Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | Frontier PH HPFB bullet and 61 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.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 54,346 psi | 85% | 3241 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 56,101 psi | 88% | 3406 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 88% | 57,116 psi | 90% | 3412 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 86% | 55,579 psi | 87% | 3340 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 88% | 53,925 psi | 85% | 3343 fps | 98.9% |
| ADI AR 2217 | <<locked>> | 98% | 56,492 psi | 89% | 3376 fps | 99.6% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 53,171 psi | 83% | 3406 fps | 96.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 55,114 psi | 86% | 3399 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 55,738 psi | 87% | 3333 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,535 psi | 87% | 3333 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,158 psi | 86% | 3323 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 54,418 psi | 85% | 3340 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 90% | 56,144 psi | 88% | 3310 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 56,231 psi | 88% | 3383 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 57,000 psi | 89% | 3402 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 54,476 psi | 85% | 3392 fps | 96.7% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,810 psi | 86% | 3291 fps | 96.9% |
| Bofors RP15 | <<locked>> | 92% | 57,406 psi | 90% | 3392 fps | 99.8% |
| Bofors RP30 | <<locked>> | 96% | 56,159 psi | 88% | 3389 fps | 99.5% |
| Bofors RP5 | <<locked>> | 88% | 54,418 psi | 85% | 3340 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 94% | 54,070 psi | 85% | 3337 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 88% | 56,971 psi | 89% | 3337 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,956 psi | 88% | 3317 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,767 psi | 87% | 3245 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 55,230 psi | 87% | 3468 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,449 psi | 59% | 2175 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 54,389 psi | 85% | 3255 fps | 99.9% |
| IMR 4831 | <<locked>> | 82% | 54,955 psi | 86% | 3261 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,464 psi | 90% | 3317 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 90% | 56,043 psi | 88% | 3389 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,372 psi | 79% | 3297 fps | 98.8% |
| Lovex S070 | <<locked>> | 82% | 56,608 psi | 89% | 3291 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 56,014 psi | 88% | 3268 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,506 psi | 87% | 3310 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 51,213 psi | 80% | 3323 fps | 99.9% |
| Norma MRP | <<locked>> | 86% | 54,462 psi | 85% | 3360 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,492 psi | 89% | 3310 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,290 psi | 90% | 3412 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 82% | 55,477 psi | 87% | 3310 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 56,014 psi | 88% | 3333 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,450 psi | 60% | 2228 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,406 psi | 90% | 3383 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 56,463 psi | 88% | 3458 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,970 psi | 88% | 3409 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 86% | 56,159 psi | 88% | 3301 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 86% | 54,911 psi | 86% | 3314 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 82% | 56,608 psi | 89% | 3291 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,101 psi | 89% | 3238 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 54,520 psi | 85% | 3310 fps | 99.6% |
| Somchem S361 | <<locked>> | 84% | 54,172 psi | 85% | 3225 fps | 98.5% |
| Somchem S365 | <<locked>> | 82% | 54,114 psi | 85% | 3255 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,347 psi | 87% | 3281 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 90% | 55,303 psi | 87% | 3264 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 57,290 psi | 90% | 3301 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 54,317 psi | 85% | 3281 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 53,954 psi | 85% | 3356 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 92% | 54,853 psi | 86% | 3340 fps | 98.9% |
| Vihtavuori N568 | <<locked>> | 96% | 56,275 psi | 88% | 3412 fps | 98.4% |
| Vihtavuori N570 | <<locked>> | 98% | 57,479 psi | 90% | 3474 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,854 psi | 88% | 3399 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,245 psi | 87% | 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% | 41,321 psi | 65% | 2989 fps | 99.2% |
| Accurate High Country | <<locked>> | 80% | 45,339 psi | 71% | 3189 fps | 97.3% |
