257 Roberts & 
257 Roberts +P
Rifle Cartridge

Abbreviated Name:  257 Rob / 257 Rob +P

 
 

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.  Use only in firearms especially designed for this cartridge and so recommended by the manufacturer.  

The 257 Roberts is one of two .25 caliber cartridges used for daily production testing in the Nosler Ballistics Lab. Either the 100 gr. Ballistic Tip, 100 gr. Partition, or the 110 gr. AccuBond would be our pick for deer-sized game. IMR 4350 is an excellent powder for our hunting weight bullets. For varmints, our 85 grain Ballistic Tip works very well with faster powders such as RL15 and H380.

 

 

NOSLER AMMUNITION

Loaded for 257 Roberts

NOSLERCUSTOM 257 Roberts AMMUNITION

 
 

257 Roberts +P 100 Grain
Information  |  Ballistics 

Bullet Style:  Ballistic Tip Hunting
Use:  Deer Sized Game


257 Roberts +P 100 Grain
Information  |  Ballistics 

Bullet Style:  Partition
Use:  Deer Sized Game


257 Roberts +P 115 Grain
Information  |  Ballistics 

Bullet Style:  Ballistic Tip Hunting
Use:  Deer Sized Game

 

 

TROPHY GRADE 257 Roberts AMMUNITION

 

257 Roberts +P 110 Grain
Information  |  Ballistics  

Bullet Style:  AccuBond
Use:  Deer Sized Game

 

 

NOSLER RIFLES

Chambered for 257 Roberts +P

 

BUILD A M48 CUSTOM 257 Roberts +P RIFLE

Information  |  Build  |  FAQ

Top of the line performance matched with a top notch customization features.

 

 

257 Roberts
Loading & Reloading Components:

257 Roberts LOAD DATA

 

 

NOSLER BULLETS 

Designed for Loading & Reloading 257 Roberts

 
 

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 Roberts

 

257 ROBERTS +P BRASS

Part# 10135
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