Load Specifications
Load data in caliber .30-378 Weath. Mag. with .311 | 150gr | Norma Semi Soft Point bullet and 55 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and ReloadSwiss RS 80.
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% | 56,144 psi | 88% | 3268 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 54,085 psi | 85% | 3366 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 86% | 55,085 psi | 86% | 3369 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 86% | 57,217 psi | 90% | 3366 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 88% | 55,869 psi | 88% | 3376 fps | 99.3% |
| ADI AR 2217 | <<locked>> | 96% | 54,636 psi | 86% | 3343 fps | 99.5% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,347 psi | 87% | 3455 fps | 97.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,479 psi | 90% | 3432 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 57,537 psi | 90% | 3363 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,305 psi | 90% | 3360 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,913 psi | 89% | 3353 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,347 psi | 88% | 3373 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 54,346 psi | 85% | 3278 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 54,592 psi | 86% | 3346 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 54,868 psi | 86% | 3363 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 57,174 psi | 90% | 3435 fps | 97.4% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,579 psi | 89% | 3327 fps | 97.5% |
| Bofors RP15 | <<locked>> | 90% | 55,550 psi | 87% | 3356 fps | 99.7% |
| Bofors RP30 | <<locked>> | 94% | 54,607 psi | 86% | 3356 fps | 99.4% |
| Bofors RP5 | <<locked>> | 88% | 56,347 psi | 88% | 3373 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 94% | 56,086 psi | 88% | 3369 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 86% | 54,839 psi | 86% | 3297 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 86% | 53,940 psi | 85% | 3281 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,435 psi | 90% | 3268 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,682 psi | 90% | 3507 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,652 psi | 59% | 2192 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,840 psi | 88% | 3281 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,550 psi | 89% | 3287 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,303 psi | 87% | 3281 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 88% | 54,172 psi | 85% | 3353 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,518 psi | 82% | 3330 fps | 99.2% |
| Lovex S071 | <<locked>> | 92% | 54,346 psi | 85% | 3238 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,130 psi | 90% | 3343 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 53,679 psi | 84% | 3363 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,449 psi | 88% | 3389 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,303 psi | 87% | 3376 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 82% | 57,116 psi | 90% | 3340 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 53,940 psi | 85% | 3294 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,508 psi | 60% | 2238 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 54,578 psi | 86% | 3419 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 54,128 psi | 85% | 3369 fps | 98.5% |
| Rottweil R 904 | <<locked>> | 84% | 54,273 psi | 85% | 3268 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 86% | 56,594 psi | 89% | 3343 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,202 psi | 88% | 3340 fps | 99.8% |
| Somchem S361 | <<locked>> | 84% | 55,796 psi | 87% | 3255 fps | 98.9% |
| Somchem S365 | <<locked>> | 82% | 55,912 psi | 88% | 3281 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 57,072 psi | 89% | 3310 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,101 psi | 89% | 3291 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 56,130 psi | 88% | 3310 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,883 psi | 88% | 3389 fps | 99% |
| Vihtavuori N565 | <<locked>> | 92% | 56,855 psi | 89% | 3373 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 94% | 54,520 psi | 85% | 3373 fps | 98.1% |
| Vihtavuori N570 | <<locked>> | 96% | 55,854 psi | 88% | 3442 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 88% | 54,186 psi | 85% | 3363 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,043 psi | 89% | 3304 fps | 99.8% |
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% | 42,772 psi | 67% | 3018 fps | 99.5% |
| Accurate High Country | <<locked>> | 80% | 46,862 psi | 73% | 3219 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 80% | 44,440 psi | 70% | 3150 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 46,775 psi | 73% | 3166 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 80% | 42,018 psi | 66% | 3091 fps | 96.4% |
| ADI AR 2217 | <<locked>> | 86% | 38,493 psi | 60% | 2992 fps | 95.6% |
| ADI AR 2218 | <<locked>> | 98% | 51,300 psi | 80% | 3366 fps | 96% |
| ADI AR 2225 | <<locked>> | 82% | 30,690 psi | 48% | 2805 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 47,152 psi | 74% | 3166 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,592 psi | 84% | 3297 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,717 psi | 73% | 3159 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,786 psi | 67% | 3097 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,423 psi | 65% | 3038 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,882 psi | 56% | 2956 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,166 psi | 74% | 3222 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 48,950 psi | 77% | 3278 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 49,661 psi | 78% | 3192 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 39,697 psi | 62% | 3022 fps | 96.8% |
| Bofors RP30 | <<locked>> | 84% | 38,450 psi | 60% | 3005 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 42,786 psi | 67% | 3097 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 82% | 36,448 psi | 57% | 2940 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 80% | 44,614 psi | 70% | 3094 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,845 psi | 69% | 3074 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,415 psi | 79% | 3156 fps | 100% |
| Hodgdon Retumbo | 94.2 gr | 80% | 35,027 psi | 55% | 2986 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,239 psi | 44% | 1965 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,431 psi | 82% | 3219 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 52,997 psi | 83% | 3225 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,687 psi | 72% | 3087 fps | 97% |
| IMR 7828 SSC | <<locked>> | 80% | 40,741 psi | 64% | 3064 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 92% | 39,827 psi | 62% | 3058 fps | 96% |
| Lovex S071 | <<locked>> | 80% | 36,767 psi | 58% | 2877 fps | 98.3% |
| Norma 204 | <<locked>> | 80% | 53,345 psi | 84% | 3274 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 32,547 psi | 51% | 2877 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 45,426 psi | 71% | 3179 fps | 99.3% |
| Ramshot Grand | <<locked>> | 80% | 40,756 psi | 64% | 3077 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 80% | 53,432 psi | 84% | 3278 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,811 psi | 58% | 2936 fps | 97% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,950 psi | 45% | 2011 fps | 100% |
| ReloadSwiss RS 76 | 100.8 gr | 80% | 34,403 psi | 54% | 2956 fps | 97% |
| ReloadSwiss RS 80 | 111.8 gr | 88% | 42,902 psi | 67% | 3136 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 47,471 psi | 74% | 3136 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 80% | 46,311 psi | 73% | 3146 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,963 psi | 72% | 3143 fps | 98.6% |
| Somchem S361 | <<locked>> | 80% | 48,704 psi | 76% | 3120 fps | 97.6% |
| Somchem S365 | <<locked>> | 80% | 52,228 psi | 82% | 3222 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,746 psi | 73% | 3120 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 80% | 40,814 psi | 64% | 2976 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 45,963 psi | 72% | 3127 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,107 psi | 71% | 3166 fps | 96.7% |
| Vihtavuori N565 | <<locked>> | 82% | 40,190 psi | 63% | 3028 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 88% | 43,903 psi | 69% | 3153 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 94% | 51,808 psi | 81% | 3363 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,566 psi | 62% | 3094 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,062 psi | 67% | 3035 fps | 97.9% |
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 55 powders for .30-378 Weath. Mag. loaded with the .311 | 150gr | Norma Semi Soft Point. Hodgdon Retumbo delivers the highest muzzle velocity at 3,507 fps; across all powders the maximum-charge window runs from 2,192 fps to 3,507 fps. ADI AR 2218 gives the best case fill at 100 %, and 55 of the 55 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 150.0 gr projectile in 0.311" calls for a 1:17.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Hodgdon TrailBoss 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. Hodgdon Retumbo, ReloadSwiss RS 76, ReloadSwiss RS 80 rank at the top here: for .30-378 Weath. Mag. with the .311 | 150gr | 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.