Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 125gr | Nosler AccuBond bullet and 69 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>> | 92% | 56,057 psi | 88% | 3497 fps | 99.9% |
| Accurate 4350 | <<locked>> | 84% | 56,492 psi | 89% | 3547 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 57,725 psi | 90% | 3665 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 90% | 54,926 psi | 86% | 3593 fps | 96.9% |
| ADI AR 2209 | <<locked>> | 90% | 57,609 psi | 90% | 3602 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 92% | 55,767 psi | 87% | 3602 fps | 98% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,070 psi | 85% | 3547 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,733 psi | 76% | 3494 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,305 psi | 90% | 3612 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,188 psi | 90% | 3589 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,072 psi | 88% | 3599 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,319 psi | 90% | 3573 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,276 psi | 90% | 3635 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,128 psi | 85% | 3596 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 55,085 psi | 86% | 3579 fps | 98.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,319 psi | 90% | 3632 fps | 98.8% |
| Bofors RP5 | <<locked>> | 92% | 56,072 psi | 88% | 3599 fps | 99% |
| Bofors RP7 | <<locked>> | 82% | 54,505 psi | 85% | 3481 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 98% | 55,767 psi | 87% | 3583 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 82% | 54,317 psi | 85% | 3533 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 82% | 56,521 psi | 89% | 3553 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 90% | 55,347 psi | 87% | 3527 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,230 psi | 85% | 3507 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,653 psi | 90% | 3517 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,202 psi | 88% | 3717 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 82% | 55,056 psi | 86% | 3566 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,072 psi | 58% | 2359 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,579 psi | 89% | 3524 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,985 psi | 88% | 3510 fps | 99.6% |
| IMR 4831 | <<locked>> | 86% | 56,898 psi | 89% | 3537 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,086 psi | 88% | 3514 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 94% | 57,711 psi | 90% | 3648 fps | 98.4% |
| Lovex S065 | <<locked>> | 84% | 56,811 psi | 89% | 3510 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,216 psi | 87% | 3501 fps | 99.7% |
| Lovex S071 | <<locked>> | 98% | 57,406 psi | 90% | 3520 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,085 psi | 85% | 3514 fps | 98.5% |
| Norma 217ᴾ | <<locked>> | 100% | 44,411 psi | 70% | 3399 fps | 97.9% |
| Norma MRP | <<locked>> | 90% | 55,985 psi | 88% | 3619 fps | 99.7% |
| Norma URP | <<locked>> | 84% | 54,824 psi | 86% | 3527 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,563 psi | 86% | 3593 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 86% | 57,667 psi | 90% | 3586 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 57,725 psi | 90% | 3586 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,942 psi | 59% | 2415 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,840 psi | 89% | 3566 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,317 psi | 87% | 3593 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 53,374 psi | 84% | 3629 fps | 99.9% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 57,246 psi | 90% | 3648 fps | 97.7% |
| Rottweil R 904 | <<locked>> | 88% | 54,752 psi | 86% | 3497 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 90% | 56,739 psi | 89% | 3576 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 82% | 54,505 psi | 85% | 3481 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,811 psi | 89% | 3510 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,216 psi | 87% | 3501 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,057 psi | 88% | 3448 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,304 psi | 88% | 3573 fps | 99% |
| Somchem S361 | <<locked>> | 88% | 56,608 psi | 89% | 3481 fps | 97.6% |
| Somchem S365 | <<locked>> | 86% | 55,651 psi | 87% | 3527 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,261 psi | 90% | 3540 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 82% | 56,927 psi | 89% | 3448 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,391 psi | 88% | 3514 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,072 psi | 89% | 3517 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 84% | 55,767 psi | 87% | 3517 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,564 psi | 87% | 3547 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,622 psi | 87% | 3609 fps | 97.6% |
| Vihtavuori N565 | <<locked>> | 96% | 56,260 psi | 88% | 3586 fps | 98% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,725 psi | 90% | 3655 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,304 psi | 88% | 3455 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,462 psi | 85% | 3537 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,463 psi | 88% | 3661 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,406 psi | 90% | 3533 fps | 99.1% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 36,869 psi | 58% | 3084 fps | 96.7% |
| Accurate 4350 | <<locked>> | 80% | 49,124 psi | 77% | 3412 fps | 99.9% |
| Accurate High Country | <<locked>> | 84% | 46,586 psi | 73% | 3435 fps | 95.9% |
