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SAAMI PSI max pressure is 54,000 and thre +P is 58 K. The 58K load is not far from most modern cartridge loadings. 100 grain bullets at close to 3100 fps. Arguably it is a better overall cartridge for hunting than the more popular .30-30, but in recent years has lost ground to the .257 Roberts and flatter-shooting 6mm cartridges such as the .243 Winchester. By Chuck Hawks. Adolph Neidner and Col. Townsend Whelen were also helping Roberts, but at the same time both men were working on their own .25 caliber wildcats based on the .30-06 case. 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 Or would I do better to rechamber for the .25-06? I would guess he used a 7mm x 57 Mauser case. I've used a number of aftermarket triggers in other guns and they all pale in comparison to the Canjar; the sucker has a trigger shoe as wide as a bulldozer blade but boy it is sweet. 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) roger 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. All of my loads were developed with the +P brass. I only use the +P 257 brass, and don't know the difference between it and other 257 brass. Charles Newton developer the cartridge for Savage arms in 1915. Good luck finding one as they are not made anymore. However, it was not until I was introduced to the .257 Weatherby that my idea of what a quarter bore should be about. The .257 Roberts is a derivative of the 7x57mm Mauser, and began life as a wildcat, one of Ned Roberts’ designs. Could barely get the bolt closed. I am happy with those loads, but if you want to get ultra-high velocity try the .25-06 Ackley. Took me a bit to figure out because the guy I bought the gun from also had a scope base screw sticking into the action. DESCRIPTION Roberts 2057 is a premium, clear thin spread adhesive designed for the installation of vinyl composition tile (VCT). As you can see, there is a considerable difference between the .270 and the others. If you are concidering the .257 Roberts, skip it. Then you can seat your bullets out to gain a reasonable amount of velocity without increased barrel wear. PS:The best trigger for your older M77 tang safety is a Canjar set trigger. TECHNICAL INFORMATION: +P = This ammunition is loaded to a higher pressure, as indicated by the +P marking on the case headstamp, to achieve higher velocity. To witness, in a recent discussion (3/30/2010) the number of .257 Weatherby Magnums was commented on as being 125, 50, and less than ten. Refine by Caliber: 375 Rem Ultra Magnum 44 S&W Spl. I do see them on occasion. I bought Win +P brass. What is the best powder for reloading the Ackley version? The real difference is in the twist used for them. Use only in firearms especially designed for this cartridge and so recommended by the manufacturer. Long story short, I had the screw the die down a good amount to even get a round to chamber smoothly, so the brass must be thicker, and though I did not check (because I wasn't really interested) I'd bet the powder capacity is less. Increase your rifle's performance up to 200 fps without extra chamber pressure, recoil, muzzle blast, temperature sensitivity, fouling, or loss of accuracy. I had one done up in a 78 Sportsman Long action for my "Wyoming" rifle. Any further increase is only gained by loading to higher pressure. Yes, you can neck up a 22-250 Lapua case. Just go with the .243 Winchester. Short Action Ultra Magnum. Remington introduced the commercial version of this popular wildcat as a low-pressure round. If you're even considering the .257 Roberts you might as well throw the 6mm Remington in the mix. Longer case life, Good velocity, very efficient. 257 Roberts is a sweet round, very much overlooked. 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. The .257 Roberts is a low recoiling, mild powered cartridge. First, like others in the hunting fraternity, the rifle was the main draw. 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. The plus Ps always gave higher average velocities but the average difference was around 2%. Nov 15, 2011 #5 glo said: Don't know. It was plain wrap RPs vs. +P. All manuals I know of load to the SAAMI specs -both std and +P- and are not as wimpy as they may seem. In my rifle 52gn of Supreme 780 drives the 100gn Speer at 3110fps; 49gn of Re-22 gets the 115gn Barnes TSX going at 3050fps; and 49gn of Supreme 780 has the 117gn Sierra doing 3000fps - from a 550mm barrel. Refine by Caliber: 44 S&W Spl Currently there are … SAAMI pressure max for the 257 RBTS is 45K "CUP" the +P version is 48K "CUP" this is not a psi measurment. It burns roughly about 8 to 10 percent more powder to increase velocity around 5 percent. Sporting Shooter magazine is for those who love the outdoors and the thrill of the hunt. I am a short action fan and would not reccomend the .270 for a woman. I only use the +P 257 brass, and don't know the difference between it and other 257 brass. Mag. Can it equal the ballistics of the .25-06? All of my loads were developed with the +P brass. Performance is very close to the .257 Roberts. (22 inch barrel). 