Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 165gr | CutEdge MTH bullet and 56 powders. The key underlying parameters are shown in the table above.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 55,564 psi | 87% | 3143 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 53,766 psi | 84% | 3245 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 86% | 54,897 psi | 86% | 3255 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 86% | 57,276 psi | 90% | 3248 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 55,695 psi | 87% | 3258 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 96% | 54,389 psi | 85% | 3228 fps | 99.8% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 3343 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,261 psi | 90% | 3314 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,276 psi | 90% | 3232 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,768 psi | 89% | 3232 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,057 psi | 88% | 3251 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 54,099 psi | 85% | 3153 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 54,505 psi | 85% | 3228 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 54,520 psi | 85% | 3241 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,565 psi | 89% | 3320 fps | 98% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 51,822 psi | 81% | 3219 fps | 96.4% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,550 psi | 89% | 3215 fps | 98.1% |
| Bofors RP15 | <<locked>> | 90% | 55,419 psi | 87% | 3238 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 54,230 psi | 85% | 3241 fps | 99.7% |
| Bofors RP5 | <<locked>> | 88% | 56,057 psi | 88% | 3251 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 56,014 psi | 88% | 3255 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 54,810 psi | 86% | 3186 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,537 psi | 90% | 3232 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,377 psi | 90% | 3143 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,450 psi | 90% | 3383 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,507 psi | 59% | 2083 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,695 psi | 87% | 3159 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,231 psi | 88% | 3159 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,274 psi | 87% | 3166 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 88% | 54,099 psi | 85% | 3235 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,083 psi | 82% | 3215 fps | 99.5% |
| Lovex S071 | <<locked>> | 94% | 57,305 psi | 90% | 3169 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,043 psi | 89% | 3222 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 53,287 psi | 84% | 3245 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,188 psi | 88% | 3268 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,245 psi | 87% | 3261 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 57,000 psi | 89% | 3215 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 53,693 psi | 84% | 3179 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,522 psi | 60% | 2133 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 54,389 psi | 85% | 3304 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 53,635 psi | 84% | 3255 fps | 99% |
| Rottweil R 904 | <<locked>> | 86% | 57,667 psi | 90% | 3212 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 86% | 56,521 psi | 89% | 3225 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,130 psi | 88% | 3219 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 55,506 psi | 87% | 3140 fps | 99.2% |
| Somchem S365 | <<locked>> | 82% | 55,608 psi | 87% | 3153 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,666 psi | 89% | 3186 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 56,869 psi | 89% | 3173 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 55,912 psi | 88% | 3186 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 86% | 55,724 psi | 87% | 3182 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,666 psi | 87% | 3271 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 92% | 56,449 psi | 88% | 3255 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 94% | 54,230 psi | 85% | 3261 fps | 98.7% |
| Vihtavuori N570 | <<locked>> | 96% | 55,535 psi | 87% | 3330 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 88% | 53,809 psi | 84% | 3241 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,811 psi | 89% | 3186 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 42,177 psi | 66% | 2900 fps | 99.7% |
| Accurate High Country | <<locked>> | 80% | 46,644 psi | 73% | 3107 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 80% | 44,019 psi | 69% | 3035 fps | 96.6% |
| ADI AR 2209 | <<locked>> | 80% | 46,601 psi | 73% | 3051 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 80% | 41,858 psi | 66% | 2982 fps | 97.1% |
| ADI AR 2217 | <<locked>> | 84% | 35,520 psi | 56% | 2818 fps | 95.3% |
| ADI AR 2218 | <<locked>> | 96% | 47,195 psi | 74% | 3176 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 82% | 30,240 psi | 47% | 2707 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,519 psi | 84% | 3173 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,499 psi | 73% | 3041 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,496 psi | 67% | 2986 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,104 psi | 64% | 2923 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,491 psi | 56% | 2848 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,760 psi | 73% | 3104 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 48,486 psi | 76% | 3166 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 98% | 47,950 psi | 75% | 3143 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 46,369 psi | 73% | 3018 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 39,421 psi | 62% | 2913 fps | 97.5% |
| Bofors RP30 | <<locked>> | 82% | 35,375 psi | 55% | 2831 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 42,496 psi | 67% | 2986 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 80% | 33,692 psi | 53% | 2769 fps | 95.1% |
| Hodgdon H4831 | <<locked>> | 80% | 44,353 psi | 70% | 2982 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,671 psi | 68% | 2969 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,285 psi | 79% | 3035 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 34,664 psi | 54% | 2884 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,152 psi | 44% | 1867 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,243 psi | 82% | 3100 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 52,649 psi | 83% | 3104 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,469 psi | 71% | 2979 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 80% | 40,538 psi | 64% | 2959 fps | 96.8% |
| IMR 8133 Enduron | <<locked>> | 90% | 36,637 psi | 57% | 2881 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 36,100 psi | 57% | 2762 fps | 98.7% |
| Norma 204 | <<locked>> | 80% | 53,258 psi | 83% | 3156 fps | 99.7% |
| Norma 217 | <<locked>> | 86% | 31,894 psi | 50% | 2766 fps | 96% |
| Norma MRP | <<locked>> | 80% | 45,179 psi | 71% | 3064 fps | 99.6% |
| Ramshot Grand | <<locked>> | 80% | 40,524 psi | 64% | 2969 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 80% | 53,258 psi | 83% | 3153 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,303 psi | 57% | 2828 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,877 psi | 45% | 1913 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 33,924 psi | 53% | 2851 fps | 97.7% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 39,160 psi | 61% | 2949 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 47,340 psi | 74% | 3022 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 80% | 45,992 psi | 72% | 3031 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,658 psi | 72% | 3025 fps | 99% |
| Somchem S361 | <<locked>> | 80% | 48,370 psi | 76% | 3009 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 51,938 psi | 81% | 3094 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,427 psi | 73% | 3005 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 80% | 40,466 psi | 63% | 2867 fps | 98.4% |
| Vihtavuori N170 | <<locked>> | 92% | 52,214 psi | 82% | 3120 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 80% | 45,527 psi | 71% | 3009 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,918 psi | 70% | 3061 fps | 97.5% |
| Vihtavuori N565 | <<locked>> | 80% | 36,927 psi | 58% | 2844 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 88% | 43,511 psi | 68% | 3045 fps | 96.1% |
| Vihtavuori N570 | <<locked>> | 92% | 47,819 psi | 75% | 3176 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,262 psi | 62% | 2976 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,714 psi | 67% | 2927 fps | 98.4% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 63 powders for .30-378 Weath. Mag. loaded with the .308 | 165gr | CutEdge MTH. Hodgdon Retumbo delivers the highest muzzle velocity at 3,383 fps; across all powders the maximum-charge window runs from 2,083 fps to 3,383 fps. Accurate 8700 gives the best case fill at 100 %, and 63 of the 63 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2218, ADI AR 2225 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. As outliers, Accurate 8700, IMR 7977 Enduron, Lovex D100 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.