Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 168gr | Hasler Hunting bullet and 56 powders. The key underlying parameters are shown in the table above.
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% | 55,593 psi | 87% | 3120 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 57,725 psi | 90% | 3291 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 86% | 54,795 psi | 86% | 3232 fps | 99% |
| ADI AR 2209 | <<locked>> | 86% | 57,217 psi | 90% | 3222 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 55,738 psi | 87% | 3235 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 96% | 54,346 psi | 85% | 3205 fps | 99.8% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 54,897 psi | 86% | 3320 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,159 psi | 90% | 3287 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,290 psi | 90% | 3205 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,739 psi | 89% | 3205 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,057 psi | 88% | 3228 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 54,041 psi | 85% | 3130 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 54,404 psi | 85% | 3205 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 54,418 psi | 85% | 3215 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,391 psi | 88% | 3294 fps | 98% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 51,692 psi | 81% | 3196 fps | 96.5% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,362 psi | 88% | 3189 fps | 98.1% |
| Bofors RP15 | <<locked>> | 90% | 55,259 psi | 87% | 3212 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 54,027 psi | 85% | 3212 fps | 99.7% |
| Bofors RP5 | <<locked>> | 88% | 56,057 psi | 88% | 3228 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 55,956 psi | 88% | 3228 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 54,665 psi | 86% | 3159 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,580 psi | 90% | 3205 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,406 psi | 90% | 3120 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,421 psi | 90% | 3356 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,608 psi | 59% | 2064 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,724 psi | 87% | 3133 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,275 psi | 88% | 3133 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,245 psi | 87% | 3140 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 88% | 53,925 psi | 85% | 3212 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,141 psi | 82% | 3196 fps | 99.6% |
| Lovex S071 | <<locked>> | 94% | 57,319 psi | 90% | 3146 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,985 psi | 89% | 3196 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 53,127 psi | 83% | 3219 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,043 psi | 88% | 3241 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,143 psi | 86% | 3235 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 56,927 psi | 89% | 3189 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 53,519 psi | 84% | 3156 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,508 psi | 60% | 2110 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 54,259 psi | 85% | 3278 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 57,740 psi | 90% | 3304 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 86% | 57,609 psi | 90% | 3186 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 86% | 56,478 psi | 89% | 3199 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,086 psi | 88% | 3196 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 55,361 psi | 87% | 3114 fps | 99.3% |
| Somchem S365 | <<locked>> | 82% | 55,651 psi | 87% | 3127 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,666 psi | 89% | 3159 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 56,724 psi | 89% | 3146 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 55,985 psi | 88% | 3166 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 86% | 55,680 psi | 87% | 3156 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,550 psi | 87% | 3245 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 92% | 56,376 psi | 88% | 3232 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 94% | 54,085 psi | 85% | 3238 fps | 98.7% |
| Vihtavuori N570 | <<locked>> | 96% | 55,448 psi | 87% | 3304 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 53,867 psi | 84% | 3219 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,666 psi | 89% | 3159 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 42,177 psi | 66% | 2877 fps | 99.8% |
| Accurate High Country | <<locked>> | 80% | 46,557 psi | 73% | 3081 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 80% | 43,976 psi | 69% | 3015 fps | 96.7% |
| ADI AR 2209 | <<locked>> | 80% | 46,615 psi | 73% | 3028 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 80% | 41,756 psi | 65% | 2956 fps | 97.2% |
| ADI AR 2217 | <<locked>> | 84% | 35,563 psi | 56% | 2799 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 96% | 47,181 psi | 74% | 3156 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 82% | 30,255 psi | 47% | 2687 fps | 96.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,490 psi | 84% | 3146 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,485 psi | 73% | 3018 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,380 psi | 66% | 2963 fps | 98.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,075 psi | 64% | 2900 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,491 psi | 56% | 2825 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,717 psi | 73% | 3081 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 48,283 psi | 76% | 3143 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 98% | 47,790 psi | 75% | 3120 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 46,267 psi | 73% | 2995 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 39,392 psi | 62% | 2890 fps | 97.6% |
| Bofors RP30 | <<locked>> | 82% | 35,404 psi | 55% | 2808 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 42,380 psi | 66% | 2963 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 80% | 33,605 psi | 53% | 2746 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 80% | 44,382 psi | 70% | 2959 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,555 psi | 68% | 2943 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,270 psi | 79% | 3012 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 34,577 psi | 54% | 2858 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,137 psi | 44% | 1847 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,257 psi | 82% | 3074 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 52,663 psi | 83% | 3077 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,440 psi | 71% | 2956 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 80% | 40,408 psi | 63% | 2936 fps | 96.9% |
| IMR 8133 Enduron | <<locked>> | 90% | 36,637 psi | 57% | 2861 fps | 95.9% |
| Lovex S071 | <<locked>> | 80% | 36,042 psi | 56% | 2740 fps | 98.8% |
| Norma 204 | <<locked>> | 80% | 53,142 psi | 83% | 3130 fps | 99.8% |
| Norma 217 | <<locked>> | 84% | 29,689 psi | 47% | 2680 fps | 95% |
| Norma MRP | <<locked>> | 80% | 45,121 psi | 71% | 3041 fps | 99.7% |
| Ramshot Grand | <<locked>> | 80% | 40,437 psi | 63% | 2943 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 80% | 53,185 psi | 83% | 3130 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,376 psi | 57% | 2808 fps | 97.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,863 psi | 45% | 1890 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 33,895 psi | 53% | 2831 fps | 97.9% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 39,117 psi | 61% | 2927 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 47,340 psi | 74% | 2999 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 80% | 45,963 psi | 72% | 3005 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,629 psi | 72% | 2999 fps | 99.1% |
| Somchem S361 | <<locked>> | 80% | 48,327 psi | 76% | 2986 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 51,953 psi | 81% | 3071 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,311 psi | 73% | 2979 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 80% | 40,480 psi | 63% | 2844 fps | 98.5% |
| Vihtavuori N170 | <<locked>> | 92% | 52,083 psi | 82% | 3094 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 45,513 psi | 71% | 2986 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,831 psi | 70% | 3035 fps | 97.6% |
| Vihtavuori N565 | <<locked>> | 80% | 36,985 psi | 58% | 2828 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 86% | 40,190 psi | 63% | 2946 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 92% | 47,659 psi | 75% | 3150 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,175 psi | 61% | 2953 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,757 psi | 67% | 2904 fps | 98.5% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 63 powders for .30-378 Weath. Mag. loaded with the .308 | 168gr | Hasler Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 3,356 fps; across all powders the maximum-charge window runs from 2,064 fps to 3,356 fps. Accurate 8700 gives the best case fill at 100 %, and 63 of the 63 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 168.0 gr projectile in 0.308" calls for a 1:11.0 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. As outliers, Accurate 8700, Lovex D100, Ramshot LRT 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.