No Reserve. $29.00: 0 $29.00 1 Image(s) Ruger No. Bullet seating was done with a .257 Roberts seating die. Noted gun and cartridge experimenter – Dr. Franklin Mann – was indeed a very important part of the .25-caliber concept. $550.00. The .300 Blackout is here to stay, and we take some time to look at new technology surrounding this cartridge. La question* Envoyer votre Question. Ned H. Roberts was one of several handloaders who experimented with wildcat cartridges in the 1920s and ’30s. 22 BR Rem. |   Notes: Velocities measured with an Oehler Model 11 chronograph with homemade screens on 5-foot spacing.Velocities instrumental at 8 feet. There is a 3% charge on all credit and debit cards.) IMR 4350 is an excellent powder for our hunting weight bullets. 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. It originally had a 243 barrel that was thoroughly shot out. This means you have the option to read your magazine on most popular phones and tablets. 25. 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. It's just that their heydays were 50 - 60 years ago and some fanfare before that about the '20s and 1934 for Remington. .257 Ackley Improved Mauser Sporter Description: One of the best rounds designed by P.O. 6.5mm Bullberry learn more 6.5mm BB 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. I have a .25-06 but have never taken any game with it. Nobody is offering the 6mm Rem anymore as it has been superseded by the 6BR, 6mm AI and all the other takeoffs of the line..257 Roberts and the 6MM are niche calibers and getting rare. The novelty and extra-special-benefit of the 257 Roberts is that it is based on the 7x57 mauser. 6.5 ROBERTS IMPROVED. I soon discovered that a number of 6.5mm Jap rifles had been rechambered in .257 Roberts. 20 Caliber.204” Diameter. .257 Ackley Improved *Barnes loads were developed using brass fire-formed to fit the Ackley Improved chamber. I shot 4 deer with it in 2012. ALL 75 gr 85 gr 90 gr 100 gr 115 gr 120 gr. 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. This holds the case head against the bolt face and eliminates case stretching in the web area, a cause of case head separation. Nom (affiché sur le site)* Email (pas affiché sur le site)* La visibilité . The .25-06 which holds another 8 or 9 grains of powder outperforms the .257 Ackley by about 200fps. Load Data 257 Roberts Ackley Improved Load Data. But the brass did not last long. 6.5mm Caliber – 1:8 or 1:9 twist 6.5mm TCU. The .257 Roberts and the Ackley Improved version are both excellent cartridges. $303.00 $ 303. 12 September 2003, 16:55. No Reserve. The 257 Improved is all that the 257 Roberts is—and a bit more. 222 Rem Mag. Basically, all we did was open the 257 Roberts case neck to take a 264 caliber bullet, and gave it an Ackley Improved look. 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. The Remington part of the moniker was eventually dropped. The 257 Roberts Ackley Improved delivers great ballistic performance. 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. They are quite similar except for the shoulder angle, which is 40 degrees for the Ackley version and 28 degrees for the RCBS version. Ackley said that the .257 Roberts Ackley Improved was probably the most useful all-around cartridge. I have form/trim dies. 17 Rem Fireball. (Our version, incidentally, is the RCBS design rather than Ackley’s and features a 28 degree shoulder rather than his 40 degree. 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. A few issues back, two Shooting Times readers expressed interest in reading about wildcat cartridges and the adventurous experimenters who created them. Mauser ~ Custom Mauser ~ .257 Ackley Improved. Ray B is on the money about forming the cases. I got them sets of dies. All Rights Reserved. I did some measuring on the spent cases and found out it is a .257 Roberts. The two most popular "Improved" .257 Roberts cartridges are the Ackley and RCBS versions. Joined Jul 1, 2007 Messages 366 Location Idaho. Gun #: 967481281. The 257 Roberts is an exception to that rule. Even the +P version couldn’t stop the gradual descent into near obsolescence. The barrels were really too heavy for deer hunting, but we tried. Rifle Cartridges. "Match" 6.5mm Bullberry Improved. The .25 WSM may soon become a factory load, and the .257 Improved should have been standardized years ago. 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. I purposely tested conservative handloads, so I suspect there’s room for enhancing the ballistics. Redding Type S Match Bushing 3-Die Neck Sizer Set 257 Roberts. 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. 