Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 139gr | RWS Evolution Green 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 Accurate MAGPRO.
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% | 56,173 psi | 88% | 3369 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,826 psi | 89% | 3415 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 54,157 psi | 85% | 3471 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 90% | 55,288 psi | 87% | 3474 fps | 97.7% |
| ADI AR 2209 | <<locked>> | 88% | 54,331 psi | 85% | 3415 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 92% | 56,260 psi | 88% | 3484 fps | 98.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,505 psi | 85% | 3438 fps | 98.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,095 psi | 77% | 3383 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,259 psi | 85% | 3402 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,201 psi | 85% | 3419 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,711 psi | 90% | 3468 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,405 psi | 88% | 3474 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 92% | 54,157 psi | 85% | 3386 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 54,012 psi | 85% | 3448 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,621 psi | 86% | 3471 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 55,579 psi | 87% | 3461 fps | 99.3% |
| Bofors RP30 | <<locked>> | 98% | 53,766 psi | 84% | 3442 fps | 98.8% |
| Bofors RP5 | <<locked>> | 92% | 56,405 psi | 88% | 3474 fps | 99.5% |
| Bofors RP7 | <<locked>> | 82% | 54,824 psi | 86% | 3353 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 98% | 56,246 psi | 88% | 3468 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 82% | 54,694 psi | 86% | 3409 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 82% | 57,029 psi | 89% | 3428 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 90% | 55,782 psi | 87% | 3409 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,752 psi | 86% | 3392 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,534 psi | 85% | 3333 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,797 psi | 89% | 3599 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,651 psi | 87% | 3442 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,101 psi | 58% | 2241 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,087 psi | 89% | 3399 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,347 psi | 88% | 3383 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 57,261 psi | 90% | 3406 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,478 psi | 89% | 3396 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 92% | 54,346 psi | 85% | 3458 fps | 98.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,280 psi | 69% | 3261 fps | 96.5% |
| Lovex S065 | <<locked>> | 84% | 57,072 psi | 89% | 3379 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,361 psi | 87% | 3369 fps | 99.9% |
| Lovex S071 | <<locked>> | 98% | 57,609 psi | 90% | 3392 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,491 psi | 85% | 3392 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 44,817 psi | 70% | 3294 fps | 98.7% |
| Norma MRP | <<locked>> | 90% | 56,608 psi | 89% | 3501 fps | 99.9% |
| Norma URP | <<locked>> | 84% | 55,100 psi | 86% | 3392 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 55,274 psi | 87% | 3478 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 84% | 54,230 psi | 85% | 3392 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 53,940 psi | 85% | 3399 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,869 psi | 59% | 2290 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,290 psi | 90% | 3435 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,912 psi | 88% | 3468 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 53,954 psi | 85% | 3517 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 57,653 psi | 90% | 3533 fps | 98.4% |
| Rottweil R 904 | <<locked>> | 88% | 55,317 psi | 87% | 3383 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 90% | 57,174 psi | 90% | 3455 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 82% | 54,824 psi | 86% | 3353 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,072 psi | 89% | 3379 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,361 psi | 87% | 3369 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,420 psi | 88% | 3327 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,753 psi | 89% | 3448 fps | 99.5% |
| Somchem S361 | <<locked>> | 88% | 57,058 psi | 89% | 3366 fps | 98.3% |
| Somchem S365 | <<locked>> | 86% | 56,173 psi | 88% | 3396 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,682 psi | 90% | 3419 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 82% | 57,130 psi | 90% | 3314 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,927 psi | 89% | 3389 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,624 psi | 90% | 3399 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 84% | 56,144 psi | 88% | 3389 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,927 psi | 88% | 3419 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 56,246 psi | 88% | 3497 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 96% | 56,536 psi | 89% | 3468 fps | 98.6% |
| Vihtavuori N568 | <<locked>> | 98% | 53,925 psi | 85% | 3461 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,782 psi | 89% | 3330 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,839 psi | 86% | 3412 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 94% | 57,203 psi | 90% | 3537 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 53,954 psi | 85% | 3350 fps | 99.1% |
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% | 36,709 psi | 58% | 2969 fps | 97.5% |
| Accurate 4350 | <<locked>> | 80% | 49,255 psi | 77% | 3281 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 43,439 psi | 68% | 3238 fps | 95.8% |
