Date: Feb 11 2014. N.H. "Ned" Roberts developed the .257 Roberts cartridge during the 1920s by necking the 7mm Mauser case to accept .257-inch bullets, and by changing the shoulder angle from 20 to 15 degrees. Roberts was a well-known experimenter and gun writer, and his cartridge became a popular wildcat among custom rifle builders and hunters.1. Never begin loading with the maximum powder charge shown in these reloading data tables, regardless of your experience. 2. Never exceed maximum loads because excessive chamber pressure will result. 3. Discontinue firing at the first sign of excessive pressure or upon noticing a change in the. report of the firearm.Notes from the Lab: .257 Roberts (using Sierra bullets) N.H. “Ned” Roberts developed the .257 Roberts during the 1920s by necking the 7mm Mauser (aka 7x57) case to accept .257-inch bullets and by changing the shoulder angle from 20 to 15 degrees. Roberts was a well-known experimenter and gun writer, and his cartridgeRemarks: COAL (inches): 3.020; 3-shot 100-yard group (inches): .77. .257 Roberts Ackley Improved (Load Development) reloading data with 45 loads. Using bullets from Nosler Ballistic Tip Varmint, Hornady GMX, Hornady ELD-X, Nosler Ballistic Tip Hunting, Berger VLD Hunting. Powders include Hodgdon, Alliant, Ramshot, IMR, Accurate, Vihtavuori ...May 19, 2011 ... Again, seated one caliber deep, for an OAL of 2.976", QuickLoad suggests a compressed charge of 56 grains IMR7828, generating just under 47,000 ...Feb 16, 2024 ... In this video we show you how convert 30-06 cases to 257 Roberts. ... Reloading, How to Reform Brass ~ Use What You Have! ... Kentucky Ballistics• ....257 Roberts reloading data with 8 loads. Using bullets from Sierra jacketed hollowpoint, Hornady jacketed hollowpoint, Speer jacketed hollowpoint, Nosler Solid Base, Nosler Partition, Sierra spitzer boat-tail, Hornady hollowpoint. Powders include IMR, Norma, Hodgdon, Winchesterkleanbore 1. Oct 31, 2020. #1. Any long time shooters of the 257 Roberts, a question for you. What powders do you prefer for the heavier bullets, say 90gr-120gr I have IMR 4350, 4064, 3031, Varget , Reloader 15 and others. I know, what shoots good in your rifle may not in mine. Looking for a consensus on where to start.Load Data for .257 Roberts. Bullet: 115 gr PART (NOS) Diameter: 0.257" Powder: StaBALL 6.5 (Winchester) Starting Powder: 38.5 gr. Max Powder: 43.0 gr. Primer: REM 9½. Case: REM. Trim Length: 2.223" Cartridge Overall Length: 2.890" Starting Velocity: 2,595. Starting Pressure: 38,800. Max Velocity: 2,831. Max Pressure: 46,000 CUP.Printed from Shooter's Reference on 04/20/2024: https://www.shootersreference.com/reloadingdata/257-roberts/Wt. .257 Roberts (Using Nosler Bullets) reloading data with 150 loads. Using bullets from Nosler BT, or CT Ballistic Silvertip, Nosler BT, Partition Spitzer or E-Tip, Nosler Accubond, Nosler Solid Base Ballistic Tip (blue), Nosler, Nosler Partition Spitzer. Powders include Alliant, Accurate, IMR, Hodgdon, Vihtavuori, Ramshot, Winchester. Hornady Manufacturing Company develops and publishes reloading data for the Handbook of Cartridge Reloading. Occasionally, we will temporarily publish load data on this page when a bullet becomes available and is not yet listed in the latest edition of the handbook. 6.5mm .264" 100 gr. ELD-VT™ [PDF] 22 ARC (Bolt Gun) [PDF] 22 ARC (Gas Gun) [PDF] 6.5x257 Roberts: Warning! 