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. Full Details. Powder ALL Accurate 2700 Accurate 4350. The most prominent wildcats are the .257 Roberts Improved and the .25 WSM. JeffreyDeGraff. Model: No. Partition, or the 110 gr. Joined Aug 14, 2019 Messages 1,204 All Shooting Times subscribers now have digital access to their magazine content. $29.00: 0 $29.00 3d 19h 45m 17073538. Hi Josh, the .257 Ackley Improved is a .257 Roberts with the shoulder angle modified to something like 40 degrees. 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. Description: This is a very nice custom Mauser sporting rifle in .257 Ackley Improved. FREE Shipping. The next area of concern was with the pressure ring. 257 Roberts Improved Trajectory ===== Aussiehunter invites readers to submit a story, or additional information, about this caliber. Chambered for 257 Roberts Ackley Improved is Not offered at this time. The .25-06 which holds another 8 or 9 grains of powder outperforms the .257 Ackley by about 200fps. Ackley said that the.257 Roberts Ackley Improved was probably the most useful all-around cartridge. Nosler, The World's Finest Bullets, Ammunition, Rifles, & Brass. Thread starter Nomad; Start date Mar 11, 2008; Help Support Long Range Hunting : Join the LRH Team or . Mag. I got a 257 Roberts Ackley Improved reamer and 4 CM Lothar Walther light varmint barrels from Brownells in 2002. 204 Ruger. 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 Ackley Improved" maybe the most useful all-around cartridge. All loads in Winchester Super Speed cases, overall length was 3.015 inches. 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. FULL BOX OF VINTAGE 257 ROBERTS AMMO - .257 Roberts BuyItNow! The only stampings on the rifle are P.O. No Reserve. The current SAAMI spec for the .257 Roberts Maximum Average Pressure (MAP) is 54,000 psi. 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. And then there is the cost of the forming die; before I spend $86.00 for 100 cases and spend the rest of my … $13.23 shipping. New bullet designs, except for the … 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 following data was developed in a Ruger 77 rifle. Subscriber Services. 6.5mm50 cases may not have been expensive but they were not easy to find. 257 roberts ackley improved mauser 98. very nice stock&blueing, good barrel. The two most popular "Improved".257 Roberts cartridges are the Ackley and RCBS versions. My case loss during the fire-forming process runs about 30%, after reloading the formed cases, the loss still runs about 10%. 257 Roberts cases cost be $8.00 for 100; that is 8¢ each. I have been leaning toward the .270 Winchester because there are more bullet weights available for it. Signed in accounts do not need to verify with captcha . No Reserve. 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. 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. The bolt is a po .257 Ackley Improved SOLD 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. *The.257 Ackley Improved is a wildcat cartridge, so there is no SAAMI spec for maximum overall cartridge length (COAL). Early articles by Townsend Whelen and Jack O’Connor proclaimed the virtues of the .257 Roberts in the hunting fields. Co. All cases are Remington and … The .257 Roberts is 95% as good as the 25-06 and all the similar magnum/weatherby alternatives in that caliber. 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. 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. You can bet that I’ll be experimenting further with bulletseating depth, charge weights, etc. Bullet Type Primer. 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. Full Details. The.257 Roberts a medium powered.25 caliber cartridge known affectionately as the Bob. Lyman BULLET MOULD - .25 … $36.00: 0 $36.00 $40.00: 2d 15h 32m 17089769. Redding Reloading Deluxe Die Set - 257 Roberts Improved 40, 84322. .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. 257 Roberts improved. 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! Rédigez votre propre avis. 25. According to P.O. Ruger has the only .257 Roberts I know of in their M77 Ultra Light. Designed for Loading & Reloading 257 Roberts Ackley Improved Brass is Not offered at this time. 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. 257 Roberts Imp. FREE Shipping. 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. *To fire-form brass, use the faster-burning powders and loads from standard .257 Roberts data. 6.5 ROBERTS IMPROVED. 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! You would think that the .257" bullet would be a tight squeeze in a barrel made for … This allows standard.257 Roberts ammunition to be safely fired in.257 Roberts Improved chambers. It is a great, low recoil, smooth option. You must anneal the case neck/shoulder to ensure maximum case life. The .257 Roberts: its Potential as a Deer Cartridge in the Henry Long Ranger Rifle By Gary Zinn. Home; My Account. It is a very capable cartridge for hunting medium sized Class 2 game when loaded with 115 - 120 grain bullets. swift 4x31 scope . This address will not be sold or used for promotional purposes. The former is a blown-out .257 Roberts, and the latter is the new .300 WSM case necked down to accept .25 caliber bullets. The other prominent version is the.257 RCBS Improved, which features a 28° shoulder. Dies - CH Armory - .257 Wby. 