Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 180gr | Sellier & Bellot FMJ-BT bullet and 50 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 Alliant Reloder-33.
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>> | 86% | 57,130 psi | 90% | 3048 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 48,443 psi | 76% | 3005 fps | 96.5% |
| Accurate MAGPRO | <<locked>> | 84% | 56,202 psi | 88% | 3163 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 54,273 psi | 85% | 3081 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 56,898 psi | 89% | 3163 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 94% | 56,072 psi | 88% | 3143 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 56,637 psi | 89% | 3271 fps | 99% |
| ADI AR 2225 | <<locked>> | 96% | 55,361 psi | 87% | 3163 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 57,682 psi | 90% | 3130 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 57,392 psi | 90% | 3153 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 55,550 psi | 87% | 3051 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 56,260 psi | 88% | 3133 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 56,246 psi | 88% | 3143 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 54,549 psi | 85% | 3176 fps | 98.3% |
| Alliant Reloder-50 | <<locked>> | 98% | 54,549 psi | 85% | 3166 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 57,029 psi | 89% | 3114 fps | 98.8% |
| Bofors RP15 | <<locked>> | 88% | 56,753 psi | 89% | 3143 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 56,130 psi | 88% | 3153 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 57,392 psi | 90% | 3153 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 57,551 psi | 90% | 3163 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 55,564 psi | 87% | 3087 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 54,607 psi | 86% | 3071 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 90% | 55,695 psi | 87% | 3228 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,956 psi | 59% | 2008 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 55,854 psi | 88% | 3064 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 86% | 55,303 psi | 87% | 3143 fps | 99.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 54,433 psi | 85% | 3143 fps | 99.9% |
| Lovex S071 | <<locked>> | 90% | 55,448 psi | 87% | 3025 fps | 100% |
| Norma 217 | <<locked>> | 98% | 55,767 psi | 87% | 3166 fps | 100% |
| Norma MRP | <<locked>> | 84% | 57,624 psi | 90% | 3169 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 56,826 psi | 89% | 3169 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 55,317 psi | 87% | 3091 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,928 psi | 61% | 2054 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 56,492 psi | 89% | 3212 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 55,680 psi | 87% | 3179 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 54,694 psi | 86% | 3048 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 84% | 57,595 psi | 90% | 3123 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 50,531 psi | 79% | 3018 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 57,203 psi | 90% | 3120 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,985 psi | 88% | 3038 fps | 99.7% |
| Somchem S385 | <<locked>> | 82% | 54,099 psi | 85% | 3028 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 54,186 psi | 85% | 3015 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 57,319 psi | 90% | 3104 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 84% | 57,290 psi | 90% | 3081 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 56,927 psi | 89% | 3173 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 54,462 psi | 85% | 3110 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 92% | 56,101 psi | 88% | 3179 fps | 99.4% |
| Vihtavuori N570 | <<locked>> | 94% | 57,580 psi | 90% | 3251 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 86% | 56,362 psi | 88% | 3146 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 57,638 psi | 90% | 3084 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% | 46,789 psi | 73% | 2881 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 45,063 psi | 71% | 2940 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 80% | 48,907 psi | 77% | 3031 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 80% | 50,821 psi | 80% | 3022 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 46,137 psi | 72% | 2966 fps | 98.9% |
| ADI AR 2217 | <<locked>> | 80% | 34,389 psi | 54% | 2690 fps | 96% |
| ADI AR 2218 | 110.1 gr | 92% | 45,310 psi | 71% | 3038 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 80% | 31,763 psi | 50% | 2661 fps | 98% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,633 psi | 79% | 3009 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,905 psi | 74% | 2969 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,571 psi | 71% | 2890 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,798 psi | 62% | 2838 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 52,243 psi | 82% | 3081 fps | 100% |
| Alliant Reloder-33 | 107.3 gr | 88% | 43,540 psi | 68% | 2956 fps | 95.5% |
| Alliant Reloder-50 | <<locked>> | 94% | 46,862 psi | 73% | 3018 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,005 psi | 69% | 2867 fps | 96% |
| Bofors RP15 | <<locked>> | 80% | 43,613 psi | 68% | 2900 fps | 99.2% |
| Bofors RP30 | <<locked>> | 80% | 37,188 psi | 58% | 2772 fps | 97.1% |
| Bofors RP5 | <<locked>> | 80% | 46,905 psi | 74% | 2969 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 80% | 37,463 psi | 59% | 2772 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 80% | 48,443 psi | 76% | 2959 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,732 psi | 75% | 2946 fps | 98.7% |
| Hodgdon Retumbo | <<locked>> | 80% | 38,928 psi | 61% | 2894 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,485 psi | 45% | 1798 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,139 psi | 77% | 2943 fps | 99% |
| IMR 7828 SSC | <<locked>> | 80% | 44,918 psi | 70% | 2946 fps | 98.7% |
| IMR 8133 Enduron | <<locked>> | 84% | 33,678 psi | 53% | 2697 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 40,321 psi | 63% | 2753 fps | 99.8% |
| Norma 217 | <<locked>> | 80% | 29,544 psi | 46% | 2598 fps | 96% |
| Norma MRP | <<locked>> | 80% | 50,038 psi | 78% | 3045 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 45,397 psi | 71% | 2966 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 80% | 40,959 psi | 64% | 2831 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,283 psi | 46% | 1841 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 38,348 psi | 60% | 2867 fps | 99.6% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 38,087 psi | 60% | 2818 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 51,285 psi | 80% | 2989 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 50,357 psi | 79% | 3002 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 47,166 psi | 74% | 2956 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 50,024 psi | 78% | 2999 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 52,373 psi | 82% | 2976 fps | 99.4% |
| Somchem S385 | <<locked>> | 80% | 50,763 psi | 80% | 2972 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 44,469 psi | 70% | 2844 fps | 99.6% |
| Vihtavuori N170 | <<locked>> | 88% | 50,067 psi | 78% | 2979 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 80% | 50,314 psi | 79% | 2972 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,516 psi | 78% | 3041 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 80% | 41,336 psi | 65% | 2848 fps | 97.6% |
| Vihtavuori N568 | <<locked>> | 82% | 39,146 psi | 61% | 2838 fps | 95.6% |
| Vihtavuori N570 | 103.2 gr | 88% | 46,441 psi | 73% | 3038 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 44,889 psi | 70% | 2963 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,862 psi | 73% | 2904 fps | 99.6% |
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 57 powders for .30-378 Weath. Mag. loaded with the .308 | 180gr | Sellier & Bellot FMJ-BT. ADI AR 2218 delivers the highest muzzle velocity at 3,271 fps; across all powders the maximum-charge window runs from 2,008 fps to 3,271 fps. Accurate 8700 gives the best case fill at 100 %, and 57 of the 57 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. ADI AR 2218, Vihtavuori N570, Alliant Reloder-33 rank at the top here: for .30-378 Weath. Mag. with the .308 | 180gr | Sellier & Bellot FMJ-BT they combine a high case fill with complete burn and sit in the upper velocity band. 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.