Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 115gr | Lehigh Defense Controlled Chaos bullet and 71 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% | 56,739 psi | 89% | 3609 fps | 99.8% |
| Accurate 4350 | <<locked>> | 86% | 57,319 psi | 90% | 3668 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 54,331 psi | 85% | 3701 fps | 97.1% |
| Accurate MAGPRO | <<locked>> | 92% | 55,535 psi | 87% | 3698 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 82% | 57,479 psi | 90% | 3635 fps | 100% |
| ADI AR 2209 | <<locked>> | 90% | 54,462 psi | 85% | 3648 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 94% | 56,391 psi | 88% | 3714 fps | 97.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,995 psi | 80% | 3573 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,759 psi | 72% | 3514 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 86% | 54,273 psi | 85% | 3675 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 55,506 psi | 87% | 3684 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 54,186 psi | 85% | 3632 fps | 98.1% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,492 psi | 89% | 3711 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 53,983 psi | 85% | 3625 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 57,638 psi | 90% | 3750 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 54,679 psi | 86% | 3714 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 55,666 psi | 87% | 3688 fps | 98.3% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,563 psi | 84% | 3658 fps | 97.5% |
| Bofors RP5 | <<locked>> | 94% | 56,492 psi | 89% | 3711 fps | 98.6% |
| Bofors RP7 | <<locked>> | 84% | 55,506 psi | 87% | 3602 fps | 98.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 56,492 psi | 89% | 3691 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 84% | 55,158 psi | 86% | 3655 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 84% | 57,595 psi | 90% | 3675 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 92% | 56,231 psi | 88% | 3642 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 55,042 psi | 86% | 3615 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 54,723 psi | 86% | 3583 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 56,492 psi | 89% | 3825 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 84% | 56,057 psi | 88% | 3684 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,811 psi | 58% | 2441 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 57,479 psi | 90% | 3642 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,072 psi | 89% | 3635 fps | 99.4% |
| IMR 4831 | <<locked>> | 88% | 57,580 psi | 90% | 3652 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,116 psi | 90% | 3629 fps | 97.1% |
| IMR 7828 SSC | <<locked>> | 94% | 54,186 psi | 85% | 3681 fps | 97.1% |
| Lovex S065 | <<locked>> | 84% | 54,230 psi | 85% | 3566 fps | 99.7% |
| Lovex S070 | <<locked>> | 86% | 56,101 psi | 88% | 3619 fps | 99.4% |
| Lovex S071 | <<locked>> | 98% | 54,070 psi | 85% | 3560 fps | 99.6% |
| Norma 204 | <<locked>> | 86% | 54,984 psi | 86% | 3632 fps | 98% |
| Norma MRP | <<locked>> | 92% | 56,652 psi | 89% | 3737 fps | 99.5% |
| Norma URP | <<locked>> | 86% | 55,550 psi | 87% | 3645 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 55,172 psi | 86% | 3701 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 86% | 54,592 psi | 86% | 3635 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 96% | 54,056 psi | 85% | 3622 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,637 psi | 59% | 2500 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 57,522 psi | 90% | 3681 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 56,043 psi | 88% | 3714 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 53,954 psi | 85% | 3737 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 82% | 56,927 psi | 89% | 3615 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 55,608 psi | 87% | 3612 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 92% | 57,377 psi | 90% | 3691 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 84% | 55,506 psi | 87% | 3602 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 54,230 psi | 85% | 3566 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 86% | 56,101 psi | 88% | 3619 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 56,318 psi | 88% | 3474 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,290 psi | 90% | 3570 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 56,956 psi | 89% | 3684 fps | 98.6% |
| Somchem S355 | <<locked>> | 82% | 56,521 psi | 89% | 3612 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,682 psi | 90% | 3596 fps | 97.1% |
| Somchem S365 | <<locked>> | 88% | 56,159 psi | 88% | 3648 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,230 psi | 85% | 3586 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 82% | 54,259 psi | 85% | 3514 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 57,363 psi | 90% | 3635 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 54,099 psi | 85% | 3560 fps | 98.6% |
| Vihtavuori N550 | <<locked>> | 86% | 56,652 psi | 89% | 3638 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 55,956 psi | 88% | 3658 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 56,289 psi | 88% | 3720 fps | 97% |
| Vihtavuori N565 | <<locked>> | 98% | 56,695 psi | 89% | 3691 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,479 psi | 90% | 3576 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,303 psi | 87% | 3655 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 96% | 56,347 psi | 88% | 3773 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,389 psi | 85% | 3576 fps | 98.1% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 82% | 37,115 psi | 58% | 3179 fps | 95.9% |
| Accurate 4350 | <<locked>> | 80% | 46,282 psi | 73% | 3455 fps | 99.4% |
