Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 125gr | Remington PSP bullet and 70 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 Accurate High Country.
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% | 56,695 psi | 89% | 3507 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,043 psi | 89% | 3553 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 54,447 psi | 85% | 3602 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 90% | 55,564 psi | 87% | 3599 fps | 97% |
| ADI AR 2209 | <<locked>> | 88% | 54,447 psi | 85% | 3547 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 92% | 56,405 psi | 88% | 3615 fps | 98.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,781 psi | 86% | 3563 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,385 psi | 77% | 3507 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,650 psi | 86% | 3540 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,259 psi | 85% | 3560 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 54,027 psi | 85% | 3527 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,695 psi | 89% | 3609 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 92% | 54,346 psi | 85% | 3520 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 54,230 psi | 85% | 3579 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 55,013 psi | 86% | 3609 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 55,869 psi | 88% | 3593 fps | 98.9% |
| Bofors RP30 | <<locked>> | 98% | 54,099 psi | 85% | 3573 fps | 98.3% |
| Bofors RP5 | <<locked>> | 92% | 56,695 psi | 89% | 3609 fps | 99.1% |
| Bofors RP7 | <<locked>> | 82% | 55,013 psi | 86% | 3488 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 98% | 56,507 psi | 89% | 3596 fps | 99% |
| Hodgdon H414 | <<locked>> | 82% | 54,824 psi | 86% | 3543 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 82% | 57,014 psi | 89% | 3563 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 90% | 55,941 psi | 88% | 3537 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,810 psi | 86% | 3517 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,563 psi | 86% | 3468 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 57,029 psi | 89% | 3734 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 82% | 55,695 psi | 87% | 3573 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,130 psi | 58% | 2365 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,072 psi | 89% | 3530 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,333 psi | 88% | 3517 fps | 99.7% |
| IMR 4831 | <<locked>> | 86% | 57,406 psi | 90% | 3540 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,608 psi | 89% | 3524 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 92% | 54,389 psi | 85% | 3583 fps | 97.9% |
| Lovex S065 | <<locked>> | 84% | 57,305 psi | 90% | 3517 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,753 psi | 87% | 3507 fps | 99.7% |
| Lovex S071 | <<locked>> | 96% | 54,418 psi | 85% | 3468 fps | 99.9% |
| Norma 204 | <<locked>> | 84% | 54,563 psi | 86% | 3520 fps | 98.6% |
| Norma 217ᴾ | <<locked>> | 100% | 45,165 psi | 71% | 3412 fps | 98.2% |
| Norma MRP | <<locked>> | 90% | 56,811 psi | 89% | 3632 fps | 99.8% |
| Norma URP | <<locked>> | 84% | 55,361 psi | 87% | 3533 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 55,390 psi | 87% | 3609 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 84% | 54,331 psi | 85% | 3524 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 94% | 54,273 psi | 85% | 3527 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,014 psi | 60% | 2418 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,377 psi | 90% | 3573 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,028 psi | 88% | 3606 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 54,317 psi | 85% | 3645 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 53,809 psi | 84% | 3583 fps | 97% |
| Rottweil R 904 | <<locked>> | 88% | 55,347 psi | 87% | 3510 fps | 98% |
| Rottweil R 905 | <<locked>> | 90% | 57,406 psi | 90% | 3586 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 82% | 55,013 psi | 86% | 3488 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,305 psi | 90% | 3517 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,753 psi | 87% | 3507 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,681 psi | 89% | 3461 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,971 psi | 89% | 3579 fps | 99.1% |
| Somchem S361 | <<locked>> | 88% | 57,290 psi | 90% | 3494 fps | 97.8% |
| Somchem S365 | <<locked>> | 86% | 56,260 psi | 88% | 3533 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 54,085 psi | 85% | 3481 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 82% | 57,305 psi | 90% | 3455 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,956 psi | 89% | 3520 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 53,954 psi | 85% | 3458 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 84% | 56,391 psi | 88% | 3524 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,289 psi | 88% | 3556 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 56,405 psi | 88% | 3622 fps | 97.8% |
| Vihtavuori N565 | <<locked>> | 96% | 57,043 psi | 89% | 3599 fps | 98.1% |
| Vihtavuori N568 | <<locked>> | 98% | 54,346 psi | 85% | 3586 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,898 psi | 89% | 3461 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,984 psi | 86% | 3543 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 94% | 57,305 psi | 90% | 3671 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 54,143 psi | 85% | 3474 fps | 98.7% |
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% | 37,260 psi | 58% | 3094 fps | 96.9% |
| Accurate 4350 | <<locked>> | 80% | 49,559 psi | 78% | 3415 fps | 100% |
| Accurate High Country | 100.3 gr | 82% | 43,816 psi | 69% | 3366 fps | 95% |
