.256 Winchester Magnum - Manufacturer Loading Data

Bullet
Type
Primer Case Trim
Length
C.O.L. Grains Vel. Press. Diam. Source
    60 gr  FP
(HDY)
 WIN WSR  H110
(Hodgdon)
 WIN  1.271"  1.560" Starting:  15.0 gr       0.257" Hodgdon
Max: 16.0 gr    
    60 gr  FP
(HDY)
 WIN WSR  H4198
(Hodgdon)
 WIN  1.271"  1.560" Starting:          0.257" Hodgdon
Max: 18.0 gr    
    60 gr  FP
(HDY)
 WIN WSR  H4227
(Hodgdon)
 WIN  1.271"  1.560" Starting:  15.0 gr       0.257" Hodgdon
Max: 16.0 gr    
    75 gr  HP
(Speer)
 WIN WSR  H110
(Hodgdon)
 WIN  1.271"  1.740" Starting:  14.0 gr       0.257" Hodgdon
Max: 15.0 gr    
    75 gr  HP
(Speer)
 WIN WSR  H4227
(Hodgdon)
 WIN  1.271"  1.740" Starting:  14.0 gr       0.257" Hodgdon
Max: 15.0 gr    
    87 gr  SP
(HDY)
 WIN WSR  H110
(Hodgdon)
 WIN  1.271"  1.825" Starting:  12.5 gr       0.257" Hodgdon
Max: 13.5 gr    
    87 gr  SP
(HDY)
 WIN WSR  H4198
(Hodgdon)
 WIN  1.271"  1.825" Starting:          0.257" Hodgdon
Max: 15.0 gr    
    87 gr  SP
(HDY)
 WIN WSR  H4227
(Hodgdon)
 WIN  1.271"  1.825" Starting:  13.0 gr       0.257" Hodgdon
Max: 14.0 gr    
Bullet
Type
Primer Case Trim
Length
C.O.L. Grains Vel. Press. Diam. Source
    60 gr  FP
(HDY)
 WIN WSR  1680
(Accurate)
 WIN  1.271"  1.580" Starting:  16.2 gr       0.257" Accurate
Max: 18.0 gr   40,900
    60 gr  FP
(HDY)
 WIN WSR  2015
(Accurate)
 WIN  1.271"  1.580" Starting:  18.0 gr       0.257" Accurate
C 
Max: 20.0 gr   30,600
    60 gr  SP
(HDY)
 WIN WSR  H110
(Hodgdon)
 WIN  1.271"  1.560" Starting:  13.0 gr       0.257" Hodgdon
Max: 14.0 gr    
    60 gr  SP
(HDY)
 WIN WSR  H4198
(Hodgdon)
 WIN  1.271"  1.560" Starting:  17.0 gr       0.257" Hodgdon
Max: 18.0 gr    
    65 gr Lead #257420
(Lyman)
 WIN WSR  1680
(Accurate)
 WIN  1.271"  1.585" Starting:  13.5 gr       0.257" Accurate
Max: 15.0 gr   29,300
    65 gr Lead #257420
(Lyman)
 WIN WSR  2015
(Accurate)
 WIN  1.271"  1.585" Starting:  16.2 gr       0.257" Accurate
C 
Max: 18.0 gr   27,000
    75 gr  FNSP
(Speer)
 WIN WSR  1680
(Accurate)
 WIN  1.271"  1.575" Starting:  14.9 gr       0.257" Accurate
Max: 16.5 gr   37,400
    75 gr  FNSP
(Speer)
 WIN WSR  2015
(Accurate)
 WIN  1.271"  1.575" Starting:  18.0 gr       0.257" Accurate
C 
Max: 20.0 gr   36,100
    75 gr  FP
(Speer)
 WIN WSR  H4198
(Hodgdon)
 WIN  1.271"  1.540" Starting:  14.0 gr       0.257" Hodgdon
Max: 16.0 gr    
    87 gr  SP
(HDY)
 WIN WSR  H4198
(Hodgdon)
 WIN  1.271"  1.775" Starting:  14.0 gr       0.257" Hodgdon
Max: 15.0 gr