Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 165gr | AERO SOLR,- smax:18.90 bullet and 60 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Hodgdon Retumbo and ReloadSwiss RS 76.
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% | 54,737 psi | 86% | 3130 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 56,797 psi | 89% | 3301 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 86% | 53,954 psi | 85% | 3238 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 86% | 56,449 psi | 88% | 3232 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 88% | 54,853 psi | 86% | 3241 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 98% | 57,435 psi | 90% | 3278 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 53,969 psi | 85% | 3320 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 56,115 psi | 88% | 3297 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 56,565 psi | 89% | 3225 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 82% | 56,492 psi | 89% | 3222 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,941 psi | 88% | 3219 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 88% | 55,201 psi | 87% | 3235 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 90% | 56,971 psi | 89% | 3199 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 57,348 psi | 90% | 3274 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 57,725 psi | 90% | 3291 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 55,564 psi | 87% | 3304 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 55,666 psi | 87% | 3199 fps | 97.8% |
| Bofors RP15 | <<locked>> | 90% | 54,578 psi | 86% | 3225 fps | 99.9% |
| Bofors RP30 | <<locked>> | 96% | 57,072 psi | 89% | 3287 fps | 99.9% |
| Bofors RP5 | <<locked>> | 88% | 55,201 psi | 87% | 3235 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 94% | 55,056 psi | 86% | 3238 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 86% | 54,041 psi | 85% | 3173 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 88% | 56,768 psi | 89% | 3219 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 56,623 psi | 89% | 3133 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 56,347 psi | 88% | 3366 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,463 psi | 59% | 2077 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,042 psi | 86% | 3146 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 55,506 psi | 87% | 3146 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 54,549 psi | 85% | 3153 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 90% | 57,101 psi | 89% | 3287 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 51,169 psi | 80% | 3202 fps | 99.4% |
| Lovex S070 | <<locked>> | 82% | 57,058 psi | 89% | 3176 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 56,492 psi | 89% | 3156 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,376 psi | 88% | 3209 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 52,127 psi | 82% | 3228 fps | 100% |
| Norma MRP | <<locked>> | 86% | 55,129 psi | 86% | 3251 fps | 100% |
| Norma URP | <<locked>> | 82% | 57,116 psi | 90% | 3196 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 54,157 psi | 85% | 3241 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 82% | 56,333 psi | 88% | 3202 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 56,913 psi | 89% | 3232 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,363 psi | 60% | 2123 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 57,653 psi | 90% | 3356 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 56,840 psi | 89% | 3314 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 86% | 57,014 psi | 89% | 3199 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 86% | 55,637 psi | 87% | 3209 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 82% | 57,058 psi | 89% | 3176 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,653 psi | 90% | 3127 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 55,245 psi | 87% | 3205 fps | 99.9% |
| Somchem S361 | <<locked>> | 84% | 54,810 psi | 86% | 3123 fps | 99.1% |
| Somchem S365 | <<locked>> | 82% | 54,810 psi | 86% | 3140 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,854 psi | 88% | 3173 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 55,927 psi | 88% | 3159 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 55,143 psi | 86% | 3169 fps | 96% |
| Vihtavuori N555 | <<locked>> | 86% | 54,984 psi | 86% | 3173 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 54,679 psi | 86% | 3251 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 92% | 55,521 psi | 87% | 3241 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 96% | 57,334 psi | 90% | 3317 fps | 99.1% |
| Vihtavuori N570 | <<locked>> | 96% | 54,418 psi | 85% | 3310 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 90% | 57,058 psi | 89% | 3291 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,869 psi | 88% | 3173 fps | 99.9% |
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% | 41,495 psi | 65% | 2887 fps | 99.6% |