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 … WLR; min. OAL (inches): 2.775; case: Win. bbl length: 24. Be Alert: Publisher cannot be responsible for errors in published load data. Wt. .257 Roberts +P (Alliant Data) reloading data with 4 loads. Using bullets from Sierra HP, Speer Spitzer, Sierra HPBT. Powders include Alliant. .257 Roberts in a 24-inch Barrel reloading data with 10 loads. Using bullets from . Powders include Winchester, IMR ... .257 Roberts in a 24-inch Barrel: Warning! Notes: Handloader Issue 130: Be Alert: Publisher cannot be responsible for errors in published load data. Wt. Bullet: Powder Manufacturer: Powder: Charge: Velocity (FPS) 90 ...The .257 Roberts was the premier combination varmint/deer cartridge until the .243 Winchester and .244 Remington were introduced in 1955. These cartridges were highly touted by Warren Page, the Shooting Editor at Field & Stream magazine, and appeared to be ballistically superior to the .257 Roberts.Warning! Barrel Length: 24 inches; Primer: Federal 210; Source: Handloader Magazine issue #306 February-March 2017. Be Alert: Publisher cannot be responsible for errors in published load data. Wt. .257 Roberts (using Alliant's RL-16) reloading data with 2 loads. Using bullets from Nosler Ballistic Tip, Hornady SST.This question is about the NetSpend® Visa® Prepaid Card - Pay-As-You-Go @lisacahill • 06/27/19 This answer was first published on 06/27/19. For the most current information about a...257 Roberts +P; 26 Nosler; 260 Remington; 264 Winchester Magnum; 27 Nosler ; 270 Weatherby Magnum; ... Safety Data Sheets; Load Data. Nosler Load Data; Reloading Glossary; Dealer Locator. Sign In / Register. Search. Search. Search. Advanced Search Sign …For a performance comparison, let’s put current .257 Roberts +P handloads next to its more modern challenger, the .25-06 Remington (1969). Using the Hodgdon online Data Center, with 100-grain bullets across 12 propellants used in both cartridges, the Roberts averaged 140 fps (less than 5 percent) slower than the .25-06.Reloading Costs Calculator; Case Crimp Calculator; Energy, Momentum, Power Factor, and Taylor Knock-out Calculators ... About / Support; Disclaimer; Contact; Log in / Sign up. Manufacturer Loading Data Popular Cartridges.17 Ackley Hornet.17 Hornet.17 Remington.204 Ruger.22 - 250 Remington.22 ARC (Advanced Rifle Cartridge) ... .257 … 120gr. Spitzer. 2.750". 0.391. 0.260. This data was developed to the 257 Roberts +P pressure level of 58,000 psi, and should only be used in modern rearms and +P cases designed for these pressures. Mar 8, 2004 · Well, I'm about three weeks into reloading for the .257 Roberts +P. So far I have three good loads worked up and have loaded but not test-fired another batch. The results so far: Common components. Win brass, CCI 250 primer. 75g Hornady VMAX. COL 2.8025". 42.0g Varget. 3187fps, 7.0fps STD, 16fps E.S. Load Data for .257 Roberts . Bullet: 115 gr PART (NOS) Diameter: 0.257" Powder: Hybrid 100V (Hodgdon) Starting Powder: 42.0 gr. Max Powder: 46.0 gr . .257 Roberts reloading data with 8 loads. Using bullets from Sierra jacketed hollowpoint, Hornady jacketed hollowpoint, Speer jacketed hollowpoint, Nosler Solid Base, Nosler Partition, Sierra spitzer boat-tail, Hornady hollowpoint. Powders include IMR, Norma, Hodgdon, Winchester257 Roberts Load Data Using Hornady reloading data with the 257 Roberts bullets creates a great round that is popular with hunters who like its low recoil rates. The .257 Roberts dates way back to around the 1920's but many still use it to this day. Be Alert: Publisher cannot be responsible for errors in published load data.Aug 17, 2022 ... Comments288 ;.257 Roberts. Johnny's Reloading Bench · 54K views ; how to reload 30-.06. Jason Williams · 156K views ; How to Reload 9mm Ammo For&...The cartridge is a 7x57 necked down but they don`t say if any other changes are made other then to the neck diameter. Velocities appear to be in the 6.5x55 range, ~2600 fps with 140 gr bullets. The Hodgdon #26 manual has data for the 6.5x257 which would be based on the same parent case.Barrel Length: 24 inches; Twist: 1-10 inches; Case: Remington; Primer: Winchester