Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 139gr | Prvi Partizan FMJ bullet and 64 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 90% | 56,246 psi | 88% | 3366 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,449 psi | 88% | 3406 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 54,085 psi | 85% | 3465 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 88% | 55,143 psi | 86% | 3465 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 88% | 57,566 psi | 90% | 3468 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 90% | 55,796 psi | 87% | 3471 fps | 98.8% |
| ADI AR 2217 | <<locked>> | 98% | 54,389 psi | 85% | 3432 fps | 99% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,924 psi | 83% | 3455 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,479 psi | 90% | 3471 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,174 psi | 90% | 3455 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,202 psi | 88% | 3468 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 54,085 psi | 85% | 3379 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 54,128 psi | 85% | 3445 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 54,636 psi | 86% | 3465 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,594 psi | 89% | 3520 fps | 96.5% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 56,956 psi | 89% | 3422 fps | 96.8% |
| Bofors RP15 | <<locked>> | 92% | 55,405 psi | 87% | 3448 fps | 99.4% |
| Bofors RP30 | <<locked>> | 96% | 54,041 psi | 85% | 3442 fps | 98.9% |
| Bofors RP5 | <<locked>> | 90% | 56,202 psi | 88% | 3468 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 96% | 55,956 psi | 88% | 3461 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 88% | 55,172 psi | 86% | 3396 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 54,215 psi | 85% | 3379 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,711 psi | 90% | 3379 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 56,869 psi | 89% | 3596 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,347 psi | 59% | 2257 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,289 psi | 88% | 3386 fps | 99.8% |
| IMR 4831 | <<locked>> | 84% | 56,811 psi | 89% | 3392 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 55,782 psi | 87% | 3383 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 90% | 53,969 psi | 85% | 3448 fps | 98.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,225 psi | 76% | 3340 fps | 97.8% |
| Lovex S065 | <<locked>> | 82% | 56,536 psi | 89% | 3366 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,926 psi | 86% | 3360 fps | 99.9% |
| Lovex S071 | <<locked>> | 94% | 54,114 psi | 85% | 3330 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,653 psi | 90% | 3448 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 49,008 psi | 77% | 3373 fps | 99.5% |
| Norma MRP | <<locked>> | 88% | 56,333 psi | 88% | 3491 fps | 100% |
| Norma URP | <<locked>> | 82% | 54,679 psi | 86% | 3383 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 55,013 psi | 86% | 3468 fps | 99% |
| Ramshot Hunter | <<locked>> | 84% | 57,493 psi | 90% | 3445 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 53,780 psi | 84% | 3389 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,290 psi | 60% | 2310 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,840 psi | 89% | 3425 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 55,303 psi | 87% | 3451 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 54,041 psi | 85% | 3510 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 53,679 psi | 84% | 3458 fps | 97.8% |
| Rottweil R 904 | <<locked>> | 86% | 54,636 psi | 86% | 3369 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 88% | 56,768 psi | 89% | 3445 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,536 psi | 89% | 3366 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,926 psi | 86% | 3360 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,492 psi | 87% | 3307 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,405 psi | 88% | 3438 fps | 99.5% |
| Somchem S361 | <<locked>> | 86% | 56,333 psi | 88% | 3353 fps | 98.4% |
| Somchem S365 | <<locked>> | 84% | 55,898 psi | 88% | 3386 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,334 psi | 90% | 3409 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 82% | 56,202 psi | 88% | 3373 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,159 psi | 90% | 3386 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 82% | 55,637 psi | 87% | 3376 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,072 psi | 88% | 3412 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 55,869 psi | 88% | 3484 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 94% | 56,710 psi | 89% | 3468 fps | 98.8% |
| Vihtavuori N568 | <<locked>> | 96% | 54,186 psi | 85% | 3461 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,043 psi | 88% | 3314 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 57,609 psi | 90% | 3530 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,377 psi | 90% | 3406 fps | 99.6% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 39,813 psi | 62% | 3038 fps | 98.5% |
| Accurate 4350 | <<locked>> | 80% | 52,663 psi | 83% | 3337 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 43,482 psi | 68% | 3235 fps | 96% |
