Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | Barnes TSX FN FB bullet and 62 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 Ramshot Grand.
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>> | 88% | 53,940 psi | 85% | 3238 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 55,941 psi | 88% | 3406 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 88% | 57,087 psi | 89% | 3412 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 86% | 55,521 psi | 87% | 3340 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 88% | 53,940 psi | 85% | 3343 fps | 99% |
| ADI AR 2217 | <<locked>> | 98% | 56,507 psi | 89% | 3379 fps | 99.6% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 53,142 psi | 83% | 3409 fps | 96.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 55,158 psi | 86% | 3399 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,796 psi | 87% | 3337 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,637 psi | 87% | 3333 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,187 psi | 86% | 3327 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 54,302 psi | 85% | 3340 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,956 psi | 88% | 3307 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 56,289 psi | 88% | 3383 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,753 psi | 89% | 3399 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 54,650 psi | 86% | 3396 fps | 96.8% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 55,071 psi | 86% | 3301 fps | 97.1% |
| Bofors RP15 | <<locked>> | 92% | 57,276 psi | 90% | 3392 fps | 99.8% |
| Bofors RP30 | <<locked>> | 96% | 56,014 psi | 88% | 3386 fps | 99.6% |
| Bofors RP5 | <<locked>> | 88% | 54,302 psi | 85% | 3340 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 94% | 54,099 psi | 85% | 3337 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 88% | 56,942 psi | 89% | 3340 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,912 psi | 88% | 3320 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,724 psi | 87% | 3248 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 55,303 psi | 87% | 3468 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,405 psi | 59% | 2185 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 54,230 psi | 85% | 3255 fps | 99.9% |
| IMR 4831 | <<locked>> | 82% | 54,607 psi | 86% | 3258 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,348 psi | 90% | 3320 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 90% | 56,028 psi | 88% | 3389 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,140 psi | 79% | 3287 fps | 98.7% |
| Lovex S070 | <<locked>> | 82% | 56,260 psi | 88% | 3291 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 55,608 psi | 87% | 3264 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,405 psi | 87% | 3317 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 51,140 psi | 80% | 3320 fps | 99.9% |
| Norma MRP | <<locked>> | 86% | 54,302 psi | 85% | 3356 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,246 psi | 88% | 3310 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,406 psi | 90% | 3415 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 82% | 55,317 psi | 87% | 3314 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,898 psi | 88% | 3333 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,348 psi | 60% | 2234 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,290 psi | 90% | 3383 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 56,507 psi | 89% | 3455 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,927 psi | 88% | 3406 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 86% | 56,231 psi | 88% | 3307 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 86% | 54,723 psi | 86% | 3314 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 82% | 56,260 psi | 88% | 3291 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,782 psi | 89% | 3238 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 54,331 psi | 85% | 3307 fps | 99.7% |
| Somchem S361 | <<locked>> | 84% | 54,027 psi | 85% | 3225 fps | 98.5% |
| Somchem S365 | <<locked>> | 84% | 57,667 psi | 90% | 3310 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,027 psi | 86% | 3278 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 90% | 55,158 psi | 86% | 3264 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 57,116 psi | 90% | 3301 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 57,725 psi | 90% | 3340 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 53,853 psi | 84% | 3353 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 92% | 54,607 psi | 86% | 3340 fps | 99% |
| Vihtavuori N568 | <<locked>> | 96% | 56,376 psi | 88% | 3412 fps | 98.4% |
| Vihtavuori N570 | <<locked>> | 98% | 57,624 psi | 90% | 3478 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,740 psi | 90% | 3241 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,869 psi | 88% | 3396 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,114 psi | 86% | 3274 fps | 99.7% |
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% | 40,698 psi | 64% | 2976 fps | 99.1% |
| Accurate High Country | <<locked>> | 80% | 44,904 psi | 70% | 3179 fps | 97.2% |
| Accurate MAGPRO | <<locked>> | 80% | 42,554 psi | 67% | 3110 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 45,092 psi | 71% | 3133 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 80% | 40,350 psi | 63% | 3054 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 88% | 39,581 psi | 62% | 3022 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 98% | 49,182 psi | 77% | 3317 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 84% | 31,270 psi | 49% | 2828 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,440 psi | 71% | 3133 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,895 psi | 81% | 3274 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,005 psi | 71% | 3123 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,930 psi | 64% | 3058 fps | 97.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,624 psi | 62% | 3005 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,142 psi | 54% | 2913 fps | 98.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,991 psi | 71% | 3186 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 50,502 psi | 79% | 3314 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 48,211 psi | 76% | 3166 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 38,029 psi | 60% | 2982 fps | 96.1% |
| Bofors RP30 | <<locked>> | 86% | 39,363 psi | 62% | 3035 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 40,930 psi | 64% | 3058 fps | 97.2% |
| Hodgdon H1000 | <<locked>> | 84% | 37,536 psi | 59% | 2972 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 80% | 42,975 psi | 67% | 3058 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,192 psi | 66% | 3041 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,675 psi | 76% | 3133 fps | 100% |
| Hodgdon Retumbo | 95.4 gr | 82% | 35,752 psi | 56% | 3012 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,992 psi | 44% | 1959 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,778 psi | 80% | 3192 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 51,068 psi | 80% | 3196 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,164 psi | 69% | 3058 fps | 96.5% |
| IMR 7828 SSC | <<locked>> | 80% | 39,015 psi | 61% | 3028 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 92% | 37,753 psi | 59% | 3009 fps | 95.1% |
| Lovex S070 | <<locked>> | 80% | 52,692 psi | 83% | 3228 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,824 psi | 55% | 2831 fps | 97.7% |
| Norma 204 | <<locked>> | 80% | 51,634 psi | 81% | 3245 fps | 99.2% |
| Norma 217 | <<locked>> | 88% | 32,837 psi | 51% | 2890 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 43,453 psi | 68% | 3136 fps | 98.9% |
| Norma URP | <<locked>> | 80% | 52,591 psi | 82% | 3245 fps | 100% |
| Ramshot Grand | 95.8 gr | 80% | 38,870 psi | 61% | 3035 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 51,648 psi | 81% | 3248 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,853 psi | 55% | 2887 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,660 psi | 45% | 2005 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,287 psi | 84% | 3317 fps | 100% |
| ReloadSwiss RS 76 | 99.7 gr | 80% | 32,619 psi | 51% | 2900 fps | 95.9% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 43,976 psi | 69% | 3163 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 45,977 psi | 72% | 3107 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 80% | 44,469 psi | 70% | 3110 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 80% | 52,692 psi | 83% | 3228 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,142 psi | 83% | 3179 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,135 psi | 69% | 3104 fps | 98.1% |
| Somchem S361 | <<locked>> | 80% | 47,094 psi | 74% | 3091 fps | 97.2% |
| Somchem S365 | <<locked>> | 80% | 50,183 psi | 79% | 3192 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,889 psi | 70% | 3084 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 80% | 39,102 psi | 61% | 2940 fps | 97.3% |
| Vihtavuori N550 | <<locked>> | 80% | 53,345 psi | 84% | 3238 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,005 psi | 69% | 3094 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,265 psi | 68% | 3130 fps | 96.1% |
| Vihtavuori N565 | <<locked>> | 84% | 41,133 psi | 64% | 3054 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 90% | 45,034 psi | 71% | 3182 fps | 95.6% |
| Vihtavuori N570 | <<locked>> | 96% | 53,505 psi | 84% | 3402 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,795 psi | 84% | 3182 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,347 psi | 59% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,336 psi | 65% | 3002 fps | 97.4% |
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 62 powders for .30-378 Weath. Mag. loaded with the .308 | 150gr | Barnes TSX FN FB. Vihtavuori N570 delivers the highest muzzle velocity at 3,478 fps; across all powders the maximum-charge window runs from 2,185 fps to 3,478 fps. ADI AR 2218 gives the best case fill at 100 %, and 62 of the 62 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 1:15.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, 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 76, Ramshot Grand rank at the top here: for .30-378 Weath. Mag. with the .308 | 150gr | Barnes TSX FN FB 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.