Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | Reichenberg HDB Universal bullet and 64 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and IMR 7828 SSC.
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>> | 90% | 57,276 psi | 90% | 3291 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,522 psi | 90% | 3320 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 56,594 psi | 89% | 3402 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 86% | 54,998 psi | 86% | 3330 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 90% | 57,363 psi | 90% | 3406 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 98% | 55,854 psi | 88% | 3369 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,520 psi | 85% | 3389 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,303 psi | 87% | 3327 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,042 psi | 86% | 3327 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 54,708 psi | 86% | 3317 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,624 psi | 90% | 3399 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,405 psi | 87% | 3301 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,782 psi | 87% | 3373 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,159 psi | 88% | 3392 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 53,882 psi | 84% | 3383 fps | 96.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,520 psi | 85% | 3291 fps | 96.9% |
| Bofors RP15 | <<locked>> | 92% | 56,797 psi | 89% | 3383 fps | 99.8% |
| Bofors RP30 | <<locked>> | 96% | 55,521 psi | 87% | 3376 fps | 99.5% |
| Bofors RP5 | <<locked>> | 90% | 57,624 psi | 90% | 3399 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 96% | 57,508 psi | 90% | 3399 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 88% | 56,434 psi | 88% | 3330 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,434 psi | 87% | 3314 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,143 psi | 86% | 3238 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 54,766 psi | 86% | 3461 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,376 psi | 59% | 2178 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,522 psi | 90% | 3310 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 54,230 psi | 85% | 3251 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,884 psi | 89% | 3310 fps | 99% |
| IMR 7828 SSC | <<locked>> | 90% | 55,477 psi | 87% | 3383 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,705 psi | 78% | 3284 fps | 98.7% |
| Lovex S065 | <<locked>> | 82% | 57,334 psi | 90% | 3284 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,898 psi | 88% | 3284 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 55,100 psi | 86% | 3258 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,042 psi | 86% | 3307 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 50,473 psi | 79% | 3310 fps | 99.9% |
| Norma MRP | <<locked>> | 86% | 53,780 psi | 84% | 3346 fps | 100% |
| Norma URP | <<locked>> | 82% | 55,854 psi | 88% | 3304 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,826 psi | 89% | 3409 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 82% | 54,984 psi | 86% | 3307 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,274 psi | 87% | 3323 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,334 psi | 60% | 2231 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,768 psi | 89% | 3376 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,825 psi | 87% | 3448 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,143 psi | 86% | 3396 fps | 98.6% |
| Rottweil R 904 | <<locked>> | 86% | 55,724 psi | 87% | 3297 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 86% | 54,201 psi | 85% | 3304 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,334 psi | 90% | 3284 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,898 psi | 88% | 3284 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,478 psi | 89% | 3232 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,638 psi | 90% | 3366 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 57,319 psi | 90% | 3284 fps | 99% |
| Somchem S365 | <<locked>> | 84% | 57,232 psi | 90% | 3307 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 54,679 psi | 86% | 3274 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 82% | 57,392 psi | 90% | 3294 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 54,694 psi | 86% | 3258 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 82% | 56,594 psi | 89% | 3294 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,174 psi | 90% | 3330 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 57,319 psi | 90% | 3419 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 92% | 53,983 psi | 85% | 3330 fps | 98.9% |
| Vihtavuori N568 | <<locked>> | 96% | 55,753 psi | 87% | 3402 fps | 98.3% |
| Vihtavuori N570 | <<locked>> | 98% | 57,000 psi | 89% | 3468 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,261 psi | 90% | 3235 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,056 psi | 86% | 3386 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 54,650 psi | 86% | 3268 fps | 99.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 40,321 psi | 63% | 2969 fps | 99% |
| Accurate 4350 | <<locked>> | 80% | 53,621 psi | 84% | 3258 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 42,076 psi | 66% | 3100 fps | 95% |
