Load Specifications
Load data in caliber .30-378 Weath. Mag. with .310 | 123gr | Speer Gold Dot 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% | 56,057 psi | 88% | 3517 fps | 99.9% |
| Accurate 4350 | <<locked>> | 84% | 56,463 psi | 88% | 3566 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 57,711 psi | 90% | 3684 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 90% | 54,926 psi | 86% | 3609 fps | 96.7% |
| ADI AR 2209 | <<locked>> | 90% | 57,638 psi | 90% | 3625 fps | 99% |
| ADI AR 2213 | <<locked>> | 92% | 55,767 psi | 87% | 3619 fps | 97.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,114 psi | 85% | 3566 fps | 98.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,733 psi | 76% | 3510 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,056 psi | 85% | 3547 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 57,276 psi | 90% | 3632 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,072 psi | 89% | 3606 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,086 psi | 88% | 3619 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,348 psi | 90% | 3593 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,421 psi | 90% | 3655 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,157 psi | 85% | 3612 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 55,085 psi | 86% | 3596 fps | 98.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,406 psi | 90% | 3648 fps | 98.7% |
| Bofors RP5 | <<locked>> | 92% | 56,086 psi | 88% | 3619 fps | 99% |
| Bofors RP7 | <<locked>> | 82% | 54,520 psi | 85% | 3501 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 98% | 55,695 psi | 87% | 3599 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 82% | 54,288 psi | 85% | 3553 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 82% | 56,521 psi | 89% | 3570 fps | 99% |
| Hodgdon H4831 | <<locked>> | 90% | 55,376 psi | 87% | 3547 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,273 psi | 85% | 3527 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 57,595 psi | 90% | 3537 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,115 psi | 88% | 3734 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 82% | 55,114 psi | 86% | 3583 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,101 psi | 58% | 2382 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,521 psi | 89% | 3540 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,883 psi | 88% | 3527 fps | 99.6% |
| IMR 4831 | <<locked>> | 86% | 56,826 psi | 89% | 3553 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,115 psi | 88% | 3530 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 94% | 57,682 psi | 90% | 3665 fps | 98.3% |
| Lovex S065 | <<locked>> | 84% | 56,826 psi | 89% | 3527 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,056 psi | 86% | 3517 fps | 99.6% |
| Lovex S071 | <<locked>> | 98% | 57,406 psi | 90% | 3540 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,027 psi | 85% | 3530 fps | 98.4% |
| Norma 217ᴾ | <<locked>> | 100% | 44,512 psi | 70% | 3415 fps | 97.9% |
| Norma MRP | <<locked>> | 90% | 55,999 psi | 88% | 3635 fps | 99.7% |
| Norma URP | <<locked>> | 84% | 54,679 psi | 86% | 3543 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,505 psi | 85% | 3609 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 86% | 57,566 psi | 90% | 3606 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 53,388 psi | 84% | 3527 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,840 psi | 59% | 2431 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 56,782 psi | 89% | 3583 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,201 psi | 87% | 3612 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 53,388 psi | 84% | 3645 fps | 99.9% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 57,406 psi | 90% | 3668 fps | 97.6% |
| Rottweil R 904 | <<locked>> | 88% | 54,679 psi | 86% | 3517 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 90% | 56,608 psi | 89% | 3593 fps | 99% |
| Rottweil R 907 | <<locked>> | 82% | 54,520 psi | 85% | 3501 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,826 psi | 89% | 3527 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,056 psi | 86% | 3517 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,014 psi | 88% | 3468 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,188 psi | 88% | 3586 fps | 98.9% |
| Somchem S361 | <<locked>> | 88% | 56,594 psi | 89% | 3501 fps | 97.5% |
| Somchem S365 | <<locked>> | 86% | 55,637 psi | 87% | 3547 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,305 psi | 90% | 3563 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 82% | 56,768 psi | 89% | 3468 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,362 psi | 88% | 3533 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,101 psi | 89% | 3537 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 84% | 55,869 psi | 88% | 3533 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,651 psi | 87% | 3566 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,608 psi | 87% | 3625 fps | 97.5% |
| Vihtavuori N565 | <<locked>> | 96% | 56,202 psi | 88% | 3602 fps | 97.9% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,740 psi | 90% | 3671 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,362 psi | 88% | 3474 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,433 psi | 85% | 3556 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,449 psi | 88% | 3681 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,566 psi | 90% | 3553 fps | 99.1% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 36,782 psi | 58% | 3097 fps | 96.5% |
| Accurate 4350 | <<locked>> | 80% | 49,023 psi | 77% | 3425 fps | 99.9% |
