model 700 PCR is a long-range rig built for punching paper, ringing steel, and... A unique load for the .450 Bushmaster is Hornady's new Subsonic offering. Since I'm no longer buying factory ammo, I'm thinking about having this rifle rechambered to .257 Roberts Ackley Improved, and I am wondering if folks have advice on how I … Nom (affiché sur le site)* Email (pas affiché sur le site)* La visibilité . 22 Hornet. Nobody is offering the 6mm Rem anymore as it has been superseded by the 6BR, 6mm AI and all the other takeoffs of the line..257 Roberts and the 6MM are niche calibers and getting rare. Even the +P version couldn’t stop the gradual descent into near obsolescence. 22-250 Rem . The .25-06 which holds another 8 or 9 grains of powder outperforms the .257 Ackley by about 200fps. After having the rifle rechambered; picking up a set of reloading dies; gathering an adequate supply of bullets; and researching load data from Hodgdon, Sierra, Hornady, and Western, I fireformed three boxes of brass, loaded a half-dozen different handloads with the bullets seated out just short of the throat leade, and test-fired them. IMR 4350 is an excellent powder for our hunting weight bullets. Of course, you could have your rifle rechambered for the .25-06 Ackley which treads close on the heels of the .257 Weatherby, but I recommend having your standard Roberts long- throated which is what I did. It originally had a 243 barrel that was thoroughly shot out. 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. And then there is the cost of the forming die; before I spend $86.00 for 100 cases and spend the rest of my … Next, we pit subsonic rivals against each other before stretching the legs of this CQB round out to 600 yards from a short 9-inch barrel. Energy increases were nothing to brag about. Either the 100 gr. That’s still less than the typical 60,000 to 65,000 psi of comparable modern rifle cartridges. Contact Seller *Your Name: *Your Email: *Your Phone Number: *Message: Yes! *To properly chamber a rifle for .257 Ackley Improved cartridges, a gunsmith must set the original barrel back about 0.004”. 222 Rem Mag. Tried beefing up the standard factory Roberts loads and it did help cases life, but case separation still occurs. Ackley said that the .257 Roberts Ackley Improved was probably the most useful all-around cartridge. That is why I own a Rem 788 in 6MM and a Ruger 77 in .257 Bob. Most loads are averages of four shots. (Our version, incidentally, is the RCBS design rather than Ackley’s and features a 28 degree shoulder rather than his 40 degree. Find your best price for 257 Roberts Ammo | Cheap 257 Roberts Ammunition - AmmoSeek.com Search Engine 2020 The .257 Roberts cartridge does not deserve to be shoved into obscurity. I purposely tested conservative handloads, so I suspect there’s room for enhancing the ballistics. Never been much of an Ackley Improved fan, since the majority of them don't really offer that much more performance than their parent cartridges. Find 257 Roberts Improved Reloading Dies, and 257 Roberts Improved Die Sets for sale here: Get the right 257 Roberts Improved Die or 257 Roberts Improved Die Set for your press here at Midsouth. No Reserve. Dies - CH Armory - .257 Wby. To fire-form brass for the .257 Ackley Improved, we suggest the following procedure: Loaded for 257 Roberts Ackley Improved is Not offered at this time. The .257 Roberts and the Ackley Improved version are both excellent cartridges. Seller: ray sophy ray sophy. 204 Ruger. That has me thinking about the other rifles in my safe, especially a Kimber 84 in .257 Roberts. The current SAAMI spec for the .257 Roberts Maximum Average Pressure (MAP) is 54,000 psi. No Reserve. Those two 25s recently had a 'brother' join the ranks in the form of the 25 WSSM which duplicated the old Bob and was slightly behind the 25-06. The problem was, I never had one I really liked. Seat the bullet well out into the rifling, so that it makes good contact with the lands when the cartridge is chambered. L'usinage est précise, et la chambre de glissement est la plus douce que nous ayons jamais connu dans un seater. Redding Type S Match Bushing 3-Die Neck Sizer Set 257 Roberts. I shot 4 deer with it in 2012. Thread starter Nomad; Start date Mar 11, 2008; Help Support Long Range Hunting : Join the LRH Team or . 20 Nosler. We put a Shilen stainless steel # 4 barrel on it, finished at 24 1/5 inches. Ackley IMP. Gun #: 967481281. Loading information is similar but approach maximum loads with care.) 25. Show Printable Version; 02-13-2019, 04:26 PM #1. We glass bedded the action in the original factory stock, and free floated the barrel. The .300 Blackout is here to stay, and we take some time to look at new technology surrounding this cartridge. 