Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 175gr | Berger VLD Target bullet and 51 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 ADI AR 2218.
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>> | 86% | 55,695 psi | 87% | 3064 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 57,711 psi | 90% | 3235 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 84% | 54,708 psi | 86% | 3173 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 84% | 56,710 psi | 89% | 3156 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,390 psi | 87% | 3173 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 94% | 54,317 psi | 85% | 3146 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 98% | 54,868 psi | 86% | 3271 fps | 98.4% |
| ADI AR 2225 | <<locked>> | 98% | 57,450 psi | 90% | 3232 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 56,913 psi | 89% | 3153 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,318 psi | 88% | 3143 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 55,927 psi | 88% | 3166 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,070 psi | 85% | 3068 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 54,505 psi | 85% | 3146 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 54,563 psi | 86% | 3156 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 56,811 psi | 89% | 3248 fps | 98.5% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 56,724 psi | 89% | 3238 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,767 psi | 87% | 3127 fps | 98.4% |
| Bofors RP15 | <<locked>> | 88% | 55,303 psi | 87% | 3156 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 54,360 psi | 85% | 3159 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 55,927 psi | 88% | 3166 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 55,709 psi | 87% | 3169 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 54,215 psi | 85% | 3097 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,029 psi | 89% | 3143 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,014 psi | 89% | 3054 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 53,693 psi | 84% | 3238 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,869 psi | 59% | 2031 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,636 psi | 86% | 3077 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 88% | 57,725 psi | 90% | 3215 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,333 psi | 88% | 3212 fps | 100% |
| Lovex S071 | <<locked>> | 92% | 57,522 psi | 90% | 3091 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,041 psi | 85% | 3176 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,028 psi | 88% | 3182 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,114 psi | 86% | 3179 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 53,563 psi | 84% | 3100 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,827 psi | 61% | 2077 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 54,476 psi | 85% | 3222 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 53,795 psi | 84% | 3182 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 84% | 57,130 psi | 90% | 3123 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 84% | 56,159 psi | 88% | 3136 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,796 psi | 87% | 3133 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 54,766 psi | 86% | 3051 fps | 99.5% |
| Somchem S385 | <<locked>> | 84% | 56,420 psi | 88% | 3104 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,565 psi | 89% | 3091 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 55,782 psi | 87% | 3114 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 84% | 55,796 psi | 87% | 3100 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,419 psi | 87% | 3186 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 90% | 56,536 psi | 89% | 3179 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 92% | 54,505 psi | 85% | 3189 fps | 99.1% |
| Vihtavuori N570 | <<locked>> | 94% | 55,695 psi | 87% | 3255 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 86% | 54,491 psi | 85% | 3163 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,260 psi | 88% | 3100 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% | 45,513 psi | 71% | 2890 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 50,096 psi | 79% | 3097 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 80% | 47,384 psi | 74% | 3035 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 80% | 49,516 psi | 78% | 3028 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 44,831 psi | 70% | 2972 fps | 98.4% |
| ADI AR 2217 | <<locked>> | 80% | 33,359 psi | 52% | 2690 fps | 95% |
| ADI AR 2218 | 109.5 gr | 92% | 43,859 psi | 69% | 3031 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 80% | 30,763 psi | 48% | 2657 fps | 97.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 49,835 psi | 78% | 3031 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,400 psi | 77% | 3025 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,629 psi | 72% | 2979 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,367 psi | 70% | 2907 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,508 psi | 60% | 2844 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,633 psi | 79% | 3091 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 45,252 psi | 71% | 3028 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 94% | 45,150 psi | 71% | 3012 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,004 psi | 67% | 2877 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 42,380 psi | 66% | 2907 fps | 98.7% |
| Bofors RP30 | <<locked>> | 80% | 36,013 psi | 56% | 2776 fps | 96.3% |
| Bofors RP5 | <<locked>> | 80% | 45,629 psi | 72% | 2979 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 80% | 36,376 psi | 57% | 2776 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 80% | 47,369 psi | 74% | 2972 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,499 psi | 73% | 2956 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,359 psi | 84% | 3002 fps | 100% |
| Hodgdon Retumbo | 89.9 gr | 80% | 37,652 psi | 59% | 2897 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,369 psi | 44% | 1818 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,037 psi | 75% | 2956 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 80% | 43,613 psi | 68% | 2953 fps | 98.2% |
| IMR 8133 Enduron | <<locked>> | 86% | 34,882 psi | 55% | 2762 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 39,305 psi | 62% | 2762 fps | 99.6% |
| Norma 217 | <<locked>> | 82% | 30,676 psi | 48% | 2664 fps | 96.2% |
| Norma MRP | <<locked>> | 80% | 48,602 psi | 76% | 3051 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 43,918 psi | 69% | 2969 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 80% | 39,653 psi | 62% | 2838 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,153 psi | 46% | 1860 fps | 100% |
| ReloadSwiss RS 76 | 96.2 gr | 80% | 37,072 psi | 58% | 2867 fps | 99.2% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 39,653 psi | 62% | 2890 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 50,082 psi | 78% | 2999 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 80% | 49,066 psi | 77% | 3012 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,718 psi | 76% | 3009 fps | 99.7% |
| Somchem S361 | <<locked>> | 80% | 51,198 psi | 80% | 2989 fps | 99% |
| Somchem S385 | <<locked>> | 80% | 49,516 psi | 78% | 2986 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 43,323 psi | 68% | 2854 fps | 99.3% |
| Vihtavuori N170 | <<locked>> | 88% | 48,646 psi | 76% | 2982 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 80% | 49,110 psi | 77% | 2992 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,138 psi | 75% | 3051 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 80% | 40,103 psi | 63% | 2854 fps | 97% |
| Vihtavuori N568 | <<locked>> | 84% | 40,814 psi | 64% | 2910 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 88% | 44,802 psi | 70% | 3035 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,236 psi | 68% | 2976 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,788 psi | 72% | 2913 fps | 99.3% |
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 51 powders for .30-378 Weath. Mag. loaded with the .308 | 175gr | Berger VLD Target. ADI AR 2218 delivers the highest muzzle velocity at 3,271 fps; across all powders the maximum-charge window runs from 2,031 fps to 3,271 fps. Alliant Reloder-50 gives the best case fill at 100 %, and 51 of the 51 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 175.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-50, 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, ADI AR 2218 rank at the top here: for .30-378 Weath. Mag. with the .308 | 175gr | Berger VLD Target 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.