| Accurate High Country | <<locked>> | 80% | 45,788 psi | 72% | 3091 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 80% | 43,366 psi | 68% | 3022 fps | 96.3% |
| ADI AR 2209 | <<locked>> | 80% | 45,905 psi | 72% | 3035 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 80% | 41,075 psi | 64% | 2963 fps | 96.8% |
| ADI AR 2217 | <<locked>> | 86% | 37,536 psi | 59% | 2871 fps | 96.1% |
| ADI AR 2218 | <<locked>> | 96% | 46,369 psi | 73% | 3156 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 82% | 29,733 psi | 47% | 2690 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,267 psi | 73% | 3035 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,881 psi | 83% | 3163 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,832 psi | 72% | 3028 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,698 psi | 65% | 2969 fps | 98.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,495 psi | 63% | 2913 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,882 psi | 55% | 2831 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,847 psi | 72% | 3087 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 47,500 psi | 74% | 3150 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,803 psi | 72% | 3005 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 38,754 psi | 61% | 2897 fps | 97.2% |
| Bofors RP30 | <<locked>> | 82% | 34,766 psi | 54% | 2815 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 41,698 psi | 65% | 2969 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 82% | 35,607 psi | 56% | 2822 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 80% | 43,729 psi | 69% | 2969 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,902 psi | 67% | 2949 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,530 psi | 78% | 3022 fps | 100% |
| Hodgdon Retumbo | 88.9 gr | 80% | 34,069 psi | 53% | 2864 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,123 psi | 44% | 1864 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,561 psi | 81% | 3087 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 51,924 psi | 81% | 3091 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,860 psi | 70% | 2963 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 80% | 39,856 psi | 62% | 2943 fps | 96.5% |
| IMR 8133 Enduron | <<locked>> | 90% | 35,911 psi | 56% | 2861 fps | 95.4% |
| Lovex S070 | <<locked>> | 80% | 53,490 psi | 84% | 3117 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,549 psi | 56% | 2746 fps | 98.6% |
| Norma 204 | <<locked>> | 80% | 52,562 psi | 82% | 3143 fps | 99.7% |
| Norma 217 | <<locked>> | 86% | 31,314 psi | 49% | 2749 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 44,338 psi | 69% | 3048 fps | 99.5% |
| Norma URP | <<locked>> | 80% | 53,417 psi | 84% | 3136 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,813 psi | 62% | 2953 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 80% | 52,591 psi | 82% | 3143 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,665 psi | 56% | 2812 fps | 97.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,834 psi | 45% | 1906 fps | 100% |
| ReloadSwiss RS 76 | 95.1 gr | 80% | 33,272 psi | 52% | 2828 fps | 97.3% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 41,510 psi | 65% | 3005 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 46,717 psi | 73% | 3009 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 80% | 45,295 psi | 71% | 3015 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 80% | 53,490 psi | 84% | 3117 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,940 psi | 85% | 3068 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,947 psi | 70% | 3012 fps | 98.9% |
| Somchem S361 | <<locked>> | 80% | 47,805 psi | 75% | 2995 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 51,126 psi | 80% | 3084 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,629 psi | 72% | 2986 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 80% | 39,842 psi | 62% | 2851 fps | 98.2% |
| Vihtavuori N170 | <<locked>> | 92% | 51,445 psi | 81% | 3104 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 44,918 psi | 70% | 2995 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,121 psi | 69% | 3041 fps | 97.2% |
| Vihtavuori N565 | <<locked>> | 82% | 39,073 psi | 61% | 2900 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 88% | 42,612 psi | 67% | 3025 fps | 95.7% |
| Vihtavuori N570 | 106.1 gr | 92% | 46,891 psi | 73% | 3156 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,450 psi | 60% | 2963 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,090 psi | 66% | 2910 fps | 98.2% |
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 60 powders for .30-378 Weath. Mag. loaded with the .308 | 165gr | AERO SOLR,- smax:18.90. Hodgdon Retumbo delivers the highest muzzle velocity at 3,366 fps; across all powders the maximum-charge window runs from 2,077 fps to 3,366 fps. ADI AR 2218 gives the best case fill at 100 %, and 60 of the 60 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 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .30-378 Weath. Mag. with the .308 | 165gr | AERO SOLR,- smax:18.90 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.