Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 165gr | Barnes BND SPIT-FIRE bullet and 54 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 N570.
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% | 56,565 psi | 89% | 3153 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 55,550 psi | 87% | 3264 fps | 99% |
| ADI AR 2209 | <<locked>> | 84% | 54,041 psi | 85% | 3186 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 88% | 56,304 psi | 88% | 3264 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 96% | 54,926 psi | 86% | 3235 fps | 99.8% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,637 psi | 87% | 3353 fps | 97.9% |
| ADI AR 2225 | <<locked>> | 98% | 53,882 psi | 84% | 3258 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 57,319 psi | 90% | 3238 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,753 psi | 89% | 3258 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 54,795 psi | 86% | 3163 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 55,056 psi | 86% | 3235 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 55,405 psi | 87% | 3248 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 57,261 psi | 90% | 3330 fps | 98% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 52,866 psi | 83% | 3238 fps | 96.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,913 psi | 89% | 3219 fps | 98.1% |
| Bofors RP15 | <<locked>> | 90% | 56,115 psi | 88% | 3248 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 54,955 psi | 86% | 3248 fps | 99.8% |
| Bofors RP5 | <<locked>> | 88% | 56,753 psi | 89% | 3258 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 56,507 psi | 89% | 3258 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 55,405 psi | 87% | 3192 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 54,244 psi | 85% | 3169 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 54,375 psi | 85% | 3097 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 54,099 psi | 85% | 3323 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,681 psi | 59% | 2080 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 56,304 psi | 88% | 3163 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,058 psi | 89% | 3166 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,782 psi | 87% | 3169 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 88% | 54,549 psi | 85% | 3241 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,895 psi | 83% | 3228 fps | 99.6% |
| Lovex S071 | <<locked>> | 92% | 54,737 psi | 86% | 3123 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,580 psi | 90% | 3225 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 53,983 psi | 85% | 3255 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,753 psi | 89% | 3274 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,796 psi | 87% | 3264 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 57,580 psi | 90% | 3222 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 54,389 psi | 85% | 3189 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,609 psi | 61% | 2126 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 54,911 psi | 86% | 3307 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 54,375 psi | 85% | 3264 fps | 99% |
| Rottweil R 904 | <<locked>> | 84% | 54,694 psi | 86% | 3156 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 86% | 57,145 psi | 90% | 3228 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,753 psi | 89% | 3225 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 56,115 psi | 88% | 3143 fps | 99.3% |
| Somchem S365 | <<locked>> | 82% | 56,420 psi | 88% | 3159 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 57,421 psi | 90% | 3192 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,392 psi | 90% | 3176 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 56,681 psi | 89% | 3192 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 86% | 56,579 psi | 89% | 3189 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 56,173 psi | 88% | 3274 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 92% | 57,203 psi | 90% | 3264 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 94% | 54,969 psi | 86% | 3271 fps | 98.7% |
| Vihtavuori N570 | <<locked>> | 96% | 56,130 psi | 88% | 3333 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 54,694 psi | 86% | 3251 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,305 psi | 90% | 3189 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% | 43,120 psi | 68% | 2913 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 80% | 44,773 psi | 70% | 3048 fps | 96.8% |
| ADI AR 2209 | <<locked>> | 80% | 47,224 psi | 74% | 3061 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 80% | 42,424 psi | 66% | 2992 fps | 97.3% |
| ADI AR 2217 | <<locked>> | 84% | 36,303 psi | 57% | 2835 fps | 95.6% |
| ADI AR 2218 | <<locked>> | 96% | 47,805 psi | 75% | 3186 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 80% | 28,993 psi | 45% | 2657 fps | 95.2% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,021 psi | 74% | 3048 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,178 psi | 68% | 2995 fps | 98.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,916 psi | 66% | 2936 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,303 psi | 57% | 2864 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,630 psi | 75% | 3117 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 45,571 psi | 71% | 3100 fps | 95.1% |
| Alliant Reloder-50 | <<locked>> | 98% | 48,950 psi | 77% | 3159 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 46,746 psi | 73% | 3022 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 40,190 psi | 63% | 2927 fps | 97.7% |
| Bofors RP30 | <<locked>> | 82% | 36,332 psi | 57% | 2851 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 43,178 psi | 68% | 2995 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 80% | 34,374 psi | 54% | 2782 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 80% | 45,034 psi | 71% | 2992 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,251 psi | 69% | 2972 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,821 psi | 80% | 3038 fps | 100% |
| Hodgdon Retumbo | 89.2 gr | 80% | 35,375 psi | 55% | 2900 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,253 psi | 44% | 1864 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,852 psi | 83% | 3104 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,461 psi | 84% | 3107 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,079 psi | 72% | 2986 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 80% | 41,118 psi | 64% | 2969 fps | 96.9% |
| IMR 8133 Enduron | <<locked>> | 90% | 37,536 psi | 59% | 2900 fps | 96.1% |
| Lovex S071 | <<locked>> | 80% | 37,144 psi | 58% | 2782 fps | 99% |
| Norma 204 | <<locked>> | 80% | 53,737 psi | 84% | 3159 fps | 99.7% |
| Norma 217 | <<locked>> | 84% | 30,690 psi | 48% | 2730 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 45,905 psi | 72% | 3077 fps | 99.7% |
| Ramshot Grand | <<locked>> | 80% | 41,205 psi | 65% | 2979 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 80% | 53,824 psi | 84% | 3159 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 37,202 psi | 58% | 2844 fps | 97.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,022 psi | 45% | 1909 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 34,751 psi | 54% | 2871 fps | 98% |
| ReloadSwiss RS 80 | 103.5 gr | 86% | 40,016 psi | 63% | 2969 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 47,979 psi | 75% | 3028 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 80% | 46,731 psi | 73% | 3041 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,398 psi | 73% | 3035 fps | 99.1% |
| Somchem S361 | <<locked>> | 80% | 48,994 psi | 77% | 3015 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 52,736 psi | 83% | 3104 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,123 psi | 74% | 3012 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 80% | 41,133 psi | 64% | 2877 fps | 98.5% |
| Vihtavuori N170 | <<locked>> | 92% | 52,982 psi | 83% | 3127 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 46,499 psi | 73% | 3018 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,571 psi | 71% | 3071 fps | 97.6% |
| Vihtavuori N565 | <<locked>> | 80% | 37,927 psi | 59% | 2867 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 86% | 41,162 psi | 65% | 2986 fps | 95.2% |
| Vihtavuori N570 | 106.5 gr | 92% | 48,588 psi | 76% | 3186 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,089 psi | 63% | 2992 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,482 psi | 68% | 2936 fps | 98.6% |
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 54 powders for .30-378 Weath. Mag. loaded with the .308 | 165gr | Barnes BND SPIT-FIRE. ADI AR 2218 delivers the highest muzzle velocity at 3,353 fps; across all powders the maximum-charge window runs from 2,080 fps to 3,353 fps. ADI AR 2218 gives the best case fill at 100 %, and 54 of the 54 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 165.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, Alliant Reloder-50, 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 N570 rank at the top here: for .30-378 Weath. Mag. with the .308 | 165gr | Barnes BND SPIT-FIRE 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.