Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | Steinbock Precision Jagd bullet and 65 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 80 and Vihtavuori N568.
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% | 57,305 psi | 90% | 3287 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,551 psi | 90% | 3317 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 55,143 psi | 86% | 3389 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 88% | 56,101 psi | 88% | 3392 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 86% | 54,824 psi | 86% | 3323 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 90% | 56,971 psi | 89% | 3399 fps | 99.3% |
| ADI AR 2217 | <<locked>> | 98% | 55,332 psi | 87% | 3356 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,954 psi | 85% | 3379 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,042 psi | 86% | 3320 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 82% | 54,795 psi | 86% | 3320 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 54,447 psi | 85% | 3310 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,334 psi | 90% | 3392 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,230 psi | 87% | 3297 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,288 psi | 87% | 3366 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 55,811 psi | 87% | 3386 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 57,638 psi | 90% | 3451 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,725 psi | 90% | 3343 fps | 97.4% |
| Bofors RP15 | <<locked>> | 92% | 56,507 psi | 89% | 3376 fps | 99.7% |
| Bofors RP30 | <<locked>> | 96% | 55,129 psi | 86% | 3369 fps | 99.4% |
| Bofors RP5 | <<locked>> | 90% | 57,334 psi | 90% | 3392 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 96% | 57,116 psi | 90% | 3389 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 88% | 56,115 psi | 88% | 3320 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,114 psi | 86% | 3304 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,071 psi | 86% | 3235 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 54,114 psi | 85% | 3448 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,449 psi | 59% | 2172 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,159 psi | 90% | 3301 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 54,128 psi | 85% | 3248 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,695 psi | 89% | 3304 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 90% | 55,114 psi | 86% | 3373 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,255 psi | 77% | 3278 fps | 98.5% |
| Lovex S065 | <<locked>> | 82% | 57,334 psi | 90% | 3281 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,825 psi | 87% | 3278 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 55,100 psi | 86% | 3255 fps | 100% |
| Norma 204 | <<locked>> | 82% | 54,737 psi | 86% | 3297 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 50,154 psi | 79% | 3307 fps | 99.8% |
| Norma MRP | <<locked>> | 88% | 57,377 psi | 90% | 3412 fps | 100% |
| Norma URP | <<locked>> | 82% | 55,651 psi | 87% | 3294 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,289 psi | 88% | 3399 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 82% | 54,708 psi | 86% | 3301 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 54,824 psi | 86% | 3317 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,319 psi | 60% | 2221 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,405 psi | 88% | 3369 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,201 psi | 87% | 3442 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 54,636 psi | 86% | 3389 fps | 98.5% |
| Rottweil R 904 | <<locked>> | 86% | 55,434 psi | 87% | 3287 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 86% | 53,969 psi | 85% | 3301 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,334 psi | 90% | 3281 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,825 psi | 87% | 3278 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,405 psi | 88% | 3225 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,421 psi | 90% | 3360 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 57,145 psi | 90% | 3274 fps | 98.9% |
| Somchem S365 | <<locked>> | 84% | 56,942 psi | 89% | 3297 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 54,491 psi | 85% | 3268 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 82% | 57,217 psi | 90% | 3284 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 54,462 psi | 85% | 3248 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 82% | 56,550 psi | 89% | 3291 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,087 psi | 89% | 3330 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,869 psi | 89% | 3406 fps | 99% |
| Vihtavuori N565 | <<locked>> | 94% | 57,696 psi | 90% | 3392 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 96% | 55,259 psi | 87% | 3392 fps | 98.1% |
| Vihtavuori N570 | <<locked>> | 98% | 56,289 psi | 88% | 3455 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,898 psi | 89% | 3225 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 54,723 psi | 86% | 3386 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 54,418 psi | 85% | 3261 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% | 40,611 psi | 64% | 2972 fps | 99.1% |
| Accurate 4350 | <<locked>> | 80% | 53,621 psi | 84% | 3255 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 44,541 psi | 70% | 3169 fps | 97% |
