Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 140gr | Peregrine VLR-5 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>> | 90% | 54,172 psi | 85% | 3327 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 54,462 psi | 85% | 3366 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 55,970 psi | 88% | 3497 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 90% | 57,159 psi | 90% | 3501 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 88% | 55,898 psi | 88% | 3432 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 90% | 54,157 psi | 85% | 3438 fps | 98.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 56,449 psi | 88% | 3465 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 50,937 psi | 80% | 3412 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 55,854 psi | 88% | 3435 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 55,550 psi | 87% | 3422 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 90% | 54,433 psi | 85% | 3428 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 92% | 56,014 psi | 88% | 3402 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 56,043 psi | 88% | 3471 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 56,724 psi | 89% | 3497 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 55,550 psi | 87% | 3389 fps | 96.4% |
| Bofors RP15 | <<locked>> | 94% | 57,464 psi | 90% | 3484 fps | 99.6% |
| Bofors RP30 | <<locked>> | 98% | 55,796 psi | 87% | 3468 fps | 99.2% |
| Bofors RP5 | <<locked>> | 90% | 54,433 psi | 85% | 3428 fps | 99.4% |
| Bofors RP7 | <<locked>> | 82% | 56,231 psi | 88% | 3369 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 96% | 54,157 psi | 85% | 3425 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 82% | 56,347 psi | 88% | 3432 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 90% | 57,406 psi | 90% | 3432 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 56,376 psi | 88% | 3415 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 56,072 psi | 88% | 3346 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 54,882 psi | 86% | 3553 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 82% | 57,406 psi | 90% | 3468 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,173 psi | 58% | 2244 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 54,882 psi | 86% | 3353 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 82% | 57,696 psi | 90% | 3399 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 55,071 psi | 86% | 3356 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 54,302 psi | 85% | 3350 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 92% | 56,159 psi | 88% | 3481 fps | 98.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 46,195 psi | 72% | 3294 fps | 97.3% |
| Lovex S065 | <<locked>> | 82% | 54,940 psi | 86% | 3333 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,956 psi | 89% | 3389 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 55,666 psi | 87% | 3353 fps | 100% |
| Norma 204 | <<locked>> | 84% | 56,028 psi | 88% | 3412 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 46,688 psi | 73% | 3323 fps | 99.2% |
| Norma MRP | <<locked>> | 88% | 54,302 psi | 85% | 3448 fps | 99.9% |
| Norma URP | <<locked>> | 84% | 56,768 psi | 89% | 3412 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 57,406 psi | 90% | 3507 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 84% | 55,796 psi | 87% | 3412 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 56,028 psi | 88% | 3422 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,087 psi | 60% | 2297 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 54,911 psi | 86% | 3389 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 53,505 psi | 84% | 3415 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 56,231 psi | 88% | 3547 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 55,593 psi | 87% | 3488 fps | 98.2% |
| Rottweil R 904 | <<locked>> | 88% | 56,623 psi | 89% | 3399 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 88% | 54,998 psi | 86% | 3409 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 82% | 56,231 psi | 88% | 3369 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 82% | 54,940 psi | 86% | 3333 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,956 psi | 89% | 3389 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 57,711 psi | 90% | 3340 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 54,592 psi | 86% | 3402 fps | 99.4% |
| Somchem S361 | <<locked>> | 86% | 54,679 psi | 86% | 3320 fps | 98.1% |
| Somchem S365 | <<locked>> | 84% | 54,056 psi | 85% | 3353 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 55,492 psi | 87% | 3376 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 82% | 54,621 psi | 86% | 3340 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 55,332 psi | 87% | 3353 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 84% | 57,696 psi | 90% | 3402 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 57,667 psi | 90% | 3435 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 53,954 psi | 85% | 3442 fps | 98.1% |
| Vihtavuori N565 | <<locked>> | 94% | 54,476 psi | 85% | 3422 fps | 98.4% |
| Vihtavuori N568 | <<locked>> | 98% | 56,101 psi | 88% | 3491 fps | 97.8% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 57,290 psi | 90% | 3556 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 54,331 psi | 85% | 3281 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 56,492 psi | 89% | 3432 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 55,245 psi | 87% | 3491 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 55,550 psi | 87% | 3366 fps | 99.4% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 37,913 psi | 59% | 2992 fps | 98% |
