Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 125gr | Nosler Ballistic Tip Hunting bullet and 71 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Ramshot Grand.
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% | 56,420 psi | 88% | 3504 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,710 psi | 89% | 3550 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 54,114 psi | 85% | 3596 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 90% | 55,274 psi | 87% | 3596 fps | 96.9% |
| ADI AR 2209 | <<locked>> | 88% | 53,998 psi | 85% | 3537 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 92% | 55,956 psi | 88% | 3606 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,375 psi | 85% | 3553 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,008 psi | 77% | 3497 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,331 psi | 85% | 3533 fps | 98.6% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,331 psi | 85% | 3533 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,725 psi | 90% | 3619 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,377 psi | 90% | 3593 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,275 psi | 88% | 3602 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,725 psi | 90% | 3579 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,638 psi | 90% | 3642 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,520 psi | 85% | 3602 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 55,448 psi | 87% | 3583 fps | 98.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,653 psi | 90% | 3638 fps | 98.8% |
| Bofors RP5 | <<locked>> | 92% | 56,275 psi | 88% | 3602 fps | 99.1% |
| Bofors RP7 | <<locked>> | 82% | 54,694 psi | 86% | 3484 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 98% | 56,086 psi | 88% | 3593 fps | 99% |
| Hodgdon H414 | <<locked>> | 82% | 54,505 psi | 85% | 3537 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 82% | 56,739 psi | 89% | 3556 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 90% | 55,695 psi | 87% | 3533 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,578 psi | 86% | 3514 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,230 psi | 85% | 3465 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,565 psi | 89% | 3727 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 82% | 55,434 psi | 87% | 3570 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,115 psi | 58% | 2362 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,797 psi | 89% | 3527 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,202 psi | 88% | 3514 fps | 99.6% |
| IMR 4831 | <<locked>> | 86% | 57,072 psi | 89% | 3537 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,376 psi | 88% | 3520 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 92% | 53,925 psi | 85% | 3576 fps | 97.8% |
| Lovex S065 | <<locked>> | 84% | 57,058 psi | 89% | 3510 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,448 psi | 87% | 3504 fps | 99.7% |
| Lovex S071 | <<locked>> | 96% | 54,114 psi | 85% | 3461 fps | 99.9% |
| Norma 204 | <<locked>> | 84% | 54,273 psi | 85% | 3517 fps | 98.5% |
| Norma 217ᴾ | <<locked>> | 100% | 44,730 psi | 70% | 3406 fps | 98% |
| Norma MRP | <<locked>> | 90% | 56,376 psi | 88% | 3625 fps | 99.7% |
| Norma URP | <<locked>> | 84% | 55,027 psi | 86% | 3527 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,940 psi | 86% | 3602 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 84% | 54,056 psi | 85% | 3520 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 94% | 53,809 psi | 84% | 3517 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,869 psi | 59% | 2415 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,072 psi | 89% | 3570 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,521 psi | 87% | 3596 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 53,896 psi | 84% | 3638 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 53,345 psi | 84% | 3573 fps | 96.9% |
| Rottweil R 904 | <<locked>> | 88% | 55,085 psi | 86% | 3507 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 90% | 56,927 psi | 89% | 3579 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 82% | 54,694 psi | 86% | 3484 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,058 psi | 89% | 3510 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,448 psi | 87% | 3504 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,376 psi | 88% | 3455 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,492 psi | 89% | 3576 fps | 99.1% |
| Somchem S361 | <<locked>> | 88% | 56,913 psi | 89% | 3488 fps | 97.7% |
| Somchem S365 | <<locked>> | 86% | 55,927 psi | 88% | 3530 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,609 psi | 90% | 3550 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 82% | 57,130 psi | 90% | 3451 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,637 psi | 89% | 3517 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,406 psi | 90% | 3524 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 84% | 56,101 psi | 88% | 3520 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,956 psi | 88% | 3550 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,985 psi | 88% | 3615 fps | 97.7% |
| Vihtavuori N565 | <<locked>> | 96% | 56,594 psi | 89% | 3593 fps | 98.1% |
| Vihtavuori N568 | <<locked>> | 98% | 53,925 psi | 85% | 3583 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,652 psi | 89% | 3458 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,679 psi | 86% | 3543 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,956 psi | 89% | 3668 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 53,722 psi | 84% | 3468 fps | 98.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 37,101 psi | 58% | 3091 fps | 96.8% |
| Accurate 4350 | <<locked>> | 80% | 49,385 psi | 77% | 3415 fps | 99.9% |
