Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 125gr | Berger Target FB bullet and 70 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% | 56,463 psi | 88% | 3504 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,942 psi | 89% | 3553 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 54,143 psi | 85% | 3596 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 90% | 55,347 psi | 87% | 3596 fps | 96.9% |
| ADI AR 2209 | <<locked>> | 88% | 54,186 psi | 85% | 3540 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 92% | 56,159 psi | 88% | 3609 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,549 psi | 85% | 3556 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,168 psi | 77% | 3504 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,404 psi | 85% | 3537 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 84% | 53,969 psi | 85% | 3553 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,566 psi | 90% | 3596 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,463 psi | 88% | 3606 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,740 psi | 90% | 3579 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 53,969 psi | 85% | 3579 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,607 psi | 86% | 3602 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 55,463 psi | 87% | 3583 fps | 98.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,696 psi | 90% | 3638 fps | 98.8% |
| Bofors RP5 | <<locked>> | 92% | 56,463 psi | 88% | 3606 fps | 99.1% |
| Bofors RP7 | <<locked>> | 82% | 54,882 psi | 86% | 3484 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 98% | 56,086 psi | 88% | 3589 fps | 99% |
| Hodgdon H414 | <<locked>> | 82% | 54,563 psi | 86% | 3540 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 82% | 56,913 psi | 89% | 3560 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 90% | 55,709 psi | 87% | 3533 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,592 psi | 86% | 3514 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,302 psi | 85% | 3465 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,594 psi | 89% | 3727 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 82% | 55,448 psi | 87% | 3570 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,057 psi | 58% | 2362 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,826 psi | 89% | 3527 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,231 psi | 88% | 3514 fps | 99.6% |
| IMR 4831 | <<locked>> | 86% | 57,130 psi | 90% | 3537 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,391 psi | 88% | 3520 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 92% | 54,143 psi | 85% | 3576 fps | 97.8% |
| Lovex S065 | <<locked>> | 84% | 57,087 psi | 89% | 3514 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,477 psi | 87% | 3504 fps | 99.7% |
| Lovex S071 | <<locked>> | 96% | 54,157 psi | 85% | 3461 fps | 99.9% |
| Norma 204 | <<locked>> | 84% | 54,447 psi | 85% | 3520 fps | 98.5% |
| Norma 217ᴾ | <<locked>> | 100% | 44,947 psi | 70% | 3412 fps | 98.1% |
| Norma MRP | <<locked>> | 90% | 56,420 psi | 88% | 3625 fps | 99.7% |
| Norma URP | <<locked>> | 84% | 55,100 psi | 86% | 3527 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,955 psi | 86% | 3599 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 84% | 54,273 psi | 85% | 3527 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 94% | 53,809 psi | 84% | 3520 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,942 psi | 59% | 2415 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,101 psi | 89% | 3566 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,767 psi | 87% | 3599 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 53,925 psi | 85% | 3638 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 53,403 psi | 84% | 3573 fps | 96.9% |
| Rottweil R 904 | <<locked>> | 88% | 55,100 psi | 86% | 3507 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 90% | 57,145 psi | 90% | 3583 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 82% | 54,882 psi | 86% | 3484 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,087 psi | 89% | 3514 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,477 psi | 87% | 3504 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,405 psi | 88% | 3455 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,724 psi | 89% | 3576 fps | 99.1% |
| Somchem S361 | <<locked>> | 88% | 56,913 psi | 89% | 3488 fps | 97.7% |
| Somchem S365 | <<locked>> | 86% | 55,956 psi | 88% | 3530 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,653 psi | 90% | 3550 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 82% | 57,174 psi | 90% | 3451 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,826 psi | 89% | 3520 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,479 psi | 90% | 3524 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 84% | 56,130 psi | 88% | 3520 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,014 psi | 88% | 3550 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,999 psi | 88% | 3615 fps | 97.7% |
| Vihtavuori N565 | <<locked>> | 96% | 56,666 psi | 89% | 3593 fps | 98.1% |
| Vihtavuori N568 | <<locked>> | 98% | 53,983 psi | 85% | 3583 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,666 psi | 89% | 3458 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,708 psi | 86% | 3540 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,985 psi | 89% | 3668 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 53,940 psi | 85% | 3471 fps | 98.6% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 37,130 psi | 58% | 3091 fps | 96.8% |
| Accurate 4350 | <<locked>> | 80% | 49,429 psi | 77% | 3412 fps | 99.9% |
| Accurate High Country | <<locked>> | 84% | 46,818 psi | 73% | 3438 fps | 96% |
