Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 130gr | Barnes X BT bullet and 60 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>> | 88% | 54,578 psi | 86% | 3412 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 55,376 psi | 87% | 3566 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 88% | 56,289 psi | 88% | 3560 fps | 97.5% |
| ADI AR 2209 | <<locked>> | 86% | 54,607 psi | 86% | 3494 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 90% | 56,695 psi | 89% | 3563 fps | 98.5% |
| ADI AR 2217 | <<locked>> | 98% | 55,390 psi | 87% | 3520 fps | 98.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,114 psi | 85% | 3550 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 54,549 psi | 85% | 3504 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 54,520 psi | 85% | 3481 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,421 psi | 90% | 3566 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,274 psi | 87% | 3478 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,201 psi | 87% | 3543 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,173 psi | 88% | 3573 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 57,740 psi | 90% | 3612 fps | 96.1% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,435 psi | 90% | 3497 fps | 96.2% |
| Bofors RP15 | <<locked>> | 92% | 56,666 psi | 89% | 3553 fps | 99.2% |
| Bofors RP30 | <<locked>> | 96% | 55,477 psi | 87% | 3543 fps | 98.8% |
| Bofors RP5 | <<locked>> | 90% | 57,421 psi | 90% | 3566 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 96% | 56,855 psi | 89% | 3553 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 88% | 56,202 psi | 88% | 3488 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,114 psi | 86% | 3468 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,259 psi | 87% | 3419 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 54,070 psi | 85% | 3622 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,565 psi | 59% | 2326 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,145 psi | 90% | 3474 fps | 99.7% |
| IMR 4831 | <<locked>> | 82% | 54,650 psi | 86% | 3435 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,594 psi | 89% | 3468 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 90% | 54,940 psi | 86% | 3540 fps | 98.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,763 psi | 78% | 3445 fps | 97.6% |
| Lovex S070 | <<locked>> | 82% | 56,318 psi | 88% | 3458 fps | 99.9% |
| Lovex S071 | <<locked>> | 94% | 56,101 psi | 88% | 3438 fps | 100% |
| Norma 204 | <<locked>> | 82% | 54,737 psi | 86% | 3471 fps | 98.8% |
| Norma 217ᴾ | <<locked>> | 100% | 50,633 psi | 79% | 3481 fps | 99.4% |
| Norma MRP | <<locked>> | 88% | 57,464 psi | 90% | 3589 fps | 99.9% |
| Norma URP | <<locked>> | 82% | 55,941 psi | 88% | 3481 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,028 psi | 88% | 3563 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 82% | 54,853 psi | 86% | 3478 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 92% | 55,071 psi | 86% | 3488 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,551 psi | 60% | 2379 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,202 psi | 88% | 3550 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,201 psi | 87% | 3612 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 54,998 psi | 86% | 3553 fps | 97.6% |
| Rottweil R 904 | <<locked>> | 86% | 55,593 psi | 87% | 3458 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 86% | 54,273 psi | 85% | 3471 fps | 99% |
| Shooters World SW4350 | <<locked>> | 82% | 56,318 psi | 88% | 3458 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,768 psi | 89% | 3402 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,464 psi | 90% | 3533 fps | 99.4% |
| Somchem S361 | <<locked>> | 86% | 57,348 psi | 90% | 3442 fps | 98.1% |
| Somchem S365 | <<locked>> | 84% | 57,188 psi | 90% | 3488 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,085 psi | 86% | 3445 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 82% | 57,348 psi | 90% | 3468 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 54,665 psi | 86% | 3415 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 82% | 56,884 psi | 89% | 3474 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,696 psi | 90% | 3517 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,840 psi | 89% | 3579 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 92% | 54,462 psi | 85% | 3497 fps | 98% |
| Vihtavuori N568 | <<locked>> | 96% | 55,317 psi | 87% | 3556 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,927 psi | 89% | 3406 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 54,549 psi | 85% | 3570 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 54,578 psi | 86% | 3428 fps | 99% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 42,134 psi | 66% | 3159 fps | 98.6% |
| Accurate High Country | <<locked>> | 80% | 45,107 psi | 71% | 3346 fps | 95.9% |