| Accurate MAGPRO | <<locked>> | 88% | 51,024 psi | 80% | 3510 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 40,785 psi | 64% | 3241 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 86% | 45,005 psi | 71% | 3369 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 94% | 43,772 psi | 69% | 3320 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 92% | 36,999 psi | 58% | 3189 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,673 psi | 73% | 3412 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,886 psi | 64% | 3235 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 84% | 42,409 psi | 66% | 3304 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,273 psi | 55% | 3117 fps | 99.2% |
| Alliant Reloder-25 | <<locked>> | 82% | 32,909 psi | 52% | 3068 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,494 psi | 62% | 3281 fps | 98.7% |
| Bofors RP15 | <<locked>> | 86% | 41,959 psi | 66% | 3287 fps | 95.6% |
| Bofors RP30 | <<locked>> | 92% | 43,192 psi | 68% | 3337 fps | 95.4% |
| Bofors RP5 | <<locked>> | 84% | 42,409 psi | 66% | 3304 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 51,198 psi | 80% | 3415 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 90% | 41,814 psi | 66% | 3278 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 50,676 psi | 79% | 3465 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 52,982 psi | 83% | 3484 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 86% | 48,153 psi | 75% | 3383 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 47,166 psi | 74% | 3360 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,034 psi | 69% | 3271 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 39,494 psi | 62% | 3317 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 51,140 psi | 80% | 3491 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,760 psi | 44% | 2123 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,601 psi | 73% | 3323 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,504 psi | 82% | 3445 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 46,543 psi | 73% | 3340 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 84% | 46,209 psi | 72% | 3307 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 88% | 46,586 psi | 73% | 3415 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 49,980 psi | 78% | 3383 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 48,486 psi | 76% | 3366 fps | 98.9% |
| Lovex S071 | <<locked>> | 82% | 33,750 psi | 53% | 2995 fps | 95.4% |
| Norma 204 | <<locked>> | 80% | 46,992 psi | 74% | 3366 fps | 97% |
| Norma 217 | <<locked>> | 96% | 38,435 psi | 60% | 3248 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 38,725 psi | 61% | 3235 fps | 96% |
| Norma URP | <<locked>> | 80% | 47,906 psi | 75% | 3392 fps | 99.8% |
| Ramshot Grand | <<locked>> | 86% | 43,439 psi | 68% | 3350 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 46,905 psi | 74% | 3376 fps | 99% |
| Ramshot Magnum | <<locked>> | 86% | 39,117 psi | 61% | 3199 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,355 psi | 44% | 2172 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,255 psi | 77% | 3425 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,514 psi | 74% | 3445 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 36,448 psi | 57% | 3205 fps | 95.5% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 48,791 psi | 76% | 3478 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 82% | 44,831 psi | 70% | 3291 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 80% | 40,219 psi | 63% | 3219 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 51,198 psi | 80% | 3415 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,980 psi | 78% | 3383 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 48,486 psi | 76% | 3366 fps | 98.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,124 psi | 77% | 3320 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,885 psi | 63% | 3212 fps | 95% |
| Somchem S361 | <<locked>> | 82% | 46,137 psi | 72% | 3271 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 45,165 psi | 71% | 3337 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,857 psi | 64% | 3199 fps | 96.4% |
| Vihtavuori N150 | <<locked>> | 80% | 53,301 psi | 84% | 3389 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,356 psi | 77% | 3386 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 82% | 37,927 psi | 59% | 3107 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 48,834 psi | 77% | 3383 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 39,653 psi | 62% | 3215 fps | 99.2% |
| Vihtavuori N560 | <<locked>> | 86% | 48,254 psi | 76% | 3455 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 90% | 45,484 psi | 71% | 3360 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 96% | 49,661 psi | 78% | 3494 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,805 psi | 76% | 3327 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,807 psi | 80% | 3465 fps | 99.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 31,850 psi | 50% | 3127 fps | 99.4% |
| Winchester Supreme 780 | <<locked>> | 82% | 40,234 psi | 63% | 3173 fps | 95.1% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 69 powders for .30-378 Weath. Mag. loaded with the .308 | 125gr | Nosler AccuBond. Hodgdon Retumbo delivers the highest muzzle velocity at 3,717 fps; across all powders the maximum-charge window runs from 2,359 fps to 3,717 fps. ADI AR 2217 gives the best case fill at 100 %, and 69 of the 69 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 125.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Bofors RP30 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.