Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 135gr | AERO SB | HSD 2.0,- smax:13.10 bullet and 71 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Accurate High Country.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 56,565 psi | 89% | 3415 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,927 psi | 89% | 3455 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 54,520 psi | 85% | 3510 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 90% | 55,680 psi | 87% | 3514 fps | 97.6% |
| ADI AR 2209 | <<locked>> | 88% | 54,636 psi | 86% | 3455 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 92% | 56,594 psi | 89% | 3524 fps | 98.7% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,969 psi | 86% | 3481 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,327 psi | 77% | 3419 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,795 psi | 86% | 3448 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,433 psi | 85% | 3461 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 54,172 psi | 85% | 3442 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,753 psi | 89% | 3517 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 92% | 54,418 psi | 85% | 3428 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 54,491 psi | 85% | 3494 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 55,100 psi | 86% | 3517 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 55,927 psi | 88% | 3501 fps | 99.3% |
| Bofors RP30 | <<locked>> | 98% | 54,114 psi | 85% | 3484 fps | 98.7% |
| Bofors RP5 | <<locked>> | 92% | 56,753 psi | 89% | 3517 fps | 99.4% |
| Bofors RP7 | <<locked>> | 82% | 55,013 psi | 86% | 3396 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 98% | 56,594 psi | 89% | 3510 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 82% | 54,955 psi | 86% | 3451 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 82% | 57,363 psi | 90% | 3474 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 90% | 56,144 psi | 88% | 3451 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,955 psi | 86% | 3432 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,650 psi | 86% | 3373 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 57,130 psi | 90% | 3642 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,883 psi | 88% | 3484 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,057 psi | 58% | 2277 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,290 psi | 90% | 3442 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,521 psi | 89% | 3425 fps | 99.8% |
| IMR 4831 | <<locked>> | 86% | 57,493 psi | 90% | 3445 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,710 psi | 89% | 3435 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 92% | 54,534 psi | 85% | 3497 fps | 98.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,614 psi | 70% | 3297 fps | 96.4% |
| Lovex S065 | <<locked>> | 84% | 57,261 psi | 90% | 3419 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,666 psi | 87% | 3415 fps | 99.9% |
| Lovex S071 | <<locked>> | 96% | 54,172 psi | 85% | 3373 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,839 psi | 86% | 3435 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 45,150 psi | 71% | 3330 fps | 98.6% |
| Norma MRP | <<locked>> | 90% | 56,913 psi | 89% | 3540 fps | 99.9% |
| Norma URP | <<locked>> | 84% | 55,419 psi | 87% | 3438 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 55,535 psi | 87% | 3517 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 84% | 54,592 psi | 86% | 3435 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 54,244 psi | 85% | 3438 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,942 psi | 59% | 2329 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,450 psi | 90% | 3478 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,202 psi | 88% | 3510 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 54,331 psi | 85% | 3556 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 53,708 psi | 84% | 3494 fps | 97.5% |
| Rottweil R 904 | <<locked>> | 88% | 55,492 psi | 87% | 3422 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 90% | 57,464 psi | 90% | 3494 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 82% | 55,013 psi | 86% | 3396 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,261 psi | 90% | 3419 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,666 psi | 87% | 3415 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,507 psi | 89% | 3366 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 57,043 psi | 89% | 3491 fps | 99.5% |
| Somchem S361 | <<locked>> | 88% | 57,305 psi | 90% | 3409 fps | 98.3% |
| Somchem S365 | <<locked>> | 86% | 56,420 psi | 88% | 3438 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 54,128 psi | 85% | 3392 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 82% | 57,334 psi | 90% | 3356 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,072 psi | 89% | 3428 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 54,085 psi | 85% | 3376 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 84% | 56,347 psi | 88% | 3428 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,231 psi | 88% | 3458 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 56,536 psi | 89% | 3537 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 96% | 56,884 psi | 89% | 3510 fps | 98.6% |
| Vihtavuori N568 | <<locked>> | 98% | 54,331 psi | 85% | 3504 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,000 psi | 89% | 3369 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,129 psi | 86% | 3455 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 94% | 57,711 psi | 90% | 3579 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 54,114 psi | 85% | 3386 fps | 99.1% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 36,912 psi | 58% | 3005 fps | 97.3% |
| Accurate 4350 | <<locked>> | 80% | 49,516 psi | 78% | 3323 fps | 100% |
