Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 130gr | Barnes TTSX BT 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 Vihtavuori N560.
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% | 54,940 psi | 86% | 3432 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,593 psi | 87% | 3481 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 56,956 psi | 89% | 3606 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 90% | 54,041 psi | 85% | 3530 fps | 96.9% |
| ADI AR 2209 | <<locked>> | 90% | 57,072 psi | 89% | 3547 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 92% | 55,143 psi | 86% | 3543 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,316 psi | 84% | 3494 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,921 psi | 75% | 3435 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 57,159 psi | 90% | 3543 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 86% | 56,811 psi | 89% | 3553 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 56,478 psi | 89% | 3530 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 92% | 55,288 psi | 87% | 3540 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 94% | 56,681 psi | 89% | 3514 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 56,695 psi | 89% | 3579 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 57,725 psi | 90% | 3612 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 56,855 psi | 89% | 3494 fps | 95.9% |
| Bofors RP15 | <<locked>> | 94% | 54,346 psi | 85% | 3517 fps | 98.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 56,463 psi | 88% | 3573 fps | 98.8% |
| Bofors RP5 | <<locked>> | 92% | 55,288 psi | 87% | 3540 fps | 99.1% |
| Bofors RP7 | <<locked>> | 84% | 57,522 psi | 90% | 3488 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 98% | 55,056 psi | 86% | 3527 fps | 99% |
| Hodgdon H414 | <<locked>> | 84% | 57,479 psi | 90% | 3547 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 82% | 55,999 psi | 88% | 3497 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 90% | 54,665 psi | 86% | 3474 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 57,551 psi | 90% | 3524 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,072 psi | 89% | 3465 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 55,448 psi | 87% | 3661 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 82% | 54,476 psi | 85% | 3507 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,927 psi | 58% | 2313 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 55,970 psi | 88% | 3465 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,477 psi | 87% | 3455 fps | 99.7% |
| IMR 4831 | <<locked>> | 86% | 56,028 psi | 88% | 3471 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 55,535 psi | 87% | 3458 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 94% | 57,072 psi | 89% | 3589 fps | 98.5% |
| Lovex S065 | <<locked>> | 84% | 56,144 psi | 88% | 3451 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 54,360 psi | 85% | 3438 fps | 99.7% |
| Lovex S071 | <<locked>> | 98% | 56,333 psi | 88% | 3455 fps | 100% |
| Norma 204 | <<locked>> | 86% | 57,435 psi | 90% | 3530 fps | 99.1% |
| Norma 217ᴾ | <<locked>> | 100% | 43,424 psi | 68% | 3337 fps | 97.9% |
| Norma MRP | <<locked>> | 90% | 55,230 psi | 87% | 3560 fps | 99.7% |
| Norma URP | <<locked>> | 84% | 53,998 psi | 85% | 3461 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 53,867 psi | 84% | 3537 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 86% | 57,029 psi | 89% | 3530 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 56,971 psi | 89% | 3530 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,797 psi | 59% | 2369 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,043 psi | 88% | 3504 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 54,563 psi | 86% | 3533 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 56,913 psi | 89% | 3655 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,391 psi | 88% | 3589 fps | 97.8% |
| Rottweil R 904 | <<locked>> | 88% | 54,128 psi | 85% | 3442 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 90% | 56,072 psi | 88% | 3520 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 84% | 57,522 psi | 90% | 3488 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,144 psi | 88% | 3451 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 54,360 psi | 85% | 3438 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,405 psi | 87% | 3392 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 55,651 psi | 87% | 3514 fps | 99.1% |
| Somchem S361 | <<locked>> | 88% | 55,956 psi | 88% | 3425 fps | 97.7% |
| Somchem S365 | <<locked>> | 86% | 54,853 psi | 86% | 3468 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 56,579 psi | 89% | 3484 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 82% | 56,217 psi | 88% | 3389 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 55,840 psi | 88% | 3455 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 56,362 psi | 88% | 3461 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 84% | 55,143 psi | 86% | 3458 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 54,650 psi | 86% | 3481 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 54,911 psi | 86% | 3550 fps | 97.7% |
| Vihtavuori N565 | <<locked>> | 96% | 55,347 psi | 87% | 3527 fps | 98% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 56,811 psi | 89% | 3596 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 55,753 psi | 87% | 3399 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 57,638 psi | 90% | 3547 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 94% | 55,521 psi | 87% | 3599 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 56,710 psi | 89% | 3478 fps | 99.2% |
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% | 35,781 psi | 56% | 3015 fps | 96.6% |
| Accurate 4350 | <<locked>> | 80% | 48,109 psi | 75% | 3343 fps | 99.9% |
| Accurate High Country | <<locked>> | 84% | 45,745 psi | 72% | 3369 fps | 95.9% |