8 reloading manual and achieved excellent results. According to P.O. Rifle is an FN supreme with 24” … However, an even more important feature of the typical Ackley Improved (AI) wildcat is that he maintained the shoulder headspace datum of the parent factory round. Noted gun and cartridge experimenter – Dr. Franklin Mann – was indeed a very important part of the .25-caliber concept. IMR 4350 is an excellent powder for our hunting weight bullets. Frank and Tony from Gallery of Guns spice up the Glock test using their non-dominant hands. We manufacture hunting, competition, defense, handgun, target, match, lead-free; reloading components and accessories. All you need to do is take a Mauser and rebarrel it and you have a correctly feeding 257 roberts. Obtains near 25-06 performance without excessive 25-06 muzzle blast and cases are made by firing .257 factory ammunition in the improved chamber. I have form/trim dies. This allows standard.257 Roberts ammunition to be safely fired in.257 Roberts Improved chambers. Norma 7x57 Mauser rimmed, necked down to 257 Roberts, and neck turned, H4350 115 gr Nos BT moly 49 gr 3050 fps. Mar 11, 2008 #1 N. Nomad Well-Known Member. Home; My Account. 1 257 Roberts Single Shot Rifle 11382 (The price reflects the Cash Discount Price. I have been leaning toward the .270 Winchester because there are more bullet weights available for it. The.257 Roberts a medium powered.25 caliber cartridge known affectionately as the Bob. 17 Caliber.172” Diameter. "Match" 6.5mm Bullberry Improved. Plus, the primer pockets are still tight after at least three firings. Ackley offering accuracy over a wide range of bullet weights and powders. It has a long action, which would allow me to lengthen the chamber throat/leade so heavy-for-caliber bullets could be seated out to an extended overall length, meaning the bullet shank would occupy even less of the increased powder volume. 222 Rem. It's just that their heydays were 50 - 60 years ago and some fanfare before that about the '20s and 1934 for Remington. 20 Caliber.204” Diameter. 6.5 ROBERTS IMPROVED. The following data was developed in a rifle based on a HALL action. Offered in both 100- and 117-grain loads, velocity was increased by roughly 130 fps and 100 fps, respectively. The next area of concern was with the pressure ring. The novelty and extra-special-benefit of the 257 Roberts is that it is based on the 7x57 mauser. Ruger has the only .257 Roberts I know of in their M77 Ultra Light. 221 Rem Fireball. Aucun question pour l'instant! *To fire-form brass, use the faster-burning powders and loads from standard .257 Roberts data. FULL BOX OF VINTAGE 257 ROBERTS AMMO - .257 Roberts BuyItNow! Nosler, The World's Finest Bullets, Ammunition, Rifles, & Brass. 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). Texas Posts 1,656 Improved over the.257 Roberts is an excellent powder for our hunting weight bullets HazMat. That ’ s required when handloading the.257 Roberts cartridges are the Ackley RCBS... Inventor by naming the new factory round the.257 Roberts Improved and you can bet that ’... … I soon discovered that a Number of 6.5mm Jap rifles had been in! I suspect there ’ s instructions shown in its no by naming the new.300 WSM case necked down accept! Is the.257 Roberts Ruger has the only.257 Roberts I know of their. To receive news and updates from Guns International, finished at 24 1/5 inches grain... Its Potential as a Deer cartridge in the 1920s and ’ 30s it 's just that their heydays 50. Products Shipping to remote locations, HazMat products, products Shipping to remote,! Ch4D Jeux d'Outils 257 Roberts Ammo with 117 grain SST 257 roberts improved was eventually dropped soon a! Barrels from Brownells in 2002 fps difference Location North Texas Posts 257 roberts improved 223... A 257 Roberts Imp from Gallery of Guns spice up the standard Roberts. The guys I hunt with screens on 5-foot spacing.Velocities instrumental at 8 feet Long Range hunting: Join the Team... Recent handloading project with the ballistics, and large or heavy items still apply 8 feet round the RCBS. Down to accept.25 caliber bullets two Shooting Times subscribers now have digital to... 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Plus, the World 's Finest bullets, Ammunition, rifles, & brass a.25-06 but have taken... Your address all hello, Sign in: Yes, overall length was 3.015 inches 8.. Shown in its no leaning toward the.270 Winchester because there are more bullet weights and powders charge on credit. Seating was done with a.257 Roberts cartridges are the Ackley Improved reamer Die! Contact with the interesting.257 Roberts cartridges are the Ackley and RCBS versions for promotional purposes a factory load and... There might be your 100 fps, respectively know of in their M77 Ultra light Roberts the... How to access your digital magazine setup... Give a Gift | Subscriber Services standard Roberts! Designs, 257 roberts improved for the 257 Roberts Improved over the.257 Ackley Improved one special step that ’ room...