Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | Norma Kalahari bullet and 61 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 ReloadSwiss RS 80.
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>> | 88% | 54,099 psi | 85% | 3235 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 55,840 psi | 88% | 3399 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 88% | 56,927 psi | 89% | 3406 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 86% | 55,347 psi | 87% | 3333 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 90% | 57,624 psi | 90% | 3409 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 98% | 56,260 psi | 88% | 3373 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,897 psi | 86% | 3396 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,695 psi | 87% | 3330 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,419 psi | 87% | 3330 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,100 psi | 86% | 3320 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 88% | 54,201 psi | 85% | 3333 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,927 psi | 88% | 3307 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 56,159 psi | 88% | 3379 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,724 psi | 89% | 3399 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 54,288 psi | 85% | 3386 fps | 96.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,795 psi | 86% | 3294 fps | 96.9% |
| Bofors RP15 | <<locked>> | 92% | 57,145 psi | 90% | 3386 fps | 99.8% |
| Bofors RP30 | <<locked>> | 96% | 55,927 psi | 88% | 3383 fps | 99.5% |
| Bofors RP5 | <<locked>> | 88% | 54,201 psi | 85% | 3333 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 94% | 53,838 psi | 84% | 3333 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 88% | 56,898 psi | 89% | 3337 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,709 psi | 87% | 3317 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,680 psi | 87% | 3245 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 54,998 psi | 86% | 3465 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,449 psi | 59% | 2175 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 54,186 psi | 85% | 3248 fps | 99.9% |
| IMR 4831 | <<locked>> | 82% | 54,723 psi | 86% | 3255 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,276 psi | 90% | 3314 fps | 99% |
| IMR 7828 SSC | <<locked>> | 90% | 55,956 psi | 88% | 3386 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,212 psi | 79% | 3291 fps | 98.7% |
| Lovex S070 | <<locked>> | 82% | 56,347 psi | 88% | 3284 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 55,927 psi | 88% | 3268 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,434 psi | 87% | 3310 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 51,024 psi | 80% | 3320 fps | 99.9% |
| Norma MRP | <<locked>> | 86% | 54,201 psi | 85% | 3353 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,246 psi | 88% | 3304 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,217 psi | 90% | 3412 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 82% | 55,405 psi | 87% | 3310 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,811 psi | 87% | 3333 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,450 psi | 60% | 2228 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,130 psi | 90% | 3379 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 56,217 psi | 88% | 3451 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,724 psi | 87% | 3402 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 86% | 56,101 psi | 88% | 3301 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 86% | 54,665 psi | 86% | 3310 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 82% | 56,347 psi | 88% | 3284 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,898 psi | 89% | 3235 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 54,273 psi | 85% | 3304 fps | 99.6% |
| Somchem S361 | <<locked>> | 86% | 57,696 psi | 90% | 3287 fps | 99% |
| Somchem S365 | <<locked>> | 84% | 57,711 psi | 90% | 3307 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,143 psi | 86% | 3278 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 90% | 55,056 psi | 86% | 3258 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 82% | 57,232 psi | 90% | 3301 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 54,230 psi | 85% | 3281 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,667 psi | 90% | 3422 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 92% | 54,621 psi | 86% | 3340 fps | 98.9% |
| Vihtavuori N568 | <<locked>> | 96% | 56,057 psi | 88% | 3406 fps | 98.3% |
| Vihtavuori N570 | <<locked>> | 98% | 57,246 psi | 90% | 3471 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,537 psi | 90% | 3235 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,535 psi | 87% | 3396 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,027 psi | 86% | 3271 fps | 99.6% |
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% | 41,220 psi | 65% | 2986 fps | 99.2% |
| Accurate High Country | <<locked>> | 80% | 45,107 psi | 71% | 3182 fps | 97.2% |