| Accurate MAGPRO | <<locked>> | 84% | 49,153 psi | 77% | 3415 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 44,875 psi | 70% | 3287 fps | 97% |
| ADI AR 2213 | <<locked>> | 82% | 43,337 psi | 68% | 3274 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 90% | 42,511 psi | 67% | 3238 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 86% | 34,432 psi | 54% | 3064 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,184 psi | 80% | 3442 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,049 psi | 71% | 3281 fps | 97% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,321 psi | 65% | 3222 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,074 psi | 63% | 3179 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,882 psi | 55% | 3081 fps | 97.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,092 psi | 71% | 3360 fps | 99.8% |
| Alliant Reloder-33 | <<locked>> | 98% | 53,621 psi | 84% | 3533 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,070 psi | 85% | 3432 fps | 95.4% |
| Bofors RP15 | <<locked>> | 82% | 41,162 psi | 65% | 3215 fps | 95.8% |
| Bofors RP30 | <<locked>> | 88% | 42,612 psi | 67% | 3268 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 41,321 psi | 65% | 3222 fps | 96% |
| Hodgdon H1000 | <<locked>> | 86% | 40,509 psi | 63% | 3192 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 82% | 46,021 psi | 72% | 3281 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 82% | 45,295 psi | 71% | 3264 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,646 psi | 76% | 3304 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 84% | 38,841 psi | 61% | 3248 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,268 psi | 44% | 2093 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,517 psi | 79% | 3350 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 51,314 psi | 80% | 3373 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,251 psi | 69% | 3209 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 84% | 44,904 psi | 70% | 3327 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 96% | 43,656 psi | 68% | 3307 fps | 95.9% |
| Lovex S070 | <<locked>> | 80% | 52,997 psi | 83% | 3399 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 36,637 psi | 57% | 3022 fps | 97.1% |
| Norma 204 | <<locked>> | 80% | 51,213 psi | 80% | 3402 fps | 98.3% |
| Norma 217 | <<locked>> | 90% | 36,187 psi | 57% | 3136 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 43,613 psi | 68% | 3307 fps | 98% |
| Norma URP | <<locked>> | 80% | 52,504 psi | 82% | 3422 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 41,989 psi | 66% | 3261 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 51,343 psi | 80% | 3412 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 82% | 38,276 psi | 60% | 3127 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,979 psi | 45% | 2139 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,446 psi | 82% | 3481 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 82% | 36,042 psi | 56% | 3146 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 47,442 psi | 74% | 3399 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 45,977 psi | 72% | 3261 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 80% | 44,730 psi | 70% | 3271 fps | 97.1% |
| Shooters World SW4350 | <<locked>> | 80% | 52,997 psi | 83% | 3399 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,417 psi | 84% | 3343 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,367 psi | 70% | 3268 fps | 97% |
| Somchem S361 | <<locked>> | 80% | 47,253 psi | 74% | 3241 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 50,198 psi | 79% | 3373 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,484 psi | 71% | 3251 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 80% | 53,824 psi | 84% | 3409 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 39,682 psi | 62% | 3100 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 80% | 53,388 psi | 84% | 3412 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,875 psi | 70% | 3278 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 46,441 psi | 73% | 3360 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 86% | 44,744 psi | 70% | 3291 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 92% | 48,225 psi | 76% | 3409 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,214 psi | 83% | 3346 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,391 psi | 59% | 3228 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,742 psi | 65% | 3159 fps | 96.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 60 powders for .30-378 Weath. Mag. loaded with the .308 | 130gr | Barnes X BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,622 fps; across all powders the maximum-charge window runs from 2,326 fps to 3,622 fps. ADI AR 2225 gives the best case fill at 100 %, and 60 of the 60 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-33, 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.