| Accurate 4350 | <<locked>> | 80% | 50,691 psi | 79% | 3297 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 41,756 psi | 65% | 3189 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 84% | 45,919 psi | 72% | 3271 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 42,264 psi | 66% | 3153 fps | 96.8% |
| ADI AR 2213 | <<locked>> | 84% | 43,555 psi | 68% | 3209 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 92% | 42,453 psi | 67% | 3169 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 88% | 33,359 psi | 52% | 2969 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 48,617 psi | 76% | 3307 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 42,264 psi | 66% | 3143 fps | 96.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,116 psi | 60% | 3068 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,724 psi | 58% | 3025 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,662 psi | 50% | 2913 fps | 96.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 41,394 psi | 65% | 3196 fps | 99.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 51,967 psi | 81% | 3317 fps | 95.5% |
| Bofors RP15 | <<locked>> | 82% | 37,985 psi | 60% | 3064 fps | 95.2% |
| Bofors RP30 | <<locked>> | 88% | 39,044 psi | 61% | 3107 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 38,116 psi | 60% | 3068 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 52,591 psi | 82% | 3307 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 40,480 psi | 63% | 3127 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 52,504 psi | 82% | 3360 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 82% | 43,250 psi | 68% | 3146 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 84% | 45,571 psi | 71% | 3199 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,643 psi | 72% | 3166 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 84% | 35,636 psi | 56% | 3084 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 53,229 psi | 83% | 3392 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,789 psi | 44% | 2014 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 48,051 psi | 75% | 3222 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 54,041 psi | 85% | 3333 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 48,008 psi | 75% | 3232 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 44,628 psi | 70% | 3146 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 84% | 42,003 psi | 66% | 3182 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 96% | 39,929 psi | 63% | 3146 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 51,430 psi | 81% | 3271 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,864 psi | 78% | 3261 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 32,445 psi | 51% | 2844 fps | 96% |
| Norma 204 | <<locked>> | 80% | 48,689 psi | 76% | 3271 fps | 98.2% |
| Norma 217 | <<locked>> | 92% | 34,766 psi | 54% | 3025 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 40,379 psi | 63% | 3153 fps | 97.6% |
| Norma URP | <<locked>> | 80% | 49,487 psi | 78% | 3281 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 41,989 psi | 66% | 3192 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 48,588 psi | 76% | 3278 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 82% | 34,824 psi | 55% | 2966 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,427 psi | 45% | 2060 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 51,097 psi | 80% | 3320 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,676 psi | 78% | 3346 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 35,099 psi | 55% | 3054 fps | 96.3% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 43,685 psi | 68% | 3238 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 43,366 psi | 68% | 3130 fps | 96% |
| Rottweil R 905 | <<locked>> | 80% | 41,597 psi | 65% | 3127 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 80% | 52,591 psi | 82% | 3307 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 51,430 psi | 81% | 3271 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,864 psi | 78% | 3261 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,430 psi | 79% | 3212 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 41,263 psi | 65% | 3120 fps | 96.6% |
| Somchem S361 | <<locked>> | 80% | 44,396 psi | 70% | 3114 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 46,876 psi | 73% | 3228 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 42,119 psi | 66% | 3104 fps | 97.7% |
| Vihtavuori N160 | <<locked>> | 80% | 51,010 psi | 80% | 3278 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,550 psi | 57% | 2953 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 50,372 psi | 79% | 3278 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,930 psi | 64% | 3114 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 82% | 43,424 psi | 68% | 3219 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 88% | 44,048 psi | 69% | 3205 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 94% | 48,298 psi | 76% | 3337 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 98% | 53,084 psi | 83% | 3474 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,662 psi | 79% | 3222 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 52,649 psi | 83% | 3363 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,779 psi | 53% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,696 psi | 61% | 3015 fps | 95.7% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 77 powders for .30-378 Weath. Mag. loaded with the .308 | 140gr | Peregrine VLR-5. Vihtavuori N570 delivers the highest muzzle velocity at 3,556 fps; across all powders the maximum-charge window runs from 2,244 fps to 3,556 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 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 140.0 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, Alliant Reloder-50, IMR 7977 Enduron 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.