Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 180gr | Nosler Solid Base bullet and 51 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% | 57,029 psi | 89% | 3048 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 48,399 psi | 76% | 3005 fps | 96.5% |
| Accurate High Country | <<locked>> | 82% | 55,114 psi | 86% | 3153 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 84% | 56,130 psi | 88% | 3163 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 54,201 psi | 85% | 3077 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 56,652 psi | 89% | 3156 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 94% | 55,854 psi | 88% | 3136 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 56,463 psi | 88% | 3264 fps | 98.9% |
| ADI AR 2225 | <<locked>> | 96% | 55,259 psi | 87% | 3159 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 57,421 psi | 90% | 3127 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 57,159 psi | 90% | 3150 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 55,463 psi | 87% | 3051 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 55,999 psi | 88% | 3130 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 56,115 psi | 88% | 3140 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 54,317 psi | 85% | 3169 fps | 98.3% |
| Alliant Reloder-50 | <<locked>> | 98% | 54,331 psi | 85% | 3159 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,985 psi | 89% | 3114 fps | 98.8% |
| Bofors RP15 | <<locked>> | 88% | 56,681 psi | 89% | 3140 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 55,883 psi | 88% | 3150 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 57,159 psi | 90% | 3150 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 57,290 psi | 90% | 3156 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 55,506 psi | 87% | 3084 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 54,505 psi | 85% | 3068 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 90% | 55,405 psi | 87% | 3222 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,942 psi | 59% | 2008 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 55,651 psi | 87% | 3061 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 86% | 55,216 psi | 87% | 3140 fps | 99.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 54,201 psi | 85% | 3136 fps | 99.9% |
| Lovex S071 | <<locked>> | 90% | 55,347 psi | 87% | 3022 fps | 100% |
| Norma 217 | <<locked>> | 98% | 55,724 psi | 87% | 3163 fps | 100% |
| Norma MRP | <<locked>> | 84% | 57,348 psi | 90% | 3166 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 56,536 psi | 89% | 3163 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 55,085 psi | 86% | 3087 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,914 psi | 61% | 2054 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 56,260 psi | 88% | 3209 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 55,608 psi | 87% | 3176 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 54,607 psi | 86% | 3048 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 84% | 57,348 psi | 90% | 3120 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 50,386 psi | 79% | 3018 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,971 psi | 89% | 3114 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,941 psi | 88% | 3038 fps | 99.7% |
| Somchem S385 | <<locked>> | 84% | 57,696 psi | 90% | 3084 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 57,682 psi | 90% | 3071 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 57,116 psi | 90% | 3100 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 84% | 57,203 psi | 90% | 3081 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 56,681 psi | 89% | 3169 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 54,230 psi | 85% | 3104 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 92% | 56,057 psi | 88% | 3182 fps | 99.4% |
| Vihtavuori N570 | <<locked>> | 94% | 57,348 psi | 90% | 3248 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 86% | 56,101 psi | 88% | 3146 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 57,551 psi | 90% | 3081 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 46,673 psi | 73% | 2877 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 44,875 psi | 70% | 2933 fps | 95.4% |
| Accurate High Country | <<locked>> | 80% | 51,474 psi | 81% | 3087 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 80% | 48,675 psi | 76% | 3025 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 80% | 50,705 psi | 79% | 3018 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 45,919 psi | 72% | 2959 fps | 98.9% |
| ADI AR 2217 | <<locked>> | 80% | 34,316 psi | 54% | 2687 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 92% | 45,107 psi | 71% | 3031 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 80% | 31,589 psi | 50% | 2654 fps | 97.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,560 psi | 79% | 3009 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,688 psi | 73% | 2966 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,455 psi | 71% | 2887 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,682 psi | 62% | 2835 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 52,156 psi | 82% | 3077 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 43,323 psi | 68% | 2949 fps | 95.4% |
| Alliant Reloder-50 | <<locked>> | 94% | 46,688 psi | 73% | 3015 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,801 psi | 69% | 2864 fps | 95.9% |
| Bofors RP15 | <<locked>> | 80% | 43,497 psi | 68% | 2897 fps | 99.1% |
| Bofors RP30 | <<locked>> | 80% | 37,101 psi | 58% | 2769 fps | 97% |
| Bofors RP5 | <<locked>> | 80% | 46,688 psi | 73% | 2966 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 80% | 37,275 psi | 58% | 2769 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 80% | 48,385 psi | 76% | 2956 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,500 psi | 74% | 2940 fps | 98.7% |
| Hodgdon Retumbo | <<locked>> | 80% | 38,682 psi | 61% | 2887 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,456 psi | 45% | 1798 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,081 psi | 77% | 2943 fps | 99% |
| IMR 7828 SSC | <<locked>> | 80% | 44,831 psi | 70% | 2946 fps | 98.7% |
| IMR 8133 Enduron | <<locked>> | 84% | 33,576 psi | 53% | 2697 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 40,234 psi | 63% | 2749 fps | 99.8% |
| Norma 217 | <<locked>> | 80% | 29,472 psi | 46% | 2595 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 49,937 psi | 78% | 3041 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 45,281 psi | 71% | 2963 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 80% | 40,756 psi | 64% | 2825 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,254 psi | 46% | 1841 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 38,276 psi | 60% | 2864 fps | 99.6% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 37,985 psi | 60% | 2818 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 51,213 psi | 80% | 2986 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 50,285 psi | 79% | 2999 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 46,978 psi | 74% | 2953 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,937 psi | 78% | 2995 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 52,286 psi | 82% | 2972 fps | 99.3% |
| Somchem S385 | <<locked>> | 80% | 50,546 psi | 79% | 2969 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 44,396 psi | 70% | 2844 fps | 99.6% |
| Vihtavuori N170 | <<locked>> | 88% | 49,850 psi | 78% | 2972 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 80% | 50,227 psi | 79% | 2972 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,429 psi | 77% | 3038 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 80% | 41,263 psi | 65% | 2848 fps | 97.6% |
| Vihtavuori N568 | <<locked>> | 82% | 39,073 psi | 61% | 2835 fps | 95.6% |
| Vihtavuori N570 | <<locked>> | 88% | 46,224 psi | 72% | 3031 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 44,788 psi | 70% | 2963 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,789 psi | 73% | 2900 fps | 99.6% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 58 powders for .30-378 Weath. Mag. loaded with the .308 | 180gr | Nosler Solid Base. ADI AR 2218 delivers the highest muzzle velocity at 3,264 fps; across all powders the maximum-charge window runs from 2,008 fps to 3,264 fps. Accurate 8700 gives the best case fill at 100 %, and 58 of the 58 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 180.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, Hodgdon US 869 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, Hodgdon US 869, Lovex D100, Ramshot LRT 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.