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

8mm Gibbs Loading Data

8mm Gibbs Loading Data
Warning! Notes: 26-inch barrel, one-in-10-inch twist; all CCI 250 primers; all R-P cases; average weight was 203.1 grains primed; velocities measured on an Oehler Model 33 Chronograph at 10 feet, converted to muzzle velocity; all listed loads should be considered as maximum; reduce the loads shown by at least four grains for starters; work your charge weight of powder up slowly by not more than one grain at a time ("Gibbs' Cartridges and Front Ignition Loading Technique")
Be Alert: Publisher cannot be responsible for errors in published load data.
Wt. Bullet Powder Manufacturer Powder Charge Velocity (FPS)
150 Hornady SP Alliant RL-15 Subscribe 3,346
Remarks: max
150 Hornady SP IMR IMR-4320 Subscribe 3,346
Remarks: max
150 Hornady SP IMR IMR-4064 Subscribe 3,339
Remarks: max
150 Hornady SP Hodgdon H-414 Subscribe 3,285
Remarks: case full
150 Hornady SP Hodgdon H-380 Subscribe 3,274
Remarks: case full
170 Hornady RN Alliant RL-15 Subscribe 3,202
Remarks: max
170 Hornady RN IMR IMR-4320 Subscribe 3,145
Remarks: max
170 Hornady RN Hodgdon H-414 Subscribe 3,132
Remarks: max
170 Hornady RN IMR IMR-4064 Subscribe 3,066
Remarks: max
170 Hornady RN Hodgdon H-380 Subscribe 3,043
Remarks: max
200 Speer SP Hodgdon H-414 Subscribe 2,913
Remarks: max
200 Speer SP IMR IMR-4064 Subscribe 2,895
Remarks: max
200 Speer SP Alliant RL-15 Subscribe 2,888
Remarks: max
200 Speer SP IMR IMR-4320 Subscribe 2,874
Remarks: max
200 Speer SP Hodgdon H-380 Subscribe 2,861
Remarks: max
220 Hornady SP Hodgdon H-414 Subscribe 2,797
Remarks: max
220 Hornady SP IMR IMR-4320 Subscribe 2,761
Remarks: max
220 Hornady SP Alliant RL-15 Subscribe 2,743
Remarks: max
220 Hornady SP IMR IMR-4064 Subscribe 2,720
Remarks: max
220 Hornady SP Hodgdon H-380 Subscribe 2,689
Remarks: max