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

 

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 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 is Not offered at this time.

 

 

257 Weatherby Magnum
HandLoading & Reloading Components:

 

 

NOSLER BULLETS 

 
 

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 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

 

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