Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 132gr | Brenneke TIG nature 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% | 55,666 psi | 87% | 3428 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,130 psi | 88% | 3474 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 57,725 psi | 90% | 3602 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 90% | 54,781 psi | 86% | 3527 fps | 97.3% |
| ADI AR 2209 | <<locked>> | 88% | 53,867 psi | 84% | 3474 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 92% | 55,869 psi | 88% | 3543 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,027 psi | 85% | 3491 fps | 98.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,602 psi | 76% | 3435 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,522 psi | 90% | 3550 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,116 psi | 90% | 3527 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,014 psi | 88% | 3533 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,435 psi | 90% | 3510 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,522 psi | 90% | 3576 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,099 psi | 85% | 3530 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,261 psi | 90% | 3491 fps | 96.2% |
| Bofors RP15 | <<locked>> | 94% | 55,027 psi | 86% | 3514 fps | 99.1% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3570 fps | 99.1% |
| Bofors RP5 | <<locked>> | 92% | 56,014 psi | 88% | 3533 fps | 99.3% |
| Bofors RP7 | <<locked>> | 82% | 54,375 psi | 85% | 3415 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 98% | 55,796 psi | 87% | 3527 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 82% | 54,172 psi | 85% | 3468 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 82% | 56,623 psi | 89% | 3491 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 90% | 55,332 psi | 87% | 3468 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,143 psi | 85% | 3445 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,580 psi | 90% | 3451 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,275 psi | 88% | 3658 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 82% | 55,187 psi | 86% | 3504 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,057 psi | 58% | 2303 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,565 psi | 89% | 3461 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,883 psi | 88% | 3445 fps | 99.8% |
| IMR 4831 | <<locked>> | 86% | 56,710 psi | 89% | 3465 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,130 psi | 88% | 3455 fps | 98% |
| IMR 7828 SSC | <<locked>> | 92% | 53,795 psi | 84% | 3510 fps | 98.1% |
| Lovex S065 | <<locked>> | 84% | 56,724 psi | 89% | 3445 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 54,969 psi | 86% | 3432 fps | 99.8% |
| Lovex S071 | <<locked>> | 98% | 57,043 psi | 89% | 3451 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,070 psi | 85% | 3451 fps | 98.8% |
| Norma 217ᴾ | <<locked>> | 100% | 44,179 psi | 69% | 3340 fps | 98.3% |
| Norma MRP | <<locked>> | 90% | 55,999 psi | 88% | 3560 fps | 99.8% |
| Norma URP | <<locked>> | 84% | 54,650 psi | 86% | 3458 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,679 psi | 86% | 3537 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 86% | 57,522 psi | 90% | 3520 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 53,403 psi | 84% | 3451 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,811 psi | 59% | 2352 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,579 psi | 89% | 3497 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,288 psi | 87% | 3527 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 53,301 psi | 84% | 3570 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3593 fps | 98.1% |
| Rottweil R 904 | <<locked>> | 88% | 54,737 psi | 86% | 3438 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 90% | 56,594 psi | 89% | 3514 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 82% | 54,375 psi | 85% | 3415 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,724 psi | 89% | 3445 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 54,969 psi | 86% | 3432 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 55,956 psi | 88% | 3386 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,173 psi | 88% | 3507 fps | 99.3% |
| Somchem S361 | <<locked>> | 88% | 56,579 psi | 89% | 3422 fps | 98% |
| Somchem S365 | <<locked>> | 86% | 55,535 psi | 87% | 3458 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,058 psi | 89% | 3478 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 82% | 56,623 psi | 89% | 3379 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,289 psi | 88% | 3448 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,058 psi | 89% | 3455 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 84% | 55,593 psi | 87% | 3448 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,390 psi | 87% | 3478 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,637 psi | 87% | 3550 fps | 98% |
| Vihtavuori N565 | <<locked>> | 96% | 56,057 psi | 88% | 3524 fps | 98.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,653 psi | 90% | 3596 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,391 psi | 88% | 3392 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,346 psi | 85% | 3471 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,463 psi | 88% | 3596 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,377 psi | 90% | 3474 fps | 99.3% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 36,303 psi | 57% | 3018 fps | 97% |
| Accurate 4350 | <<locked>> | 80% | 48,762 psi | 76% | 3340 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 42,931 psi | 67% | 3287 fps | 95.2% |
