.256 Winchester Magnum - Manufacturer Loading Data

Bullet
Type
Primer
Case
Trim
Length
 
Starting
Max
Diam.
Source

 
GR.:  60 gr
Bullet Type:  FP 
(HDY)
Primer: WIN WSR
Powder: H110 
(Hodgdon)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.560"
Powder:
15.0 gr
16.0 gr
Vel.:
2,264
2,369
Press.:
 
 
Starting Powder: 15.0 gr
Starting Velocity: 2,264
Starting Pressure:  
Max Powder: 16.0 gr
Max Velocity: 2,369
Max Pressure:  
Diameter: 0.257"
Source: Hodgdon 

 
GR.:  60 gr
Bullet Type:  FP 
(HDY)
Primer: WIN WSR
Powder: H4198 
(Hodgdon)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.560"
Powder:
 
18.0 gr
Vel.:
 
1,704
Press.:
 
 
Starting Powder:  
Starting Velocity:  
Starting Pressure:  
Max Powder: 18.0 gr
Max Velocity: 1,704
Max Pressure:  
Diameter: 0.257"
Source: Hodgdon 

 
GR.:  60 gr
Bullet Type:  FP 
(HDY)
Primer: WIN WSR
Powder: H4227 
(Hodgdon)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.560"
Powder:
15.0 gr
16.0 gr
Vel.:
2,156
2,386
Press.:
 
 
Starting Powder: 15.0 gr
Starting Velocity: 2,156
Starting Pressure:  
Max Powder: 16.0 gr
Max Velocity: 2,386
Max Pressure:  
Diameter: 0.257"
Source: Hodgdon 

 
GR.:  75 gr
Bullet Type:  HP 
(Speer)
Primer: WIN WSR
Powder: H110 
(Hodgdon)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.740"
Powder:
14.0 gr
15.0 gr
Vel.:
2,115
2,180
Press.:
 
 
Starting Powder: 14.0 gr
Starting Velocity: 2,115
Starting Pressure:  
Max Powder: 15.0 gr
Max Velocity: 2,180
Max Pressure:  
Diameter: 0.257"
Source: Hodgdon 

 
GR.:  75 gr
Bullet Type:  HP 
(Speer)
Primer: WIN WSR
Powder: H4227 
(Hodgdon)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.740"
Powder:
14.0 gr
15.0 gr
Vel.:
2,026
2,120
Press.:
 
 
Starting Powder: 14.0 gr
Starting Velocity: 2,026
Starting Pressure:  
Max Powder: 15.0 gr
Max Velocity: 2,120
Max Pressure:  
Diameter: 0.257"
Source: Hodgdon 

 
GR.:  87 gr
Bullet Type:  SP 
(HDY)
Primer: WIN WSR
Powder: H110 
(Hodgdon)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.825"
Powder:
12.5 gr
13.5 gr
Vel.:
1,883
2,049
Press.:
 
 
Starting Powder: 12.5 gr
Starting Velocity: 1,883
Starting Pressure:  
Max Powder: 13.5 gr
Max Velocity: 2,049
Max Pressure:  
Diameter: 0.257"
Source: Hodgdon 

 
GR.:  87 gr
Bullet Type:  SP 
(HDY)
Primer: WIN WSR
Powder: H4198 
(Hodgdon)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.825"
Powder:
 
15.0 gr
Vel.:
 
2,007
Press.:
 
 
Starting Powder:  
Starting Velocity:  
Starting Pressure:  
Max Powder: 15.0 gr
Max Velocity: 2,007
Max Pressure:  
Diameter: 0.257"
Source: Hodgdon 

 
GR.:  87 gr
Bullet Type:  SP 
(HDY)
Primer: WIN WSR
Powder: H4227 
(Hodgdon)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.825"
Powder:
13.0 gr
14.0 gr
Vel.:
1,798
2,040
Press.:
 
 
Starting Powder: 13.0 gr
Starting Velocity: 1,798
Starting Pressure:  
Max Powder: 14.0 gr
Max Velocity: 2,040
Max Pressure:  
Diameter: 0.257"
Source: Hodgdon 

Bullet
Type
Primer
Case
Trim
Length
 
Starting
Max
Diam.
Source

 
GR.:  60 gr
Bullet Type:  FP 
(HDY)
Primer: WIN WSR
Powder: 1680 
(Accurate)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.580"
Powder:
16.2 gr
18.0 gr
Vel.:
2,423
2,753
Press.:
 
40,900
Starting Powder: 16.2 gr
Starting Velocity: 2,423
Starting Pressure:  
Max Powder: 18.0 gr
Max Velocity: 2,753
Max Pressure: 40,900
Diameter: 0.257"
Source: Accurate 