Magnum (WLRM). Be Alert: Publisher cannot be responsible for errors in published load data. Wt. .257 Roberts (Norma data) reloading data with 20 loads. Using bullets from Hornady SP, Nosler Partition, Nosler BST, Hornady RN. Powders include Norma.Load Data for .257 Roberts . Bullet: 80 gr TTSX BT (Barnes) Diameter: 0.257" Powder: IMR 4451 (Improved Military Rifle) Starting Powder: 43.2 gr. Max Powder: 48.6 gr .Joined: Sep 2007. Posts: 11. I'm planning to start reloading a Ruger M77 in 257 Roberts with H4350 powder and Speer 120 bullets which I currently have on hand. I will be using Winchester +P brass. The Speer manual does not have a load listed using H4350. I have seen suggested maximum loads in articles ranging from 42 grains to 47 grains …The Hornady Handbook and Nosler Reloading Guide show maximum reloads for the .257 Improved (either version) achieving muzzle velocities (MV) of about 3600 fps with a 75 …Reloading data for 257 Roberts. Bullet: Hornady SP 87 gr: Bullet weight: 5.6 g / 87 gr: B.C: 0.322: C.O.L: ... Reloading Governmental News Languages Close language ...Feb 16, 2024 ... In this video we show you how convert 30-06 cases to 257 Roberts. ... Reloading, How to Reform Brass ~ Use What You Have! ... Kentucky Ballistics• ... .257 Roberts +P (Accurate Loading Guide #2) Warning! Notes: This data is only for use in modern firearms, approved by a gunsmith or manufacturer, for use with higher pressure +P ammo. The SAAMI Maximum Average Pressure for the .257 Roberts +P is 58,000 PSI. Factory +P ammo produced 51,000 PSI in our test barrel. These loads do not exceed that ... Load data with 94 loads for .257 | 100gr | Sierra SPT Pro-Hunter bullet in caliber .257 Roberts*To fire-form brass, use the faster-burning powders and loads from standard .257 Roberts data. *To properly chamber a rifle for .257 Ackley Improved cartridges, a gunsmith must set the original barrel back about 0.004”. The chamber distance from the bolt face to the junction of shoulder and neck is shorter in Ackley Improved rifles than in ....257" 25 Spitzer SP Hot-Cor® 25 HP 25 Spitzer BTSP Weight (grains) 100 ... Refer to the current SPEER® Reloading Manual for handloading instructions. Be ... 257 Roberts +P 3064 3113 3110 3094 3091 3055 3053 3050 3030 3023 2944 2871 2842 2807 MAXIMUM CHARGE Muzzle Velocity (feet/sec) 2878.257 Roberts (Barnes Reloading Manual #3) Warning! Notes: case: Remington; parent case: 7x57 Mauser; primer: Federal GM 210M; trim to: 2.223"; barrel: 24"; XLC Coated X-Bullet data cannot be used with other bullets, including non-coated X-Bullets; maximum loads should be used with caution - Always Start With Minimum Loads Be Alert: …Jun 27, 2019 · The current SAAMI spec for the .257 Roberts Maximum Average Pressure (MAP) is 54,000 psi. Winchester introduced a +P version with a MAP of 58,000 psi in the mid-1980s. That’s still less than the typical 60,000 to 65,000 psi of comparable modern rifle cartridges. The .257 Roberts was pretty popular for a few years before and after World War II ... .257 Roberts Select Handloads reloading data with 6 loads. Using bullets from Hornady V-Max, Nosler Ballistic Tip, Sierra Spitzer, Barnes Triple-Shock, Remington Core-Lokt PSP, Remington Core-Lokt PSP Ultra Bonded. Powders include Hodgdon, Alliant 120gr. Spitzer. 2.750". 0.391. 