Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | Norma ECO Strike bullet and 67 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>> | 90% | 55,825 psi | 87% | 3271 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,159 psi | 88% | 3301 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 53,896 psi | 84% | 3369 fps | 99% |
| Accurate MAGPRO | <<locked>> | 88% | 54,998 psi | 86% | 3376 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 88% | 57,595 psi | 90% | 3373 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 90% | 55,883 psi | 88% | 3383 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 98% | 54,346 psi | 85% | 3343 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,910 psi | 83% | 3366 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,609 psi | 90% | 3369 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,014 psi | 89% | 3360 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,173 psi | 88% | 3373 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 53,998 psi | 85% | 3281 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 54,085 psi | 85% | 3346 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 54,578 psi | 86% | 3369 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,391 psi | 88% | 3428 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,014 psi | 89% | 3333 fps | 97.3% |
| Bofors RP15 | <<locked>> | 92% | 55,317 psi | 87% | 3360 fps | 99.6% |
| Bofors RP30 | <<locked>> | 96% | 53,809 psi | 84% | 3350 fps | 99.3% |
| Bofors RP5 | <<locked>> | 90% | 56,173 psi | 88% | 3373 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 57,624 psi | 90% | 3304 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 55,970 psi | 88% | 3373 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 88% | 55,245 psi | 87% | 3310 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 54,099 psi | 85% | 3287 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,609 psi | 90% | 3278 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 56,927 psi | 89% | 3504 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,333 psi | 59% | 2172 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,231 psi | 88% | 3291 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 56,579 psi | 89% | 3291 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 55,767 psi | 87% | 3291 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 90% | 53,998 psi | 85% | 3356 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,037 psi | 75% | 3251 fps | 98.3% |
| Lovex S065 | <<locked>> | 82% | 56,304 psi | 88% | 3264 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,723 psi | 86% | 3261 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,406 psi | 90% | 3294 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,624 psi | 90% | 3353 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 48,704 psi | 76% | 3281 fps | 99.7% |
| Norma MRP | <<locked>> | 88% | 56,144 psi | 88% | 3392 fps | 100% |
| Norma URP | <<locked>> | 82% | 54,578 psi | 86% | 3281 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 55,085 psi | 86% | 3376 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 84% | 57,421 psi | 90% | 3350 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 53,693 psi | 84% | 3297 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,159 psi | 60% | 2221 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,623 psi | 89% | 3323 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 55,303 psi | 87% | 3356 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 53,867 psi | 84% | 3415 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 57,638 psi | 90% | 3442 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 86% | 54,505 psi | 85% | 3274 fps | 99% |
| Rottweil R 905 | <<locked>> | 88% | 56,710 psi | 89% | 3350 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 57,624 psi | 90% | 3304 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,304 psi | 88% | 3264 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,723 psi | 86% | 3261 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,361 psi | 87% | 3212 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,304 psi | 88% | 3343 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 56,130 psi | 88% | 3261 fps | 98.7% |
| Somchem S365 | <<locked>> | 84% | 55,738 psi | 87% | 3284 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,043 psi | 89% | 3314 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 56,202 psi | 88% | 3274 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,014 psi | 89% | 3294 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 55,434 psi | 87% | 3274 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 55,738 psi | 87% | 3310 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 55,709 psi | 87% | 3389 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 94% | 56,434 psi | 88% | 3376 fps | 99.1% |
| Vihtavuori N568 | <<locked>> | 96% | 53,911 psi | 84% | 3369 fps | 97.9% |
| Vihtavuori N570 | <<locked>> | 98% | 55,100 psi | 86% | 3435 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 55,927 psi | 88% | 3215 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 57,522 psi | 90% | 3432 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,217 psi | 90% | 3310 fps | 99.8% |
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% | 39,334 psi | 62% | 2946 fps | 98.8% |
| Accurate 4350 | <<locked>> | 80% | 52,417 psi | 82% | 3238 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 43,352 psi | 68% | 3146 fps | 96.7% |