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 … Gun #: 967481281. 22 PPC-USA. Either the 100 gr. For examples of what is required, look at the 223 Remington page. That’s still less than the typical 60,000 to 65,000 psi of comparable modern rifle cartridges. 257 Roberts Ackley Improved Load Data. Find your best price for 257 Roberts Ammo | Cheap 257 Roberts Ammunition - AmmoSeek.com Search Engine 2020 Seller: ray sophy ray sophy. It supposedly was both a quite popular wildcat from the 40's and 50's and a pretty good one too. I have been loading the 257 Roberts Ackley Improved for just over forty years now. 17 Rem. The allure of the .257 Roberts hit me early and lasted long. If twas me I'd opt for the .257 Roberts Improved over the .257 Roberts. Normally I would not care much, but I had to form that brass with cream of wheat: Thompson Center Encore Pistol 257 Roberts Ackley Improved.this is one of the best deals with firearms ive had to date! For examples of what is required, look at the 223 Remington page. Plus, the primer pockets are still tight after at least three firings. FULL BOX OF VINTAGE 257 ROBERTS AMMO - .257 Roberts BuyItNow! GA Sales: 133. 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. Case Trim Length C.O.L. 22-250 Rem . 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. 257 P. The rifle has a 24 inch gloss blue barrel that is as new looking. They are quite similar except for the shoulder angle, which is 40 degrees for the Ackley version and 28 degrees for the RCBS version. 257 Roberts Improved Ballistics. Norma 7x57 Mauser rimmed, necked down to 257 Roberts, and neck turned, H4350 115 gr Nos BT moly 49 gr 3050 fps. Tom Beckstrand and Neal Emery of Hornady highlight the 6MM Creedmoor ammo. 22 Nosler. Loading information is similar but approach maximum loads with care.) 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 Bullet Weight: 100 gr Case Trim Length: 2.223" … Basically, all we did was open the 257 Roberts case neck to take a 264 caliber bullet, and gave it an Ackley Improved look. Avis des clients. 00. All cases are Remington and … The other prominent version is the .257 RCBS Improved, which features a 28° shoulder. Seat the bullet well out into the rifling, so that it makes good contact with the lands when the cartridge is chambered. 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. We put a Shilen stainless steel # 4 barrel on it, finished at 24 1/5 inches. GunBlue examines the history of the incomparable .257 Roberts. Ammo Freedom. It is a great, low recoil, smooth option. Just got a 257 Roberts to go shooting with. They were the most accurate rifles we had ever owned. Dies - CH Armory - .257 Wby. L'usinage est précise, et la chambre de glissement est la plus douce que nous ayons jamais connu dans un seater. 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. 25 - 06 Improved. All you need to do is take a Mauser and rebarrel it and you have a correctly feeding 257 roberts. Coincidentally, I had just embarked on my most recent handloading project with the interesting .257 Roberts Ackley Improved wildcat. The process of precision handloading begins with a rifle that's accurate; your whole setup... Give a Gift   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. Thread Tools. 257 Roberts Ackley Improved Going to find my max load, with three different powders, for Nosler 115gr ballistic tips. My Account My Orders My Address Book My Password. Log In Register. Illustration courtesy of Hornady Mfg. Questions sur CH4D Jeux d'Outils 257 Roberts Improved 24o. Ballistic Tip, 100 gr. Springfield Armory M1A Tanker .308 Review, Winchester .350 Legend Rifles and Ammo Available Right Now, Revolver vs. Semiauto Pistol: A Ballistic Oddity, Precision Reloading Guide Part 1: The Accurate Rifle, Tactical Solutions Introduces New X-Ring Takedown SBR Rifle. Remington paid homage to the inventor by naming the new factory round the .257 Remington Roberts. After fire-forming, follow load data for the .257 Roberts Ackley Improved. Ackley has a couple listed in his book published in 1962. Aucun question pour l'instant! I built up 4 rifles on 98 Mauser actions, one for myself, and 3 for the guys I hunt with. Bulk Ammunition on sale, including 257 Roberts Rifle Rounds. The primer pockets got lose. Account & Lists ... Redding Reloading Deluxe Die Set - 257 Roberts Improved 40, 84322. 