0.260. This data was developed to the 257 Roberts +P pressure level of 58,000 psi, and should only be used in modern rearms and +P cases designed for these pressures. The .257 Roberts Improved. The two most popular "Improved" .257 Roberts cartridges are the Ackley and RCBS versions. They are quite similar except for the shoulder angle, which is 40 degrees for the Ackley version and 28 degrees for the RCBS version. The Hornady Handbook and Nosler Reloading Guide show maximum reloads for the .257 Improved ...Set up this way and using hand loads, the Roberts was able to fire a 100 grain bullet at 3000fps and a 117 grain Spitzer at 2800fps. Nevertheless, for the ...The .257 Roberts Improved. The two most popular "Improved" .257 Roberts cartridges are the Ackley and RCBS versions. They are quite similar except for the shoulder angle, which is 40 degrees for the Ackley version and 28 degrees for the RCBS version. The Hornady Handbook and Nosler Reloading Guide show maximum reloads for the .257 Improved ...Wt. .257 Roberts (Using Nosler Bullets) reloading data with 150 loads. Using bullets from Nosler BT, or CT Ballistic Silvertip, Nosler BT, Partition Spitzer or E-Tip, Nosler Accubond, Nosler Solid Base Ballistic Tip (blue), Nosler, Nosler Partition Spitzer. Powders include Alliant, Accurate, IMR, Hodgdon, Vihtavuori, Ramshot, Winchester.Reloading . 257 Roberts +P Quickload Request ... .257 Roberts +P+ (not SAAMI) Bullet : .257, 115, Nosler BalTip 25115 Useable Case Capaci: 47.503 grain H2O = 3.084 cm³ Cartridge O.A.L. L6: 2.775 inch = 70.49 mm Barrel Length : 20.0 inch = 508.0 mm Powder : Alliant Reloder-22 Predicted data by increasing and decreasing the given …*To fire-form brass, use the faster-burning powders and loads from standard .257 Roberts data. *To properly chamber a rifle for .257 Ackley Improved cartridges, a gunsmith must set the original barrel back about 0.004”. The chamber distance from the bolt face to the junction of shoulder and neck is shorter in Ackley Improved rifles than in ...I did some estimates of recoil with the heavy hunting loads I have featured. Assuming a field ready weight (rifle, scope, sling and cartridge load) of 8.5 ....257 Roberts Handloads reloading data with 18 loads. Using bullets from Hornady FP, Speer FP, Hornady V-Max, Nosler Ballistic Tip, Partition, Hornady, Hornady boat-tail. .257 Roberts (Barnes Reloading Manual #4) reloading data with 40 loads. Using bullets from Barnes TTSX BT, Barnes Banded Solid Spitzer, Barnes TSX BT, Barnes TSX FB. Powders include IMR, Ramshot, Hodgdon, Vihtavuori, Accurate, Alliant Remarks: maximum load; 57,100 psi; col (inch): 2.775. .257 Roberts +P (Ramshot Data Edition 4.5 - 2011) reloading data with 10 loads. Using bullets from Sierra Hollow Point, Nosler Ballistic Tip, Sierra SPBT. Powders include Ramshot.Jun 27, 2019 · The current SAAMI spec for the .257 Roberts Maximum Average Pressure (MAP) is 54,000 psi. Winchester introduced a +P version with a MAP of 58,000 psi in the mid-1980s. That’s still less than the typical 60,000 to 65,000 psi of comparable modern rifle cartridges. The .257 Roberts was pretty popular for a few years before and after World War II ... The 257 Improved is a fi ne performer, adding up to 100 fps velocity over its factory cousin. One of its advantages, Ackley noted, is the fact that 257 Roberts factory ammunition can be used in an improved rifl e if necessary. Other 25 caliber wildcats are not this fl exible. The 257 Improved is all that the 257 Roberts is—and a bit more.May 19, 2011 ... Again, seated one caliber deep, for an OAL of 2.976", QuickLoad suggests a compressed charge of 56 grains IMR7828, generating just under 47,000 ....257 Roberts (Hodgdon Data - Winchester Powder) reloading data with 14 loads. Using bullets from Hornady SP, Hornady HP, Barnes TTSX BT, Sierra HPBT, Speer SPBT, Nosler Part.IMR-7828. Subscribe. 2,608. Remarks: .257 Roberts Carbine reloading data with 33 loads. Using bullets from Sierra jacketed hollowpoint, Hornady Spire Point, Sierra hollowpoint boat-tail, Nosler Ballistic Tip, Nosler Partition, Sierra spitzer boat-tail, Speer spitzer boat-tail. Powders include Hodgdon, IMR, Alliant, Accurate..257 Roberts Improved (RCBS Version) reloading data with 49 loads. Using bullets from Sierra HP, Sierra spitzer, Hornady SP, Nosler SB, Nosler Partition, Speer HP, Speer SBT, Sierra FB, Hornady HP.