Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 154gr | Hasler Hunting bullet and 63 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Vihtavuori N570 and ReloadSwiss RS 76.
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% | 57,580 psi | 90% | 3261 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 56,782 psi | 89% | 3376 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 86% | 55,347 psi | 87% | 3304 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 90% | 57,696 psi | 90% | 3383 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 98% | 56,144 psi | 88% | 3343 fps | 99.7% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,779 psi | 83% | 3373 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,737 psi | 86% | 3360 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,419 psi | 87% | 3301 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 54,853 psi | 86% | 3287 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 54,056 psi | 85% | 3304 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,637 psi | 87% | 3271 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,985 psi | 88% | 3346 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,376 psi | 88% | 3363 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 54,027 psi | 85% | 3353 fps | 96.8% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,708 psi | 86% | 3264 fps | 97.2% |
| Bofors RP15 | <<locked>> | 92% | 57,072 psi | 89% | 3356 fps | 99.9% |
| Bofors RP30 | <<locked>> | 96% | 55,796 psi | 87% | 3350 fps | 99.6% |
| Bofors RP5 | <<locked>> | 88% | 54,056 psi | 85% | 3304 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 94% | 53,679 psi | 84% | 3301 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 88% | 56,695 psi | 89% | 3304 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,680 psi | 87% | 3284 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,376 psi | 87% | 3209 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 55,013 psi | 86% | 3432 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,405 psi | 59% | 2152 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,609 psi | 90% | 3281 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 54,462 psi | 85% | 3222 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,072 psi | 89% | 3284 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 90% | 55,811 psi | 87% | 3356 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,821 psi | 78% | 3255 fps | 98.8% |
| Lovex S065 | <<locked>> | 82% | 57,682 psi | 90% | 3255 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 56,101 psi | 88% | 3255 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 55,303 psi | 87% | 3228 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,201 psi | 87% | 3281 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 50,807 psi | 80% | 3287 fps | 99.9% |
| Norma MRP | <<locked>> | 86% | 54,085 psi | 85% | 3320 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,072 psi | 88% | 3274 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,029 psi | 89% | 3379 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 82% | 55,114 psi | 86% | 3278 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,535 psi | 87% | 3297 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,247 psi | 60% | 2198 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,985 psi | 89% | 3346 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 56,057 psi | 88% | 3419 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,434 psi | 87% | 3373 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 86% | 55,869 psi | 88% | 3268 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 86% | 54,534 psi | 85% | 3281 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,682 psi | 90% | 3255 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 56,101 psi | 88% | 3255 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,666 psi | 89% | 3205 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 54,143 psi | 85% | 3274 fps | 99.7% |
| Somchem S361 | <<locked>> | 86% | 57,595 psi | 90% | 3258 fps | 99.1% |
| Somchem S365 | <<locked>> | 84% | 57,377 psi | 90% | 3271 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 54,882 psi | 86% | 3245 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 57,653 psi | 90% | 3264 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 54,926 psi | 86% | 3228 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 56,869 psi | 89% | 3264 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,348 psi | 90% | 3301 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,479 psi | 90% | 3389 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 92% | 54,346 psi | 85% | 3304 fps | 99% |
| Vihtavuori N568 | <<locked>> | 96% | 55,941 psi | 88% | 3376 fps | 98.5% |
| Vihtavuori N570 | <<locked>> | 98% | 57,261 psi | 90% | 3442 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,479 psi | 90% | 3205 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,463 psi | 87% | 3360 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 54,882 psi | 86% | 3241 fps | 99.7% |
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% | 40,509 psi | 63% | 2946 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 80% | 42,221 psi | 66% | 3074 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 44,904 psi | 70% | 3097 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 80% | 40,190 psi | 63% | 3018 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 88% | 39,349 psi | 62% | 2992 fps | 96.1% |