| Accurate MAGPRO | <<locked>> | 88% | 50,212 psi | 79% | 3451 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 40,132 psi | 63% | 3186 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 86% | 44,353 psi | 70% | 3314 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 94% | 43,047 psi | 67% | 3264 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 92% | 36,187 psi | 57% | 3130 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 40,553 psi | 64% | 3186 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,151 psi | 72% | 3353 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,176 psi | 63% | 3176 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 84% | 41,582 psi | 65% | 3241 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,534 psi | 54% | 3054 fps | 99.2% |
| Alliant Reloder-25 | <<locked>> | 82% | 32,097 psi | 50% | 3005 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,667 psi | 61% | 3215 fps | 98.7% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 53,156 psi | 83% | 3422 fps | 95% |
| Bofors RP15 | <<locked>> | 86% | 41,278 psi | 65% | 3232 fps | 95.6% |
| Bofors RP30 | <<locked>> | 92% | 42,264 psi | 66% | 3271 fps | 95.3% |
| Bofors RP5 | <<locked>> | 84% | 41,582 psi | 65% | 3241 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 50,430 psi | 79% | 3353 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 90% | 41,031 psi | 64% | 3219 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 49,995 psi | 78% | 3402 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 52,402 psi | 82% | 3428 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 86% | 47,500 psi | 74% | 3327 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 86% | 46,499 psi | 73% | 3301 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,366 psi | 68% | 3212 fps | 100% |
| Hodgdon Retumbo | 101.2 gr | 88% | 38,725 psi | 61% | 3258 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 50,328 psi | 79% | 3425 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,586 psi | 43% | 2080 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,934 psi | 72% | 3268 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,938 psi | 81% | 3386 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 45,701 psi | 72% | 3278 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 84% | 45,629 psi | 72% | 3251 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 88% | 45,919 psi | 72% | 3360 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 49,298 psi | 77% | 3323 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 47,674 psi | 75% | 3307 fps | 98.9% |
| Lovex S071 | <<locked>> | 82% | 32,721 psi | 51% | 2930 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 46,369 psi | 73% | 3310 fps | 97.1% |
| Norma 217 | <<locked>> | 96% | 37,478 psi | 59% | 3182 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 37,956 psi | 59% | 3173 fps | 96.1% |
| Norma URP | <<locked>> | 80% | 47,152 psi | 74% | 3330 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 42,714 psi | 67% | 3294 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 46,238 psi | 72% | 3320 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 86% | 38,232 psi | 60% | 3136 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,181 psi | 44% | 2129 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,486 psi | 76% | 3366 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,920 psi | 74% | 3386 fps | 99.8% |
| ReloadSwiss RS 76 | 105.8 gr | 86% | 35,549 psi | 56% | 3140 fps | 95.5% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 47,805 psi | 75% | 3419 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 82% | 44,338 psi | 69% | 3235 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 39,450 psi | 62% | 3156 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 50,430 psi | 79% | 3353 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,298 psi | 77% | 3323 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 47,674 psi | 75% | 3307 fps | 98.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,370 psi | 76% | 3258 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,117 psi | 61% | 3150 fps | 95% |
| Somchem S361 | <<locked>> | 82% | 45,426 psi | 71% | 3215 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 44,295 psi | 69% | 3274 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,001 psi | 63% | 3136 fps | 96.4% |
| Vihtavuori N150 | <<locked>> | 80% | 52,533 psi | 82% | 3330 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 48,631 psi | 76% | 3323 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 82% | 37,173 psi | 58% | 3048 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 48,080 psi | 75% | 3323 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 38,638 psi | 61% | 3146 fps | 99.1% |
| Vihtavuori N560 | 102.6 gr | 86% | 47,442 psi | 74% | 3396 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 90% | 44,541 psi | 70% | 3301 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 96% | 48,820 psi | 77% | 3435 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,298 psi | 76% | 3271 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,140 psi | 79% | 3409 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 31,024 psi | 49% | 3058 fps | 99.3% |
| Winchester Supreme 780 | <<locked>> | 82% | 39,421 psi | 62% | 3117 fps | 95.2% |
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 | 130gr | Barnes TTSX BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,661 fps; across all powders the maximum-charge window runs from 2,313 fps to 3,661 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 130.0 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, Bofors RP30 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, Vihtavuori N560 rank at the top here: for .30-378 Weath. Mag. with the .308 | 130gr | Barnes TTSX BT 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.