| Accurate MAGPRO | <<locked>> | 82% | 45,266 psi | 71% | 3173 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 44,657 psi | 70% | 3123 fps | 98% |
| ADI AR 2213 | <<locked>> | 80% | 39,943 psi | 63% | 3041 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 88% | 39,204 psi | 61% | 3012 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 84% | 31,111 psi | 49% | 2822 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 44,947 psi | 70% | 3117 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,213 psi | 80% | 3261 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,527 psi | 70% | 3110 fps | 98% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,596 psi | 64% | 3051 fps | 97% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,305 psi | 62% | 2999 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,982 psi | 53% | 2910 fps | 98.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,396 psi | 70% | 3176 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 49,327 psi | 77% | 3291 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 50,763 psi | 80% | 3212 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 37,782 psi | 59% | 2976 fps | 95.9% |
| Bofors RP30 | <<locked>> | 86% | 38,972 psi | 61% | 3025 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 40,596 psi | 64% | 3051 fps | 97% |
| Hodgdon H1000 | <<locked>> | 84% | 37,246 psi | 58% | 2963 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 80% | 42,598 psi | 67% | 3048 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,814 psi | 66% | 3031 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,196 psi | 76% | 3120 fps | 100% |
| Hodgdon Retumbo | 92.5 gr | 82% | 35,549 psi | 56% | 3005 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,021 psi | 44% | 1949 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,386 psi | 79% | 3179 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 50,720 psi | 79% | 3189 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,874 psi | 69% | 3048 fps | 96.3% |
| IMR 7828 SSC | <<locked>> | 82% | 41,510 psi | 65% | 3091 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 94% | 40,045 psi | 63% | 3068 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 53,882 psi | 84% | 3222 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,402 psi | 82% | 3219 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 34,969 psi | 55% | 2831 fps | 97.6% |
| Norma 204 | <<locked>> | 80% | 51,126 psi | 80% | 3232 fps | 99.1% |
| Norma 217 | <<locked>> | 88% | 32,634 psi | 51% | 2890 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 43,120 psi | 68% | 3133 fps | 98.8% |
| Norma URP | <<locked>> | 80% | 52,112 psi | 82% | 3235 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,551 psi | 60% | 3025 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 51,169 psi | 80% | 3235 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,606 psi | 54% | 2884 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,732 psi | 45% | 1995 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,402 psi | 82% | 3301 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 32,460 psi | 51% | 2897 fps | 95.7% |
| ReloadSwiss RS 80 | 109.5 gr | 90% | 43,236 psi | 68% | 3150 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 45,629 psi | 72% | 3094 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 80% | 44,150 psi | 69% | 3100 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,882 psi | 84% | 3222 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,402 psi | 82% | 3219 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,721 psi | 83% | 3163 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,801 psi | 69% | 3094 fps | 97.9% |
| Somchem S361 | <<locked>> | 80% | 46,615 psi | 73% | 3077 fps | 96.9% |
| Somchem S365 | <<locked>> | 80% | 49,734 psi | 78% | 3182 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,614 psi | 70% | 3077 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 80% | 53,461 psi | 84% | 3225 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,812 psi | 61% | 2930 fps | 97.1% |
| Vihtavuori N550 | <<locked>> | 80% | 52,924 psi | 83% | 3228 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,801 psi | 69% | 3091 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,917 psi | 67% | 3123 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 84% | 40,828 psi | 64% | 3048 fps | 95.5% |
| Vihtavuori N568 | 105.9 gr | 90% | 44,309 psi | 69% | 3169 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 96% | 52,373 psi | 82% | 3376 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,084 psi | 83% | 3169 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,869 psi | 58% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,046 psi | 64% | 2992 fps | 97.2% |
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 65 powders for .30-378 Weath. Mag. loaded with the .308 | 150gr | Steinbock Precision Jagd. Vihtavuori N570 delivers the highest muzzle velocity at 3,455 fps; across all powders the maximum-charge window runs from 2,172 fps to 3,455 fps. ADI AR 2225 gives the best case fill at 100 %, and 65 of the 65 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 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-33, Hodgdon TrailBoss 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 80, Vihtavuori N568 rank at the top here: for .30-378 Weath. Mag. with the .308 | 150gr | Steinbock Precision Jagd 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.