Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 154gr | Hammer HHT bullet and 65 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 80 and Vihtavuori N568.
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% | 56,724 psi | 89% | 3248 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,217 psi | 90% | 3284 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 55,985 psi | 88% | 3363 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 86% | 54,665 psi | 86% | 3294 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 90% | 56,869 psi | 89% | 3366 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 98% | 55,390 psi | 87% | 3330 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,983 psi | 85% | 3353 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 54,853 psi | 86% | 3284 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 82% | 54,824 psi | 86% | 3291 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 54,259 psi | 85% | 3278 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,101 psi | 89% | 3360 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 90% | 54,955 psi | 86% | 3261 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,303 psi | 87% | 3333 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 55,651 psi | 87% | 3350 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 57,653 psi | 90% | 3422 fps | 97.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,099 psi | 85% | 3251 fps | 97% |
| Bofors RP15 | <<locked>> | 92% | 56,434 psi | 88% | 3346 fps | 99.8% |
| Bofors RP30 | <<locked>> | 96% | 54,998 psi | 86% | 3340 fps | 99.5% |
| Bofors RP5 | <<locked>> | 90% | 57,101 psi | 89% | 3360 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 96% | 57,014 psi | 89% | 3356 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 88% | 56,101 psi | 88% | 3291 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,085 psi | 86% | 3278 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 54,839 psi | 86% | 3202 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 54,157 psi | 85% | 3419 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,347 psi | 59% | 2146 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,145 psi | 90% | 3271 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,580 psi | 90% | 3274 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,681 psi | 89% | 3274 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 90% | 55,158 psi | 86% | 3343 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,081 psi | 77% | 3245 fps | 98.7% |
| Lovex S065 | <<locked>> | 82% | 57,188 psi | 90% | 3248 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,622 psi | 87% | 3245 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 54,665 psi | 86% | 3215 fps | 100% |
| Norma 204 | <<locked>> | 82% | 54,708 psi | 86% | 3271 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 49,980 psi | 78% | 3274 fps | 99.9% |
| Norma MRP | <<locked>> | 88% | 57,334 psi | 90% | 3379 fps | 100% |
| Norma URP | <<locked>> | 82% | 55,535 psi | 87% | 3264 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,173 psi | 88% | 3366 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 82% | 54,636 psi | 86% | 3268 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 54,752 psi | 86% | 3284 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,319 psi | 60% | 2198 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,682 psi | 90% | 3307 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,434 psi | 88% | 3340 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,259 psi | 87% | 3409 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 54,505 psi | 85% | 3356 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 86% | 55,405 psi | 87% | 3261 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 88% | 57,624 psi | 90% | 3330 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,188 psi | 90% | 3248 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,622 psi | 87% | 3245 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,202 psi | 88% | 3196 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,203 psi | 90% | 3327 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 56,898 psi | 89% | 3245 fps | 99% |
| Somchem S365 | <<locked>> | 84% | 56,826 psi | 89% | 3264 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 54,259 psi | 85% | 3235 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 82% | 57,145 psi | 90% | 3255 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 54,201 psi | 85% | 3215 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 56,362 psi | 88% | 3258 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,840 psi | 89% | 3294 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,840 psi | 89% | 3379 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 94% | 57,508 psi | 90% | 3360 fps | 99.4% |
| Vihtavuori N568 | <<locked>> | 96% | 55,056 psi | 86% | 3360 fps | 98.3% |
| Vihtavuori N570 | <<locked>> | 98% | 56,333 psi | 88% | 3428 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,884 psi | 89% | 3196 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 54,505 psi | 85% | 3350 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 54,143 psi | 85% | 3228 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% | 40,001 psi | 63% | 2936 fps | 99.1% |
