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The Ultimate Reloading Manual
Wolfe Publishing Group
  • reloading manual
  • alliant reloading data
  • reloading brass
  • shotshell reloading
  • bullet reloading
The Ultimate Reloading Manual

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.256-06 Improved / 6.5mm-06 Improved (P.O. Ackley Data)

.256-06 Improved / 6.5mm-06 Improved (P.O. Ackley Data)
Warning! Notes: Standard twist: 10". Special twist: 12", 14". The 6.5mm-06 Improved, sometimes called the .256-06 Improved is obviously not as efficient as the standard 6.5mm-06 which tends to indicate that the maximum efficient case capacity has been reached and that the 6.5mm-06 Improved is somewhat over bore capacity thus resulting in not quite as efficient cartridge as the standard version. The following loads bear this out because these were made in the same barrel, by first chambering the barrel for the standard 6.5mm-06, then later it was rechambered for the "improved" version so that a good comparison was obtained for the two cartridges in the same barrel. (Handbook for Shooters & Reloaders/Vol. 1 - P.O. Ackley, 1962) NOTE: USE THIS DATA WITH EXTREME CAUTION
Be Alert: Publisher cannot be responsible for errors in published load data.
Wt. Bullet Powder Manufacturer Powder Charge Velocity (FPS)
120 IMR IMR-4350 Subscribe 3100
Remarks:
120 IMR IMR-4350 Subscribe 3275
Remarks:
140 IMR IMR-4350 Subscribe 2920
Remarks:
140 IMR IMR-4350 Subscribe 3095
Remarks:
140 IMR IMR-4831 Subscribe 2950
Remarks:
140 IMR IMR-4831 Subscribe 3065
Remarks:
150 IMR IMR-4350 Subscribe 2780
Remarks:
150 IMR IMR-4350 Subscribe 2915
Remarks:
150 IMR IMR-4831 Subscribe 2760
Remarks:
150 IMR IMR-4831 Subscribe 2915
Remarks:
165 IMR IMR-4350 Subscribe 2550
Remarks:
165 IMR IMR-4350 Subscribe 2600
Remarks:
165 IMR IMR-4831 Subscribe 2550
Remarks:
165 IMR IMR-4831 Subscribe 2650
Remarks: