Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 181gr | Brenneke TUG bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Vihtavuori N570 and Hodgdon Retumbo.
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>> | 84% | 54,665 psi | 86% | 3005 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 50,111 psi | 79% | 3031 fps | 97.1% |
| Accurate High Country | <<locked>> | 82% | 56,608 psi | 89% | 3173 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 57,711 psi | 90% | 3186 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 82% | 55,463 psi | 87% | 3094 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 54,201 psi | 85% | 3114 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 94% | 57,595 psi | 90% | 3156 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 54,114 psi | 85% | 3222 fps | 98.7% |
| ADI AR 2225 | <<locked>> | 96% | 57,072 psi | 89% | 3179 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 55,666 psi | 87% | 3091 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,114 psi | 86% | 3084 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 54,824 psi | 86% | 3107 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 56,985 psi | 89% | 3068 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 57,667 psi | 90% | 3146 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 57,725 psi | 90% | 3156 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 56,086 psi | 88% | 3196 fps | 98.7% |
| Alliant Reloder-50 | <<locked>> | 98% | 56,217 psi | 88% | 3189 fps | 98.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 54,578 psi | 86% | 3071 fps | 98.6% |
| Bofors RP15 | <<locked>> | 86% | 54,375 psi | 85% | 3100 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 57,464 psi | 90% | 3169 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 54,824 psi | 86% | 3107 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 55,042 psi | 86% | 3117 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 56,840 psi | 89% | 3104 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 55,666 psi | 87% | 3084 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 90% | 57,261 psi | 90% | 3245 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,942 psi | 59% | 2011 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,898 psi | 89% | 3077 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 86% | 56,695 psi | 89% | 3159 fps | 100% |
| IMR 8133 Enduron | <<locked>> | 98% | 56,057 psi | 88% | 3163 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 56,768 psi | 89% | 3038 fps | 100% |
| Norma 217 | <<locked>> | 98% | 57,522 psi | 90% | 3182 fps | 100% |
| Norma MRP | <<locked>> | 82% | 54,998 psi | 86% | 3120 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,070 psi | 85% | 3120 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 56,811 psi | 89% | 3107 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,044 psi | 61% | 2057 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 53,896 psi | 84% | 3163 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 57,450 psi | 90% | 3202 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 82% | 55,811 psi | 87% | 3064 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 54,998 psi | 86% | 3074 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 52,054 psi | 82% | 3045 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 54,621 psi | 86% | 3074 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 57,101 psi | 89% | 3051 fps | 99.8% |
| Somchem S385 | <<locked>> | 82% | 55,216 psi | 87% | 3041 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 55,419 psi | 87% | 3031 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 54,694 psi | 86% | 3058 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 54,984 psi | 86% | 3041 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 54,346 psi | 85% | 3127 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 88% | 55,738 psi | 87% | 3123 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 92% | 57,711 psi | 90% | 3202 fps | 99.7% |
| Vihtavuori N570 | <<locked>> | 92% | 55,143 psi | 86% | 3202 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 84% | 53,795 psi | 84% | 3100 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,042 psi | 86% | 3041 fps | 100% |
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% | 47,747 psi | 75% | 2890 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 43,149 psi | 68% | 2890 fps | 95% |
| Accurate High Country | <<locked>> | 80% | 52,779 psi | 83% | 3107 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 80% | 50,053 psi | 78% | 3048 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 80% | 51,837 psi | 81% | 3035 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 47,137 psi | 74% | 2982 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 80% | 35,186 psi | 55% | 2707 fps | 96.5% |
| ADI AR 2218 | 109.6 gr | 90% | 43,323 psi | 68% | 2986 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 32,561 psi | 51% | 2680 fps | 98.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 52,112 psi | 82% | 3031 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 51,619 psi | 81% | 3022 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 47,921 psi | 75% | 2982 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 46,615 psi | 73% | 2904 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 40,828 psi | 64% | 2854 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 53,708 psi | 84% | 3094 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 41,553 psi | 65% | 2904 fps | 95% |
| Alliant Reloder-50 | <<locked>> | 92% | 44,962 psi | 70% | 2969 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,846 psi | 70% | 2884 fps | 96.5% |
| Bofors RP15 | <<locked>> | 80% | 44,599 psi | 70% | 2917 fps | 99.4% |
| Bofors RP30 | <<locked>> | 80% | 38,145 psi | 60% | 2792 fps | 97.6% |
| Bofors RP5 | <<locked>> | 80% | 47,921 psi | 75% | 2982 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 80% | 38,348 psi | 60% | 2789 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 80% | 49,530 psi | 78% | 2976 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 48,660 psi | 76% | 2959 fps | 99% |
| Hodgdon Retumbo | 91.9 gr | 80% | 39,914 psi | 63% | 2913 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,514 psi | 45% | 1801 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,024 psi | 78% | 2956 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 80% | 45,948 psi | 72% | 2963 fps | 99% |
| IMR 8133 Enduron | <<locked>> | 82% | 32,387 psi | 51% | 2654 fps | 95% |
| Lovex S071 | <<locked>> | 80% | 41,278 psi | 65% | 2769 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 30,472 psi | 48% | 2618 fps | 96.6% |
| Norma MRP | <<locked>> | 80% | 51,227 psi | 80% | 3058 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 46,630 psi | 73% | 2982 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 80% | 42,076 psi | 66% | 2848 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,312 psi | 46% | 1844 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 39,552 psi | 62% | 2887 fps | 99.8% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 36,405 psi | 57% | 2769 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 52,243 psi | 82% | 3002 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 80% | 51,416 psi | 81% | 3015 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 45,266 psi | 71% | 2913 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,068 psi | 80% | 3012 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 53,461 psi | 84% | 2992 fps | 99.6% |
| Somchem S385 | <<locked>> | 80% | 51,750 psi | 81% | 2986 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,382 psi | 71% | 2858 fps | 99.8% |
| Vihtavuori N170 | <<locked>> | 86% | 47,892 psi | 75% | 2930 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 80% | 51,445 psi | 81% | 2986 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 50,662 psi | 79% | 3061 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 80% | 42,409 psi | 66% | 2867 fps | 98.1% |
| Vihtavuori N568 | <<locked>> | 80% | 37,492 psi | 59% | 2789 fps | 95.1% |
| Vihtavuori N570 | 102.6 gr | 86% | 44,469 psi | 70% | 2989 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 46,325 psi | 73% | 2982 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 47,906 psi | 75% | 2917 fps | 99.8% |
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 52 powders for .30-378 Weath. Mag. loaded with the .308 | 181gr | Brenneke TUG. Hodgdon Retumbo delivers the highest muzzle velocity at 3,245 fps; across all powders the maximum-charge window runs from 2,011 fps to 3,245 fps. Accurate 8700 gives the best case fill at 100 %, and 52 of the 52 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 181.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, ReloadSwiss RS 14 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. ADI AR 2218, Vihtavuori N570, Hodgdon Retumbo rank at the top here: for .30-378 Weath. Mag. with the .308 | 181gr | Brenneke TUG 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.