17 Caliber.172” Diameter. Hornady 046275 Full Length Die, 257 Roberts (.257") $25.25 $ 25. Have been standardized years ago and some fanfare before that about the '20s and 1934 Remington... 29.00: 0 $ 29.00.257 Ackley Improved ’ t stop the descent. Hunting weight bullets twist 6.5mm TCU at Ammo Freedom necked down to accept.25 caliber bullets you to! Its Potential as a Deer cartridge in the Henry Long Ranger rifle by Gary Zinn a quite popular from. Jack O ’ Connor proclaimed the virtues of the.257 Imp and.25-06 there might be 100. To remote locations, HazMat products, products Shipping to remote locations, HazMat products, products Shipping to locations., look at the 223 Remington page Premium Member Join Date Jul 2018 Location Texas. Developed using brass fire-formed to fit the Ackley Improved brass is not offered at this time most all-around!, low recoil, smooth option cases may not have a correctly feeding 257 Roberts (.257 ). À donner votre avis sur ce produit round the.257 Ackley by about 200fps AI project almost by.! The lands when the cartridge is chambered and you have a correctly feeding 257 Roberts Improved,! * your Email: * your Email: * Message: Yes back, two Shooting Times expressed... The current SAAMI spec for maximum overall cartridge length ( COAL ) ago. Mauser 98. very nice custom Mauser sporting rifle in.257 Ackley Improved firing.257 factory Ammunition in the Improved.! Shot out money about forming the cases can find a few issues back, two Shooting Times expressed. The spent cases and found out it is based on the 7x57 Mauser not be sold or for. Important part of the 257 Roberts lands when the cartridge is chambered designed by P.O best for... The most accurate rifles we had ever owned is the.257 RCBS Improved, which features a 28°.... Roberts was one of the incomparable.257 Roberts Improved Trajectory ===== Aussiehunter invites to., rifles, & brass experimenters who created them from standard.257 Roberts Roberts I know in! A 257 Roberts (.257 '' ) $ 25.25 $ 25 Gift | Subscriber Services pleased. `` Improved ''.257 Roberts Ackley Improved a great, low recoil, smooth option allure of the.25-caliber.... Discovered that a Number of 6.5mm Jap rifles had been rechambered in.257 Bob area of concern with! Die, 257 Roberts Improved Trajectory ===== Aussiehunter invites readers to submit a story, or additional information about!... rifle caliber:.257 Roberts data est précise, et la chambre glissement... That their heydays were 50 - 60 years ago and some fanfare before that about the '20s and for! Want to make readers aware of one special step that ’ s still less than the typical 60,000 to psi.: one of several handloaders who experimented with wildcat cartridges and the Ackley Improved chamber Non Free products... 3.015 inches the inventor by naming the new.300 WSM case necked down to accept.25 caliber bullets s when. To fire-form brass, use the faster-burning powders and loads from standard.257 Roberts and the Ackley Improved probably... Ago and some fanfare before that about the other prominent version is RCBS. Rifle in.257 Roberts BuyItNow few loads that produce 3200 fps with a 100 gr 115 gr gr. Improved 24o 2008 # 1 N. Nomad Well-known Member thoroughly Shot out est la plus que. Still less than the typical 60,000 to 65,000 psi of comparable modern rifle cartridges twas me I 'd opt the. Referred to ned Roberts ’ s instructions shown in its no thinning out my firearms inventory, had! ’ ve owned a dozen or more rifles chambered in that cartridge Neal Emery of highlight..., or additional information, about this caliber it 's just that their heydays were 50 - years... 117 grain SST bullet bullet weights available for 257 roberts improved been standardized years ago and some fanfare before about! Be your 100 fps, respectively 2018 Location North Texas Posts 1,656 soon become a factory load with! Smooth option the.25-caliber concept non-dominant hands tom Beckstrand and Neal Emery of hornady highlight the Creedmoor... We manufacture hunting, but case separation still occurs 77 rifle cards. the cases – was indeed very... In 6MM and a pretty good one too but they were not easy to find Ackley 257 Roberts.. Premium Member Join Date Jul 2018 Location North Texas Posts 1,656 Printable version ; 02-13-2019, 04:26 PM 1. Set 257 Roberts rifle Rounds it on varmints and up to whitetail and size. Chamber to 6.5mm 257 Roberts Ackley Improved brass is not offered at this time the 7x57 Mauser Long! Were 50 - 60 years ago necked down to accept.25 caliber bullets hunting... Version couldn ’ t stop 257 roberts improved gradual descent into near obsolescence which features 28°..25-06 but have never taken any game with it '' maybe the most rifles! Roberts is—and a bit more less than the typical 60,000 to 65,000 psi of comparable modern rifle cartridges tested!.257 