 
GR.:  60 gr
Bullet Type:  FP 
(HDY)
Primer: WIN WSR
Powder: 2015 
(Accurate)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.580"
Powder:
18.0 gr
20.0 gr
Vel.:
2,138
2,430
Press.:
 
30,600
Starting Powder: 18.0 gr
Starting Velocity: 2,138
Starting Pressure:  
Max Powder: 20.0 gr
Max Velocity: 2,430
Max Pressure: 30,600
Diameter: 0.257"
Source: Accurate 
C 

 
GR.:  60 gr
Bullet Type:  SP 
(HDY)
Primer: WIN WSR
Powder: H110 
(Hodgdon)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.560"
Powder:
13.0 gr
14.0 gr
Vel.:
2,616
2,724
Press.:
 
 
Starting Powder: 13.0 gr
Starting Velocity: 2,616
Starting Pressure:  
Max Powder: 14.0 gr
Max Velocity: 2,724
Max Pressure:  
Diameter: 0.257"
Source: Hodgdon 

 
GR.:  60 gr
Bullet Type:  SP 
(HDY)
Primer: WIN WSR
Powder: H4198 
(Hodgdon)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.560"
Powder:
17.0 gr
18.0 gr
Vel.:
2,686
2,794
Press.:
 
 
Starting Powder: 17.0 gr
Starting Velocity: 2,686
Starting Pressure:  
Max Powder: 18.0 gr
Max Velocity: 2,794
Max Pressure:  
Diameter: 0.257"
Source: Hodgdon 

 
GR.:  65 gr
Bullet Type:  Lead  #257420 
(Lyman)
Primer: WIN WSR
Powder: 1680 
(Accurate)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.585"
Powder:
13.5 gr
15.0 gr
Vel.:
2,034
2,311
Press.:
 
29,300
Starting Powder: 13.5 gr
Starting Velocity: 2,034
Starting Pressure:  
Max Powder: 15.0 gr
Max Velocity: 2,311
Max Pressure: 29,300
Diameter: 0.257"
Source: Accurate 

 
GR.:  65 gr
Bullet Type:  Lead  #257420 
(Lyman)
Primer: WIN WSR
Powder: 2015 
(Accurate)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.585"
Powder:
16.2 gr
18.0 gr
Vel.:
1,952
2,218
Press.:
 
27,000
Starting Powder: 16.2 gr
Starting Velocity: 1,952
Starting Pressure:  
Max Powder: 18.0 gr
Max Velocity: 2,218
Max Pressure: 27,000
Diameter: 0.257"
Source: Accurate 
C 

 
GR.:  75 gr
Bullet Type:  FNSP 
(Speer)
Primer: WIN WSR
Powder: 1680 
(Accurate)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.575"
Powder:
14.9 gr
16.5 gr
Vel.:
2,120
2,409
Press.:
 
37,400
Starting Powder: 14.9 gr
Starting Velocity: 2,120
Starting Pressure:  
Max Powder: 16.5 gr
Max Velocity: 2,409
Max Pressure: 37,400
Diameter: 0.257"
Source: Accurate 

 
GR.:  75 gr
Bullet Type:  FNSP 
(Speer)
Primer: WIN WSR
Powder: 2015 
(Accurate)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.575"
Powder:
18.0 gr
20.0 gr
Vel.:
2,133
2,424
Press.:
 
36,100
Starting Powder: 18.0 gr
Starting Velocity: 2,133
Starting Pressure:  
Max Powder: 20.0 gr
Max Velocity: 2,424
Max Pressure: 36,100
Diameter: 0.257"
Source: Accurate 
C 

 
GR.:  75 gr
Bullet Type:  FP 
(Speer)
Primer: WIN WSR
Powder: H4198 
(Hodgdon)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.540"
Powder:
14.0 gr
16.0 gr
Vel.:
2,019
2,327
Press.:
 
 
Starting Powder: 14.0 gr
Starting Velocity: 2,019
Starting Pressure:  
Max Powder: 16.0 gr
Max Velocity: 2,327
Max Pressure:  
Diameter: 0.257"
Source: Hodgdon 

 
GR.:  87 gr
Bullet Type:  SP 
(HDY)
Primer: WIN WSR
Powder: H4198 
(Hodgdon)
Case: WIN
Trim Length: 1.271"
C.O.L.: 1.775"
Powder:
14.0 gr
15.0 gr
Vel.:
2,081
2,192
Press.:
 
 
Starting Powder: 14.0 gr
Starting Velocity: 2,081
Starting Pressure:  
Max Powder: 15.0 gr
Max Velocity: 2,192
Max Pressure:  
Diameter: 0.257"
Source: Hodgdon