256 Winchester Magnum


Firearm :
Barrel :
Twist:
Optics:
Distance :
Shots :
Bullet Type :
Bullet Diam :
Bullet Mfg :
Marlin 1894sc
22"
1:16"
24X
50y
10
75gr FNC
.257"
Speer

Powder Weight /Velocity Data for the 75gr Speer FNC

 PW vs Vel graph for 256 Win Mag with 
75gr Speer FNC
Graph produced by "RCBS.Load"

 

GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data

                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 44       OAL: 1.575"
        PT          PW   Vel   SD   GS 
AA1680 12.5 1906.2 47.7 3.2
  13.5 2006.8 18.2 1.20
  14.5 2116.8 44.8 2.5
  15.5 2226.6 28.4 2.1
  16.5 2339.5 17.2 2.0
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 50       OAL: 1.575"
        PT          PW   Vel   SD   GS 
AA2015 15.0 1709.8 11.4 1.44
  16.0 1839.9 10.0 1.72
  17.0 2015.8 18.5 2.0
  18.0 2127.2 23.5 1.13
  19.0 2260.8 21.4 2.3
 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 50       OAL: 1.575"
        PT          PW   Vel   SD   GS 
BlueDot 7.0 1504.4 27.6 2.1
  8.0 1674.7 27.9 1.01
  9.0 1835.8 21.6 2.0
  10.0 1948.2 41.1 2.6
  11.0 2044.1 32.7 1.61
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 48       OAL: 1.575"
        PT          PW   Vel   SD   GS 
BnchMrk 13.0 1504.0 43.2 2.0
  14.0 1626.7 15.3 1.11
  15.0 1752.0 29.1 1.02
  16.0 1878.8 24.2 2.3
  17.0 2005.3 29.0 2.0
 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 50       OAL: 1.575"
        PT          PW   Vel   SD   GS 
H110 10.0 1463.3 29.7 1.24
  11.0 1578.4 12.7 1.61
  12.0 1755.3 28.6 1.49
  13.0 1894.4 20.2 2.3
  14.0 2090.5 35.4 2.1
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 50       OAL: 1.575"
        PT          PW   Vel   SD   GS 
H322 15.0 1599.7 17.9 1.52
  16.0 1758.0 30.0 1.18
  17.0 1933.6 33.4 2.8
  18.0 2067.8 20.6 1.56
  19.0 2189.6 19.6 2.1
 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 54       OAL: 1.575"
        PT          PW   Vel   SD   GS 
H335 17.0 1781.5 4.7 1.18
  18.0 1861.2 12.9 1.64
  19.0 1994.4 21.8 1.34
  20.0 2118.9 9.4 1.39
  21.0 2212.5 23.8 1.21
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 48       OAL: 1.575"
        PT          PW   Vel   SD   GS 
H4198 12.0 1726.2 37.4 1.56
  13.0 1863.2 39.8 2.1
  14.0 2009.8 18.6 2.0
  15.0 2156.5 23.1 2.1
  16.0 2293.2 26.0 1.72
 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 56       OAL: 1.575"
        PT          PW   Vel   SD   GS 
I4198 12.0 1494.3 25.1 1.56
  13.0 1698.5 25.6 1.82
  14.0 1891.9 40.8 2.9
  15.0 2077.5 30.2 2.6
  16.0 2288.4 32.7 1.81
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 56       OAL: 1.575"
        PT          PW   Vel   SD   GS 
I4227 11.0 1585.1 31.8 1.50
  12.0 1754.2 26.1 2.7
  13.0 1894.7 42.6 3.9
  14.0 2070.6 34.5 3.9
  15.0 2233.6 28.3 1.86
 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 52       OAL: 1.575"
        PT          PW   Vel   SD   GS 
RL10 15.0 1814.6 23.9 1.84
  16.0 1916.1 18.6 1.42
  17.0 2056.6 15.8 1.85
  18.0 2186.0 23.9 1.45
  19.0 2312.9 18.0 1.32
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 52       OAL: 1.575"
        PT          PW   Vel   SD   GS 
RL12 15.0 1379.8 38.0 1.05
  16.0 1523.6 22.0 1.26
  17.0 1699.4 41.9 4.1
  18.0 1852.8 26.3 1.47
  19.0 1986.6 30.6 2.9
 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 50       OAL: 1.575"
        PT          PW   Vel   SD   GS 
RL7 13.0 1658.0 41.0 3
  14.0 1784.1 32.8 2.9
  15.0 1946.6 22.9 2.6
  16.0 2135.5 25.3 1.58
  17.0 2299.9 13.2 2.1
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 50       OAL: 1.575"
        PT          PW   Vel   SD   GS 
Varget 15.0 1255.8 30.7 .89
  16.0 1400.5 41.5 2.1
  17.0 1572.0 28.2 2.5
  18.0 1722.9 24.7 1.19
  19.0 1849.8 27.6 3.5
 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 50       OAL: 1.575"
        PT          PW   Vel   SD   GS 
VVn110 8.0 1123.2 55.0 1.33
  9.0 1443.5 40.7 1.58
  10.0 1665.1 25.4 1.55
  11.0 1875.9 25.1 2.5
  12.0 2061.1 25.6 1.55
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 48       OAL: 1.575"
        PT          PW   Vel   SD   GS 
VVn130 13.0 1817.6 32.7 .98
  13.5 1888.6 34.3 1.74
  14.0 1932.2 24.7 .99
  14.5 1988.5 35.5 1.65
  15.0 2059.4 32.7 1.55
 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 48       OAL: 1.575"
        PT          PW   Vel   SD   GS 
VVn133 12.0 1442.0 34.5 3
  13.0 1581.2 31.8 1.79
  14.0 1727.7 20.1 .93
  15.0 1849.0 42.2 2.6
  16.0 1995.1 40.8 2.9
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 48       OAL: 1.575"
        PT          PW   Vel   SD   GS 
VVn135 13.0 1479.4 25.1 2.9
  14.0 1638.2 46.1 2.6
  15.0 1787.3 51.6 1.87
  16.0 1900.9 37.3 1.58
  17.0 2049.4 51.2 1.87
 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 54       OAL: 1.575"
        PT          PW   Vel   SD   GS 
VVn350 6.0 1148.8 44.6 .95
  7.0 1324.2 42.4 1.78
  8.0 1537.2 29.2 5
  9.0 1750.7 26.6 1.95
  10.0 1955.8 17.4 2.4
 
                        256 Winchester Magnum                         75gr    FNC
PR: WSR       CM: Win       TempF: 56       OAL: 1.575"
        PT          PW   Vel   SD   GS 
W296 10.0 1596.3 35.3 2.7
  11.0 1676.3 41.8 2.0
  12.0 1821.3 13.8 2.2
  13.0 1974.9 16.8 3.8
  14.0 2117.4 29.9 3.2
 
GMDR assumes NO liability for mishaps of any kind resulting from the use or misuse of this data
 

Group Size vs Velocity Plot for the 75gr Speer FNC
 
 Group Size graph for 256 Win Mag with 75gr Speer FNC

 

Graph produced by "RCBS.Load"