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. These were thought to be rather stout loads. As B Man mentioned, some weatherby ammo really isn't too bad. My gunsmith said the trigger is worth more than the gun! The rifling is on average between 0.006 to 0.008 in height. I'd say split the difference and get the .257 Roberts Ackley. By comparison, the fastest heavy bullet .257 Roberts factory load (Hornady Superformance) drives a 117 grain bullet at 2946 f.p.s. The 257 Roberts is basically a 7x57 Mauser case necked down to take a .257 diameter bullet. His brainchild was developed in the 1920s, but Remington slightly modified the case and legitimized the cartridge in 1934, honoring Mr. Roberts by attaching his name to their new offering. The total increase in capacity is about 4 to 5 grains, depending on which brand of case is used. Build the perfect load has long been the motto of handloaders loyal to Nosler brand bullets–and was the sole reason we developed Nosler® cartridge brass. 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. Put it in a 22" barrel with a little meat on it. I did some measuring on the spent cases and found out it is a .257 Roberts. For every action there is an equal and opposite reaction; that is one of the physical laws of our universe. Is the +P case thicker? P.S. 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 .25-06 which holds another 8 or 9 grains of powder outperforms the .257 Ackley by about 200fps. First the 257 Roberts , it’s a necked down 7x57 ( another fine cartridge ) that churns out a 120 grain bullet at a very nice 2800 FPS . Remington's marketing strategy is what killed the 6mm. 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. Introduced in 2005, the Nosler cartridge brass line is ready to load. Q: How much capacity would I gain by having my Remington Model 700 Classic in 257 Roberts rechambered for the improved version? I'd like to hear what others say in answer to your question. 257 Roberts. If you want to drive a .25 caliber seriously fast, these are definitely among the finest cases with which to do so. The Roberts was designed in the 1920s, and Remington … With modern powders you may gain 100 fps with a 100gn bullet. Sign-up to receive the weekly email newsletter. 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. The .257 Roberts is a low recoiling, mild powered cartridge. My M77 tang safety in .257 Roberts came with a Canjar. The best powder is AR2213Sc, but Re-19 also works well. We were able to write off the number of "ten" by being able to note the existence of five of them in our recent knowledge. Built around the 117-grain round-nose bullet at 2650 fps, and the same 57mm (2.233-inch) case length as its father, the .257 Roberts … Refine by Caliber: 300 AAC Blackout 300 Rem. So a difference of 0.006 inches in dia. The .257 Wby. Both th 25 cal and the 6.5 have never gained the following that they deserve except in 6.5 Creedmoor . It's got the edge on the .243, but is dead just like the .257 Roberts. How much more velocity could I expect to get? The hottest commercial .243 Winchester load I can find is quoted as driving a 100 grain bullet at a muzzle velocity (MV) of 3120 f.p.s. The .257 Roberts was used in a newly introduced Model 70 Featherweight and later, the .25/06 Remington got the nod more often than not. You can load the .260 with 100gr, 120gr, and 140gr bullets, so it is a pretty versatile round for coyote,pigs,pronghorn, and deer. In a short action, it has the potential for a suitable youth rifle but lacks the power with many 117 to 120 grain loads to be of any great advantage over the more common .243. A: In my opinion the .257 Ackley is badly overrated. What is the difference between 257 Roberts and the 257 +P brass? My experience in building a custom Mauser chambered in .257 Roberts. Did some testing today on.257 roberts, identical loads the only difference being the cases. 257 Roberts +P 117 gr SST® Superformance® Item #81353 | 20/Box US Patent: 8,161,885 | 8,413,587. Set the sizing die according to mfgrs. Good question. 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. liltank. Refine by Caliber: 257 Roberts 300 AAC Blackout. Good question. Ned Roberts was busy experimenting with a .257 caliber wildcat based on the 7x57 case which would soon become the .257 Roberts. Less recoil and better exterior ballistics. Short Action Ultra Magnum 375 Rem Ultra Magnum. 6.5x257 Roberts: Warning! So really no real difference there. I know you are a great fan of the standard Roberts, so what would you recommend? and the 6.5 shoots bullets of 0.264 dia. Roberts® 2057 VCT Adhesive 2. As for what brass works best for fireforming, I've never had a problem with either Rem or Win brass. Refine by Caliber: 300 Rem. I'd like to hear what others say in answer to your question. I'd go 7mm-08 as I always hear good things about it. MANUFACTURER Roberts Consolidated Industries, Inc. 300 Cross Plains Blvd Dalton, GA 30721 (866) 435-8665 / (706) 277-5294 3. instructions. Just depends what your looking far, if you want efficient .257 Roberts is prolly your round. The Official Predator Masters Search Engine. With a modern action and handloading, this cartridge is capable of markedly improved performance. It's my understanding that the +P brass is thicker. MV (24 inch barrel). At the time there were many older actions available of questionable strength. By Each week Nick Harvey answers shooters' burning questions | 25 February 2014. I can tell you this. Features and Benefits • Moisture Control Adhesive – The 257 shoots bullets of 0.257 in dia. .257 - about 10lbs.25-06 - about 12.5lbs.270 - about 18lbs. If you want a flat shooting long range rifle, the .257 weatherby mag really stands out here. The .25-06 which holds another 8 or 9 grains of powder outperforms the .257 Ackley by about 200fps.

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