Load Specifications
Load data in caliber .30-378 Weath. Mag. with .311 | 180gr | Sellier & Bellot SPRN 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, Hodgdon Retumbo and ReloadSwiss RS 76.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 84% | 55,187 psi | 86% | 3018 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 50,691 psi | 79% | 3045 fps | 97.2% |
| Accurate High Country | <<locked>> | 82% | 57,159 psi | 90% | 3186 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 54,157 psi | 85% | 3127 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 82% | 55,883 psi | 88% | 3107 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 54,723 psi | 86% | 3123 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 92% | 54,273 psi | 85% | 3110 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 54,766 psi | 86% | 3235 fps | 98.8% |
| ADI AR 2225 | <<locked>> | 94% | 53,795 psi | 84% | 3133 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 56,202 psi | 88% | 3104 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,637 psi | 87% | 3097 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,317 psi | 87% | 3120 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 57,348 psi | 90% | 3077 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 54,375 psi | 85% | 3100 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 56,942 psi | 89% | 3212 fps | 98.8% |
| Alliant Reloder-50 | <<locked>> | 98% | 57,014 psi | 89% | 3202 fps | 98.4% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,056 psi | 86% | 3084 fps | 98.6% |
| Bofors RP15 | <<locked>> | 86% | 54,911 psi | 86% | 3114 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 54,331 psi | 85% | 3123 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 55,317 psi | 87% | 3120 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 55,506 psi | 87% | 3127 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 57,290 psi | 90% | 3117 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,173 psi | 88% | 3097 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 88% | 54,041 psi | 85% | 3199 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,000 psi | 60% | 2018 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 57,203 psi | 90% | 3087 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 86% | 57,232 psi | 90% | 3173 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 56,014 psi | 88% | 3038 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 98% | 56,666 psi | 89% | 3176 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 57,305 psi | 90% | 3051 fps | 100% |
| Norma 217 | <<locked>> | 96% | 54,418 psi | 85% | 3136 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,550 psi | 87% | 3133 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,781 psi | 86% | 3133 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 57,261 psi | 90% | 3117 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,957 psi | 61% | 2064 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 54,592 psi | 86% | 3176 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 53,838 psi | 84% | 3143 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 82% | 56,188 psi | 88% | 3074 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 55,390 psi | 87% | 3087 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 52,605 psi | 82% | 3054 fps | 97.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,027 psi | 86% | 3084 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 57,522 psi | 90% | 3064 fps | 99.8% |
| Somchem S385 | <<locked>> | 82% | 55,724 psi | 87% | 3054 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 55,898 psi | 88% | 3041 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,230 psi | 87% | 3071 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 82% | 55,419 psi | 87% | 3051 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 54,853 psi | 86% | 3136 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 88% | 56,333 psi | 88% | 3136 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 54,360 psi | 85% | 3146 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 92% | 55,898 psi | 88% | 3219 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 84% | 54,433 psi | 85% | 3117 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,506 psi | 87% | 3051 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% | 48,182 psi | 76% | 2904 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 43,714 psi | 69% | 2904 fps | 95.1% |
| Accurate High Country | <<locked>> | 80% | 53,345 psi | 84% | 3120 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 80% | 50,531 psi | 79% | 3061 fps | 99% |
| ADI AR 2209 | <<locked>> | 80% | 52,243 psi | 82% | 3045 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 47,688 psi | 75% | 2995 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 80% | 35,534 psi | 56% | 2720 fps | 96.6% |
| ADI AR 2218 | 110.9 gr | 90% | 43,787 psi | 69% | 2999 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 80% | 32,982 psi | 52% | 2694 fps | 98.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 52,504 psi | 82% | 3041 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,011 psi | 82% | 3035 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,443 psi | 76% | 2995 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,065 psi | 74% | 2917 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,234 psi | 65% | 2864 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 42,076 psi | 66% | 2917 fps | 95.1% |
| Alliant Reloder-50 | <<locked>> | 92% | 45,571 psi | 71% | 2986 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,266 psi | 71% | 2897 fps | 96.6% |
| Bofors RP15 | <<locked>> | 80% | 44,991 psi | 71% | 2927 fps | 99.4% |
| Bofors RP30 | <<locked>> | 80% | 38,537 psi | 60% | 2802 fps | 97.6% |
| Bofors RP5 | <<locked>> | 80% | 48,443 psi | 76% | 2995 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 80% | 38,812 psi | 61% | 2802 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 80% | 50,024 psi | 78% | 2989 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,153 psi | 77% | 2972 fps | 99% |
| Hodgdon Retumbo | 93.1 gr | 80% | 40,451 psi | 63% | 2930 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,558 psi | 45% | 1808 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,386 psi | 79% | 2969 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 80% | 46,528 psi | 73% | 2979 fps | 99.1% |
| IMR 7977 Enduron | <<locked>> | 88% | 52,489 psi | 82% | 2976 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 82% | 32,750 psi | 51% | 2667 fps | 95.1% |
| Lovex S071 | <<locked>> | 80% | 41,597 psi | 65% | 2779 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 30,864 psi | 48% | 2631 fps | 96.7% |
| Norma MRP | <<locked>> | 80% | 51,779 psi | 81% | 3071 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,195 psi | 74% | 2999 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 80% | 42,583 psi | 67% | 2861 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,356 psi | 46% | 1850 fps | 100% |
| ReloadSwiss RS 76 | 99.6 gr | 80% | 40,045 psi | 63% | 2900 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 36,869 psi | 58% | 2782 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 52,634 psi | 82% | 3015 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 80% | 51,822 psi | 81% | 3028 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 45,876 psi | 72% | 2927 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,474 psi | 81% | 3022 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 53,911 psi | 84% | 3005 fps | 99.6% |
| Somchem S385 | <<locked>> | 80% | 52,257 psi | 82% | 2995 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,759 psi | 72% | 2871 fps | 99.8% |
| Vihtavuori N170 | <<locked>> | 86% | 48,254 psi | 76% | 2940 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 51,909 psi | 81% | 2999 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,184 psi | 80% | 3071 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 80% | 42,888 psi | 67% | 2881 fps | 98.1% |
| Vihtavuori N568 | <<locked>> | 80% | 37,927 psi | 59% | 2802 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 86% | 44,933 psi | 70% | 3002 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 46,934 psi | 74% | 2992 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,399 psi | 76% | 2933 fps | 99.8% |
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 | Sellier & Bellot SPRN. ADI AR 2218 delivers the highest muzzle velocity at 3,235 fps; across all powders the maximum-charge window runs from 2,018 fps to 3,235 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 60–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.311" calls for a 1:16.5 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, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .30-378 Weath. Mag. with the .311 | 180gr | Sellier & Bellot SPRN 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.