Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | Peregrine VLR-4 bullet and 65 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% | 56,115 psi | 88% | 3274 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,333 psi | 88% | 3304 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 54,186 psi | 85% | 3376 fps | 99% |
| Accurate MAGPRO | <<locked>> | 88% | 55,274 psi | 87% | 3379 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 86% | 53,969 psi | 85% | 3314 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 90% | 56,188 psi | 88% | 3389 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 98% | 54,607 psi | 86% | 3350 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,156 psi | 83% | 3369 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 53,983 psi | 85% | 3310 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,305 psi | 90% | 3366 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,434 psi | 88% | 3383 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 54,302 psi | 85% | 3287 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 54,389 psi | 85% | 3356 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 54,708 psi | 86% | 3369 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,623 psi | 89% | 3435 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,232 psi | 90% | 3340 fps | 97.4% |
| Bofors RP15 | <<locked>> | 92% | 55,622 psi | 87% | 3363 fps | 99.7% |
| Bofors RP30 | <<locked>> | 96% | 54,085 psi | 85% | 3353 fps | 99.3% |
| Bofors RP5 | <<locked>> | 90% | 56,434 psi | 88% | 3383 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 96% | 56,246 psi | 88% | 3379 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 88% | 55,376 psi | 87% | 3310 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 54,331 psi | 85% | 3294 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 54,172 psi | 85% | 3225 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,232 psi | 90% | 3507 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,289 psi | 58% | 2172 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,521 psi | 89% | 3297 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 56,884 psi | 89% | 3297 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,014 psi | 88% | 3294 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 90% | 54,288 psi | 85% | 3360 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,298 psi | 76% | 3258 fps | 98.3% |
| Lovex S065 | <<locked>> | 82% | 56,463 psi | 88% | 3268 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,839 psi | 86% | 3264 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,667 psi | 90% | 3301 fps | 100% |
| Norma 204 | <<locked>> | 82% | 54,041 psi | 85% | 3291 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 48,979 psi | 77% | 3287 fps | 99.7% |
| Norma MRP | <<locked>> | 88% | 56,449 psi | 88% | 3399 fps | 100% |
| Norma URP | <<locked>> | 82% | 54,752 psi | 86% | 3284 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 55,405 psi | 87% | 3386 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 84% | 57,711 psi | 90% | 3353 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 53,969 psi | 85% | 3304 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,247 psi | 60% | 2224 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,913 psi | 89% | 3330 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 55,637 psi | 87% | 3360 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 54,317 psi | 85% | 3425 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 53,592 psi | 84% | 3369 fps | 98.3% |
| Rottweil R 904 | <<locked>> | 86% | 54,752 psi | 86% | 3281 fps | 99% |
| Rottweil R 905 | <<locked>> | 88% | 57,014 psi | 89% | 3356 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,463 psi | 88% | 3268 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,839 psi | 86% | 3264 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,477 psi | 87% | 3215 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,608 psi | 89% | 3350 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 56,376 psi | 88% | 3264 fps | 98.8% |
| Somchem S365 | <<locked>> | 84% | 56,072 psi | 88% | 3291 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,334 psi | 90% | 3320 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 56,318 psi | 88% | 3278 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,261 psi | 90% | 3301 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 55,709 psi | 87% | 3281 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,043 psi | 88% | 3317 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 55,999 psi | 88% | 3396 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 94% | 56,710 psi | 89% | 3379 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 96% | 54,201 psi | 85% | 3376 fps | 97.9% |
| Vihtavuori N570 | <<locked>> | 98% | 55,405 psi | 87% | 3442 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,159 psi | 88% | 3222 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 53,606 psi | 84% | 3369 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,493 psi | 90% | 3314 fps | 99.8% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 39,465 psi | 62% | 2953 fps | 98.8% |