| Accurate MAGPRO | <<locked>> | 88% | 51,387 psi | 81% | 3517 fps | 96% |
| ADI AR 2209 | <<locked>> | 80% | 41,060 psi | 64% | 3248 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 86% | 45,368 psi | 71% | 3379 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 94% | 44,077 psi | 69% | 3327 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 92% | 37,275 psi | 58% | 3196 fps | 96.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,481 psi | 65% | 3248 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,152 psi | 74% | 3422 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,104 psi | 64% | 3241 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 84% | 42,627 psi | 67% | 3307 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,636 psi | 56% | 3123 fps | 99.3% |
| Alliant Reloder-25 | <<locked>> | 82% | 33,098 psi | 52% | 3071 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,900 psi | 63% | 3287 fps | 98.8% |
| Bofors RP15 | <<locked>> | 86% | 42,351 psi | 66% | 3297 fps | 95.7% |
| Bofors RP30 | <<locked>> | 92% | 43,555 psi | 68% | 3340 fps | 95.5% |
| Bofors RP5 | <<locked>> | 84% | 42,627 psi | 67% | 3307 fps | 96% |
| Bofors RP7 | <<locked>> | 80% | 51,445 psi | 81% | 3422 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 90% | 42,119 psi | 66% | 3284 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 50,937 psi | 80% | 3468 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 53,214 psi | 83% | 3488 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 86% | 48,356 psi | 76% | 3386 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 86% | 47,543 psi | 75% | 3369 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,309 psi | 69% | 3278 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 39,798 psi | 62% | 3323 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 51,372 psi | 81% | 3491 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,789 psi | 44% | 2126 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,833 psi | 73% | 3327 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,750 psi | 83% | 3451 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 46,818 psi | 73% | 3343 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 84% | 46,383 psi | 73% | 3314 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 88% | 46,920 psi | 74% | 3425 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 50,357 psi | 79% | 3386 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 48,776 psi | 76% | 3373 fps | 98.9% |
| Lovex S071 | <<locked>> | 82% | 33,982 psi | 53% | 3002 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 47,210 psi | 74% | 3369 fps | 97% |
| Norma 217 | <<locked>> | 96% | 38,885 psi | 61% | 3258 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 38,986 psi | 61% | 3241 fps | 96.1% |
| Norma URP | <<locked>> | 80% | 48,196 psi | 76% | 3396 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 43,816 psi | 69% | 3356 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 47,152 psi | 74% | 3383 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 86% | 39,450 psi | 62% | 3209 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,413 psi | 45% | 2175 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,690 psi | 78% | 3432 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,950 psi | 75% | 3451 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 36,738 psi | 58% | 3215 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 49,327 psi | 77% | 3488 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 82% | 45,223 psi | 71% | 3297 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 40,480 psi | 63% | 3225 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 51,445 psi | 81% | 3422 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,357 psi | 79% | 3386 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 48,776 psi | 76% | 3373 fps | 98.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,342 psi | 77% | 3323 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,147 psi | 63% | 3215 fps | 95.1% |
| Somchem S361 | <<locked>> | 82% | 46,441 psi | 73% | 3278 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 45,455 psi | 71% | 3340 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,075 psi | 64% | 3202 fps | 96.5% |
| Vihtavuori N150 | <<locked>> | 80% | 53,563 psi | 84% | 3392 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,603 psi | 78% | 3389 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 82% | 38,159 psi | 60% | 3114 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 49,052 psi | 77% | 3386 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 39,943 psi | 63% | 3222 fps | 99.2% |
| Vihtavuori N560 | <<locked>> | 86% | 48,631 psi | 76% | 3465 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 90% | 45,847 psi | 72% | 3369 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 96% | 50,024 psi | 78% | 3497 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,182 psi | 77% | 3333 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,097 psi | 80% | 3468 fps | 99.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,169 psi | 50% | 3130 fps | 99.4% |
| Winchester Supreme 780 | <<locked>> | 82% | 40,466 psi | 63% | 3179 fps | 95.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 70 powders for .30-378 Weath. Mag. loaded with the .308 | 125gr | Berger Target FB. Hodgdon Retumbo delivers the highest muzzle velocity at 3,727 fps; across all powders the maximum-charge window runs from 2,362 fps to 3,727 fps. ADI AR 2217 gives the best case fill at 100 %, and 70 of the 70 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 1:14.5 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.