Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 165gr | Nosler Solid Base bullet and 52 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>> | 86% | 54,099 psi | 85% | 3117 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 55,941 psi | 88% | 3281 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 86% | 57,029 psi | 89% | 3287 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 84% | 55,259 psi | 87% | 3209 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 88% | 57,653 psi | 90% | 3287 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 96% | 56,536 psi | 89% | 3261 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 57,232 psi | 90% | 3386 fps | 98.4% |
| ADI AR 2225 | <<locked>> | 98% | 55,506 psi | 87% | 3281 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 54,911 psi | 86% | 3196 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 86% | 54,302 psi | 85% | 3215 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 56,057 psi | 88% | 3179 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 56,652 psi | 89% | 3258 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,913 psi | 89% | 3271 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 54,882 psi | 86% | 3284 fps | 97.7% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 54,607 psi | 86% | 3268 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 54,404 psi | 85% | 3173 fps | 97.7% |
| Bofors RP15 | <<locked>> | 90% | 57,435 psi | 90% | 3268 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 56,420 psi | 88% | 3271 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 54,302 psi | 85% | 3215 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 92% | 54,114 psi | 85% | 3219 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 86% | 56,492 psi | 89% | 3209 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,521 psi | 87% | 3196 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,506 psi | 87% | 3114 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 55,753 psi | 87% | 3350 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,739 psi | 59% | 2090 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,334 psi | 90% | 3182 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,811 psi | 89% | 3186 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 88% | 55,956 psi | 88% | 3264 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 54,491 psi | 85% | 3255 fps | 99.7% |
| Lovex S071 | <<locked>> | 92% | 56,086 psi | 88% | 3146 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 3281 fps | 100% |
| Norma MRP | <<locked>> | 84% | 54,302 psi | 85% | 3232 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,435 psi | 90% | 3294 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 90% | 55,883 psi | 88% | 3212 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,667 psi | 61% | 2136 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 56,869 psi | 89% | 3337 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 56,101 psi | 88% | 3294 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 84% | 55,666 psi | 87% | 3176 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 84% | 54,694 psi | 86% | 3189 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 54,317 psi | 85% | 3186 fps | 99.9% |
| Somchem S361 | <<locked>> | 84% | 57,246 psi | 90% | 3163 fps | 99.4% |
| Somchem S365 | <<locked>> | 82% | 57,682 psi | 90% | 3176 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 54,969 psi | 86% | 3156 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 54,984 psi | 86% | 3140 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 54,302 psi | 85% | 3153 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 84% | 54,317 psi | 85% | 3156 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,682 psi | 90% | 3301 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 90% | 54,984 psi | 86% | 3228 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 94% | 56,536 psi | 89% | 3297 fps | 99% |
| Vihtavuori N570 | <<locked>> | 94% | 53,795 psi | 84% | 3291 fps | 97% |
| Winchester StaBALL HD | <<locked>> | 88% | 56,550 psi | 89% | 3274 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 54,839 psi | 86% | 3150 fps | 99.9% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 44,179 psi | 69% | 2936 fps | 99.9% |
| Accurate High Country | <<locked>> | 80% | 48,617 psi | 76% | 3143 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 80% | 46,064 psi | 72% | 3074 fps | 97.2% |
| ADI AR 2209 | <<locked>> | 80% | 48,298 psi | 76% | 3081 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 80% | 43,453 psi | 68% | 3015 fps | 97.6% |
| ADI AR 2217 | <<locked>> | 82% | 34,722 psi | 54% | 2792 fps | 95% |
| ADI AR 2218 | <<locked>> | 94% | 45,832 psi | 72% | 3140 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 80% | 29,733 psi | 47% | 2684 fps | 95.8% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,051 psi | 75% | 3071 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,222 psi | 69% | 3018 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,033 psi | 67% | 2956 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,304 psi | 58% | 2887 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,921 psi | 77% | 3136 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 47,152 psi | 74% | 3133 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 96% | 46,905 psi | 74% | 3114 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 44,802 psi | 70% | 2982 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 41,220 psi | 65% | 2949 fps | 98% |
| Bofors RP30 | <<locked>> | 80% | 34,737 psi | 54% | 2805 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 44,222 psi | 69% | 3018 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 80% | 35,201 psi | 55% | 2805 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 80% | 46,021 psi | 72% | 3015 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,194 psi | 71% | 2995 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,996 psi | 81% | 3061 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 36,332 psi | 57% | 2927 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,253 psi | 44% | 1870 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,882 psi | 84% | 3123 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,978 psi | 74% | 3005 fps | 98% |
| IMR 7828 SSC | <<locked>> | 80% | 42,192 psi | 66% | 2992 fps | 97.4% |
| IMR 8133 Enduron | <<locked>> | 88% | 36,013 psi | 56% | 2858 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 38,058 psi | 60% | 2802 fps | 99.2% |
| Norma 217 | <<locked>> | 84% | 31,604 psi | 50% | 2753 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 47,137 psi | 74% | 3097 fps | 99.8% |
| Ramshot Grand | <<locked>> | 80% | 42,409 psi | 66% | 3005 fps | 97.8% |
| Ramshot Magnum | <<locked>> | 80% | 38,290 psi | 60% | 2871 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,022 psi | 45% | 1916 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 35,737 psi | 56% | 2894 fps | 98.4% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 41,321 psi | 65% | 2995 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 48,994 psi | 77% | 3051 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 80% | 47,819 psi | 75% | 3061 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,485 psi | 74% | 3058 fps | 99.3% |
| Somchem S361 | <<locked>> | 80% | 50,082 psi | 78% | 3038 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 53,983 psi | 85% | 3120 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 48,153 psi | 75% | 3031 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 80% | 42,076 psi | 66% | 2897 fps | 98.8% |
| Vihtavuori N170 | <<locked>> | 90% | 50,676 psi | 79% | 3087 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 47,674 psi | 75% | 3041 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,746 psi | 73% | 3094 fps | 98% |
| Vihtavuori N565 | <<locked>> | 80% | 38,899 psi | 61% | 2890 fps | 96% |
| Vihtavuori N568 | <<locked>> | 86% | 42,351 psi | 66% | 3015 fps | 95.8% |
| Vihtavuori N570 | <<locked>> | 90% | 46,557 psi | 73% | 3143 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,553 psi | 65% | 3018 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,440 psi | 70% | 2956 fps | 98.8% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 59 powders for .30-378 Weath. Mag. loaded with the .308 | 165gr | Nosler Solid Base. ADI AR 2218 delivers the highest muzzle velocity at 3,386 fps; across all powders the maximum-charge window runs from 2,090 fps to 3,386 fps. Accurate 8700 gives the best case fill at 100 %, and 59 of the 59 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 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2218, Alliant Reloder-50 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.