*To fire-form brass, use the faster-burning powders and loads from standard .257 Roberts data. *To properly chamber a rifle for .257 Ackley Improved cartridges, a gunsmith must set the original barrel back about 0.004”. The chamber distance from the bolt face to the junction of shoulder and neck is shorter in Ackley Improved rifles than in ...Utah. QuickLOAD agrees with the others that 45.5g is WAY over pressure for the standard 257 Roberts. With a 24" barrel and a COAL of 2.775" the estimated pressure is 67,220 psi with 3,081 fps estimated muzzle velocity. QuickLOAD predicts that 41.5g to be max with that combo (@ 2.775" COAL & 24" barrel) for 2,822 fps.6.5x257 Roberts: Warning! 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 …Warning! Notes: case: Remington; bbl: 24"; pr: Remington 9 1/2; NEVER exceed loads listed. Be Alert: Publisher cannot be responsible for errors in published load data. Wt. .257 Roberts (IMR Data) reloading data with 11 loads. Using bullets from Sierra SP, Sierra Hollow Point Boat Tail. Powders include IMR.4162 posts · Joined 2008. #9 · Apr 29, 2018. I used to have a Parker Hale 1200 rifle that I had re-barreled, with a 22" light weight barrel, to the 6.5 X 257 Roberts. It's been several years since I traded it for another rifle, but I think I …Phone Orders & Customer Service. 1-800-272-3000 | Mon - Fri | 8am to 5pm CST. Pickup Room Hours. Mon - Fri | 8am to 5:30pm CST. Click here for holiday closures. Midsouth Shooters Supply's selection of reloading supplies includes 257 Roberts brass. Build your next load using our 257 Roberts rifle reloading brass.The .257 Roberts is a low recoiling, mild powered cartridge. 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 …Warning! Barrel Length: 24 inches; Primer: Federal 210; Source: Handloader Magazine issue #306 February-March 2017. Be Alert: Publisher cannot be responsible for errors in published load data. Wt. .257 Roberts (using Alliant's RL-16) reloading data with 2 loads. Using bullets from Nosler Ballistic Tip, Hornady SST.Never will understand folks fishing for reloading data on the Internet. There are so many documented loads out there, if you search even a little bit. ... Accuracy has come at the top of the loading charts for my 30.06 with 168g bullets and .257 Roberts with 75g bullets with 760. The sensitivity issue concerns me now that I read about it. I'll ...The .257 Roberts, also known as .257 Bob, [2] is a medium-powered .25 caliber rifle cartridge. It has been described as the best compromise between the low recoil and flat trajectory of smaller calibers such as the 5 mm (.22 in) and 6 mm (.24 in), and has more energy, but is harder recoiling, similar to larger hunting calibers, such as the 7 mm ... *To fire-form brass, use the faster-burning powders and loads from standard .257 Roberts data. *To properly chamber a rifle for .257 Ackley Improved cartridges, a gunsmith must set the original barrel back about 0.004”. The chamber distance from the bolt face to the junction of shoulder and neck is shorter in Ackley Improved rifles than in ... .257 Roberts (Reduced Loads) reloading data with 4 loads. Using bullets from Hornady Flatnose, Sierra ProHunter, Nosler Partition. Powders include IMR, Hodgdon ... .257 Roberts (Reduced Loads) Warning! Gun: Remington 722; Barrel Length: 24 inches; Twist: 1-10; Primer: CCI 200; Case: Remington; Source: Handloader February/March 2017 …Jan 12, 2020 ... The 950 JDJ FAT MAC (The World's Most Powerful Rifle!!!) · 1.4M views ; 35 Whelen loads for a tc compass · 3.5K views ; Well I found some reloade... 120gr. Spitzer. 2.750". 0.391. 