| Accurate High Country | <<locked>> | 84% | 46,485 psi | 73% | 3448 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 88% | 51,010 psi | 80% | 3527 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 82% | 43,758 psi | 69% | 3333 fps | 96% |
| ADI AR 2213 | <<locked>> | 86% | 45,092 psi | 71% | 3389 fps | 95.1% |
| ADI AR 2217 | <<locked>> | 94% | 43,772 psi | 69% | 3337 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 92% | 37,014 psi | 58% | 3202 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,162 psi | 65% | 3258 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,746 psi | 73% | 3432 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,785 psi | 64% | 3248 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 84% | 42,366 psi | 66% | 3317 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,317 psi | 55% | 3133 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 32,895 psi | 52% | 3081 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,552 psi | 62% | 3301 fps | 98.6% |
| Bofors RP15 | <<locked>> | 86% | 42,061 psi | 66% | 3307 fps | 95.4% |
| Bofors RP30 | <<locked>> | 92% | 43,207 psi | 68% | 3350 fps | 95.2% |
| Bofors RP5 | <<locked>> | 84% | 42,366 psi | 66% | 3317 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 51,097 psi | 80% | 3432 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 90% | 41,843 psi | 66% | 3294 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 50,676 psi | 79% | 3481 fps | 99% |
| Hodgdon H4350 | <<locked>> | 80% | 52,968 psi | 83% | 3501 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 86% | 48,095 psi | 75% | 3396 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 86% | 47,239 psi | 74% | 3376 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,092 psi | 69% | 3291 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 39,537 psi | 62% | 3333 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 51,053 psi | 80% | 3504 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,746 psi | 43% | 2142 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,499 psi | 73% | 3340 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,431 psi | 82% | 3461 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 46,456 psi | 73% | 3356 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 84% | 46,195 psi | 72% | 3327 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 88% | 46,615 psi | 73% | 3435 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 50,038 psi | 78% | 3402 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 48,399 psi | 76% | 3383 fps | 98.8% |
| Lovex S071 | <<locked>> | 82% | 33,794 psi | 53% | 3012 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 46,992 psi | 74% | 3383 fps | 96.8% |
| Norma 217 | <<locked>> | 96% | 38,537 psi | 60% | 3264 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 38,711 psi | 61% | 3251 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 47,819 psi | 75% | 3406 fps | 99.8% |
| Ramshot Grand | <<locked>> | 86% | 43,468 psi | 68% | 3366 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 46,905 psi | 74% | 3396 fps | 99% |
| Ramshot Magnum | <<locked>> | 86% | 39,030 psi | 61% | 3212 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,355 psi | 44% | 2192 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,240 psi | 77% | 3445 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,485 psi | 74% | 3461 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 36,463 psi | 57% | 3219 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 48,849 psi | 77% | 3494 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 82% | 44,875 psi | 70% | 3310 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 80% | 40,118 psi | 63% | 3228 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 51,097 psi | 80% | 3432 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,038 psi | 78% | 3402 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 48,399 psi | 76% | 3383 fps | 98.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,994 psi | 77% | 3333 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 42,656 psi | 67% | 3297 fps | 95.9% |
| Somchem S361 | <<locked>> | 84% | 49,356 psi | 77% | 3356 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 45,049 psi | 71% | 3353 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,872 psi | 64% | 3215 fps | 96.3% |
| Vihtavuori N150 | <<locked>> | 80% | 53,214 psi | 83% | 3409 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,240 psi | 77% | 3402 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 40,611 psi | 64% | 3192 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 48,849 psi | 77% | 3402 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 39,581 psi | 62% | 3232 fps | 99.1% |
| Vihtavuori N560 | <<locked>> | 86% | 48,153 psi | 75% | 3471 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 90% | 45,498 psi | 71% | 3376 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 96% | 49,719 psi | 78% | 3507 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,907 psi | 77% | 3350 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 50,821 psi | 80% | 3484 fps | 99% |
| Winchester StaBALL HD | <<locked>> | 80% | 31,879 psi | 50% | 3140 fps | 99.3% |
| Winchester Supreme 780 | <<locked>> | 82% | 40,205 psi | 63% | 3192 fps | 95% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 70 powders for .30-378 Weath. Mag. loaded with the .310 | 123gr | Speer Gold Dot. Hodgdon Retumbo delivers the highest muzzle velocity at 3,734 fps; across all powders the maximum-charge window runs from 2,382 fps to 3,734 fps. ADI AR 2217 gives the best case fill at 100 %, and 70 of the 70 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 123.0 gr projectile in 0.31" calls for a 1:16.5 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.