| Accurate MAGPRO | <<locked>> | 80% | 42,772 psi | 67% | 3114 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 45,281 psi | 71% | 3136 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 80% | 40,654 psi | 64% | 3058 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 88% | 39,769 psi | 62% | 3025 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 98% | 49,371 psi | 77% | 3320 fps | 95% |
| ADI AR 2225 | <<locked>> | 84% | 31,734 psi | 50% | 2841 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 45,672 psi | 72% | 3133 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,967 psi | 81% | 3271 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,237 psi | 71% | 3127 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,321 psi | 65% | 3068 fps | 97.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,972 psi | 63% | 3012 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,534 psi | 54% | 2923 fps | 98.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,223 psi | 71% | 3189 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 50,531 psi | 79% | 3310 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 48,196 psi | 76% | 3159 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 38,392 psi | 60% | 2989 fps | 96.2% |
| Bofors RP30 | <<locked>> | 84% | 37,043 psi | 58% | 2976 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 41,321 psi | 65% | 3068 fps | 97.3% |
| Hodgdon H1000 | <<locked>> | 84% | 37,855 psi | 59% | 2979 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 80% | 43,250 psi | 68% | 3064 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,467 psi | 67% | 3045 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,878 psi | 77% | 3133 fps | 100% |
| Hodgdon Retumbo | 91.5 gr | 80% | 33,721 psi | 53% | 2949 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,152 psi | 44% | 1955 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,966 psi | 80% | 3192 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 51,372 psi | 81% | 3202 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,367 psi | 70% | 3061 fps | 96.5% |
| IMR 7828 SSC | <<locked>> | 80% | 39,334 psi | 62% | 3031 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 92% | 38,101 psi | 60% | 3018 fps | 95.2% |
| Lovex S070 | <<locked>> | 80% | 53,011 psi | 83% | 3228 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,563 psi | 56% | 2848 fps | 97.9% |
| Norma 204 | <<locked>> | 80% | 51,866 psi | 81% | 3245 fps | 99.2% |
| Norma 217 | <<locked>> | 88% | 33,388 psi | 52% | 2907 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 43,874 psi | 69% | 3146 fps | 99% |
| Norma URP | <<locked>> | 80% | 52,808 psi | 83% | 3248 fps | 100% |
| Ramshot Grand | 94.2 gr | 80% | 39,276 psi | 62% | 3041 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 51,924 psi | 81% | 3248 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,230 psi | 55% | 2900 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,863 psi | 45% | 2001 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,229 psi | 83% | 3317 fps | 100% |
| ReloadSwiss RS 76 | 97.9 gr | 80% | 33,011 psi | 52% | 2913 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 44,324 psi | 69% | 3173 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 46,195 psi | 72% | 3110 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 80% | 44,759 psi | 70% | 3114 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 80% | 53,011 psi | 83% | 3228 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,461 psi | 84% | 3176 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,411 psi | 70% | 3110 fps | 98.1% |
| Somchem S361 | <<locked>> | 80% | 47,239 psi | 74% | 3091 fps | 97.1% |
| Somchem S365 | <<locked>> | 80% | 50,473 psi | 79% | 3196 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,310 psi | 71% | 3091 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 80% | 39,479 psi | 62% | 2946 fps | 97.4% |
| Vihtavuori N550 | <<locked>> | 80% | 53,693 psi | 84% | 3241 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,454 psi | 70% | 3100 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,627 psi | 68% | 3136 fps | 96.2% |
| Vihtavuori N565 | <<locked>> | 84% | 41,626 psi | 65% | 3064 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 90% | 45,266 psi | 71% | 3189 fps | 95.6% |
| Vihtavuori N570 | <<locked>> | 96% | 53,563 psi | 84% | 3399 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,768 psi | 59% | 3061 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,727 psi | 65% | 3009 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 61 powders for .30-378 Weath. Mag. loaded with the .308 | 150gr | Frontier PH HPFB. Vihtavuori N570 delivers the highest muzzle velocity at 3,474 fps; across all powders the maximum-charge window runs from 2,175 fps to 3,474 fps. ADI AR 2218 gives the best case fill at 100 %, and 61 of the 61 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 1:13.0 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 | Frontier PH HPFB 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.