Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 167gr | Peregrine VLR-4 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% | 55,550 psi | 87% | 3127 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 53,737 psi | 84% | 3232 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 86% | 54,766 psi | 86% | 3238 fps | 99% |
| ADI AR 2209 | <<locked>> | 86% | 57,246 psi | 90% | 3232 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 55,709 psi | 87% | 3241 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 96% | 54,476 psi | 85% | 3215 fps | 99.8% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 54,926 psi | 86% | 3327 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,246 psi | 90% | 3297 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,334 psi | 90% | 3215 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,724 psi | 89% | 3215 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,014 psi | 88% | 3235 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 54,070 psi | 85% | 3140 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 54,360 psi | 85% | 3212 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 54,549 psi | 85% | 3225 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,637 psi | 89% | 3307 fps | 98% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 51,721 psi | 81% | 3205 fps | 96.5% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,478 psi | 89% | 3196 fps | 98.1% |
| Bofors RP15 | <<locked>> | 90% | 55,376 psi | 87% | 3222 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 54,143 psi | 85% | 3222 fps | 99.7% |
| Bofors RP5 | <<locked>> | 88% | 56,014 psi | 88% | 3235 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 55,898 psi | 88% | 3235 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 54,795 psi | 86% | 3169 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,537 psi | 90% | 3215 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,261 psi | 90% | 3127 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,551 psi | 90% | 3366 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,521 psi | 59% | 2067 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,753 psi | 87% | 3143 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,304 psi | 88% | 3143 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,230 psi | 87% | 3146 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 88% | 54,099 psi | 85% | 3222 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,025 psi | 82% | 3199 fps | 99.5% |
| Lovex S071 | <<locked>> | 94% | 57,305 psi | 90% | 3153 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,000 psi | 89% | 3202 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 53,243 psi | 83% | 3228 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,202 psi | 88% | 3251 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,114 psi | 86% | 3241 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 56,927 psi | 89% | 3199 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 53,621 psi | 84% | 3166 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,421 psi | 60% | 2116 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 54,157 psi | 85% | 3284 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 53,476 psi | 84% | 3238 fps | 99% |
| Rottweil R 904 | <<locked>> | 84% | 54,128 psi | 85% | 3133 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 86% | 56,463 psi | 88% | 3205 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,072 psi | 88% | 3202 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 55,492 psi | 87% | 3123 fps | 99.3% |
| Somchem S365 | <<locked>> | 82% | 55,680 psi | 87% | 3136 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,637 psi | 89% | 3169 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 56,855 psi | 89% | 3156 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 55,869 psi | 88% | 3169 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 86% | 55,680 psi | 87% | 3166 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,680 psi | 87% | 3255 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 92% | 56,333 psi | 88% | 3238 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 94% | 54,172 psi | 85% | 3245 fps | 98.7% |
| Vihtavuori N570 | <<locked>> | 96% | 55,521 psi | 87% | 3314 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 53,853 psi | 84% | 3225 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,797 psi | 89% | 3169 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 42,061 psi | 66% | 2884 fps | 99.7% |
| Accurate High Country | <<locked>> | 80% | 46,557 psi | 73% | 3091 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 80% | 43,976 psi | 69% | 3022 fps | 96.7% |
| ADI AR 2209 | <<locked>> | 80% | 46,615 psi | 73% | 3035 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 80% | 41,785 psi | 65% | 2966 fps | 97.2% |
| ADI AR 2217 | <<locked>> | 84% | 35,578 psi | 56% | 2805 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 96% | 47,224 psi | 74% | 3163 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 82% | 30,269 psi | 47% | 2694 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,548 psi | 84% | 3156 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,383 psi | 73% | 3025 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,409 psi | 66% | 2969 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,104 psi | 64% | 2910 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,534 psi | 56% | 2831 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,702 psi | 73% | 3087 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 48,341 psi | 76% | 3150 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 98% | 47,863 psi | 75% | 3127 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 46,354 psi | 73% | 3005 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 39,436 psi | 62% | 2900 fps | 97.6% |
| Bofors RP30 | <<locked>> | 82% | 35,433 psi | 56% | 2818 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 42,409 psi | 66% | 2969 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 80% | 33,620 psi | 53% | 2753 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 80% | 44,411 psi | 70% | 2969 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,584 psi | 68% | 2953 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,140 psi | 79% | 3018 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 34,592 psi | 54% | 2864 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,094 psi | 44% | 1854 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,286 psi | 82% | 3084 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 52,707 psi | 83% | 3084 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,484 psi | 71% | 2963 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 80% | 40,437 psi | 63% | 2943 fps | 96.9% |
| IMR 8133 Enduron | <<locked>> | 90% | 36,622 psi | 57% | 2867 fps | 95.8% |
| Lovex S071 | <<locked>> | 80% | 36,085 psi | 57% | 2749 fps | 98.8% |
| Norma 204 | <<locked>> | 80% | 53,156 psi | 83% | 3140 fps | 99.8% |
| Norma 217 | <<locked>> | 86% | 31,966 psi | 50% | 2756 fps | 96.2% |
| Norma MRP | <<locked>> | 80% | 45,136 psi | 71% | 3048 fps | 99.7% |
| Ramshot Grand | <<locked>> | 80% | 40,451 psi | 63% | 2953 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 80% | 53,200 psi | 83% | 3136 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,376 psi | 57% | 2815 fps | 97.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,819 psi | 45% | 1896 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 33,895 psi | 53% | 2835 fps | 97.8% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 39,059 psi | 61% | 2933 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 47,384 psi | 74% | 3009 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 80% | 46,006 psi | 72% | 3015 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,672 psi | 72% | 3012 fps | 99.1% |
| Somchem S361 | <<locked>> | 80% | 48,312 psi | 76% | 2992 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 51,982 psi | 81% | 3081 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,340 psi | 73% | 2986 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 80% | 40,379 psi | 63% | 2851 fps | 98.5% |
| Vihtavuori N170 | <<locked>> | 92% | 52,156 psi | 82% | 3104 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 80% | 45,571 psi | 71% | 2992 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,831 psi | 70% | 3041 fps | 97.5% |
| Vihtavuori N565 | <<locked>> | 80% | 36,999 psi | 58% | 2835 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 86% | 40,321 psi | 63% | 2956 fps | 95% |
| Vihtavuori N570 | <<locked>> | 92% | 47,732 psi | 75% | 3159 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,189 psi | 61% | 2959 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,786 psi | 67% | 2910 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 | 167gr | Peregrine VLR-4. Hodgdon Retumbo delivers the highest muzzle velocity at 3,366 fps; across all powders the maximum-charge window runs from 2,067 fps to 3,366 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 167.0 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.