| ADI AR 2218 | <<locked>> | 98% | 48,936 psi | 77% | 3291 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 84% | 31,125 psi | 49% | 2802 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,619 psi | 81% | 3235 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,831 psi | 70% | 3091 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,785 psi | 64% | 3028 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,392 psi | 62% | 2972 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,968 psi | 53% | 2881 fps | 98.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,643 psi | 70% | 3150 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 50,053 psi | 78% | 3278 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 47,950 psi | 75% | 3130 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 37,826 psi | 59% | 2949 fps | 96.2% |
| Bofors RP30 | <<locked>> | 86% | 39,088 psi | 61% | 3002 fps | 96.1% |
| Bofors RP5 | <<locked>> | 80% | 40,785 psi | 64% | 3028 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 84% | 37,376 psi | 59% | 2943 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 80% | 42,830 psi | 67% | 3028 fps | 96.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,061 psi | 66% | 3009 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,544 psi | 76% | 3097 fps | 100% |
| Hodgdon Retumbo | 91.2 gr | 80% | 33,156 psi | 52% | 2907 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,050 psi | 44% | 1932 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,618 psi | 79% | 3159 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 50,850 psi | 80% | 3159 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,990 psi | 69% | 3025 fps | 96.7% |
| IMR 7828 SSC | <<locked>> | 80% | 38,827 psi | 61% | 2995 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 92% | 37,550 psi | 59% | 2976 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 54,012 psi | 85% | 3196 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,504 psi | 82% | 3192 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,679 psi | 54% | 2802 fps | 97.8% |
| Norma 204 | <<locked>> | 80% | 51,517 psi | 81% | 3212 fps | 99.3% |
| Norma 217 | <<locked>> | 88% | 32,706 psi | 51% | 2861 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 43,366 psi | 68% | 3110 fps | 99.1% |
| Norma URP | <<locked>> | 80% | 52,359 psi | 82% | 3209 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,783 psi | 61% | 3005 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 51,532 psi | 81% | 3212 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,664 psi | 54% | 2861 fps | 96.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,732 psi | 45% | 1975 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,895 psi | 83% | 3278 fps | 100% |
| ReloadSwiss RS 76 | 97.6 gr | 80% | 32,387 psi | 51% | 2871 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 43,671 psi | 68% | 3133 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 45,774 psi | 72% | 3071 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 80% | 44,266 psi | 69% | 3077 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 54,012 psi | 85% | 3196 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,504 psi | 82% | 3192 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,982 psi | 83% | 3140 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,932 psi | 69% | 3071 fps | 98.2% |
| Somchem S361 | <<locked>> | 80% | 46,818 psi | 73% | 3058 fps | 97.3% |
| Somchem S365 | <<locked>> | 80% | 49,951 psi | 78% | 3156 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,744 psi | 70% | 3051 fps | 99% |
| Vihtavuori N160 | <<locked>> | 80% | 53,853 psi | 84% | 3202 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,943 psi | 61% | 2907 fps | 97.4% |
| Vihtavuori N550 | <<locked>> | 80% | 53,229 psi | 83% | 3205 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,743 psi | 69% | 3058 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,163 psi | 68% | 3100 fps | 96.3% |
| Vihtavuori N565 | <<locked>> | 84% | 40,828 psi | 64% | 3018 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 90% | 44,672 psi | 70% | 3150 fps | 95.8% |
| Vihtavuori N570 | 111.2 gr | 94% | 49,182 psi | 77% | 3284 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,476 psi | 84% | 3143 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,188 psi | 58% | 3015 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,220 psi | 65% | 2969 fps | 97.5% |
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 | 154gr | Hasler Hunting. Vihtavuori N570 delivers the highest muzzle velocity at 3,442 fps; across all powders the maximum-charge window runs from 2,152 fps to 3,442 fps. Accurate 8700 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 59–90 %, leaving at least 10 % headroom. The 154.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2218, ADI AR 2225 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, Vihtavuori N570, ReloadSwiss RS 76 rank at the top here: for .30-378 Weath. Mag. with the .308 | 154gr | Hasler Hunting they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 8700, IMR 7977 Enduron, Lovex D100 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.