Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 115gr | Berger Target FB bullet and 71 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% | 54,157 psi | 85% | 3560 fps | 99.7% |
| Accurate 4350 | <<locked>> | 84% | 54,549 psi | 85% | 3615 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 55,593 psi | 87% | 3724 fps | 97.5% |
| Accurate MAGPRO | <<locked>> | 92% | 56,840 psi | 89% | 3724 fps | 96.6% |
| ADI AR 2209 | <<locked>> | 90% | 55,680 psi | 87% | 3668 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 94% | 57,711 psi | 90% | 3737 fps | 97.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 52,127 psi | 82% | 3599 fps | 97.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 46,949 psi | 74% | 3540 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 55,347 psi | 87% | 3688 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,739 psi | 89% | 3701 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 55,303 psi | 87% | 3652 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 92% | 54,114 psi | 85% | 3661 fps | 98.3% |
| Alliant Reloder-23 | <<locked>> | 94% | 55,303 psi | 87% | 3645 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 55,085 psi | 86% | 3701 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 56,231 psi | 88% | 3734 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 57,000 psi | 89% | 3711 fps | 98.6% |
| Bofors RP30ᴾ | <<locked>> | 100% | 55,042 psi | 86% | 3684 fps | 97.9% |
| Bofors RP5 | <<locked>> | 92% | 54,114 psi | 85% | 3661 fps | 98.3% |
| Bofors RP7 | <<locked>> | 84% | 56,579 psi | 89% | 3619 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 98% | 53,737 psi | 84% | 3638 fps | 98% |
| Hodgdon H414 | <<locked>> | 84% | 56,260 psi | 88% | 3671 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 82% | 54,882 psi | 86% | 3622 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 92% | 57,508 psi | 90% | 3665 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 92% | 56,347 psi | 88% | 3642 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,695 psi | 87% | 3596 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 53,983 psi | 85% | 3773 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 84% | 57,406 psi | 90% | 3707 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,869 psi | 58% | 2451 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,911 psi | 86% | 3593 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 82% | 54,404 psi | 85% | 3583 fps | 99.1% |
| IMR 4831 | <<locked>> | 86% | 54,984 psi | 86% | 3606 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 54,433 psi | 85% | 3576 fps | 96.7% |
| IMR 7828 SSC | <<locked>> | 94% | 55,550 psi | 87% | 3704 fps | 97.5% |
| Lovex S065 | <<locked>> | 84% | 55,288 psi | 87% | 3586 fps | 99.8% |
| Lovex S070 | <<locked>> | 86% | 57,159 psi | 90% | 3635 fps | 99.6% |
| Lovex S071 | <<locked>> | 98% | 55,448 psi | 87% | 3583 fps | 99.8% |
| Norma 204 | <<locked>> | 86% | 56,159 psi | 88% | 3655 fps | 98.3% |
| Norma 217ᴾ | <<locked>> | 100% | 42,395 psi | 66% | 3438 fps | 96.6% |
| Norma MRP | <<locked>> | 90% | 53,896 psi | 84% | 3681 fps | 99.2% |
| Norma URP | <<locked>> | 86% | 56,710 psi | 89% | 3665 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,608 psi | 89% | 3730 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 86% | 55,811 psi | 87% | 3655 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 96% | 55,535 psi | 87% | 3645 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,695 psi | 59% | 2503 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,926 psi | 86% | 3635 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 57,406 psi | 90% | 3737 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 55,506 psi | 87% | 3766 fps | 99.9% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 55,013 psi | 86% | 3694 fps | 96.5% |
| Rottweil R 904 | <<locked>> | 90% | 56,724 psi | 89% | 3635 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 90% | 54,795 psi | 86% | 3638 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 84% | 56,579 psi | 89% | 3619 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 84% | 55,288 psi | 87% | 3586 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 57,159 psi | 90% | 3635 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,348 psi | 90% | 3488 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,505 psi | 85% | 3520 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,360 psi | 85% | 3632 fps | 98.2% |
| Somchem S355 | <<locked>> | 82% | 57,377 psi | 90% | 3625 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 54,926 psi | 86% | 3543 fps | 96.6% |
| Somchem S365 | <<locked>> | 88% | 57,566 psi | 90% | 3665 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 55,506 psi | 87% | 3609 fps | 99% |
| Vihtavuori N150 | <<locked>> | 82% | 55,230 psi | 87% | 3530 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,607 psi | 86% | 3589 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 55,216 psi | 87% | 3579 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 84% | 54,114 psi | 85% | 3589 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 57,290 psi | 90% | 3678 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 57,682 psi | 90% | 3743 fps | 97.4% |
| Vihtavuori N565 | <<locked>> | 96% | 54,230 psi | 85% | 3642 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,636 psi | 86% | 3530 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 56,405 psi | 88% | 3678 fps | 99.4% |
| Winchester StaBALL HD | <<locked>> | 94% | 53,795 psi | 84% | 3724 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 55,666 psi | 87% | 3599 fps | 98.4% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 35,433 psi | 56% | 3133 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 47,340 psi | 74% | 3471 fps | 99.6% |