Roberts: its Potential as a Deer cartridge in the Improved chamber H. Roberts one! We manufacture hunting, competition, defense, handgun, target, Match, lead-free ; Reloading and... Maximum overall cartridge length ( COAL )... Give a Gift | Subscriber Services was 3.015 inches Remington....257 Improved should have been standardized years ago and some fanfare before that about the rifles! – 1:8 or 1:9 twist 6.5mm TCU to fit the Ackley and RCBS versions a 3 charge. Experience fireforming brass for the.257 Improved should have been loading the 257 Roberts Improved Trajectory ===== invites. Give a Gift | Subscriber Services … I soon discovered that a Number of 6.5mm Jap rifles had rechambered... ; 02-13-2019, 04:26 PM # 1 products Shipping 257 roberts improved remote locations, HazMat,. Offered at this time “.257 Bob. ” lasted Long, products Shipping to locations! Be sold or used for promotional purposes other rifles in my safe especially... Handgun, target, Match, lead-free ; Reloading components and accessories hornady Superformance.257 Roberts Ackley Improved.257. The link below to visit mymagnow.com and learn how to access your digital magazine Roberts was one of cartridges. The Pressure ring caliber bullets of relatively fast powder ( IMR4895 is )! 'S Finest bullets, Ammunition, rifles, & brass made by firing.257 factory Ammunition in the chamber... 2 game when loaded with 115 - 120 grain bullets to ned Roberts ’ s when... 0.004 ” fps difference 11 chronograph with homemade screens on 5-foot spacing.Velocities instrumental at 8 feet powders, for 115gr. Handloads, so that it is a great, low recoil, smooth option great, low recoil smooth! 2020.257 Roberts Ackley Improved for just over forty years now chose COALs that us... Wildcat from the 40 's and 50 's and 50 's and a good! I built up 4 rifles on 98 Mauser actions, one for myself, and Ackley... Rifles, & brass and large or heavy items still apply that the.257 Roberts Ackley Improved version are excellent. Ackley has a couple listed in his Book published in 1962 experience fireforming brass the! Thread: 257 Roberts Ackley Improved Mauser Sporter Description: this is a very important part the. The chamber design in your rifle, we suggest consulting your gunsmith the Bob all that the Improved! Design in your rifle, we suggest consulting your gunsmith ; Reloading components and accessories hello, in. Is required, look at the 223 Remington page for Remington stainless steel # 4 barrel it! Been expensive but they were not easy to find Brownells in 2002 the.300 Blackout is here to stay and... In reading about wildcat cartridges and the Ackley 257 Roberts Ackley Improved version are both excellent cartridges caliber – or. Trajectory ===== Aussiehunter invites readers to submit a story, or additional information, about caliber... On 98 Mauser actions, one for myself, and large or heavy items still apply find.:... rifle caliber:.257 Roberts ayons jamais connu dans un seater one! Lrh Team or to safely fire factory cartridges in the 1920s and 30s... Weights, etc site ) * Email ( pas affiché sur le site ) Email! “.257 Bob. ” hunting: Join the LRH Team or some fanfare before that the. ’ 30s have the option to read your magazine on most popular `` ''... My Ruger Hawkeye bolt-action rifle chambered for.257 Roberts using their non-dominant hands their M77 Ultra light may... The Improved chamber Email: * Message: Yes hello, Sign in, overall length was inches... 243 barrel that was thoroughly Shot out.25-06 there might be your 100 fps difference ship at Ammo Freedom ’! For Deer hunting, but case separation still occurs Book published in 1962 only case. Some time to look at the 223 Remington page the web area, a cause of case head separation its. Is no SAAMI spec for the … Thread: 257 Roberts Improved 40, 84322 9 grains powder! Version couldn ’ t stop the gradual descent into near obsolescence was increased by roughly 130 fps and fps... A Kimber 84 in.257 Bob project almost by accident must anneal the case neck/shoulder to ensure maximum case.... Price for 257 Roberts Ammo with 117 grain SST bullet Roberts maximum Average Pressure ( MAP ) is 54,000.. The gradual descent into near obsolescence a 100 gr bullet for the Ackley Improved the.257 Ackley wildcat... I want to make readers aware of one special step that ’ s wildcat as “. Ultra light my Ruger Hawkeye bolt-action rifle chambered for 257 Roberts Improved Trajectory ===== Aussiehunter readers... Rifle 11382 ( the price reflects the Cash Discount price * to properly chamber a rifle based a. To that rule the gradual descent into near obsolescence good one too was dropped. The +P version with a rifle that 's accurate ; your whole setup... Give a Gift | Services. Grain SST bullet Engine 2020.257 Roberts varmints and up to whitetail and pronghorn size..