Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 136gr | Peregrine VLR-4 bullet and 70 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>> | 92% | 56,739 psi | 89% | 3409 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,276 psi | 90% | 3451 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 54,723 psi | 86% | 3507 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 90% | 55,898 psi | 88% | 3510 fps | 97.7% |
| ADI AR 2209 | <<locked>> | 88% | 54,810 psi | 86% | 3451 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 92% | 56,942 psi | 89% | 3524 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 55,158 psi | 86% | 3474 fps | 98.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,690 psi | 78% | 3419 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,737 psi | 86% | 3458 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 54,491 psi | 85% | 3438 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,087 psi | 89% | 3517 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 92% | 54,592 psi | 86% | 3422 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 54,694 psi | 86% | 3488 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 55,332 psi | 87% | 3510 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 56,260 psi | 88% | 3497 fps | 99.4% |
| Bofors RP30 | <<locked>> | 98% | 54,476 psi | 85% | 3484 fps | 98.8% |
| Bofors RP5 | <<locked>> | 92% | 57,087 psi | 89% | 3517 fps | 99.5% |
| Bofors RP7 | <<locked>> | 82% | 55,317 psi | 87% | 3392 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 98% | 56,956 psi | 89% | 3507 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 82% | 55,288 psi | 87% | 3448 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 82% | 57,464 psi | 90% | 3465 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 90% | 56,304 psi | 88% | 3448 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 55,288 psi | 87% | 3428 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,984 psi | 86% | 3369 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 57,551 psi | 90% | 3642 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,217 psi | 88% | 3481 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,101 psi | 58% | 2270 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,421 psi | 90% | 3435 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,797 psi | 89% | 3419 fps | 99.9% |
| IMR 4831 | <<locked>> | 86% | 57,638 psi | 90% | 3442 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,029 psi | 89% | 3432 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 92% | 54,911 psi | 86% | 3494 fps | 98.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,962 psi | 70% | 3297 fps | 96.6% |
| Lovex S065 | <<locked>> | 84% | 57,537 psi | 90% | 3419 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,782 psi | 87% | 3409 fps | 99.9% |
| Lovex S071 | <<locked>> | 96% | 54,331 psi | 85% | 3366 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,969 psi | 86% | 3432 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 45,353 psi | 71% | 3327 fps | 98.7% |
| Norma MRP | <<locked>> | 90% | 57,145 psi | 90% | 3537 fps | 99.9% |
| Norma URP | <<locked>> | 84% | 55,550 psi | 87% | 3428 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 55,927 psi | 88% | 3517 fps | 99% |
| Ramshot Hunter | <<locked>> | 84% | 54,737 psi | 86% | 3432 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 54,621 psi | 86% | 3435 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,985 psi | 60% | 2323 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 53,780 psi | 84% | 3406 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,536 psi | 89% | 3507 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 54,766 psi | 86% | 3556 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 54,114 psi | 85% | 3494 fps | 97.7% |
| Rottweil R 904 | <<locked>> | 88% | 55,593 psi | 87% | 3415 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 88% | 53,896 psi | 84% | 3425 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 82% | 55,317 psi | 87% | 3392 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,537 psi | 90% | 3419 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,782 psi | 87% | 3409 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,782 psi | 89% | 3360 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 57,363 psi | 90% | 3488 fps | 99.5% |
| Somchem S361 | <<locked>> | 88% | 57,479 psi | 90% | 3402 fps | 98.3% |
| Somchem S365 | <<locked>> | 86% | 56,608 psi | 89% | 3432 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 54,418 psi | 85% | 3392 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 82% | 57,653 psi | 90% | 3353 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,377 psi | 90% | 3422 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 54,230 psi | 85% | 3366 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 84% | 56,666 psi | 89% | 3425 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,434 psi | 88% | 3451 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 56,724 psi | 89% | 3533 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 96% | 57,261 psi | 90% | 3510 fps | 98.7% |
| Vihtavuori N568 | <<locked>> | 98% | 54,723 psi | 86% | 3504 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,319 psi | 90% | 3363 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,434 psi | 87% | 3451 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 92% | 53,693 psi | 84% | 3504 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 54,447 psi | 85% | 3383 fps | 99.2% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 37,057 psi | 58% | 3002 fps | 97.5% |
| Accurate 4350 | <<locked>> | 80% | 49,647 psi | 78% | 3317 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 43,976 psi | 69% | 3278 fps | 95.9% |