| Accurate High Country | <<locked>> | 86% | 48,109 psi | 75% | 3563 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 90% | 52,837 psi | 83% | 3645 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 84% | 45,252 psi | 71% | 3445 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 90% | 50,140 psi | 79% | 3583 fps | 96% |
| ADI AR 2217 | <<locked>> | 96% | 45,368 psi | 71% | 3445 fps | 95% |
| ADI AR 2225 | <<locked>> | 94% | 38,058 psi | 60% | 3301 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,020 psi | 71% | 3478 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,678 psi | 83% | 3632 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 45,194 psi | 71% | 3435 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 86% | 43,772 psi | 69% | 3428 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,837 psi | 53% | 3163 fps | 98.3% |
| Alliant Reloder-25 | <<locked>> | 84% | 33,881 psi | 53% | 3179 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,724 psi | 59% | 3327 fps | 97.6% |
| Bofors RP15 | <<locked>> | 88% | 43,294 psi | 68% | 3412 fps | 95.2% |
| Bofors RP30 | <<locked>> | 96% | 47,776 psi | 75% | 3533 fps | 96.1% |
| Bofors RP5 | <<locked>> | 86% | 43,772 psi | 69% | 3428 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 49,574 psi | 78% | 3481 fps | 98% |
| Hodgdon H1000 | <<locked>> | 94% | 46,499 psi | 73% | 3478 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 80% | 48,907 psi | 77% | 3524 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 51,300 psi | 80% | 3550 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 88% | 49,835 psi | 78% | 3510 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 48,979 psi | 77% | 3494 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,482 psi | 67% | 3337 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 90% | 40,727 psi | 64% | 3438 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 49,327 psi | 77% | 3547 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,615 psi | 43% | 2208 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,150 psi | 71% | 3386 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,068 psi | 80% | 3514 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 44,918 psi | 70% | 3402 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 51,082 psi | 80% | 3507 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 90% | 48,211 psi | 76% | 3547 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 48,530 psi | 76% | 3451 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 47,007 psi | 74% | 3432 fps | 98.1% |
| Lovex S071 | <<locked>> | 86% | 37,072 psi | 58% | 3179 fps | 96% |
| Norma 204 | <<locked>> | 80% | 45,469 psi | 71% | 3428 fps | 95.8% |
| Norma 217 | <<locked>> | 98% | 39,494 psi | 62% | 3360 fps | 95.4% |
| Norma MRP | <<locked>> | 82% | 40,118 psi | 63% | 3363 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 46,282 psi | 73% | 3458 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 48,515 psi | 76% | 3560 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 45,353 psi | 71% | 3438 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 88% | 40,509 psi | 63% | 3320 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,195 psi | 44% | 2257 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,500 psi | 74% | 3488 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,832 psi | 72% | 3507 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 37,811 psi | 59% | 3327 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 50,647 psi | 79% | 3609 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 84% | 46,456 psi | 73% | 3422 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 84% | 44,585 psi | 70% | 3419 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 49,574 psi | 78% | 3481 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,530 psi | 76% | 3451 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 80% | 47,007 psi | 74% | 3432 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,722 psi | 84% | 3432 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,659 psi | 75% | 3386 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 44,208 psi | 69% | 3412 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 53,838 psi | 84% | 3563 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 51,329 psi | 80% | 3474 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 43,395 psi | 68% | 3402 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,349 psi | 62% | 3248 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 51,735 psi | 81% | 3468 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,703 psi | 75% | 3455 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 42,032 psi | 66% | 3297 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 47,166 psi | 74% | 3448 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 37,956 psi | 59% | 3268 fps | 98.3% |
| Vihtavuori N560 | <<locked>> | 88% | 49,951 psi | 78% | 3589 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 94% | 50,517 psi | 79% | 3563 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,282 psi | 74% | 3399 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,168 psi | 77% | 3530 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,327 psi | 48% | 3156 fps | 98.2% |
| Winchester Supreme 780 | <<locked>> | 86% | 44,773 psi | 70% | 3376 fps | 95.9% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 77 powders for .30-378 Weath. Mag. loaded with the .308 | 115gr | Berger Target FB. Hodgdon Retumbo delivers the highest muzzle velocity at 3,773 fps; across all powders the maximum-charge window runs from 2,451 fps to 3,773 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 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 115.0 gr projectile in 0.308" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-33 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, Alliant Reloder-33, Baschieri & Pellagri 109, IMR 8133 Enduron 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.