| Accurate High Country | <<locked>> | 84% | 46,789 psi | 73% | 3438 fps | 96% |
| Accurate MAGPRO | <<locked>> | 88% | 51,343 psi | 80% | 3517 fps | 96% |
| ADI AR 2209 | <<locked>> | 80% | 40,988 psi | 64% | 3248 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 86% | 45,324 psi | 71% | 3376 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 94% | 44,048 psi | 69% | 3327 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 92% | 37,246 psi | 58% | 3196 fps | 96.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,452 psi | 65% | 3248 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,452 psi | 65% | 3248 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,920 psi | 74% | 3415 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,060 psi | 64% | 3241 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 84% | 42,598 psi | 67% | 3307 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,592 psi | 56% | 3123 fps | 99.3% |
| Alliant Reloder-25 | <<locked>> | 82% | 33,069 psi | 52% | 3071 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,813 psi | 62% | 3287 fps | 98.8% |
| Bofors RP15 | <<locked>> | 86% | 42,279 psi | 66% | 3297 fps | 95.7% |
| Bofors RP30 | <<locked>> | 92% | 43,511 psi | 68% | 3340 fps | 95.5% |
| Bofors RP5 | <<locked>> | 84% | 42,598 psi | 67% | 3307 fps | 96% |
| Bofors RP7 | <<locked>> | 80% | 51,401 psi | 81% | 3419 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 90% | 42,105 psi | 66% | 3284 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 50,865 psi | 80% | 3465 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 53,185 psi | 83% | 3488 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 86% | 48,327 psi | 76% | 3386 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 86% | 47,471 psi | 74% | 3366 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,266 psi | 69% | 3278 fps | 100% |
| Hodgdon Retumbo | 103.2 gr | 88% | 39,784 psi | 62% | 3323 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 51,314 psi | 80% | 3494 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,717 psi | 43% | 2126 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,789 psi | 73% | 3330 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,707 psi | 83% | 3448 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 46,775 psi | 73% | 3343 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 84% | 46,354 psi | 73% | 3314 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 88% | 46,891 psi | 73% | 3425 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 50,314 psi | 79% | 3389 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 48,733 psi | 76% | 3373 fps | 98.9% |
| Lovex S071 | <<locked>> | 82% | 33,953 psi | 53% | 3002 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 47,181 psi | 74% | 3369 fps | 97% |
| Norma 217 | <<locked>> | 96% | 38,725 psi | 61% | 3255 fps | 96% |
| Norma MRP | <<locked>> | 80% | 38,957 psi | 61% | 3241 fps | 96.1% |
| Norma URP | <<locked>> | 80% | 48,124 psi | 75% | 3396 fps | 99.9% |
| Ramshot Grand | 103.8 gr | 86% | 43,743 psi | 69% | 3360 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 47,108 psi | 74% | 3383 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 86% | 39,305 psi | 62% | 3202 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,340 psi | 44% | 2175 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,501 psi | 78% | 3432 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,863 psi | 75% | 3451 fps | 99.8% |
| ReloadSwiss RS 76 | 107.9 gr | 86% | 36,680 psi | 57% | 3212 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 49,153 psi | 77% | 3488 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 82% | 45,136 psi | 71% | 3294 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 40,422 psi | 63% | 3222 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 51,401 psi | 81% | 3419 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,314 psi | 79% | 3389 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 48,733 psi | 76% | 3373 fps | 98.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,313 psi | 77% | 3323 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,103 psi | 63% | 3219 fps | 95.1% |
| Somchem S361 | <<locked>> | 82% | 46,267 psi | 73% | 3274 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 45,411 psi | 71% | 3343 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,046 psi | 64% | 3202 fps | 96.5% |
| Vihtavuori N150 | <<locked>> | 80% | 53,519 psi | 84% | 3392 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,559 psi | 78% | 3389 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 82% | 38,130 psi | 60% | 3114 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 49,023 psi | 77% | 3389 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 39,900 psi | 63% | 3222 fps | 99.2% |
| Vihtavuori N560 | <<locked>> | 86% | 48,457 psi | 76% | 3461 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 90% | 45,818 psi | 72% | 3369 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 96% | 49,966 psi | 78% | 3497 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,139 psi | 77% | 3333 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,053 psi | 80% | 3471 fps | 99.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,111 psi | 50% | 3130 fps | 99.4% |
| Winchester Supreme 780 | <<locked>> | 82% | 40,437 psi | 63% | 3179 fps | 95.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 71 powders for .30-378 Weath. Mag. loaded with the .308 | 125gr | Nosler Ballistic Tip Hunting. 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 71 of the 71 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. Hodgdon Retumbo, ReloadSwiss RS 76, Ramshot Grand rank at the top here: for .30-378 Weath. Mag. with the .308 | 125gr | Nosler Ballistic Tip Hunting they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.