| Accurate 4350 | <<locked>> | 80% | 52,591 psi | 82% | 3241 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 43,468 psi | 68% | 3150 fps | 96.7% |
| Accurate MAGPRO | <<locked>> | 82% | 44,324 psi | 69% | 3153 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 43,859 psi | 69% | 3110 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 80% | 39,218 psi | 61% | 3025 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 88% | 38,247 psi | 60% | 2989 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 86% | 32,416 psi | 51% | 2871 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,430 psi | 79% | 3248 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,830 psi | 69% | 3100 fps | 97.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,726 psi | 62% | 3035 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,319 psi | 60% | 2982 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,040 psi | 52% | 2884 fps | 97.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,366 psi | 68% | 3156 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 52,417 psi | 82% | 3353 fps | 96.1% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 50,125 psi | 79% | 3205 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 36,840 psi | 58% | 2956 fps | 95.5% |
| Bofors RP30 | <<locked>> | 86% | 37,971 psi | 60% | 3005 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 39,726 psi | 62% | 3035 fps | 96.8% |
| Hodgdon H1000 | <<locked>> | 84% | 36,332 psi | 57% | 2943 fps | 95.1% |
| Hodgdon H4831 | <<locked>> | 80% | 41,829 psi | 66% | 3035 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,060 psi | 64% | 3018 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,282 psi | 74% | 3110 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 82% | 34,563 psi | 54% | 2979 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,905 psi | 44% | 1949 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,588 psi | 78% | 3169 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 49,719 psi | 78% | 3176 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,105 psi | 68% | 3035 fps | 96.1% |
| IMR 7828 SSC | <<locked>> | 82% | 40,582 psi | 64% | 3068 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 94% | 38,986 psi | 61% | 3045 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 52,968 psi | 83% | 3212 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,430 psi | 81% | 3205 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 33,750 psi | 53% | 2805 fps | 97.2% |
| Norma 204 | <<locked>> | 80% | 50,285 psi | 79% | 3219 fps | 99% |
| Norma 217 | <<locked>> | 90% | 33,910 psi | 53% | 2930 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 42,076 psi | 66% | 3114 fps | 98.6% |
| Norma URP | <<locked>> | 80% | 51,227 psi | 80% | 3225 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 37,565 psi | 59% | 3002 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 50,270 psi | 79% | 3225 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,649 psi | 53% | 2861 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,572 psi | 45% | 1995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,982 psi | 83% | 3264 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,648 psi | 81% | 3291 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 31,473 psi | 49% | 2867 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 42,221 psi | 66% | 3130 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 44,817 psi | 70% | 3081 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 80% | 43,221 psi | 68% | 3087 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,968 psi | 83% | 3212 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,430 psi | 81% | 3205 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,953 psi | 81% | 3156 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,888 psi | 67% | 3077 fps | 97.7% |
| Somchem S361 | <<locked>> | 80% | 45,861 psi | 72% | 3068 fps | 96.7% |
| Somchem S365 | <<locked>> | 80% | 48,733 psi | 76% | 3169 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,700 psi | 68% | 3061 fps | 98.6% |
| Vihtavuori N160 | <<locked>> | 80% | 52,736 psi | 83% | 3219 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,971 psi | 60% | 2913 fps | 96.9% |
| Vihtavuori N550 | <<locked>> | 80% | 51,967 psi | 81% | 3219 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,627 psi | 67% | 3068 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,945 psi | 66% | 3100 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 84% | 39,769 psi | 62% | 3022 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 92% | 46,717 psi | 73% | 3225 fps | 96.1% |
| Vihtavuori N570 | <<locked>> | 96% | 51,459 psi | 81% | 3366 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,388 psi | 82% | 3163 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,694 psi | 56% | 3015 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,089 psi | 63% | 2972 fps | 96.9% |
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 | 150gr | Peregrine VLR-4. Hodgdon Retumbo delivers the highest muzzle velocity at 3,507 fps; across all powders the maximum-charge window runs from 2,172 fps to 3,507 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 58–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-33 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.