0.260. This data was developed to the 257 Roberts +P pressure level of 58,000 psi, and should only be used in modern rearms and +P cases designed for these pressures. He loads for the 25/35 , 250/3000 .257 roberts 25,06 and the .257 weatherby magnum. I have exchanged PMs with John , on the Roberts and the wetherby mag, on a few ocaisions. The data that intrests me in particular, is in The Roberts. (duh , I do call myself TJ Roberts).Well, I'm about three weeks into reloading for the .257 Roberts +P. So far I have three good loads worked up and have loaded but not test-fired another batch. The results so far: Common components. Win brass, CCI 250 primer. 75g Hornady VMAX. COL 2.8025". 42.0g Varget. 3187fps, 7.0fps STD, 16fps E.S.2971. Remarks: max load. .257 Roberts (Berger Bullets Data) reloading data with 38 loads. Using bullets from Berger Match FB Target, Berger Match VLD Target or Match Grade VLD Hunting. Powders include IMR, Hodgdon, Alliant, Accurate, Ramshot, Vihtavuori, Winchester, Norma..257 Roberts +P (Alliant Data) reloading data with 4 loads. Using bullets from Sierra HP, Speer Spitzer, Sierra HPBT. Powders include Alliant ... Be Alert: Publisher cannot be responsible for errors in published load data. Wt. Bullet: Powder Manufacturer: Powder: Charge: Velocity (FPS) 75: Sierra HP: Alliant: RL-15: Subscribe: 3510: Remarks ....257 Roberts Reloading Data (Using Hornady Bullets) reloading data with ….257 Roberts (Reduced Loads) reloading data with 4 loads. Using bullets from Hornady Flatnose, Sierra ProHunter, Nosler Partition. Powders include IMR, HodgdonDec 7, 2007. 465. 330. I have a Remington 722 in .257 Roberts that is grouping (3) 100 gr Nosler Ballistic Tips w/IMR-4350 under .5" @ 100 yards. I tried the same powder with Hornady 117 SST and groups open up to almost 2.0". Is anyone willing to share their load data for .257 Roberts w/115-120gr? .257 Roberts (Cast Bullet Loads) reloading data with 9 loads. Using bullets from Lyman 257463, Lyman 257464, Lyman 257235. Powders include Alliant, IMR Today we're choosing a load and we're going to select our bullet, powder, brass, and primer. And we're not just choosing a load for accuracy but a lot that w... New reloading data must be opened as a PDF document in an up-to-date compatible PDF viewer. For assistance, contact [email protected] or by phone at 800-574-9200. Rifle ... 257 ROBERTS 257 ACKLEY IMPROVED 257 WEATHERBY MAGNUM.264. 6.5 PRC (NEW) 6.5 GRENDEL (NEW) 6.5X55 SWEDISH MAUSER 264 WINCHESTER MAGNUM 6.5 …
Load Data for .257 Roberts . Bullet: 115 gr PART (NOS) Diameter: 0.257" Powder: Hybrid 100V (Hodgdon) Starting Powder: 42.0 gr. Max Powder: 46.0 gr . . Carin leon 2023
Notes from the Lab: .257 Roberts (using Sierra bullets) N.H. “Ned” Roberts developed the .257 Roberts during the 1920s by necking the 7mm Mauser (aka 7x57) case to accept .257-inch bullets and by changing the shoulder angle from 20 ... data is loaded to +P pressures and should only be used in modern actions intended for the increased pressures.The .257 Roberts is a low recoiling, mild powered cartridge. 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 …According to Philip B. Sharpe’s classic book Complete Guide to Handloading (Third Edition, Second Revision), listed the specs for the .257 Roberts were an 87-grain bullet at 3100 fps, a 100-grain bullet at 2800 fps and a 117-grain bullet at 2550 fps. The round nosed 117-grain bullet was a good choice for deer and similar-sized game, but …Date: Feb 11 2014. N.H. "Ned" Roberts developed the .257 Roberts cartridge during the 1920s by necking the 7mm Mauser case to accept .257-inch bullets, and by changing the shoulder angle from 20 to 15 degrees. Roberts was a well-known experimenter and gun writer, and his cartridge became a popular wildcat among custom rifle builders and hunters./r/Reloading is a place for civilized discussions on the topic of Metallic and Shotshell reloading ... Best loads for 257 roberts with 117gr hornady sst h380 powder nosler +p brass and cci LR 200 primers . 