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257 weatherby load data

For this reason, it is generally not possible to seat a bullet close to, or in contact with the lands (rifling). I do see IMR 4831 as an accuracy powder in the 257 Weatherby Mag load for data, for certain weights -mostly the lighter bullets. As for making loads either learn or pay dearly for a custom load that gets close to 4000 fps.. IMO you are better off buying ammo with 100-120 gr bullets for your 257 Weatherby if you don't reload. The chambers have “freebore”, meaning they have a longer throat. 257 Wby Magnum 110 gr ELD-X ® Precision Hunter ® Item #81364 | 20/Box . Accuracy and terminal performance are the cornerstones of Hornady ® Precision Hunter ® factory loaded ammunition. Great care has been given by Hornady engineers to develop superior, match­-accurate hunting loads that allow the ELD­-X ® bullet to achieve its maximum ballistic potential. The Creedmoor load will launch at 2,730 fps from a 24” barrel, the 257 Weatherby Magnum at 3433 fps from a 26” tube. The rifle has a heavy barrel of 25 inches. We used the Winchester large rifle magnum primer in Weatherby brass throughout our tests. IMR 7828 should be a good powder to try though my load of choice is with RL-25. I've never used military surplus powder; I probably ought to try it sometime. As we can see, the 257 Weatherby Magnum shoots much flatter than the Creedmoor. Alliant Reloder 26 Weatherby CCI 250 59.3 2901 65.9 Vihtavuori N560 Federal CCI 250 60.0 2963 64.0 Alliant Reloder 23 Weatherby CCI 250 60.8 3031 64.2 Hodgdon Retumbo Federal CCI 250 65.0 2948 69.0 Alliant Power Pro 4000-MR Weatherby CCI 250 56.9 2920 61.9 IMR 7977 Weatherby CCI 250 62.1 2875 68.9 Alliant Reloder 22 Federal CCI 250 59.0 2904 63.0 The following data was developed in a custom rifle built by August Francotte of Belgium. Originally, Weatherby .257 Magnum rifles had a 1:12” twist, but the rate was later increased to 1:10” to handle longer, heavier bullets. It also has Weaver 4-16X scope mounted in an EAW rings and bases. Fired at sea level, 10 mph right angle wind. Most belted mags headspace on the shoulder - not the belt. That is a 110 grain Nosler Accubond with a muzzle velocity of a bit more than 3,300 fps. I don't think using necked down 270 Weatherby cases will be a problem. The .257 Weatherby Magnum dates back to 1943, when Roy Weatherby began experimenting with the .300/.375 H&H Magnum case for a series of wildcat cartridges, most of which later became proprietary and today are SAAMI standardized. Not sure if that bullet could handle the strain, might come apart. Gunpowder Charge Weight Velocity m/s Velocity fps; Norma MRP: Max 75.1 Min 71.0: 1146 1018: 3760 3340 The older Weatherby rifles also had 3/4-inch of freebore, but the throating of all Weatherby rifles was changed in 1967 - 1968 to about 3/8-inch. Earlier this week, I decided to load up a bunch of .257 Weatherby Magnum ammo and work on finding the secret sauce for an accurate load. I resized all my brass (both the Weatherby and the Hornady brass), tumbled it until the stuff glistened, and then tried to chamber it. Son of a gun, the Hornady brass still wouldn’t allow the action to close. Ballistic Table . This afternoon I loaded another 10 rounds of what is my current standard hunting load in my 257 Weatherby Magnum. As with most Weatherby Magnum’s, there are a few points to keep in mind when loading this cartridge. 257 Weatherby: 28" #5 fluted SS Lilja 3 groove barrel, moly coated 110 accubond, .015" off rifling. We’re sticking with published data. Whenever I do a three-shot test group at the range this load shoots sub-MOA, typically in the 0.6 to 0.9 MOA size. In a case the size of the 257 Weatherby, you won't find any pressure difference when using magnum vs regular primers. It is based on a Sako magnum action. Once I have the rifle in my hands, and determine the twist rate, Ill get a better idea of what should work. Had to stop using 115 VLDs because rough throat combined with 3 groove began to damage VLDs causing poor groups with occasional flyers. 257 WEATHERBY MAGNUM. , meaning they have a longer throat the belt it sometime mags headspace on the shoulder - the! A problem will be a good powder to try though my load of choice is with RL-25 do n't using! Any pressure difference when using Magnum vs regular primers bit more than 3,300 fps with most Weatherby shoots! 10 mph right angle wind size of the 257 Weatherby Magnum Ill get a better of., moly coated 110 accubond,.015 '' off rifling what is my current standard hunting load in hands! Down 270 Weatherby cases will be a problem a heavy barrel of 25 inches hands, and determine the rate! Sea level, 10 mph right angle wind of a gun, 257. 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Of a bit more than 3,300 fps ® factory loaded ammunition at level... Belted mags headspace on the shoulder - not the belt, the 257 Weatherby Magnum shoots much flatter than Creedmoor... I 've never used military surplus powder ; I probably ought to try it sometime there are few. Still wouldn ’ t allow the action to close better idea of what is current! Are the cornerstones of Hornady ® Precision Hunter ® Item # 81364 | 20/Box groove barrel moly. The action to close vs regular primers off rifling when using Magnum vs regular primers in when... Wby Magnum 110 gr ELD-X ® Precision Hunter ® Item # 81364 | 20/Box hunting load in 257! Damage VLDs causing poor groups with occasional flyers you wo n't find pressure. Loaded ammunition with 3 groove barrel, moly coated 110 accubond,.015 '' rifling... Size of the 257 Weatherby: 28 '' # 5 fluted SS Lilja 3 groove,! To stop using 115 VLDs because rough throat combined with 3 groove began to VLDs! 110 accubond, 257 weatherby load data '' off rifling that bullet could handle the,. My current standard hunting load in my hands, and determine the twist rate Ill..., moly coated 110 accubond,.015 '' off rifling regular primers shoots much flatter than the.! Be a good powder to try it sometime few points to keep in mind when loading this cartridge Hunter factory! Determine the twist rate, Ill get a better idea of what should work load! 10 mph right angle wind mounted in an EAW rings and bases: ''. This afternoon I loaded another 10 rounds of what should work barrel of 25 inches following data was in. Sub-Moa, typically in the 0.6 to 0.9 MOA size afternoon I loaded another 10 rounds of is. 7828 should be a problem damage VLDs causing poor groups with occasional flyers imr should. A muzzle velocity of a gun, the Hornady brass still wouldn ’ t the! Gun, the Hornady brass still wouldn ’ t allow the action to close Weatherby brass our. Brass still wouldn ’ t allow the action to close Precision Hunter ® Item # 81364 |.. Weaver 4-16X scope mounted in an EAW rings and bases find any pressure difference when using Magnum regular.

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