Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | Nosler Ballistic Silver Tip bullet and 54 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% | 55,796 psi | 87% | 3264 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 57,638 psi | 90% | 3435 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 86% | 54,650 psi | 86% | 3363 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 86% | 56,927 psi | 89% | 3360 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 88% | 55,434 psi | 87% | 3369 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 96% | 54,215 psi | 85% | 3337 fps | 99.4% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 54,853 psi | 86% | 3442 fps | 97% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,000 psi | 89% | 3428 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 56,927 psi | 89% | 3353 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,463 psi | 88% | 3346 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 55,898 psi | 88% | 3366 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 57,595 psi | 90% | 3330 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 54,099 psi | 85% | 3343 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 54,360 psi | 85% | 3356 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,594 psi | 89% | 3428 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,231 psi | 88% | 3320 fps | 97.4% |
| Bofors RP15 | <<locked>> | 90% | 55,259 psi | 87% | 3353 fps | 99.7% |
| Bofors RP30 | <<locked>> | 94% | 53,998 psi | 85% | 3346 fps | 99.4% |
| Bofors RP5 | <<locked>> | 88% | 55,898 psi | 88% | 3366 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 94% | 55,637 psi | 87% | 3363 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 86% | 54,563 psi | 86% | 3294 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,348 psi | 90% | 3343 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,087 psi | 89% | 3268 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,000 psi | 89% | 3497 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,565 psi | 59% | 2185 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,535 psi | 87% | 3278 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,217 psi | 88% | 3281 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,042 psi | 86% | 3278 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 90% | 57,566 psi | 90% | 3412 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,112 psi | 82% | 3323 fps | 99.1% |
| Lovex S071 | <<locked>> | 94% | 57,450 psi | 90% | 3291 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,797 psi | 89% | 3337 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 53,200 psi | 83% | 3356 fps | 100% |
| Norma MRP | <<locked>> | 86% | 55,985 psi | 88% | 3383 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 54,781 psi | 86% | 3366 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 82% | 56,797 psi | 89% | 3333 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 53,490 psi | 84% | 3291 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,551 psi | 60% | 2238 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 54,099 psi | 85% | 3415 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 53,534 psi | 84% | 3363 fps | 98.4% |
| Rottweil R 904 | <<locked>> | 86% | 57,435 psi | 90% | 3323 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 86% | 56,275 psi | 88% | 3340 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 55,883 psi | 88% | 3333 fps | 99.8% |
| Somchem S361 | <<locked>> | 84% | 55,390 psi | 87% | 3248 fps | 98.8% |
| Somchem S365 | <<locked>> | 82% | 55,492 psi | 87% | 3274 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,637 psi | 89% | 3304 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 56,652 psi | 89% | 3284 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 86% | 55,753 psi | 87% | 3304 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,405 psi | 87% | 3383 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 92% | 56,362 psi | 88% | 3369 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 94% | 54,128 psi | 85% | 3366 fps | 98% |
| Vihtavuori N570 | <<locked>> | 96% | 55,230 psi | 87% | 3432 fps | 96.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 53,650 psi | 84% | 3360 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,594 psi | 89% | 3297 fps | 99.8% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 42,467 psi | 67% | 3012 fps | 99.4% |
| Accurate High Country | <<locked>> | 80% | 46,543 psi | 73% | 3212 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 80% | 44,005 psi | 69% | 3140 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 46,456 psi | 73% | 3159 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 80% | 41,713 psi | 65% | 3084 fps | 96.2% |
| ADI AR 2217 | <<locked>> | 86% | 38,232 psi | 60% | 2989 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 98% | 50,807 psi | 80% | 3353 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 84% | 32,590 psi | 51% | 2871 fps | 96.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,200 psi | 83% | 3294 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,398 psi | 73% | 3150 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,438 psi | 67% | 3091 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,075 psi | 64% | 3031 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,592 psi | 56% | 2949 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,659 psi | 73% | 3215 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 48,428 psi | 76% | 3264 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 49,313 psi | 77% | 3186 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 39,494 psi | 62% | 3018 fps | 96.7% |
| Bofors RP30 | <<locked>> | 84% | 38,145 psi | 60% | 3002 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 42,438 psi | 67% | 3091 fps | 97.7% |
| Hodgdon H1000 | <<locked>> | 82% | 36,216 psi | 57% | 2933 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 80% | 44,338 psi | 69% | 3087 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,555 psi | 68% | 3071 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,038 psi | 78% | 3153 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 34,737 psi | 54% | 2979 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,224 psi | 44% | 1965 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,127 psi | 82% | 3215 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 52,649 psi | 83% | 3222 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,397 psi | 71% | 3084 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 80% | 40,437 psi | 63% | 3061 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 92% | 39,436 psi | 62% | 3048 fps | 95.9% |
| Lovex S071 | <<locked>> | 80% | 36,463 psi | 57% | 2871 fps | 98.2% |
| Norma 204 | <<locked>> | 80% | 53,040 psi | 83% | 3268 fps | 99.4% |
| Norma 217 | <<locked>> | 86% | 32,140 psi | 50% | 2864 fps | 95% |
| Norma MRP | <<locked>> | 80% | 45,063 psi | 71% | 3173 fps | 99.3% |
| Ramshot Grand | <<locked>> | 80% | 40,408 psi | 63% | 3071 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 80% | 53,098 psi | 83% | 3271 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,405 psi | 57% | 2927 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,935 psi | 45% | 2011 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 34,026 psi | 53% | 2943 fps | 96.7% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 42,366 psi | 66% | 3123 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 47,166 psi | 74% | 3130 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 80% | 45,977 psi | 72% | 3140 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,629 psi | 72% | 3133 fps | 98.5% |
| Somchem S361 | <<locked>> | 80% | 48,327 psi | 76% | 3114 fps | 97.5% |
| Somchem S365 | <<locked>> | 80% | 51,851 psi | 81% | 3215 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,427 psi | 73% | 3114 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 80% | 40,524 psi | 64% | 2969 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 45,643 psi | 72% | 3123 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,773 psi | 70% | 3163 fps | 96.6% |
| Vihtavuori N565 | <<locked>> | 82% | 39,900 psi | 63% | 3022 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 88% | 43,497 psi | 68% | 3143 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 94% | 51,372 psi | 81% | 3353 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,175 psi | 61% | 3084 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,786 psi | 67% | 3031 fps | 97.8% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 61 powders for .30-378 Weath. Mag. loaded with the .308 | 150gr | Nosler Ballistic Silver Tip. Hodgdon Retumbo delivers the highest muzzle velocity at 3,497 fps; across all powders the maximum-charge window runs from 2,185 fps to 3,497 fps. Accurate 8700 gives the best case fill at 100 %, and 61 of the 61 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 1:15.5 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.