| Accurate MAGPRO | 98 gr | 82% | 44,048 psi | 69% | 3146 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 43,700 psi | 68% | 3104 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 80% | 38,972 psi | 61% | 3015 fps | 95% |
| ADI AR 2217 | <<locked>> | 88% | 38,159 psi | 60% | 2989 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 86% | 32,227 psi | 51% | 2864 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,270 psi | 79% | 3245 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,685 psi | 68% | 3097 fps | 97.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,479 psi | 62% | 3025 fps | 96.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,174 psi | 60% | 2976 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,909 psi | 52% | 2881 fps | 97.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,062 psi | 67% | 3150 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 51,982 psi | 81% | 3346 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 49,951 psi | 78% | 3199 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 36,695 psi | 57% | 2949 fps | 95.4% |
| Bofors RP30 | <<locked>> | 86% | 37,724 psi | 59% | 2995 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 39,479 psi | 62% | 3025 fps | 96.7% |
| Bofors RP7 | <<locked>> | 80% | 54,012 psi | 85% | 3241 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 84% | 36,216 psi | 57% | 2936 fps | 95% |
| Hodgdon H4831 | <<locked>> | 80% | 41,597 psi | 65% | 3025 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,828 psi | 64% | 3009 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,152 psi | 74% | 3107 fps | 100% |
| Hodgdon Retumbo | 92.7 gr | 82% | 34,447 psi | 54% | 2976 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,905 psi | 44% | 1949 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,472 psi | 78% | 3166 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 49,588 psi | 78% | 3173 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,975 psi | 67% | 3031 fps | 96% |
| IMR 7828 SSC | <<locked>> | 82% | 40,480 psi | 63% | 3068 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 94% | 38,754 psi | 61% | 3041 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 52,852 psi | 83% | 3209 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,314 psi | 80% | 3202 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 33,634 psi | 53% | 2802 fps | 97.2% |
| Norma 204 | <<locked>> | 80% | 50,140 psi | 79% | 3215 fps | 98.9% |
| Norma 217 | <<locked>> | 90% | 33,794 psi | 53% | 2923 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 41,930 psi | 66% | 3110 fps | 98.6% |
| Norma URP | <<locked>> | 80% | 51,053 psi | 80% | 3222 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 40,393 psi | 63% | 3074 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 50,111 psi | 79% | 3219 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,417 psi | 52% | 2851 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,587 psi | 45% | 1995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,823 psi | 83% | 3261 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,314 psi | 80% | 3284 fps | 100% |
| ReloadSwiss RS 76 | 99.2 gr | 82% | 33,750 psi | 53% | 2943 fps | 96.4% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 41,989 psi | 66% | 3123 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 44,701 psi | 70% | 3077 fps | 97% |
| Rottweil R 905 | <<locked>> | 80% | 43,062 psi | 67% | 3081 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 80% | 54,012 psi | 85% | 3241 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,852 psi | 83% | 3209 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,314 psi | 80% | 3202 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,706 psi | 81% | 3150 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,728 psi | 67% | 3074 fps | 97.7% |
| Somchem S361 | <<locked>> | 80% | 45,643 psi | 72% | 3061 fps | 96.6% |
| Somchem S365 | <<locked>> | 80% | 48,573 psi | 76% | 3166 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,439 psi | 68% | 3054 fps | 98.5% |
| Vihtavuori N160 | <<locked>> | 80% | 52,591 psi | 82% | 3215 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,869 psi | 59% | 2910 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 80% | 51,837 psi | 81% | 3212 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,467 psi | 67% | 3064 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,814 psi | 66% | 3097 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 84% | 39,508 psi | 62% | 3018 fps | 95% |
| Vihtavuori N568 | <<locked>> | 92% | 46,470 psi | 73% | 3219 fps | 96% |
| Vihtavuori N570 | <<locked>> | 96% | 51,024 psi | 80% | 3356 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,127 psi | 82% | 3156 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,534 psi | 56% | 3012 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,972 psi | 63% | 2969 fps | 96.8% |
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 67 powders for .30-378 Weath. Mag. loaded with the .308 | 150gr | Norma ECO Strike. Hodgdon Retumbo delivers the highest muzzle velocity at 3,504 fps; across all powders the maximum-charge window runs from 2,172 fps to 3,504 fps. ADI AR 2225 gives the best case fill at 100 %, and 67 of the 67 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 150.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-33, 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 | 150gr | Norma ECO Strike 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.