8mm Gibbs Loading Data |
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| 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 | ||||||