| Accurate 4350 | <<locked>> | 80% | 53,258 psi | 83% | 3219 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 41,756 psi | 65% | 3064 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 44,411 psi | 70% | 3091 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 80% | 39,740 psi | 62% | 3009 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 88% | 38,827 psi | 61% | 2979 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 84% | 30,661 psi | 48% | 2789 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 44,788 psi | 70% | 3087 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,213 psi | 80% | 3228 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,353 psi | 70% | 3081 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,321 psi | 63% | 3018 fps | 97.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,001 psi | 61% | 2966 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,518 psi | 53% | 2867 fps | 98.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,976 psi | 69% | 3136 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 49,197 psi | 77% | 3261 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 47,529 psi | 74% | 3120 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 37,347 psi | 59% | 2940 fps | 96% |
| Bofors RP30 | <<locked>> | 86% | 38,479 psi | 60% | 2989 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 40,321 psi | 63% | 3018 fps | 97.2% |
| Hodgdon H1000 | <<locked>> | 84% | 36,840 psi | 58% | 2930 fps | 95.6% |
| Hodgdon H4831 | <<locked>> | 80% | 42,395 psi | 66% | 3018 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,611 psi | 65% | 2999 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,022 psi | 75% | 3091 fps | 100% |
| Hodgdon Retumbo | 92.6 gr | 82% | 35,215 psi | 55% | 2972 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,021 psi | 44% | 1926 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,140 psi | 79% | 3146 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 50,314 psi | 79% | 3153 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,569 psi | 68% | 3015 fps | 96.5% |
| IMR 7828 SSC | <<locked>> | 80% | 38,363 psi | 60% | 2986 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 92% | 36,869 psi | 58% | 2963 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 53,650 psi | 84% | 3189 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,996 psi | 81% | 3182 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,229 psi | 54% | 2789 fps | 97.6% |
| Norma 204 | <<locked>> | 80% | 50,894 psi | 80% | 3199 fps | 99.2% |
| Norma 217 | <<locked>> | 88% | 32,155 psi | 50% | 2848 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 42,728 psi | 67% | 3097 fps | 98.9% |
| Norma URP | <<locked>> | 80% | 51,808 psi | 81% | 3202 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,159 psi | 60% | 2989 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 50,879 psi | 80% | 3202 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,214 psi | 54% | 2848 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,587 psi | 45% | 1969 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,679 psi | 84% | 3241 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,359 psi | 82% | 3271 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 31,894 psi | 50% | 2858 fps | 95.8% |
| ReloadSwiss RS 80 | 109.6 gr | 90% | 42,975 psi | 67% | 3120 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 45,339 psi | 71% | 3064 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 80% | 43,772 psi | 69% | 3068 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,650 psi | 84% | 3189 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,996 psi | 81% | 3182 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,518 psi | 82% | 3133 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,424 psi | 68% | 3058 fps | 98.1% |
| Somchem S361 | <<locked>> | 80% | 46,427 psi | 73% | 3051 fps | 97.1% |
| Somchem S365 | <<locked>> | 80% | 49,371 psi | 77% | 3146 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,251 psi | 69% | 3041 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 80% | 53,330 psi | 84% | 3192 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,493 psi | 60% | 2897 fps | 97.3% |
| Vihtavuori N550 | <<locked>> | 80% | 52,707 psi | 83% | 3196 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,337 psi | 68% | 3051 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,569 psi | 67% | 3087 fps | 96.1% |
| Vihtavuori N565 | <<locked>> | 84% | 40,408 psi | 63% | 3012 fps | 95.7% |
| Vihtavuori N568 | 106 gr | 90% | 44,092 psi | 69% | 3136 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 96% | 52,315 psi | 82% | 3350 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,866 psi | 83% | 3136 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,477 psi | 57% | 3002 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,756 psi | 64% | 2963 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 65 powders for .30-378 Weath. Mag. loaded with the .308 | 154gr | Hammer HHT. Vihtavuori N570 delivers the highest muzzle velocity at 3,428 fps; across all powders the maximum-charge window runs from 2,146 fps to 3,428 fps. ADI AR 2225 gives the best case fill at 100 %, and 65 of the 65 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 1:11.5 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 80, Vihtavuori N568 rank at the top here: for .30-378 Weath. Mag. with the .308 | 154gr | Hammer HHT 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.