.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  2,264    0.257" Hodgdon
Max: 16.0 gr 2,369  
    60 gr  FP
(HDY)
 WIN WSR  H4198
(Hodgdon)
 WIN  1.271"  1.560" Starting:          0.257" Hodgdon
Max: 18.0 gr 1,704  
    60 gr  FP
(HDY)
 WIN WSR  H4227
(Hodgdon)
 WIN  1.271"  1.560" Starting:  15.0 gr  2,156    0.257" Hodgdon
Max: 16.0 gr 2,386  
    75 gr  HP
(Speer)
 WIN WSR  H110
(Hodgdon)
 WIN  1.271"  1.740" Starting:  14.0 gr  2,115    0.257" Hodgdon
Max: 15.0 gr 2,180  
    75 gr  HP
(Speer)
 WIN WSR  H4227
(Hodgdon)
 WIN  1.271"  1.740" Starting:  14.0 gr  2,026    0.257" Hodgdon
Max: 15.0 gr 2,120  
    87 gr  SP
(HDY)
 WIN WSR  H110
(Hodgdon)
 WIN  1.271"  1.825" Starting:  12.5 gr  1,883    0.257" Hodgdon
Max: 13.5 gr 2,049  
    87 gr  SP
(HDY)
 WIN WSR  H4198
(Hodgdon)
 WIN  1.271"  1.825" Starting:          0.257" Hodgdon
Max: 15.0 gr 2,007  
    87 gr  SP
(HDY)
 WIN WSR  H4227
(Hodgdon)
 WIN  1.271"  1.825" Starting:  13.0 gr  1,798    0.257" Hodgdon
Max: 14.0 gr 2,040  
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  2,423    0.257" Accurate
Max: 18.0 gr 2,753 40,900
    60 gr  FP
(HDY)
 WIN WSR  2015
(Accurate)
 WIN  1.271"  1.580" Starting:  18.0 gr  2,138    0.257" Accurate
C 
Max: 20.0 gr 2,430 30,600
    60 gr  SP
(HDY)
 WIN WSR  H110
(Hodgdon)
 WIN  1.271"  1.560" Starting:  13.0 gr  2,616    0.257" Hodgdon
Max: 14.0 gr 2,724  
    60 gr  SP
(HDY)
 WIN WSR  H4198
(Hodgdon)
 WIN  1.271"  1.560" Starting:  17.0 gr  2,686    0.257" Hodgdon
Max: 18.0 gr 2,794  
    65 gr Lead #257420
(Lyman)
 WIN WSR  1680
(Accurate)
 WIN  1.271"  1.585" Starting:  13.5 gr  2,034    0.257" Accurate
Max: 15.0 gr 2,311 29,300
    65 gr Lead #257420
(Lyman)
 WIN WSR  2015
(Accurate)
 WIN  1.271"  1.585" Starting:  16.2 gr  1,952    0.257" Accurate
C 
Max: 18.0 gr 2,218 27,000
    75 gr  FNSP
(Speer)
 WIN WSR  1680
(Accurate)
 WIN  1.271"  1.575" Starting:  14.9 gr  2,120    0.257" Accurate
Max: 16.5 gr 2,409 37,400
    75 gr  FNSP
(Speer)
 WIN WSR  2015
(Accurate)
 WIN  1.271"  1.575" Starting:  18.0 gr  2,133    0.257" Accurate
C 
Max: 20.0 gr 2,424 36,100
    75 gr  FP
(Speer)
 WIN WSR  H4198
(Hodgdon)
 WIN  1.271"  1.540" Starting:  14.0 gr  2,019    0.257" Hodgdon
Max: 16.0 gr 2,327  
    87 gr  SP
(HDY)
 WIN WSR  H4198
(Hodgdon)
 WIN  1.271"  1.775" Starting:  14.0 gr  2,081    0.257" Hodgdon
Max: 15.0 gr 2,192