| Accurate MAGPRO | <<locked>> | 84% | 47,732 psi | 75% | 3317 fps | 96% |
| ADI AR 2209 | <<locked>> | 80% | 43,758 psi | 69% | 3192 fps | 97.2% |
| ADI AR 2213 | <<locked>> | 82% | 42,134 psi | 66% | 3179 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 90% | 41,162 psi | 65% | 3143 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 86% | 32,648 psi | 51% | 2946 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,241 psi | 79% | 3343 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,787 psi | 69% | 3182 fps | 97.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,740 psi | 62% | 3114 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,435 psi | 60% | 3071 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,199 psi | 52% | 2963 fps | 97.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,395 psi | 68% | 3245 fps | 99.8% |
| Alliant Reloder-33 | <<locked>> | 98% | 52,359 psi | 82% | 3435 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 53,432 psi | 84% | 3353 fps | 95.9% |
| Bofors RP15 | <<locked>> | 82% | 39,595 psi | 62% | 3110 fps | 95.9% |
| Bofors RP30 | <<locked>> | 88% | 40,901 psi | 64% | 3159 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 39,740 psi | 62% | 3114 fps | 96.1% |
| Hodgdon H1000 | <<locked>> | 86% | 39,102 psi | 61% | 3091 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 82% | 44,846 psi | 70% | 3186 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 82% | 44,077 psi | 69% | 3169 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,297 psi | 74% | 3202 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 84% | 37,275 psi | 58% | 3136 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,978 psi | 44% | 2028 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,487 psi | 78% | 3255 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 49,734 psi | 78% | 3268 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,047 psi | 67% | 3117 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 84% | 43,700 psi | 68% | 3228 fps | 96.1% |
| IMR 8133 Enduron | <<locked>> | 96% | 41,930 psi | 66% | 3196 fps | 95.9% |
| Lovex S065 | <<locked>> | 80% | 53,040 psi | 83% | 3307 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,488 psi | 81% | 3297 fps | 99.7% |
| Lovex S071 | <<locked>> | 80% | 34,229 psi | 54% | 2897 fps | 96.8% |
| Norma 204 | <<locked>> | 80% | 50,154 psi | 79% | 3307 fps | 98.5% |
| Norma 217 | <<locked>> | 90% | 34,185 psi | 54% | 3012 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 42,090 psi | 66% | 3199 fps | 98.1% |
| Norma URP | <<locked>> | 80% | 51,169 psi | 80% | 3320 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 40,582 psi | 64% | 3159 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 50,169 psi | 79% | 3314 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 36,550 psi | 57% | 3015 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,660 psi | 45% | 2073 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,910 psi | 83% | 3360 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,445 psi | 81% | 3383 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 82% | 34,229 psi | 54% | 3028 fps | 95.8% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 45,745 psi | 72% | 3287 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 44,788 psi | 70% | 3166 fps | 96.4% |
| Rottweil R 905 | <<locked>> | 80% | 43,221 psi | 68% | 3169 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,040 psi | 83% | 3307 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,488 psi | 81% | 3297 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,953 psi | 81% | 3245 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,873 psi | 67% | 3163 fps | 97.1% |
| Somchem S361 | <<locked>> | 80% | 45,934 psi | 72% | 3150 fps | 96.1% |
| Somchem S365 | <<locked>> | 80% | 48,675 psi | 76% | 3264 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,758 psi | 69% | 3146 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 80% | 52,620 psi | 82% | 3310 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,087 psi | 60% | 2995 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 80% | 52,011 psi | 82% | 3310 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,859 psi | 67% | 3163 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 45,165 psi | 71% | 3261 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 86% | 42,931 psi | 67% | 3179 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 92% | 46,702 psi | 73% | 3307 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,243 psi | 82% | 3251 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,679 psi | 56% | 3100 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,219 psi | 63% | 3054 fps | 96.3% |
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 | 139gr | Prvi Partizan FMJ. Hodgdon Retumbo delivers the highest muzzle velocity at 3,596 fps; across all powders the maximum-charge window runs from 2,257 fps to 3,596 fps. ADI AR 2218 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 59–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, 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, ADI AR 2218, Alliant Reloder-50, IMR 7977 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.