Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 159gr | Hasler Bull bullet and 58 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.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 54,795 psi | 86% | 3176 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 56,782 psi | 89% | 3346 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 86% | 53,853 psi | 84% | 3281 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 86% | 56,376 psi | 88% | 3281 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 88% | 54,679 psi | 86% | 3287 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 98% | 57,493 psi | 90% | 3327 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 53,983 psi | 85% | 3363 fps | 97.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 56,014 psi | 88% | 3343 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 56,478 psi | 89% | 3271 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,898 psi | 88% | 3264 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 88% | 55,042 psi | 86% | 3281 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 90% | 56,811 psi | 89% | 3245 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 57,319 psi | 90% | 3320 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 53,563 psi | 84% | 3274 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 55,390 psi | 87% | 3343 fps | 97.4% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 55,622 psi | 87% | 3245 fps | 97.6% |
| Bofors RP15 | <<locked>> | 90% | 54,418 psi | 85% | 3268 fps | 99.8% |
| Bofors RP30 | <<locked>> | 96% | 57,000 psi | 89% | 3333 fps | 99.8% |
| Bofors RP5 | <<locked>> | 88% | 55,042 psi | 86% | 3281 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 94% | 54,984 psi | 86% | 3281 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 86% | 53,940 psi | 85% | 3215 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 56,608 psi | 89% | 3264 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 56,405 psi | 88% | 3182 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 56,289 psi | 88% | 3412 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,507 psi | 59% | 2123 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 54,984 psi | 86% | 3192 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 55,463 psi | 87% | 3196 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 54,520 psi | 85% | 3199 fps | 99% |
| IMR 7828 SSC | <<locked>> | 90% | 57,043 psi | 89% | 3337 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 51,140 psi | 80% | 3245 fps | 99.2% |
| Lovex S070 | <<locked>> | 82% | 57,043 psi | 89% | 3228 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 56,492 psi | 89% | 3205 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,231 psi | 88% | 3255 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 52,083 psi | 82% | 3268 fps | 100% |
| Norma MRP | <<locked>> | 86% | 55,114 psi | 86% | 3297 fps | 100% |
| Norma URP | <<locked>> | 82% | 57,087 psi | 89% | 3245 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 54,056 psi | 85% | 3287 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 82% | 56,159 psi | 88% | 3251 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 56,782 psi | 89% | 3278 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,363 psi | 60% | 2169 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 57,522 psi | 90% | 3399 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 56,811 psi | 89% | 3356 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 86% | 56,869 psi | 89% | 3245 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 86% | 55,608 psi | 87% | 3255 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 82% | 57,043 psi | 89% | 3228 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,580 psi | 90% | 3176 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 55,230 psi | 87% | 3251 fps | 99.9% |
| Somchem S361 | <<locked>> | 84% | 54,650 psi | 86% | 3166 fps | 98.9% |
| Somchem S365 | <<locked>> | 82% | 54,752 psi | 86% | 3189 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,927 psi | 88% | 3222 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 55,883 psi | 88% | 3205 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 54,810 psi | 86% | 3215 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 54,665 psi | 86% | 3297 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 92% | 55,434 psi | 87% | 3284 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 96% | 57,217 psi | 90% | 3360 fps | 98.9% |
| Vihtavuori N570 | <<locked>> | 96% | 54,360 psi | 85% | 3350 fps | 96.8% |
| Winchester StaBALL HD | <<locked>> | 90% | 56,869 psi | 89% | 3337 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,825 psi | 87% | 3219 fps | 99.9% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 41,379 psi | 65% | 2927 fps | 99.5% |
| Accurate High Country | <<locked>> | 80% | 45,672 psi | 72% | 3130 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 80% | 43,207 psi | 68% | 3061 fps | 96% |
| ADI AR 2209 | <<locked>> | 80% | 45,788 psi | 72% | 3077 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 80% | 41,031 psi | 64% | 3005 fps | 96.5% |
| ADI AR 2217 | <<locked>> | 86% | 37,420 psi | 59% | 2907 fps | 95.6% |
| ADI AR 2218 | <<locked>> | 98% | 50,024 psi | 78% | 3281 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 82% | 29,675 psi | 47% | 2720 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,808 psi | 83% | 3209 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,687 psi | 72% | 3071 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,669 psi | 65% | 3012 fps | 97.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,277 psi | 63% | 2953 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,751 psi | 54% | 2867 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,788 psi | 72% | 3133 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 47,355 psi | 74% | 3186 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,687 psi | 72% | 3045 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 38,638 psi | 61% | 2933 fps | 96.9% |
| Bofors RP30 | <<locked>> | 84% | 37,246 psi | 58% | 2917 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 41,669 psi | 65% | 3012 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 82% | 35,520 psi | 56% | 2858 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 80% | 43,685 psi | 68% | 3012 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,888 psi | 67% | 2992 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,472 psi | 78% | 3071 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 33,939 psi | 53% | 2897 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,108 psi | 44% | 1903 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,474 psi | 81% | 3133 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 51,779 psi | 81% | 3136 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,744 psi | 70% | 3005 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 80% | 39,697 psi | 62% | 2982 fps | 96.1% |
| IMR 8133 Enduron | <<locked>> | 92% | 38,435 psi | 60% | 2966 fps | 96% |
| Lovex S070 | <<locked>> | 80% | 53,374 psi | 84% | 3166 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,447 psi | 56% | 2785 fps | 98.3% |
| Norma 204 | <<locked>> | 80% | 52,475 psi | 82% | 3189 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 31,183 psi | 49% | 2782 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 44,208 psi | 69% | 3091 fps | 99.4% |
| Norma URP | <<locked>> | 80% | 53,301 psi | 84% | 3182 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,711 psi | 62% | 2992 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 80% | 52,504 psi | 82% | 3189 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,534 psi | 56% | 2848 fps | 96.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,819 psi | 45% | 1949 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 33,214 psi | 52% | 2864 fps | 96.9% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 41,423 psi | 65% | 3045 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 46,615 psi | 73% | 3051 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 80% | 45,150 psi | 71% | 3058 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 80% | 53,374 psi | 84% | 3166 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,809 psi | 84% | 3117 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,817 psi | 70% | 3054 fps | 98.7% |
| Somchem S361 | <<locked>> | 80% | 47,674 psi | 75% | 3038 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 50,966 psi | 80% | 3130 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,614 psi | 71% | 3031 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 80% | 39,726 psi | 62% | 2890 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 44,701 psi | 70% | 3038 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,990 psi | 69% | 3081 fps | 96.9% |
| Vihtavuori N565 | <<locked>> | 82% | 38,943 psi | 61% | 2936 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 88% | 42,496 psi | 67% | 3061 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 94% | 50,531 psi | 79% | 3274 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,348 psi | 60% | 3002 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,061 psi | 66% | 2953 fps | 98% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 66 powders for .30-378 Weath. Mag. loaded with the .308 | 159gr | Hasler Bull. Hodgdon Retumbo delivers the highest muzzle velocity at 3,412 fps; across all powders the maximum-charge window runs from 2,123 fps to 3,412 fps. Accurate 8700 gives the best case fill at 100 %, and 66 of the 66 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 159.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2218, ADI AR 2225 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, Accurate 8700, IMR 7977 Enduron, Lovex D100 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.