Load Specifications
Load data in caliber .30-378 Weath. Mag. with .311 | 180gr | Norma Semi Soft Point bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Vihtavuori N570 and Hodgdon Retumbo.
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>> | 84% | 54,433 psi | 85% | 3009 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 49,821 psi | 78% | 3028 fps | 96.9% |
| Accurate High Country | <<locked>> | 82% | 56,347 psi | 88% | 3173 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 84% | 57,450 psi | 90% | 3182 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 82% | 55,245 psi | 87% | 3097 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 54,128 psi | 85% | 3114 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 94% | 57,363 psi | 90% | 3159 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 53,824 psi | 84% | 3219 fps | 98.6% |
| ADI AR 2225 | <<locked>> | 96% | 56,768 psi | 89% | 3179 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 55,448 psi | 87% | 3091 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 54,897 psi | 86% | 3084 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 54,752 psi | 86% | 3110 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 56,739 psi | 89% | 3071 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 57,392 psi | 90% | 3146 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 57,624 psi | 90% | 3159 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 55,985 psi | 88% | 3199 fps | 98.6% |
| Alliant Reloder-50 | <<locked>> | 98% | 55,898 psi | 88% | 3186 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 54,375 psi | 85% | 3071 fps | 98.5% |
| Bofors RP15 | <<locked>> | 86% | 54,143 psi | 85% | 3097 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 57,363 psi | 90% | 3173 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 54,752 psi | 86% | 3110 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 54,781 psi | 86% | 3117 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 56,623 psi | 89% | 3104 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 55,622 psi | 87% | 3087 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 90% | 56,956 psi | 89% | 3248 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,927 psi | 59% | 2014 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,695 psi | 89% | 3081 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 86% | 56,463 psi | 88% | 3159 fps | 100% |
| IMR 8133 Enduron | <<locked>> | 98% | 55,767 psi | 87% | 3163 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 56,536 psi | 89% | 3038 fps | 100% |
| Norma 217 | <<locked>> | 98% | 57,232 psi | 90% | 3186 fps | 100% |
| Norma MRP | <<locked>> | 82% | 54,752 psi | 86% | 3120 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 53,969 psi | 85% | 3120 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 56,536 psi | 89% | 3110 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,015 psi | 61% | 2060 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 53,650 psi | 84% | 3163 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 57,145 psi | 90% | 3202 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 82% | 55,593 psi | 87% | 3064 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 54,766 psi | 86% | 3077 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 51,779 psi | 81% | 3045 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 54,404 psi | 85% | 3074 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,884 psi | 89% | 3054 fps | 99.8% |
| Somchem S385 | <<locked>> | 82% | 54,998 psi | 86% | 3045 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 55,187 psi | 86% | 3035 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 54,476 psi | 85% | 3058 fps | 97% |
| Vihtavuori N555 | <<locked>> | 82% | 54,752 psi | 86% | 3045 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 54,114 psi | 85% | 3123 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 88% | 55,477 psi | 87% | 3123 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 92% | 57,421 psi | 90% | 3202 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 92% | 54,853 psi | 86% | 3202 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 86% | 57,696 psi | 90% | 3163 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 54,824 psi | 86% | 3041 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 47,543 psi | 75% | 2894 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 46,224 psi | 72% | 2959 fps | 95.9% |
| Accurate High Country | <<locked>> | 80% | 52,533 psi | 82% | 3107 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 80% | 49,821 psi | 78% | 3048 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 80% | 51,634 psi | 81% | 3035 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 46,949 psi | 74% | 2982 fps | 99.1% |
| ADI AR 2217 | <<locked>> | 80% | 35,056 psi | 55% | 2707 fps | 96.4% |
| ADI AR 2218 | 109.6 gr | 90% | 43,091 psi | 68% | 2982 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 32,387 psi | 51% | 2677 fps | 98.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 51,909 psi | 81% | 3031 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 51,416 psi | 81% | 3025 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 47,718 psi | 75% | 2986 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 46,557 psi | 73% | 2907 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 40,611 psi | 64% | 2854 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 53,447 psi | 84% | 3097 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 44,614 psi | 70% | 2976 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 92% | 44,715 psi | 70% | 2966 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,701 psi | 70% | 2884 fps | 96.3% |
| Bofors RP15 | <<locked>> | 80% | 44,396 psi | 70% | 2913 fps | 99.3% |
| Bofors RP30 | <<locked>> | 80% | 37,956 psi | 59% | 2789 fps | 97.4% |
| Bofors RP5 | <<locked>> | 80% | 47,718 psi | 75% | 2986 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 80% | 38,159 psi | 60% | 2789 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 80% | 49,327 psi | 77% | 2976 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 80% | 48,457 psi | 76% | 2959 fps | 98.9% |
| Hodgdon Retumbo | 91.9 gr | 80% | 39,711 psi | 62% | 2913 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,500 psi | 45% | 1804 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,850 psi | 78% | 2956 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 80% | 45,745 psi | 72% | 2963 fps | 98.9% |
| IMR 8133 Enduron | <<locked>> | 84% | 34,505 psi | 54% | 2717 fps | 95.9% |
| Lovex S071 | <<locked>> | 80% | 41,104 psi | 64% | 2769 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 30,298 psi | 47% | 2615 fps | 96.4% |
| Norma MRP | <<locked>> | 80% | 50,995 psi | 80% | 3058 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 46,398 psi | 73% | 2982 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 80% | 41,858 psi | 66% | 2848 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,298 psi | 46% | 1847 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 39,334 psi | 62% | 2887 fps | 99.8% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 36,230 psi | 57% | 2769 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 52,040 psi | 82% | 3002 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 80% | 51,198 psi | 80% | 3015 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 45,078 psi | 71% | 2913 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 50,850 psi | 80% | 3012 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 53,272 psi | 83% | 2992 fps | 99.5% |
| Somchem S385 | <<locked>> | 80% | 51,547 psi | 81% | 2986 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,223 psi | 71% | 2858 fps | 99.7% |
| Vihtavuori N170 | <<locked>> | 86% | 47,674 psi | 75% | 2930 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 51,358 psi | 80% | 2989 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 50,430 psi | 79% | 3058 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 80% | 42,206 psi | 66% | 2867 fps | 97.9% |
| Vihtavuori N568 | <<locked>> | 82% | 40,103 psi | 63% | 2858 fps | 96% |
| Vihtavuori N570 | 102.6 gr | 86% | 44,237 psi | 69% | 2989 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 46,035 psi | 72% | 2979 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 47,718 psi | 75% | 2917 fps | 99.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 52 powders for .30-378 Weath. Mag. loaded with the .311 | 180gr | Norma Semi Soft Point. Hodgdon Retumbo delivers the highest muzzle velocity at 3,248 fps; across all powders the maximum-charge window runs from 2,014 fps to 3,248 fps. Accurate 8700 gives the best case fill at 100 %, and 52 of the 52 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 0.311" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, ReloadSwiss RS 14 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. ADI AR 2218, Vihtavuori N570, Hodgdon Retumbo rank at the top here: for .30-378 Weath. Mag. with the .311 | 180gr | Norma Semi Soft Point they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.