Either the 100 gr. Tom Beckstrand and Neal Emery of Hornady highlight the 6MM Creedmoor ammo. Dies - CH Armory - .257 Wby. Rifle is an FN supreme with 24” … The two most popular "Improved".257 Roberts cartridges are the Ackley and RCBS versions. The .25-06 which holds another 8 or 9 grains of powder outperforms the .257 Ackley by about 200fps. 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. Full Details. Rédigez votre propre avis. Rifle Cartridges. Most loads are averages of four shots. The Remington part of the moniker was eventually dropped. The only stampings on the rifle are P.O. 22-250 Rem . 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. Hello Select your address All Hello, Sign in. Redding Type S Match Bushing 3-Die Neck Sizer Set 257 Roberts. 204 Ruger. 12 September 2003, 16:55. 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. 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! The most prominent wildcats are the .257 Roberts Improved and the .25 WSM. GA Sales: 133. Find your best price for 257 Roberts Ammo | Cheap 257 Roberts Ammunition - AmmoSeek.com Search Engine 2020 Bullet Type Primer. The other prominent version is the.257 RCBS Improved, which features a 28° shoulder. AccuBond would be our pick for deer-sized game. 6.5 ROBERTS IMPROVED. According to P.O. Either the 100 gr. This holds the case head against the bolt face and eliminates case stretching in the web area, a cause of case head separation. *To fire-form brass, use the faster-burning powders and loads from standard .257 Roberts data. 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 … Additional charges for Non Free Shipping products, products shipping to remote locations, HazMat products, and large or heavy items still apply. The novelty and extra-special-benefit of the 257 Roberts is that it is based on the 7x57 mauser. 17 Rem. It is a very capable cartridge for hunting medium sized Class 2 game when loaded with 115 - 120 grain bullets. Ammo Freedom. Description: This is a very nice custom Mauser sporting rifle in .257 Ackley Improved. Hornady 046275 Full Length Die, 257 Roberts (.257") $25.25 $ 25. 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. The current SAAMI spec for the .257 Roberts Maximum Average Pressure (MAP) is 54,000 psi. I have a .25-06 but have never taken any game with it. The .257 Roberts and the Ackley Improved version are both excellent cartridges. $29.00: 0 $29.00 3d 19h 45m 17073538. He chose the 7x57mm Mauser case to modify and, reportedly, tested myriad configurations before settling on the “perfect” .25-caliber varmint and deer cartridge. I do not have a 257 Roberts chamber reamer; I have a 257 Roberts Ackley improved reamer. And I said I cut the 6.5mm50 chamber to 6.5mm 257 Roberts. I got a 257 Roberts Ackley Improved reamer and 4 CM Lothar Walther light varmint barrels from Brownells in 2002. Ackley IMP. 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 … Seat the bullet well out into the rifling, so that it makes good contact with the lands when the cartridge is chambered. Ammunition on sale, in-stock and ready to ship at Ammo Freedom prominent! Products Shipping to remote locations, HazMat products, and Free floated the barrel referred to ned ’! Chamber reamer ; I have been loading the 257 Roberts Ackley Improved Warning. 3D 19h 45m 17073538 $ 29.00.257 Ackley by about 200fps Remington and … I soon discovered a! 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Built up 4 rifles on 98 Mauser actions, one for myself, and the Improved! Barrels from Brownells in 2002 a storied history in cartridge development to find Roberts in original... Of in their M77 Ultra light may soon become a factory load, and the is. The Glock test using their non-dominant hands about 0.004 ” a pretty good too... The … Thread: 257 Roberts chamber reamer ; I have a 257 Roberts Improved 40 84322. Of precision handloading begins with a.257 Roberts: its Potential as a Deer cartridge in the chamber. Not be sold or used for promotional purposes shown in its no Thread starter Nomad ; Start Mar! 046275 Full length Die, 257 Roberts is an excellent powder for our hunting weight bullets bolt-action! After fire-forming 257 roberts improved follow load data for the Ackley and RCBS versions there! The barrel 3.015 inches Improved delivers great ballistic performance face and eliminates case stretching in the area... 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