257 Weatherby Magnum
Rifle Cartridge

Abbreviated Name:  257 Wby Mag

 
 

TECHNICAL INFORMATION:

As with most Weatherby Magnum’s, there are a few points to keep in mind when loading this cartridge.

  • The chambers have “freebore”, meaning they have a longer throat. For this reason, it is generally not possible to seat a bullet close to, or in contact with the lands (rifling).
  • For best accuracy, bullets should be seated as long as the magazine will allow. 
  • Weatherby rifles of German manufacture (pre-1972) may have barrels with 1-12” twist rates. These rifles will not reliably stabilize bullets larger than 100 grains.

 

 

 

NOSLER AMMUNITION

Loaded for 257 Weatherby Magnum

 

NOSLERCUSTOM 257 WEATHERBY MAGNUM AMMUNITION

 

257 Weatherby Magnum 100 Grain
Information  |  Ballistics  

Bullet Style:  E-Tip
Use:  Deer Sized Game


257 Weatherby Magnum 100 Grain
Information  |  Ballistics  

Bullet Style:  Ballistic Tip Hunting
Use:  Deer Sized Game


257 Weatherby Magnum 110 Grain
Information  |  Ballistics  

Bullet Style:  AccuBond
Use:  Deer Sized Game


257 Weatherby Magnum 115 Grain
Information  |  Ballistics 

Bullet Style:  Ballistic Tip Hunting
Use:  Deer Sized Game


257 Weatherby Magnum 115 Grain
Information  |  Ballistics 

Bullet Style:  Partition
Use:  Deer Sized Game


257 Weatherby Magnum 120 Grain
Information  |  Ballistics  

Bullet Style:  Partition
Use:  Deer Sized Game

 

 

Trophy Grade 257 WEATHERBY MAGNUM AMMUNITION

 

257 Weatherby Magnum 110 Grain
Information  |  Ballistics  

Bullet Style:  AccuBond
Use:  Deer Sized Game

 

 

NOSLER RIFLES

Chambered for 257 Weatherby Magnum

Not offered at this time

 

 

257 Weatherby Magnum
Loading & Reloading Components:

257 WBY MAG LOAD DATA

 

 

NOSLER BULLETS 

Designed for Loading & Reloading 257 Weatherby Magnum

 
 

AccuBond Bullet 

  • 25 Caliber 110 Grain

Ballistic Tip Hunting Bullet

  • 25 Caliber 90 Grain
  • 25 Caliber 115 Grain

Ballistic Tip Varmint Bullet

  • 25 Caliber 85 Grain
 
 

CT Ballistic Silvertip Bullet

  • 25 Caliber 85 Grain
  • 25 Caliber 115 Grain

E-Tip Bullet

  • 25 Caliber 100 Grain

Partition Bullet

  • 25 Caliber 100 Grain
  • 25 Caliber 115 Grain
  • 25 Caliber 120 Grain
 

 

NOSLER BRASS

Designed for Loading & Reloading 257 Weatherby Magnum Brass

 

257 WBY MAG BRASS

Part# 10138
Box Count: 50 

 

 

Available Cartridge Information:

 

RIFLE CARTRIDGES

 

35 Caliber / .358” Diameter

9.3mm Caliber / .366” Diameter

375 Caliber / .375” Diameter

416 Caliber / .416” Diameter

44 Caliber / .429” Diameter

45 Caliber / .458” Diameter

458 Caliber / .458” Diameter

 

 

HANDGUN CARTRIDGES

 

9mm Caliber / .355” Diameter

38 Caliber / .357” Diameter

10MM Caliber / .400” Diameter

41 Caliber / .410” Diameter

44 Caliber / .429” Diameter

45 Caliber / .451” Diameter