Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 154gr | Peregrine VLR-5 bullet and 66 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>> | 90% | 57,203 psi | 90% | 3258 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,392 psi | 90% | 3284 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 55,332 psi | 87% | 3363 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 88% | 56,434 psi | 88% | 3369 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 86% | 54,955 psi | 86% | 3294 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 90% | 57,334 psi | 90% | 3376 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 98% | 55,796 psi | 87% | 3337 fps | 99.6% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,373 psi | 82% | 3366 fps | 96.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,418 psi | 85% | 3356 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 54,998 psi | 86% | 3291 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 54,679 psi | 86% | 3284 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,551 psi | 90% | 3366 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,419 psi | 87% | 3268 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,622 psi | 87% | 3340 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 55,985 psi | 88% | 3356 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 53,751 psi | 84% | 3350 fps | 96.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,447 psi | 85% | 3261 fps | 97.1% |
| Bofors RP15 | <<locked>> | 92% | 56,724 psi | 89% | 3350 fps | 99.8% |
| Bofors RP30 | <<locked>> | 96% | 55,303 psi | 87% | 3343 fps | 99.6% |
| Bofors RP5 | <<locked>> | 90% | 57,551 psi | 90% | 3366 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 96% | 57,464 psi | 90% | 3363 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 88% | 56,391 psi | 88% | 3297 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,347 psi | 87% | 3281 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,158 psi | 86% | 3205 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 54,650 psi | 86% | 3425 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,362 psi | 59% | 2149 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,435 psi | 90% | 3274 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 54,070 psi | 85% | 3215 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,927 psi | 89% | 3281 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 90% | 55,434 psi | 87% | 3346 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,487 psi | 78% | 3251 fps | 98.8% |
| Lovex S065 | <<locked>> | 82% | 57,334 psi | 90% | 3248 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,724 psi | 87% | 3248 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 54,984 psi | 86% | 3222 fps | 100% |
| Norma 204 | <<locked>> | 82% | 54,998 psi | 86% | 3274 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 50,270 psi | 79% | 3278 fps | 99.9% |
| Norma MRP | <<locked>> | 88% | 57,638 psi | 90% | 3383 fps | 100% |
| Norma URP | <<locked>> | 82% | 55,709 psi | 87% | 3268 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,695 psi | 89% | 3373 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 82% | 54,926 psi | 86% | 3271 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,216 psi | 87% | 3291 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,334 psi | 60% | 2198 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,768 psi | 89% | 3343 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,724 psi | 87% | 3415 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 54,940 psi | 86% | 3363 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 86% | 55,680 psi | 87% | 3264 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 86% | 54,172 psi | 85% | 3274 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,334 psi | 90% | 3248 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,724 psi | 87% | 3248 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,333 psi | 88% | 3196 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,667 psi | 90% | 3333 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 57,319 psi | 90% | 3251 fps | 99.1% |
| Somchem S365 | <<locked>> | 84% | 57,174 psi | 90% | 3271 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 54,520 psi | 85% | 3238 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 82% | 57,276 psi | 90% | 3258 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 54,636 psi | 86% | 3225 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 96% | 57,696 psi | 90% | 3297 fps | 96% |
| Vihtavuori N550 | <<locked>> | 82% | 56,666 psi | 89% | 3261 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,159 psi | 90% | 3297 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,145 psi | 90% | 3383 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 92% | 54,027 psi | 85% | 3297 fps | 99% |
| Vihtavuori N568 | <<locked>> | 96% | 55,477 psi | 87% | 3369 fps | 98.4% |
| Vihtavuori N570 | <<locked>> | 98% | 56,753 psi | 89% | 3435 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,130 psi | 90% | 3199 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,085 psi | 86% | 3356 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 54,592 psi | 86% | 3235 fps | 99.7% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 40,306 psi | 63% | 2940 fps | 99.2% |
| Accurate 4350 | <<locked>> | 80% | 53,606 psi | 84% | 3222 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 44,425 psi | 70% | 3140 fps | 97.3% |