| Accurate MAGPRO | 102.3 gr | 86% | 47,747 psi | 75% | 3320 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 41,046 psi | 64% | 3133 fps | 96.2% |
| ADI AR 2213 | <<locked>> | 84% | 42,279 psi | 66% | 3189 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 92% | 41,075 psi | 64% | 3143 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 90% | 34,519 psi | 54% | 3012 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,278 psi | 65% | 3127 fps | 96.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,340 psi | 74% | 3294 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,104 psi | 64% | 3123 fps | 96.3% |
| Alliant Reloder-22 | <<locked>> | 82% | 39,639 psi | 62% | 3117 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,447 psi | 56% | 3002 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,661 psi | 48% | 2887 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,755 psi | 62% | 3169 fps | 99.3% |
| Bofors RP15 | <<locked>> | 84% | 39,378 psi | 62% | 3107 fps | 95.6% |
| Bofors RP30 | <<locked>> | 90% | 40,408 psi | 63% | 3153 fps | 95.3% |
| Bofors RP5 | <<locked>> | 82% | 39,639 psi | 62% | 3117 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 51,343 psi | 80% | 3287 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 88% | 39,117 psi | 61% | 3097 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 51,024 psi | 80% | 3340 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 53,447 psi | 84% | 3363 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 45,165 psi | 71% | 3196 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 84% | 44,338 psi | 69% | 3179 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,454 psi | 70% | 3150 fps | 100% |
| Hodgdon Retumbo | 96.7 gr | 86% | 36,956 psi | 58% | 3133 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 51,503 psi | 81% | 3369 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,775 psi | 44% | 2014 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,847 psi | 73% | 3205 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,852 psi | 83% | 3320 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 46,702 psi | 73% | 3215 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 43,439 psi | 68% | 3127 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 86% | 43,700 psi | 68% | 3232 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 41,162 psi | 65% | 3189 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 50,183 psi | 79% | 3255 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 48,588 psi | 76% | 3241 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 31,314 psi | 49% | 2818 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 47,340 psi | 74% | 3251 fps | 97.8% |
| Norma 217 | <<locked>> | 94% | 35,955 psi | 56% | 3071 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 38,972 psi | 61% | 3127 fps | 97% |
| Norma URP | <<locked>> | 80% | 48,153 psi | 75% | 3268 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 40,509 psi | 63% | 3163 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 47,195 psi | 74% | 3258 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 36,303 psi | 57% | 3015 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,282 psi | 44% | 2057 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,617 psi | 78% | 3304 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,993 psi | 75% | 3323 fps | 100% |
| ReloadSwiss RS 76 | 101.1 gr | 84% | 33,808 psi | 53% | 3018 fps | 95.3% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 45,324 psi | 71% | 3287 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 42,192 psi | 66% | 3107 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 40,379 psi | 63% | 3107 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 80% | 51,343 psi | 80% | 3287 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,183 psi | 79% | 3255 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 48,588 psi | 76% | 3241 fps | 99.3% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,284 psi | 77% | 3196 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,045 psi | 63% | 3097 fps | 96% |
| Somchem S361 | <<locked>> | 80% | 43,163 psi | 68% | 3087 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 45,411 psi | 71% | 3212 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,959 psi | 64% | 3084 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 80% | 53,505 psi | 84% | 3258 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,676 psi | 78% | 3261 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,476 psi | 56% | 2933 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 48,994 psi | 77% | 3261 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,610 psi | 62% | 3094 fps | 99.6% |
| Vihtavuori N560 | <<locked>> | 84% | 45,252 psi | 71% | 3271 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 88% | 42,482 psi | 67% | 3176 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 94% | 46,383 psi | 73% | 3304 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,240 psi | 77% | 3209 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,169 psi | 80% | 3343 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,155 psi | 50% | 3018 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,478 psi | 59% | 2992 fps | 95% |
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 | 139gr | RWS Evolution Green. Hodgdon Retumbo delivers the highest muzzle velocity at 3,599 fps; across all powders the maximum-charge window runs from 2,241 fps to 3,599 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 139.0 gr projectile in 0.308" calls for a 1:10.5 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 MAGPRO rank at the top here: for .30-378 Weath. Mag. with the .308 | 139gr | RWS Evolution Green 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.