Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | CutEdge Maximus bullet and 65 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.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 90% | 56,579 psi | 89% | 3281 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,869 psi | 89% | 3314 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 54,679 psi | 86% | 3386 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 88% | 55,869 psi | 88% | 3392 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 86% | 54,592 psi | 86% | 3323 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 90% | 56,826 psi | 89% | 3399 fps | 99.3% |
| ADI AR 2217 | <<locked>> | 98% | 55,187 psi | 86% | 3356 fps | 99.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,679 psi | 84% | 3379 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 54,534 psi | 85% | 3320 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 54,157 psi | 85% | 3310 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 57,058 psi | 89% | 3389 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 54,781 psi | 86% | 3294 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 55,027 psi | 86% | 3363 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 55,390 psi | 87% | 3383 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 57,522 psi | 90% | 3448 fps | 97.4% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,711 psi | 90% | 3346 fps | 97.5% |
| Bofors RP15 | <<locked>> | 92% | 56,231 psi | 88% | 3376 fps | 99.7% |
| Bofors RP30 | <<locked>> | 96% | 54,824 psi | 86% | 3366 fps | 99.4% |
| Bofors RP5 | <<locked>> | 90% | 57,058 psi | 89% | 3389 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 96% | 56,826 psi | 89% | 3386 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 88% | 55,927 psi | 88% | 3323 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 88% | 54,940 psi | 86% | 3304 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 54,694 psi | 86% | 3235 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 53,998 psi | 85% | 3448 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,405 psi | 59% | 2178 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,971 psi | 89% | 3304 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,377 psi | 90% | 3304 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,405 psi | 88% | 3304 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 90% | 54,940 psi | 86% | 3373 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 49,008 psi | 77% | 3274 fps | 98.5% |
| Lovex S065 | <<locked>> | 82% | 56,942 psi | 89% | 3278 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,317 psi | 87% | 3274 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 54,520 psi | 85% | 3248 fps | 100% |
| Norma 204 | <<locked>> | 82% | 54,520 psi | 85% | 3301 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 49,748 psi | 78% | 3301 fps | 99.8% |
| Norma MRP | <<locked>> | 88% | 57,101 psi | 89% | 3409 fps | 100% |
| Norma URP | <<locked>> | 82% | 55,230 psi | 87% | 3294 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,086 psi | 88% | 3399 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 82% | 54,404 psi | 85% | 3297 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 54,534 psi | 85% | 3314 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,247 psi | 60% | 2228 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,392 psi | 90% | 3340 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,115 psi | 88% | 3369 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 54,926 psi | 86% | 3438 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 54,302 psi | 85% | 3379 fps | 98.5% |
| Rottweil R 904 | <<locked>> | 86% | 55,216 psi | 87% | 3291 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 88% | 57,479 psi | 90% | 3366 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,942 psi | 89% | 3278 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,317 psi | 87% | 3274 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,927 psi | 88% | 3225 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,072 psi | 89% | 3360 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 56,884 psi | 89% | 3278 fps | 98.9% |
| Somchem S365 | <<locked>> | 84% | 56,608 psi | 89% | 3297 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 54,143 psi | 85% | 3268 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 82% | 56,811 psi | 89% | 3284 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 54,027 psi | 85% | 3248 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 82% | 56,217 psi | 88% | 3291 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,550 psi | 89% | 3323 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,608 psi | 89% | 3406 fps | 99% |
| Vihtavuori N565 | <<locked>> | 94% | 57,319 psi | 90% | 3389 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 96% | 54,911 psi | 86% | 3389 fps | 98.1% |
| Vihtavuori N570 | <<locked>> | 98% | 56,159 psi | 88% | 3455 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,594 psi | 89% | 3225 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 54,331 psi | 85% | 3379 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 54,128 psi | 85% | 3261 fps | 99.6% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 39,914 psi | 63% | 2963 fps | 99% |
| Accurate 4350 | <<locked>> | 80% | 53,156 psi | 83% | 3251 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 43,976 psi | 69% | 3163 fps | 96.9% |