| Accurate MAGPRO | <<locked>> | 80% | 42,018 psi | 66% | 3071 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 44,701 psi | 70% | 3094 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 80% | 40,016 psi | 63% | 3015 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 88% | 39,044 psi | 61% | 2982 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 98% | 48,515 psi | 76% | 3278 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 84% | 30,879 psi | 48% | 2792 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,387 psi | 81% | 3232 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,657 psi | 70% | 3087 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,582 psi | 64% | 3022 fps | 97.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,175 psi | 61% | 2966 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,779 psi | 53% | 2877 fps | 98.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,440 psi | 70% | 3146 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 49,588 psi | 78% | 3271 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 47,703 psi | 75% | 3123 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 37,637 psi | 59% | 2946 fps | 96.2% |
| Bofors RP30 | <<locked>> | 86% | 38,885 psi | 61% | 2995 fps | 96% |
| Bofors RP5 | <<locked>> | 80% | 40,582 psi | 64% | 3022 fps | 97.3% |
| Hodgdon H1000 | <<locked>> | 84% | 37,101 psi | 58% | 2936 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 80% | 42,641 psi | 67% | 3022 fps | 96% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,858 psi | 66% | 3005 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,182 psi | 76% | 3091 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 82% | 35,360 psi | 55% | 2976 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,963 psi | 44% | 1926 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,401 psi | 79% | 3153 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 50,633 psi | 79% | 3159 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,830 psi | 69% | 3022 fps | 96.6% |
| IMR 7828 SSC | <<locked>> | 80% | 38,653 psi | 61% | 2992 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 92% | 37,231 psi | 58% | 2969 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 53,795 psi | 84% | 3192 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,286 psi | 82% | 3186 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,490 psi | 54% | 2795 fps | 97.7% |
| Norma 204 | <<locked>> | 80% | 51,184 psi | 80% | 3205 fps | 99.2% |
| Norma 217 | <<locked>> | 88% | 32,401 psi | 51% | 2854 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 43,018 psi | 67% | 3104 fps | 99% |
| Norma URP | <<locked>> | 80% | 52,156 psi | 82% | 3205 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,450 psi | 60% | 2995 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 51,184 psi | 80% | 3209 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,461 psi | 54% | 2854 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,660 psi | 45% | 1972 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,721 psi | 83% | 3278 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 32,227 psi | 51% | 2867 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 43,352 psi | 68% | 3127 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 45,600 psi | 71% | 3068 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 80% | 44,077 psi | 69% | 3071 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,795 psi | 84% | 3192 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,286 psi | 82% | 3186 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,779 psi | 83% | 3136 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,743 psi | 69% | 3064 fps | 98.2% |
| Somchem S361 | <<locked>> | 80% | 46,659 psi | 73% | 3051 fps | 97.2% |
| Somchem S365 | <<locked>> | 80% | 49,719 psi | 78% | 3150 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,541 psi | 70% | 3045 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 80% | 53,650 psi | 84% | 3199 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,740 psi | 61% | 2904 fps | 97.4% |
| Vihtavuori N170 | <<locked>> | 94% | 53,708 psi | 84% | 3222 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 52,866 psi | 83% | 3199 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,526 psi | 68% | 3054 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,844 psi | 67% | 3091 fps | 96.2% |
| Vihtavuori N565 | <<locked>> | 84% | 40,669 psi | 64% | 3015 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 90% | 44,367 psi | 70% | 3143 fps | 95.6% |
| Vihtavuori N570 | <<locked>> | 96% | 52,736 psi | 83% | 3360 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,301 psi | 84% | 3143 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,796 psi | 58% | 3009 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,886 psi | 64% | 2963 fps | 97.4% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 71 powders for .30-378 Weath. Mag. loaded with the .308 | 154gr | Peregrine VLR-5. Vihtavuori N570 delivers the highest muzzle velocity at 3,435 fps; across all powders the maximum-charge window runs from 2,149 fps to 3,435 fps. ADI AR 2218 gives the best case fill at 100 %, and 71 of the 71 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 154.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-50 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, Alliant Reloder-50, IMR 7977 Enduron, Lovex D100 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.