| Accurate MAGPRO | <<locked>> | 86% | 47,137 psi | 74% | 3366 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 40,654 psi | 64% | 3182 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 86% | 44,933 psi | 70% | 3314 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 94% | 43,584 psi | 68% | 3264 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 90% | 34,214 psi | 54% | 3054 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,760 psi | 73% | 3350 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,698 psi | 64% | 3176 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 82% | 39,247 psi | 62% | 3166 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,041 psi | 55% | 3054 fps | 99.4% |
| Alliant Reloder-25 | <<locked>> | 82% | 32,460 psi | 51% | 3002 fps | 96.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,189 psi | 61% | 3215 fps | 99% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 53,693 psi | 84% | 3419 fps | 95.3% |
| Bofors RP15 | <<locked>> | 84% | 38,972 psi | 61% | 3159 fps | 95% |
| Bofors RP30 | <<locked>> | 92% | 42,917 psi | 67% | 3274 fps | 95.8% |
| Bofors RP5 | <<locked>> | 82% | 39,247 psi | 62% | 3166 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 50,981 psi | 80% | 3350 fps | 99% |
| Hodgdon H1000 | <<locked>> | 90% | 41,568 psi | 65% | 3219 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 50,618 psi | 79% | 3402 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 52,953 psi | 83% | 3422 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 84% | 44,672 psi | 70% | 3248 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 86% | 47,079 psi | 74% | 3301 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,932 psi | 69% | 3209 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 39,291 psi | 62% | 3261 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 50,981 psi | 80% | 3425 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,702 psi | 43% | 2070 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,470 psi | 73% | 3261 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,475 psi | 82% | 3383 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 46,267 psi | 73% | 3274 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 46,006 psi | 72% | 3248 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 86% | 43,294 psi | 68% | 3284 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 49,806 psi | 78% | 3317 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 48,225 psi | 76% | 3301 fps | 99.1% |
| Lovex S071 | <<locked>> | 82% | 33,199 psi | 52% | 2930 fps | 95.7% |
| Norma 204 | <<locked>> | 80% | 46,934 psi | 74% | 3307 fps | 97.4% |
| Norma 217 | <<locked>> | 94% | 35,491 psi | 56% | 3110 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 38,551 psi | 60% | 3176 fps | 96.5% |
| Norma URP | <<locked>> | 80% | 47,703 psi | 75% | 3323 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 43,352 psi | 68% | 3294 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 46,804 psi | 73% | 3317 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 84% | 35,868 psi | 56% | 3061 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,311 psi | 44% | 2116 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,965 psi | 77% | 3360 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,442 psi | 74% | 3379 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 36,085 psi | 57% | 3146 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 48,602 psi | 76% | 3422 fps | 96% |
| Rottweil R 904 | <<locked>> | 82% | 44,715 psi | 70% | 3228 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 80% | 39,958 psi | 63% | 3153 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 50,981 psi | 80% | 3350 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,806 psi | 78% | 3317 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 48,225 psi | 76% | 3301 fps | 99.1% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,849 psi | 77% | 3255 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,624 psi | 62% | 3150 fps | 95.5% |
| Somchem S361 | <<locked>> | 82% | 45,934 psi | 72% | 3212 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 44,918 psi | 70% | 3268 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,509 psi | 63% | 3133 fps | 96.7% |
| Vihtavuori N150 | <<locked>> | 80% | 53,084 psi | 83% | 3320 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,226 psi | 77% | 3320 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 37,681 psi | 59% | 3051 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 48,617 psi | 76% | 3320 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 39,204 psi | 61% | 3146 fps | 99.3% |
| Vihtavuori N560 | <<locked>> | 84% | 44,672 psi | 70% | 3317 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 90% | 45,150 psi | 71% | 3297 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 96% | 49,559 psi | 78% | 3435 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,718 psi | 76% | 3264 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,763 psi | 80% | 3402 fps | 99.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 31,676 psi | 50% | 3061 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 82% | 39,943 psi | 63% | 3114 fps | 95.6% |
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 | 132gr | Brenneke TIG nature. Hodgdon Retumbo delivers the highest muzzle velocity at 3,658 fps; across all powders the maximum-charge window runs from 2,303 fps to 3,658 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 132.0 gr projectile in 0.308" calls for a 1:11.5 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-33, 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.