| Accurate MAGPRO | <<locked>> | 86% | 47,950 psi | 75% | 3442 fps | 95% |
| ADI AR 2209 | <<locked>> | 80% | 41,147 psi | 64% | 3248 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 86% | 45,600 psi | 71% | 3383 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 94% | 44,396 psi | 70% | 3337 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 90% | 34,940 psi | 55% | 3123 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,597 psi | 65% | 3251 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,253 psi | 74% | 3425 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,220 psi | 65% | 3245 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 82% | 39,900 psi | 63% | 3238 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,766 psi | 56% | 3127 fps | 99.3% |
| Alliant Reloder-25 | <<locked>> | 82% | 33,315 psi | 52% | 3077 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,161 psi | 63% | 3294 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 42,554 psi | 67% | 3304 fps | 95.8% |
| Bofors RP30 | <<locked>> | 92% | 43,772 psi | 69% | 3346 fps | 95.6% |
| Bofors RP5 | <<locked>> | 82% | 39,900 psi | 63% | 3238 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 51,532 psi | 81% | 3422 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 90% | 42,308 psi | 66% | 3287 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 51,184 psi | 80% | 3474 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 53,490 psi | 84% | 3494 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 86% | 48,588 psi | 76% | 3392 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 86% | 47,718 psi | 75% | 3373 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,556 psi | 70% | 3281 fps | 100% |
| Hodgdon Retumbo | 103.7 gr | 88% | 40,016 psi | 63% | 3330 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 51,619 psi | 81% | 3497 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,789 psi | 44% | 2126 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,920 psi | 74% | 3333 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,852 psi | 83% | 3451 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 46,934 psi | 74% | 3346 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 46,615 psi | 73% | 3317 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 88% | 47,152 psi | 74% | 3432 fps | 96.1% |
| Lovex S065 | <<locked>> | 80% | 50,473 psi | 79% | 3389 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 48,863 psi | 77% | 3373 fps | 99% |
| Lovex S071 | <<locked>> | 82% | 34,214 psi | 54% | 3009 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 47,471 psi | 74% | 3376 fps | 97.1% |
| Norma 217 | <<locked>> | 94% | 36,419 psi | 57% | 3186 fps | 95% |
| Norma MRP | <<locked>> | 80% | 39,247 psi | 62% | 3248 fps | 96.3% |
| Norma URP | <<locked>> | 80% | 48,327 psi | 76% | 3399 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 44,048 psi | 69% | 3363 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 47,413 psi | 74% | 3386 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 86% | 39,653 psi | 62% | 3212 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,398 psi | 45% | 2175 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,777 psi | 78% | 3432 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,167 psi | 75% | 3455 fps | 99.8% |
| ReloadSwiss RS 76 | 108.4 gr | 86% | 36,912 psi | 58% | 3219 fps | 95.8% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 49,559 psi | 78% | 3494 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 82% | 45,295 psi | 71% | 3297 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 40,596 psi | 64% | 3225 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 51,532 psi | 81% | 3422 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,473 psi | 79% | 3389 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 48,863 psi | 77% | 3373 fps | 99% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,603 psi | 78% | 3327 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,263 psi | 63% | 3219 fps | 95.2% |
| Somchem S361 | <<locked>> | 82% | 46,644 psi | 73% | 3284 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 45,571 psi | 71% | 3343 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,307 psi | 65% | 3209 fps | 96.6% |
| Vihtavuori N150 | <<locked>> | 80% | 53,679 psi | 84% | 3396 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,734 psi | 78% | 3392 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 82% | 38,348 psi | 60% | 3117 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 49,313 psi | 77% | 3392 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 40,059 psi | 63% | 3222 fps | 99.2% |
| Vihtavuori N560 | <<locked>> | 86% | 48,863 psi | 77% | 3468 fps | 96% |
| Vihtavuori N565 | <<locked>> | 90% | 46,079 psi | 72% | 3373 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 96% | 50,372 psi | 79% | 3504 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,414 psi | 77% | 3337 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,329 psi | 80% | 3474 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,445 psi | 51% | 3136 fps | 99.5% |
| Winchester Supreme 780 | <<locked>> | 82% | 40,698 psi | 64% | 3186 fps | 95.3% |
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 70 powders for .30-378 Weath. Mag. loaded with the .308 | 125gr | Remington PSP. Hodgdon Retumbo delivers the highest muzzle velocity at 3,734 fps; across all powders the maximum-charge window runs from 2,365 fps to 3,734 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 1:15.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Hodgdon TrailBoss 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, Accurate High Country rank at the top here: for .30-378 Weath. Mag. with the .308 | 125gr | Remington PSP 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.