Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | Nosler Solid Base 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.
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>> | 88% | 55,172 psi | 86% | 3255 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 57,145 psi | 90% | 3425 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 86% | 54,201 psi | 85% | 3356 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 86% | 56,449 psi | 88% | 3353 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 88% | 54,766 psi | 86% | 3360 fps | 99.1% |
| ADI AR 2217 | <<locked>> | 98% | 57,595 psi | 90% | 3396 fps | 99.7% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 54,215 psi | 85% | 3432 fps | 96.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 56,231 psi | 88% | 3412 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 56,521 psi | 89% | 3350 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,999 psi | 88% | 3340 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 55,245 psi | 87% | 3353 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 90% | 57,072 psi | 89% | 3323 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 57,435 psi | 90% | 3396 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 53,838 psi | 84% | 3350 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 55,854 psi | 88% | 3415 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 55,738 psi | 87% | 3310 fps | 97.2% |
| Bofors RP15 | <<locked>> | 90% | 54,621 psi | 86% | 3340 fps | 99.6% |
| Bofors RP30 | <<locked>> | 96% | 57,334 psi | 90% | 3406 fps | 99.7% |
| Bofors RP5 | <<locked>> | 88% | 55,245 psi | 87% | 3353 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 94% | 55,027 psi | 86% | 3350 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 86% | 54,143 psi | 85% | 3287 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 56,724 psi | 89% | 3333 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 56,724 psi | 89% | 3258 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 56,463 psi | 88% | 3488 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,565 psi | 59% | 2185 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,085 psi | 86% | 3268 fps | 99.9% |
| IMR 4831 | <<locked>> | 82% | 55,680 psi | 87% | 3274 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 54,621 psi | 86% | 3268 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 90% | 57,043 psi | 89% | 3409 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 51,474 psi | 81% | 3314 fps | 99% |
| Lovex S070 | <<locked>> | 82% | 57,290 psi | 90% | 3304 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 57,014 psi | 89% | 3281 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,362 psi | 88% | 3327 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 52,417 psi | 82% | 3343 fps | 100% |
| Norma MRP | <<locked>> | 86% | 55,463 psi | 87% | 3376 fps | 100% |
| Norma URP | <<locked>> | 82% | 57,246 psi | 90% | 3323 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 54,273 psi | 85% | 3363 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 82% | 56,304 psi | 88% | 3327 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 57,000 psi | 89% | 3350 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,435 psi | 60% | 2231 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 57,653 psi | 90% | 3474 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 57,217 psi | 90% | 3428 fps | 99% |
| Rottweil R 904 | <<locked>> | 86% | 56,971 psi | 89% | 3317 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 86% | 55,782 psi | 87% | 3330 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 82% | 57,290 psi | 90% | 3304 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,711 psi | 90% | 3251 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 55,390 psi | 87% | 3327 fps | 99.7% |
| Somchem S361 | <<locked>> | 84% | 54,839 psi | 86% | 3238 fps | 98.7% |
| Somchem S365 | <<locked>> | 82% | 54,955 psi | 86% | 3264 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,130 psi | 88% | 3297 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 56,217 psi | 88% | 3278 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 86% | 55,216 psi | 87% | 3297 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 54,940 psi | 86% | 3373 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 92% | 55,811 psi | 87% | 3360 fps | 99.1% |
| Vihtavuori N568 | <<locked>> | 96% | 57,522 psi | 90% | 3428 fps | 98.6% |
| Vihtavuori N570 | <<locked>> | 96% | 54,636 psi | 86% | 3419 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 57,058 psi | 89% | 3415 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,144 psi | 88% | 3291 fps | 99.8% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 42,018 psi | 66% | 3002 fps | 99.4% |
| Accurate High Country | <<locked>> | 80% | 46,050 psi | 72% | 3205 fps | 97.5% |
| Accurate MAGPRO | <<locked>> | 80% | 43,555 psi | 68% | 3130 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 45,992 psi | 72% | 3150 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 80% | 41,278 psi | 65% | 3071 fps | 96% |
| ADI AR 2217 | <<locked>> | 86% | 37,840 psi | 59% | 2976 fps | 95.2% |
| ADI AR 2218 | <<locked>> | 98% | 50,357 psi | 79% | 3343 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 84% | 32,343 psi | 51% | 2864 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,794 psi | 83% | 3287 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,948 psi | 72% | 3143 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,989 psi | 66% | 3084 fps | 97.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,698 psi | 64% | 3028 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,172 psi | 55% | 2940 fps | 98.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,137 psi | 72% | 3205 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 51,692 psi | 81% | 3337 fps | 96.1% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 48,878 psi | 77% | 3176 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 39,059 psi | 61% | 3009 fps | 96.5% |
| Bofors RP30 | <<locked>> | 84% | 37,695 psi | 59% | 2989 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 41,989 psi | 66% | 3084 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 82% | 35,810 psi | 56% | 2923 fps | 95% |
| Hodgdon H4831 | <<locked>> | 80% | 43,918 psi | 69% | 3077 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,134 psi | 68% | 3061 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,676 psi | 78% | 3146 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 34,330 psi | 54% | 2966 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,152 psi | 44% | 1959 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,648 psi | 81% | 3205 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 52,127 psi | 82% | 3215 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,005 psi | 71% | 3077 fps | 96.8% |
| IMR 7828 SSC | <<locked>> | 80% | 39,987 psi | 63% | 3048 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 92% | 38,986 psi | 61% | 3041 fps | 95.7% |
| Lovex S070 | <<locked>> | 80% | 53,708 psi | 84% | 3241 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 36,129 psi | 57% | 2861 fps | 98.1% |
| Norma 204 | <<locked>> | 80% | 52,547 psi | 82% | 3258 fps | 99.3% |
| Norma 217 | <<locked>> | 88% | 34,098 psi | 53% | 2927 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 44,614 psi | 70% | 3163 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 53,592 psi | 84% | 3261 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,958 psi | 63% | 3058 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 52,620 psi | 82% | 3261 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,984 psi | 56% | 2920 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,863 psi | 45% | 2005 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 33,649 psi | 53% | 2933 fps | 96.5% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 41,945 psi | 66% | 3117 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 46,847 psi | 73% | 3123 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 80% | 45,469 psi | 71% | 3130 fps | 98.4% |
| Shooters World SW4350 | <<locked>> | 80% | 53,708 psi | 84% | 3241 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 54,099 psi | 85% | 3192 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,136 psi | 71% | 3123 fps | 98.3% |
| Somchem S361 | <<locked>> | 80% | 47,935 psi | 75% | 3107 fps | 97.4% |
| Somchem S365 | <<locked>> | 80% | 51,314 psi | 80% | 3209 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,963 psi | 72% | 3104 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 80% | 40,103 psi | 63% | 2959 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 45,237 psi | 71% | 3117 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,295 psi | 69% | 3153 fps | 96.4% |
| Vihtavuori N565 | <<locked>> | 82% | 39,465 psi | 62% | 3009 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 90% | 46,166 psi | 72% | 3205 fps | 96% |
| Vihtavuori N570 | <<locked>> | 94% | 50,792 psi | 80% | 3343 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,624 psi | 61% | 3074 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,337 psi | 66% | 3022 fps | 97.7% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 65 powders for .30-378 Weath. Mag. loaded with the .308 | 150gr | Nosler Solid Base. Hodgdon Retumbo delivers the highest muzzle velocity at 3,488 fps; across all powders the maximum-charge window runs from 2,185 fps to 3,488 fps. Accurate 8700 gives the best case fill at 100 %, and 65 of the 65 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 0.308" calls for a 1:14.0 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.