| ADI AR 2209 | <<locked>> | 80% | 44,730 psi | 70% | 3127 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 80% | 40,001 psi | 63% | 3041 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 88% | 39,175 psi | 61% | 3015 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 84% | 30,908 psi | 48% | 2818 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,078 psi | 71% | 3123 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,459 psi | 81% | 3264 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,672 psi | 70% | 3117 fps | 98.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,596 psi | 64% | 3051 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,247 psi | 62% | 2999 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,794 psi | 53% | 2904 fps | 98.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,454 psi | 70% | 3176 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 49,763 psi | 78% | 3297 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 47,877 psi | 75% | 3156 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 37,652 psi | 59% | 2976 fps | 95.9% |
| Bofors RP30 | <<locked>> | 86% | 38,914 psi | 61% | 3025 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 40,596 psi | 64% | 3051 fps | 97.1% |
| Hodgdon H1000 | <<locked>> | 84% | 37,130 psi | 58% | 2963 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 80% | 42,641 psi | 67% | 3054 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,872 psi | 66% | 3035 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,269 psi | 76% | 3123 fps | 100% |
| Hodgdon Retumbo | 94.7 gr | 82% | 35,447 psi | 56% | 3002 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,021 psi | 44% | 1959 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,430 psi | 79% | 3186 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 50,662 psi | 79% | 3192 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,859 psi | 69% | 3051 fps | 96.4% |
| IMR 7828 SSC | 92.3 gr | 80% | 38,653 psi | 61% | 3018 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 94% | 40,016 psi | 63% | 3068 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 53,882 psi | 84% | 3225 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,330 psi | 82% | 3219 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 34,490 psi | 54% | 2825 fps | 97.5% |
| Norma 204 | <<locked>> | 80% | 51,271 psi | 80% | 3238 fps | 99.2% |
| Norma 217 | <<locked>> | 88% | 32,416 psi | 51% | 2877 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 43,076 psi | 68% | 3133 fps | 98.9% |
| Norma URP | <<locked>> | 80% | 52,199 psi | 82% | 3241 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,537 psi | 60% | 3025 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 51,271 psi | 80% | 3241 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,519 psi | 54% | 2881 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,703 psi | 45% | 2005 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,750 psi | 83% | 3307 fps | 100% |
| ReloadSwiss RS 76 | 98.9 gr | 80% | 32,256 psi | 51% | 2890 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 43,410 psi | 68% | 3153 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 45,643 psi | 72% | 3100 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 80% | 44,106 psi | 69% | 3104 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,882 psi | 84% | 3225 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,330 psi | 82% | 3219 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,823 psi | 83% | 3169 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,772 psi | 69% | 3097 fps | 98% |
| Somchem S361 | <<locked>> | 80% | 46,673 psi | 73% | 3084 fps | 97% |
| Somchem S365 | <<locked>> | 80% | 49,763 psi | 78% | 3186 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,527 psi | 70% | 3077 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 80% | 53,664 psi | 84% | 3235 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,754 psi | 61% | 2933 fps | 97.2% |
| Vihtavuori N550 | <<locked>> | 80% | 53,011 psi | 83% | 3232 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,584 psi | 68% | 3087 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,902 psi | 67% | 3123 fps | 96% |
| Vihtavuori N565 | <<locked>> | 84% | 40,683 psi | 64% | 3045 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 90% | 44,454 psi | 70% | 3173 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 96% | 52,866 psi | 83% | 3389 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,301 psi | 84% | 3176 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,883 psi | 58% | 3035 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,017 psi | 64% | 2992 fps | 97.3% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 64 powders for .30-378 Weath. Mag. loaded with the .308 | 150gr | Reichenberg HDB Universal. Vihtavuori N570 delivers the highest muzzle velocity at 3,468 fps; across all powders the maximum-charge window runs from 2,178 fps to 3,468 fps. ADI AR 2225 gives the best case fill at 100 %, and 64 of the 64 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 150.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Hodgdon TrailBoss, IMR 8133 Enduron 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. Hodgdon Retumbo, ReloadSwiss RS 76, IMR 7828 SSC rank at the top here: for .30-378 Weath. Mag. with the .308 | 150gr | Reichenberg HDB Universal they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.