| Accurate MAGPRO | <<locked>> | 82% | 44,759 psi | 70% | 3163 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 44,324 psi | 69% | 3117 fps | 98% |
| ADI AR 2213 | <<locked>> | 80% | 39,624 psi | 62% | 3035 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 88% | 38,740 psi | 61% | 3005 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 86% | 32,764 psi | 51% | 2881 fps | 96.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,981 psi | 80% | 3261 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,251 psi | 69% | 3110 fps | 98% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,176 psi | 63% | 3041 fps | 97% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,783 psi | 61% | 2989 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,431 psi | 52% | 2894 fps | 98% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,859 psi | 69% | 3166 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 49,008 psi | 77% | 3284 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 50,546 psi | 79% | 3212 fps | 95.9% |
| Bofors RP15 | <<locked>> | 80% | 37,260 psi | 58% | 2966 fps | 95.7% |
| Bofors RP30 | <<locked>> | 86% | 38,406 psi | 60% | 3015 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 40,176 psi | 63% | 3041 fps | 97% |
| Hodgdon H1000 | <<locked>> | 84% | 36,680 psi | 57% | 2953 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 80% | 42,134 psi | 66% | 3045 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,495 psi | 65% | 3025 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,805 psi | 75% | 3120 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 82% | 34,954 psi | 55% | 2989 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,978 psi | 44% | 1955 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,053 psi | 78% | 3179 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 50,227 psi | 79% | 3186 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,482 psi | 68% | 3045 fps | 96.3% |
| IMR 7828 SSC | <<locked>> | 82% | 41,031 psi | 64% | 3081 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 94% | 39,537 psi | 62% | 3058 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 53,447 psi | 84% | 3222 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,924 psi | 81% | 3212 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 34,084 psi | 53% | 2815 fps | 97.4% |
| Norma 204 | <<locked>> | 80% | 50,734 psi | 80% | 3232 fps | 99.1% |
| Norma 217 | <<locked>> | 90% | 34,447 psi | 54% | 2943 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 42,540 psi | 67% | 3123 fps | 98.7% |
| Norma URP | <<locked>> | 80% | 51,721 psi | 81% | 3235 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,000 psi | 60% | 3012 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 50,734 psi | 80% | 3235 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,040 psi | 53% | 2874 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,645 psi | 45% | 2001 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,476 psi | 84% | 3274 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,141 psi | 82% | 3301 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 31,836 psi | 50% | 2881 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 42,757 psi | 67% | 3140 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 45,252 psi | 71% | 3094 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 80% | 43,671 psi | 68% | 3094 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,447 psi | 84% | 3222 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,924 psi | 81% | 3212 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,417 psi | 82% | 3166 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,337 psi | 68% | 3091 fps | 97.9% |
| Somchem S361 | <<locked>> | 80% | 46,224 psi | 72% | 3077 fps | 96.9% |
| Somchem S365 | <<locked>> | 80% | 49,269 psi | 77% | 3179 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,150 psi | 69% | 3071 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 80% | 53,229 psi | 83% | 3228 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,406 psi | 60% | 2923 fps | 97% |
| Vihtavuori N550 | <<locked>> | 80% | 52,446 psi | 82% | 3225 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,134 psi | 68% | 3077 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,395 psi | 66% | 3110 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 84% | 40,176 psi | 63% | 3035 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 90% | 43,976 psi | 69% | 3163 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 96% | 52,040 psi | 82% | 3376 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,794 psi | 83% | 3169 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,245 psi | 57% | 3028 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,509 psi | 63% | 2982 fps | 97.1% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 72 powders for .30-378 Weath. Mag. loaded with the .308 | 150gr | CutEdge Maximus. Vihtavuori N570 delivers the highest muzzle velocity at 3,455 fps; across all powders the maximum-charge window runs from 2,178 fps to 3,455 fps. ADI AR 2218 gives the best case fill at 100 %, and 72 of the 72 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 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-33 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, Alliant Reloder-50, IMR 7977 Enduron, Lovex D100 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.