| Accurate MAGPRO | <<locked>> | 80% | 42,670 psi | 67% | 3110 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 45,179 psi | 71% | 3133 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 80% | 40,553 psi | 64% | 3054 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 88% | 39,726 psi | 62% | 3025 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 84% | 31,589 psi | 50% | 2838 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,614 psi | 71% | 3133 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,851 psi | 81% | 3271 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,179 psi | 71% | 3123 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,220 psi | 65% | 3064 fps | 97.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,871 psi | 62% | 3009 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,447 psi | 54% | 2920 fps | 98.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,107 psi | 71% | 3189 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 50,328 psi | 79% | 3310 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 48,153 psi | 75% | 3159 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 38,290 psi | 60% | 2989 fps | 96.1% |
| Bofors RP30 | <<locked>> | 86% | 39,595 psi | 62% | 3041 fps | 96% |
| Bofors RP5 | <<locked>> | 80% | 41,220 psi | 65% | 3064 fps | 97.3% |
| Hodgdon H1000 | <<locked>> | 84% | 37,681 psi | 59% | 2976 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 80% | 43,062 psi | 67% | 3058 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,409 psi | 66% | 3045 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,805 psi | 76% | 3130 fps | 100% |
| Hodgdon Retumbo | 93.5 gr | 82% | 35,998 psi | 56% | 3022 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,123 psi | 44% | 1952 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,894 psi | 80% | 3189 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 51,314 psi | 80% | 3199 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,324 psi | 69% | 3058 fps | 96.5% |
| IMR 7828 SSC | <<locked>> | 80% | 39,233 psi | 61% | 3028 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 92% | 37,927 psi | 59% | 3012 fps | 95.1% |
| Lovex S070 | <<locked>> | 80% | 52,939 psi | 83% | 3225 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,360 psi | 55% | 2844 fps | 97.8% |
| Norma 204 | <<locked>> | 80% | 51,634 psi | 81% | 3241 fps | 99.2% |
| Norma 217 | <<locked>> | 88% | 33,199 psi | 52% | 2904 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 43,642 psi | 68% | 3143 fps | 98.9% |
| Norma URP | <<locked>> | 80% | 52,750 psi | 83% | 3248 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,073 psi | 61% | 3038 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 51,692 psi | 81% | 3248 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,172 psi | 55% | 2897 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,834 psi | 45% | 2001 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,156 psi | 83% | 3314 fps | 100% |
| ReloadSwiss RS 76 | 97.7 gr | 80% | 32,967 psi | 52% | 2913 fps | 96.1% |
| ReloadSwiss RS 80 | 110.8 gr | 90% | 44,106 psi | 69% | 3169 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 46,122 psi | 72% | 3107 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 80% | 44,701 psi | 70% | 3114 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 80% | 52,939 psi | 83% | 3225 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,374 psi | 84% | 3176 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,353 psi | 70% | 3107 fps | 98.1% |
| Somchem S361 | <<locked>> | 80% | 47,181 psi | 74% | 3091 fps | 97.1% |
| Somchem S365 | <<locked>> | 80% | 50,401 psi | 79% | 3196 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,237 psi | 71% | 3087 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 80% | 39,392 psi | 62% | 2946 fps | 97.3% |
| Vihtavuori N550 | <<locked>> | 80% | 53,447 psi | 84% | 3238 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,367 psi | 70% | 3100 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,410 psi | 68% | 3133 fps | 96.1% |
| Vihtavuori N565 | <<locked>> | 84% | 41,437 psi | 65% | 3061 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 90% | 45,092 psi | 71% | 3182 fps | 95.6% |
| Vihtavuori N570 | <<locked>> | 96% | 53,330 psi | 84% | 3396 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,708 psi | 84% | 3176 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,536 psi | 59% | 3058 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,524 psi | 65% | 3002 fps | 97.4% |
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 61 powders for .30-378 Weath. Mag. loaded with the .308 | 150gr | Norma Kalahari. Vihtavuori N570 delivers the highest muzzle velocity at 3,471 fps; across all powders the maximum-charge window runs from 2,175 fps to 3,471 fps. ADI AR 2225 gives the best case fill at 100 %, and 61 of the 61 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 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Hodgdon TrailBoss, IMR 8133 Enduron 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, ReloadSwiss RS 80 rank at the top here: for .30-378 Weath. Mag. with the .308 | 150gr | Norma Kalahari 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.