Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 90gr | Impala LWHV LS bullet and 59 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.
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>> | 94% | 54,549 psi | 85% | 3839 fps | 98.6% |
| Accurate 4350 | <<locked>> | 86% | 55,042 psi | 86% | 3921 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 82% | 55,172 psi | 86% | 3894 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 92% | 55,317 psi | 87% | 3940 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,782 psi | 89% | 3930 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,578 psi | 86% | 3980 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,231 psi | 88% | 4003 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,085 psi | 86% | 3921 fps | 96.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,435 psi | 90% | 4003 fps | 97.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,549 psi | 85% | 3930 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,331 psi | 85% | 3963 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 92% | 55,376 psi | 87% | 4012 fps | 99.7% |
| Bofors RP15 | <<locked>> | 98% | 56,275 psi | 88% | 3973 fps | 96.8% |
| Bofors RP5 | <<locked>> | 96% | 57,435 psi | 90% | 4003 fps | 97.2% |
| Bofors RP7 | <<locked>> | 86% | 57,058 psi | 89% | 3914 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 56,231 psi | 88% | 3960 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 84% | 54,926 psi | 86% | 3904 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,564 psi | 87% | 3891 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,200 psi | 83% | 4009 fps | 97.1% |
| Hodgdon Superformance | <<locked>> | 86% | 57,130 psi | 90% | 3983 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,738 psi | 58% | 2713 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,969 psi | 86% | 3871 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,694 psi | 86% | 3871 fps | 97.7% |
| IMR 4831 | <<locked>> | 88% | 55,187 psi | 86% | 3901 fps | 99.6% |
| Lovex S065 | <<locked>> | 86% | 55,695 psi | 87% | 3881 fps | 98.9% |
| Lovex S070 | <<locked>> | 88% | 57,464 psi | 90% | 3927 fps | 98.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,651 psi | 87% | 3862 fps | 98.8% |
| Norma 204 | <<locked>> | 88% | 56,028 psi | 88% | 3924 fps | 96.4% |
| Norma MRP | <<locked>> | 94% | 57,305 psi | 90% | 4029 fps | 98.4% |
| Norma URP | <<locked>> | 88% | 56,507 psi | 89% | 3957 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 88% | 55,579 psi | 87% | 3937 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 98% | 54,810 psi | 86% | 3898 fps | 97.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,536 psi | 59% | 2772 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,740 psi | 90% | 3927 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,332 psi | 87% | 4003 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,868 psi | 86% | 3924 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,797 psi | 89% | 4019 fps | 99.6% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,897 psi | 86% | 4012 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 82% | 54,897 psi | 86% | 3885 fps | 100% |
| Rottweil R 905 | <<locked>> | 92% | 54,592 psi | 86% | 3907 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 86% | 57,058 psi | 89% | 3914 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,695 psi | 87% | 3881 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 88% | 57,464 psi | 90% | 3927 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,970 psi | 88% | 3934 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,696 psi | 90% | 3802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,288 psi | 87% | 3809 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,740 psi | 90% | 3973 fps | 97.2% |
| Somchem S355 | <<locked>> | 82% | 54,404 psi | 85% | 3875 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 57,000 psi | 89% | 3967 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,622 psi | 87% | 3881 fps | 97.5% |
| Vihtavuori N150 | <<locked>> | 84% | 55,767 psi | 87% | 3839 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,723 psi | 86% | 3878 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 96% | 55,056 psi | 86% | 3842 fps | 97.2% |
| Vihtavuori N550 | <<locked>> | 86% | 54,346 psi | 85% | 3878 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 94% | 57,101 psi | 89% | 3970 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,694 psi | 86% | 3819 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,362 psi | 88% | 3963 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 98% | 56,115 psi | 88% | 4078 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,521 psi | 87% | 3862 fps | 96.6% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 86% | 41,684 psi | 65% | 3553 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 44,831 psi | 70% | 3694 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 80% | 51,895 psi | 81% | 3829 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 90% | 51,706 psi | 81% | 3862 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,214 psi | 83% | 3865 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,032 psi | 66% | 3684 fps | 97.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,689 psi | 76% | 3852 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 51,576 psi | 81% | 3848 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 50,096 psi | 79% | 3845 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,155 psi | 50% | 3360 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 90% | 39,088 psi | 61% | 3579 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 82% | 38,000 psi | 60% | 3589 fps | 95.4% |
| Bofors RP15 | <<locked>> | 96% | 52,823 psi | 83% | 3898 fps | 95.9% |
| Bofors RP5 | <<locked>> | 92% | 50,096 psi | 79% | 3845 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 47,239 psi | 74% | 3698 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 45,977 psi | 72% | 3730 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 82% | 51,532 psi | 81% | 3832 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,856 psi | 62% | 3547 fps | 98.2% |
| Hodgdon Retumbo | <<locked>> | 98% | 49,734 psi | 78% | 3924 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 45,629 psi | 72% | 3730 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,528 psi | 43% | 2454 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 48,385 psi | 76% | 3727 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,225 psi | 76% | 3730 fps | 96.1% |
| IMR 4831 | <<locked>> | 80% | 42,395 psi | 66% | 3612 fps | 97.3% |
| Lovex S065 | <<locked>> | 80% | 46,340 psi | 73% | 3675 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 44,744 psi | 70% | 3648 fps | 95.5% |
| Lovex S071 | <<locked>> | 90% | 40,451 psi | 63% | 3520 fps | 95% |
| Norma 204 | <<locked>> | 86% | 52,475 psi | 82% | 3852 fps | 95.5% |
| Norma MRP | <<locked>> | 88% | 46,253 psi | 72% | 3786 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 43,497 psi | 68% | 3668 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 80% | 42,496 psi | 67% | 3638 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 94% | 47,282 psi | 74% | 3730 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,065 psi | 44% | 2510 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 54,070 psi | 85% | 3855 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,503 psi | 81% | 3930 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,585 psi | 70% | 3698 fps | 97.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,612 psi | 67% | 3691 fps | 96.8% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 44,063 psi | 69% | 3737 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 51,474 psi | 81% | 3816 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 90% | 51,053 psi | 80% | 3832 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 47,239 psi | 74% | 3698 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,340 psi | 73% | 3675 fps | 97.1% |
| Shooters World SW4350 | <<locked>> | 80% | 44,744 psi | 70% | 3648 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,388 psi | 82% | 3865 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,952 psi | 80% | 3688 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,571 psi | 71% | 3596 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 50,618 psi | 79% | 3825 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 51,140 psi | 80% | 3809 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 40,466 psi | 63% | 3622 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 48,718 psi | 76% | 3737 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 48,936 psi | 77% | 3707 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,875 psi | 70% | 3665 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 92% | 48,182 psi | 76% | 3698 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 44,759 psi | 70% | 3668 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 36,027 psi | 56% | 3471 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,295 psi | 69% | 3609 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 46,093 psi | 72% | 3734 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 82% | 31,140 psi | 49% | 3406 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 92% | 51,721 psi | 81% | 3783 fps | 95.7% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 79 powders for .30-378 Weath. Mag. loaded with the .308 | 90gr | Impala LWHV LS. Winchester StaBALL HD delivers the highest muzzle velocity at 4,078 fps; across all powders the maximum-charge window runs from 2,713 fps to 4,078 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 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. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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, Accurate MAGPRO, ADI AR 2217, Baschieri & Pellagri 109 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.