| Accurate High Country | <<locked>> | 86% | 46,876 psi | 73% | 3537 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 90% | 51,547 psi | 81% | 3615 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 53,998 psi | 85% | 3570 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 44,266 psi | 69% | 3425 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 90% | 48,907 psi | 77% | 3553 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 98% | 47,529 psi | 74% | 3497 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 94% | 37,246 psi | 58% | 3278 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 80% | 44,121 psi | 69% | 3461 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 51,445 psi | 81% | 3612 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 44,179 psi | 69% | 3412 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 86% | 42,786 psi | 67% | 3409 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,083 psi | 52% | 3146 fps | 98% |
| Alliant Reloder-25 | <<locked>> | 86% | 35,404 psi | 55% | 3232 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,695 psi | 57% | 3301 fps | 97.2% |
| Bofors RP15 | <<locked>> | 90% | 45,368 psi | 71% | 3468 fps | 95.8% |
| Bofors RP30 | <<locked>> | 96% | 46,499 psi | 73% | 3507 fps | 95.6% |
| Bofors RP5 | <<locked>> | 86% | 42,786 psi | 67% | 3409 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 48,834 psi | 77% | 3465 fps | 97.7% |
| Hodgdon H1000 | <<locked>> | 94% | 45,397 psi | 71% | 3451 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 47,950 psi | 75% | 3507 fps | 98% |
| Hodgdon H4350 | <<locked>> | 80% | 50,372 psi | 79% | 3530 fps | 97.4% |
| Hodgdon H4831 | <<locked>> | 90% | 52,373 psi | 82% | 3566 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 90% | 51,271 psi | 80% | 3543 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,640 psi | 65% | 3320 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 92% | 42,569 psi | 67% | 3491 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 48,109 psi | 75% | 3524 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,528 psi | 43% | 2201 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 44,266 psi | 69% | 3366 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 50,198 psi | 79% | 3497 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 43,961 psi | 69% | 3383 fps | 99.2% |
| IMR 4955 Enduron | <<locked>> | 88% | 50,038 psi | 78% | 3488 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 90% | 47,094 psi | 74% | 3524 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 47,732 psi | 75% | 3435 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 46,108 psi | 72% | 3412 fps | 97.8% |
| Lovex S071 | <<locked>> | 86% | 36,187 psi | 57% | 3156 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 44,454 psi | 70% | 3402 fps | 95.3% |
| Norma MRP | <<locked>> | 82% | 39,088 psi | 61% | 3340 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 45,324 psi | 71% | 3435 fps | 99.3% |
| Ramshot Grand | <<locked>> | 90% | 47,239 psi | 74% | 3533 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 44,309 psi | 69% | 3419 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 88% | 39,494 psi | 62% | 3294 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,094 psi | 44% | 2251 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 46,412 psi | 73% | 3468 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 44,759 psi | 70% | 3484 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 39,697 psi | 62% | 3386 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 53,243 psi | 83% | 3553 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 48,776 psi | 76% | 3471 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 84% | 43,526 psi | 68% | 3396 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 48,834 psi | 77% | 3465 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,732 psi | 75% | 3435 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 80% | 46,108 psi | 72% | 3412 fps | 97.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,026 psi | 83% | 3419 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,833 psi | 73% | 3366 fps | 97.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 43,163 psi | 68% | 3389 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 52,939 psi | 83% | 3547 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 50,328 psi | 79% | 3451 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 42,322 psi | 66% | 3383 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 41,365 psi | 65% | 3301 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 50,749 psi | 80% | 3451 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,731 psi | 73% | 3435 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 41,118 psi | 64% | 3281 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 46,282 psi | 73% | 3432 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 37,115 psi | 58% | 3245 fps | 98% |
| Vihtavuori N560 | <<locked>> | 88% | 48,660 psi | 76% | 3563 fps | 95% |
| Vihtavuori N565 | <<locked>> | 94% | 49,153 psi | 77% | 3537 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,325 psi | 73% | 3383 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,109 psi | 75% | 3510 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 29,530 psi | 46% | 3127 fps | 97.6% |
| Winchester Supreme 780 | <<locked>> | 86% | 43,729 psi | 69% | 3350 fps | 95.4% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 78 powders for .30-378 Weath. Mag. loaded with the .308 | 115gr | Lehigh Defense Controlled Chaos. Hodgdon Retumbo delivers the highest muzzle velocity at 3,825 fps; across all powders the maximum-charge window runs from 2,441 fps to 3,825 fps. ADI AR 2217 gives the best case fill at 100 %, and 78 of the 78 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 115.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. 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, Baschieri & Pellagri 109, IMR 8133 Enduron, Vihtavuori N170 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.