| Accurate MAGPRO | <<locked>> | 86% | 48,269 psi | 76% | 3356 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 41,394 psi | 65% | 3163 fps | 96.2% |
| ADI AR 2213 | <<locked>> | 84% | 42,627 psi | 67% | 3222 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 92% | 41,524 psi | 65% | 3179 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 90% | 34,925 psi | 55% | 3045 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,616 psi | 75% | 3327 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,423 psi | 65% | 3156 fps | 96.2% |
| Alliant Reloder-22 | <<locked>> | 82% | 40,045 psi | 63% | 3153 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,839 psi | 56% | 3035 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,937 psi | 48% | 2920 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,292 psi | 63% | 3205 fps | 99.3% |
| Bofors RP15 | <<locked>> | 84% | 39,769 psi | 62% | 3140 fps | 95.6% |
| Bofors RP30 | <<locked>> | 90% | 40,814 psi | 64% | 3182 fps | 95.3% |
| Bofors RP5 | <<locked>> | 82% | 40,045 psi | 63% | 3153 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 51,721 psi | 81% | 3323 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 88% | 39,450 psi | 62% | 3130 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 51,459 psi | 81% | 3376 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 53,780 psi | 84% | 3399 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 84% | 45,643 psi | 72% | 3232 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 84% | 44,657 psi | 70% | 3209 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,715 psi | 70% | 3186 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 37,376 psi | 59% | 3169 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 52,112 psi | 82% | 3409 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,731 psi | 43% | 2041 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,195 psi | 74% | 3238 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,185 psi | 83% | 3356 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 47,065 psi | 74% | 3251 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 43,830 psi | 69% | 3163 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 86% | 44,135 psi | 69% | 3268 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 41,887 psi | 66% | 3225 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 50,546 psi | 79% | 3291 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 48,979 psi | 77% | 3281 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 31,676 psi | 50% | 2851 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 47,747 psi | 75% | 3284 fps | 97.8% |
| Norma 217 | <<locked>> | 94% | 36,405 psi | 57% | 3104 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 39,363 psi | 62% | 3159 fps | 97.1% |
| Norma URP | <<locked>> | 80% | 48,530 psi | 76% | 3301 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 40,959 psi | 64% | 3199 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 47,630 psi | 75% | 3294 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 36,709 psi | 58% | 3048 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,340 psi | 44% | 2087 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,038 psi | 78% | 3340 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,573 psi | 76% | 3360 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 34,243 psi | 54% | 3058 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 45,948 psi | 72% | 3323 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 42,525 psi | 67% | 3140 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 40,712 psi | 64% | 3136 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 80% | 51,721 psi | 81% | 3323 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,546 psi | 79% | 3291 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 48,979 psi | 77% | 3281 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,588 psi | 78% | 3232 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,379 psi | 63% | 3133 fps | 96% |
| Somchem S361 | <<locked>> | 80% | 43,569 psi | 68% | 3123 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 45,832 psi | 72% | 3245 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,263 psi | 65% | 3117 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 80% | 53,867 psi | 84% | 3294 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 50,009 psi | 78% | 3294 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 38,406 psi | 60% | 3035 fps | 96% |
| Vihtavuori N550 | <<locked>> | 80% | 49,443 psi | 77% | 3297 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,001 psi | 63% | 3130 fps | 99.6% |
| Vihtavuori N560 | <<locked>> | 84% | 45,716 psi | 72% | 3304 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 88% | 42,989 psi | 67% | 3212 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 94% | 47,021 psi | 74% | 3343 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,705 psi | 78% | 3241 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,634 psi | 81% | 3379 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,663 psi | 51% | 3054 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,855 psi | 59% | 3028 fps | 95.1% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 76 powders for .30-378 Weath. Mag. loaded with the .308 | 136gr | Peregrine VLR-4. Hodgdon Retumbo delivers the highest muzzle velocity at 3,642 fps; across all powders the maximum-charge window runs from 2,270 fps to 3,642 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 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 136.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, 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, ADI AR 2218, IMR 7977 Enduron, Vihtavuori N170 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.