10 years ago I made some loads that shot 1moa out of my M77 I lost the load data and am trying to make some loads like that again i have the ...All loads in Winchester Super Speed cases, overall length was 3.015 inches. (Rifle Issue 108 - November, 1986) Be Alert: Publisher cannot be responsible for errors in published load data. Wt. .257 Roberts Ackley Improved reloading data with 13 loads. Using bullets from Sierra, Sierra B.T., Speer. Powders include IMR, Hodgdon, Norma.If you’ve ever had a debit card marked “nonreloadable,” you may wonder what that means. It simply means once the balance has been depleted, you can’t put more money on it. However,...Dec 9, 2015 ... ... 52:10. Go to channel .257 Roberts. Johnny's Reloading Bench•54K views · 32:53. Go to channel · Day 8. Johnny's Reloading Bench•14K views..257" 25 Spitzer BTSP Weight (grains) 120 Ballistic Coefficient 0.480 Sectional Density 0.260 COAL Tested 2.770" Speer Part No. 1410 Propellant Case Primer Weight (grains) Muzzle Velocity (feet/sec) Weight (grains) Alliant Power Pro 4000-MR Federal Federal 210 40.2 2589 44.7 Alliant Reloder 23 Federal Federal 210 41.2 2608 45.8 CWarning! Notes: case: Remington; bbl: 24"; pr: Remington 9 1/2; NEVER exceed loads listed. Be Alert: Publisher cannot be responsible for errors in published load data. Wt. .257 Roberts (IMR Data) reloading data with 11 loads. Using bullets from Sierra SP, Sierra Hollow Point Boat Tail. Powders include IMR.222 Remington Magnum. 22-250 Remington. 223 Remington. 243 Winchester. 25-06 Remington. 257 Roberts +P. 26 Nosler. 260 Remington. 264 Winchester Magnum.Load Data for .257 Roberts . Bullet: 80 gr TTSX BT (Barnes) Diameter: 0.257" Powder: IMR 3031 (Improved Military Rifle) Starting Powder: 36.0 gr. Max Powder: 40.3 gr .Dec 9, 2014 ... 2- Used H4895, which Hodgdon discusses on their site in the reloading data section. Essentially, you can take the max book charge on a given ...1. Never begin loading with the maximum powder charge shown in these reloading data tables, regardless of your experience. 2. Never exceed maximum loads because excessive chamber pressure will result. 3. Discontinue firing at the first sign of excessive pressure or upon noticing a change in the. report of the firearm.Well, I'm about three weeks into reloading for the .257 Roberts +P. So far I have three good loads worked up and have loaded but not test-fired another batch. The results so far: Common components. Win brass, CCI 250 primer. 75g Hornady VMAX. COL 2.8025". 42.0g Varget. 3187fps, 7.0fps STD, 16fps E.S. 6.5x257 Roberts: Warning! 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) The .257 Roberts Improved. The two most popular "Improved" .257 Roberts cartridges are the Ackley and RCBS versions. They are quite similar except for the shoulder angle, which is 40 degrees for the Ackley version and 28 degrees for the RCBS version. The Hornady Handbook and Nosler Reloading Guide show maximum reloads for the .257 Improved ...3071. Remarks: COAL: 2.942 inches; average of three shots (100-yard group): .98 inches. .257 Roberts Ackley Improved (Handloader issue 300) reloading data with 3 loads. Using bullets from Hornady V-Max, Swift Scirocco II, Nosler Partition. Powders include IMR, Hodgdon, Alliant..257" 25 Spitzer SP Hot-Cor® 25 HP 25 Spitzer BTSP Weight (grains) 100 Ballistic Coefficient 0.334 0.263 0.393 Sectional Density 0.1260.216 COAL Tested 2.770"2.760" Speer Part No. 1405 1407 1408 Propellant Case Primer Weight (grains) Muzzle Velocity (feet/sec) Weight (grains) Winchester 760 Winchester CCI 250 41.0 2804 45.0.
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