Load Specifications
Load data in caliber .30-378 Weath. Mag. with .311 | 180gr | Sierra Pro-Hunter 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.
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% | 54,273 psi | 85% | 3005 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 49,429 psi | 77% | 3022 fps | 96.8% |
| Accurate High Country | <<locked>> | 82% | 55,985 psi | 88% | 3166 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 84% | 57,101 psi | 89% | 3179 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 82% | 55,056 psi | 86% | 3094 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 57,638 psi | 90% | 3173 fps | 100% |
| ADI AR 2217 | <<locked>> | 94% | 57,014 psi | 89% | 3153 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 57,725 psi | 90% | 3287 fps | 99.2% |
| ADI AR 2225 | <<locked>> | 96% | 56,449 psi | 88% | 3176 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 54,737 psi | 86% | 3081 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 54,404 psi | 85% | 3104 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 56,362 psi | 88% | 3061 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 57,014 psi | 89% | 3140 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 57,217 psi | 90% | 3153 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 55,535 psi | 87% | 3189 fps | 98.5% |
| Alliant Reloder-50 | <<locked>> | 98% | 55,593 psi | 87% | 3182 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 57,725 psi | 90% | 3127 fps | 98.9% |
| Bofors RP15 | <<locked>> | 88% | 57,522 psi | 90% | 3156 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 57,029 psi | 89% | 3166 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 54,404 psi | 85% | 3104 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 54,418 psi | 85% | 3110 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 56,260 psi | 88% | 3097 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 55,317 psi | 87% | 3081 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 90% | 56,536 psi | 89% | 3238 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,884 psi | 59% | 2011 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,376 psi | 88% | 3071 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 86% | 56,246 psi | 88% | 3156 fps | 99.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 55,463 psi | 87% | 3156 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 56,202 psi | 88% | 3035 fps | 100% |
| Norma 217 | <<locked>> | 98% | 56,869 psi | 89% | 3182 fps | 100% |
| Norma MRP | <<locked>> | 82% | 54,389 psi | 85% | 3117 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 57,638 psi | 90% | 3179 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 56,188 psi | 88% | 3104 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,986 psi | 61% | 2060 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 57,638 psi | 90% | 3225 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 56,681 psi | 89% | 3192 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 82% | 55,448 psi | 87% | 3061 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 54,549 psi | 85% | 3074 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 51,387 psi | 81% | 3035 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 54,230 psi | 85% | 3068 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,768 psi | 89% | 3048 fps | 99.8% |
| Somchem S385 | <<locked>> | 82% | 54,810 psi | 86% | 3041 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 54,868 psi | 86% | 3028 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 54,186 psi | 85% | 3051 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 82% | 54,549 psi | 85% | 3041 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 57,638 psi | 90% | 3186 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 88% | 55,143 psi | 86% | 3117 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 92% | 57,116 psi | 90% | 3196 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 92% | 54,549 psi | 85% | 3196 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 86% | 57,319 psi | 90% | 3159 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 54,476 psi | 85% | 3035 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 47,355 psi | 74% | 2890 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 45,832 psi | 72% | 2953 fps | 95.8% |
| Accurate High Country | <<locked>> | 80% | 52,344 psi | 82% | 3104 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 80% | 49,487 psi | 78% | 3041 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 80% | 51,430 psi | 81% | 3031 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 46,760 psi | 73% | 2976 fps | 99% |
| ADI AR 2217 | <<locked>> | 80% | 34,882 psi | 55% | 2700 fps | 96.2% |
| ADI AR 2218 | <<locked>> | 90% | 42,859 psi | 67% | 2979 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 80% | 32,213 psi | 50% | 2674 fps | 98.2% |
| Alliant Reloder-19 | <<locked>> | 80% | 51,213 psi | 80% | 3018 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 47,514 psi | 74% | 2979 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 46,209 psi | 72% | 2900 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 40,408 psi | 63% | 2851 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 53,055 psi | 83% | 3091 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 44,295 psi | 69% | 2969 fps | 95.8% |
| Alliant Reloder-50 | <<locked>> | 92% | 44,425 psi | 70% | 2963 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,570 psi | 70% | 2881 fps | 96.2% |
| Bofors RP15 | <<locked>> | 80% | 44,208 psi | 69% | 2910 fps | 99.3% |
| Bofors RP30 | <<locked>> | 80% | 37,753 psi | 59% | 2785 fps | 97.3% |
| Bofors RP5 | <<locked>> | 80% | 47,514 psi | 74% | 2979 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 80% | 38,000 psi | 60% | 2785 fps | 98% |
| Hodgdon H4831 | <<locked>> | 80% | 49,139 psi | 77% | 2972 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 80% | 48,269 psi | 76% | 2956 fps | 98.8% |
| Hodgdon Retumbo | <<locked>> | 80% | 39,508 psi | 62% | 2907 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,543 psi | 45% | 1801 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,690 psi | 78% | 2956 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 80% | 45,556 psi | 71% | 2959 fps | 98.9% |
| IMR 8133 Enduron | <<locked>> | 84% | 34,330 psi | 54% | 2713 fps | 95.8% |
| Lovex S071 | <<locked>> | 80% | 40,915 psi | 64% | 2762 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 30,095 psi | 47% | 2608 fps | 96.2% |
| Norma MRP | <<locked>> | 80% | 50,807 psi | 80% | 3054 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 46,180 psi | 72% | 2979 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 80% | 41,669 psi | 65% | 2844 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,341 psi | 46% | 1847 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 39,015 psi | 61% | 2881 fps | 99.7% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 38,841 psi | 61% | 2835 fps | 96.2% |
| Rottweil R 904 | <<locked>> | 80% | 51,880 psi | 81% | 2999 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 50,981 psi | 80% | 3012 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 44,802 psi | 70% | 2904 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 50,647 psi | 79% | 3009 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 52,997 psi | 83% | 2989 fps | 99.5% |
| Somchem S385 | <<locked>> | 80% | 51,343 psi | 80% | 2982 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,049 psi | 71% | 2854 fps | 99.7% |
| Vihtavuori N170 | <<locked>> | 86% | 47,413 psi | 74% | 2923 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 80% | 50,981 psi | 80% | 2982 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 50,256 psi | 79% | 3054 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 80% | 42,047 psi | 66% | 2864 fps | 97.8% |
| Vihtavuori N568 | <<locked>> | 82% | 39,798 psi | 62% | 2851 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 86% | 43,903 psi | 69% | 2979 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 45,818 psi | 72% | 2979 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 47,558 psi | 75% | 2913 fps | 99.7% |
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 .311 | 180gr | Sierra Pro-Hunter. ADI AR 2218 delivers the highest muzzle velocity at 3,287 fps; across all powders the maximum-charge window runs from 2,011 fps to 3,287 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 0.311" calls for a 1:14.5 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.