| Accurate High Country | 97.8 gr | 82% | 43,685 psi | 68% | 3278 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 86% | 47,964 psi | 75% | 3360 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 41,263 psi | 65% | 3169 fps | 96.1% |
| ADI AR 2213 | <<locked>> | 84% | 42,482 psi | 67% | 3225 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 92% | 41,249 psi | 65% | 3176 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 90% | 34,809 psi | 55% | 3048 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,698 psi | 65% | 3169 fps | 96.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,485 psi | 74% | 3333 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,278 psi | 65% | 3159 fps | 96.1% |
| Alliant Reloder-22 | <<locked>> | 82% | 39,885 psi | 63% | 3156 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,679 psi | 56% | 3041 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,835 psi | 48% | 2923 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,001 psi | 63% | 3205 fps | 99.2% |
| Bofors RP15 | <<locked>> | 84% | 39,639 psi | 62% | 3146 fps | 95.5% |
| Bofors RP30 | <<locked>> | 90% | 40,669 psi | 64% | 3189 fps | 95.2% |
| Bofors RP5 | <<locked>> | 82% | 39,885 psi | 63% | 3156 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 51,605 psi | 81% | 3330 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 88% | 39,320 psi | 62% | 3133 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 51,184 psi | 80% | 3379 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 53,650 psi | 84% | 3406 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 45,353 psi | 71% | 3235 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 84% | 44,512 psi | 70% | 3215 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,599 psi | 70% | 3192 fps | 100% |
| Hodgdon Retumbo | 98.9 gr | 86% | 37,217 psi | 58% | 3169 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 51,808 psi | 81% | 3409 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,688 psi | 43% | 2047 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,079 psi | 74% | 3245 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,084 psi | 83% | 3363 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 46,949 psi | 74% | 3258 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 43,598 psi | 68% | 3163 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 86% | 43,859 psi | 69% | 3268 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 98% | 41,553 psi | 65% | 3225 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 50,430 psi | 79% | 3297 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 48,834 psi | 77% | 3284 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 31,459 psi | 49% | 2851 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 47,456 psi | 74% | 3287 fps | 97.7% |
| Norma 217 | <<locked>> | 94% | 36,129 psi | 57% | 3104 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 39,102 psi | 61% | 3163 fps | 96.9% |
| Norma URP | <<locked>> | 80% | 48,399 psi | 76% | 3307 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 40,828 psi | 64% | 3202 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 47,369 psi | 74% | 3297 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 36,550 psi | 57% | 3051 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,297 psi | 44% | 2093 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,748 psi | 78% | 3343 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,225 psi | 76% | 3363 fps | 100% |
| ReloadSwiss RS 76 | 103.3 gr | 84% | 34,011 psi | 53% | 3054 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 45,701 psi | 72% | 3327 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 42,424 psi | 66% | 3146 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 80% | 40,582 psi | 64% | 3143 fps | 96% |
| Rottweil R 907 | <<locked>> | 80% | 51,605 psi | 81% | 3330 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,430 psi | 79% | 3297 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 48,834 psi | 77% | 3284 fps | 99.3% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,458 psi | 78% | 3235 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,263 psi | 63% | 3136 fps | 95.9% |
| Somchem S361 | <<locked>> | 82% | 46,586 psi | 73% | 3199 fps | 95.9% |
| Somchem S365 | <<locked>> | 80% | 45,658 psi | 72% | 3251 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,133 psi | 64% | 3123 fps | 97.1% |
| Vihtavuori N150 | <<locked>> | 80% | 53,751 psi | 84% | 3301 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,893 psi | 78% | 3301 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 38,145 psi | 60% | 3031 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 49,168 psi | 77% | 3297 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,871 psi | 62% | 3133 fps | 99.5% |
| Vihtavuori N560 | <<locked>> | 84% | 45,397 psi | 71% | 3304 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 88% | 42,685 psi | 67% | 3212 fps | 95% |
| Vihtavuori N568 | <<locked>> | 96% | 50,357 psi | 79% | 3422 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,414 psi | 77% | 3245 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,329 psi | 80% | 3383 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,358 psi | 51% | 3051 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 82% | 40,567 psi | 64% | 3104 fps | 96% |
Recommended = one of the top powders for this cartridge and bullet combination.
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 | 135gr | AERO SB | HSD 2.0,- smax:13.10. Hodgdon Retumbo delivers the highest muzzle velocity at 3,642 fps; across all powders the maximum-charge window runs from 2,277 fps to 3,642 fps. ADI AR 2217 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 135.0 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 2225, Hodgdon TrailBoss 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. Hodgdon Retumbo, ReloadSwiss RS 76, Accurate High Country rank at the top here: for .30-378 Weath. Mag. with the .308 | 135gr | AERO SB | HSD 2.0,- smax:13.10 they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.