Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | Remington BronzePoint bullet and 54 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>> | 88% | 56,217 psi | 88% | 3268 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 54,157 psi | 85% | 3369 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 86% | 55,158 psi | 86% | 3373 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 86% | 57,305 psi | 90% | 3366 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 88% | 55,796 psi | 87% | 3376 fps | 99.3% |
| ADI AR 2217 | <<locked>> | 96% | 54,708 psi | 86% | 3343 fps | 99.5% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,390 psi | 87% | 3455 fps | 97.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 3435 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,392 psi | 90% | 3360 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,985 psi | 89% | 3356 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,260 psi | 88% | 3369 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 54,433 psi | 85% | 3281 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 54,665 psi | 86% | 3350 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 54,955 psi | 86% | 3366 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 57,217 psi | 90% | 3438 fps | 97.4% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,623 psi | 89% | 3327 fps | 97.5% |
| Bofors RP15 | <<locked>> | 90% | 55,622 psi | 87% | 3356 fps | 99.7% |
| Bofors RP30 | <<locked>> | 94% | 54,679 psi | 86% | 3360 fps | 99.5% |
| Bofors RP5 | <<locked>> | 88% | 56,260 psi | 88% | 3369 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 94% | 56,144 psi | 88% | 3373 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 86% | 54,911 psi | 86% | 3301 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,682 psi | 90% | 3350 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,522 psi | 90% | 3271 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 53,679 psi | 84% | 3435 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,608 psi | 59% | 2188 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,912 psi | 88% | 3281 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,637 psi | 89% | 3287 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,376 psi | 87% | 3284 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 88% | 54,244 psi | 85% | 3353 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,576 psi | 82% | 3333 fps | 99.2% |
| Lovex S071 | <<locked>> | 92% | 54,418 psi | 85% | 3241 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,203 psi | 90% | 3343 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 53,737 psi | 84% | 3363 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,521 psi | 89% | 3392 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,376 psi | 87% | 3376 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 82% | 57,188 psi | 90% | 3340 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 53,998 psi | 85% | 3297 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,595 psi | 60% | 2241 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 54,636 psi | 86% | 3419 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 54,215 psi | 85% | 3373 fps | 98.6% |
| Rottweil R 904 | <<locked>> | 84% | 54,157 psi | 85% | 3268 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 86% | 56,681 psi | 89% | 3343 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,289 psi | 88% | 3340 fps | 99.8% |
| Somchem S361 | <<locked>> | 84% | 55,811 psi | 87% | 3258 fps | 98.9% |
| Somchem S365 | <<locked>> | 82% | 55,956 psi | 88% | 3278 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 57,145 psi | 90% | 3310 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,145 psi | 90% | 3294 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 56,217 psi | 88% | 3310 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,956 psi | 88% | 3389 fps | 99% |
| Vihtavuori N565 | <<locked>> | 92% | 56,927 psi | 89% | 3376 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 94% | 54,621 psi | 86% | 3376 fps | 98.2% |
| Vihtavuori N570 | <<locked>> | 96% | 55,912 psi | 88% | 3442 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 88% | 54,259 psi | 85% | 3366 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,116 psi | 90% | 3307 fps | 99.8% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 42,743 psi | 67% | 3018 fps | 99.5% |
| Accurate High Country | <<locked>> | 80% | 46,934 psi | 74% | 3222 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 80% | 44,512 psi | 70% | 3153 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 46,717 psi | 73% | 3166 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 80% | 42,076 psi | 66% | 3091 fps | 96.4% |
| ADI AR 2217 | <<locked>> | 86% | 38,551 psi | 60% | 2995 fps | 95.6% |
| ADI AR 2218 | <<locked>> | 98% | 51,343 psi | 80% | 3366 fps | 96% |
| ADI AR 2225 | <<locked>> | 82% | 30,748 psi | 48% | 2805 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,664 psi | 84% | 3297 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,630 psi | 73% | 3156 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,830 psi | 67% | 3100 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,481 psi | 65% | 3041 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,839 psi | 56% | 2953 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,253 psi | 74% | 3225 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 48,994 psi | 77% | 3278 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 49,705 psi | 78% | 3192 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 39,755 psi | 62% | 3022 fps | 96.8% |
| Bofors RP30 | <<locked>> | 84% | 38,493 psi | 60% | 3009 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 42,830 psi | 67% | 3100 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 82% | 36,521 psi | 57% | 2943 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 80% | 44,686 psi | 70% | 3097 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,918 psi | 69% | 3077 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,459 psi | 79% | 3159 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 35,070 psi | 55% | 2986 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,210 psi | 44% | 1965 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,330 psi | 82% | 3219 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 52,939 psi | 83% | 3228 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,629 psi | 72% | 3087 fps | 97% |
| IMR 7828 SSC | <<locked>> | 80% | 40,814 psi | 64% | 3068 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 92% | 39,885 psi | 63% | 3058 fps | 96.1% |
| Lovex S071 | <<locked>> | 80% | 36,840 psi | 58% | 2877 fps | 98.3% |
| Norma 204 | <<locked>> | 80% | 53,417 psi | 84% | 3274 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 32,489 psi | 51% | 2874 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 45,498 psi | 71% | 3179 fps | 99.3% |
| Ramshot Grand | <<locked>> | 80% | 40,828 psi | 64% | 3081 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 80% | 53,505 psi | 84% | 3274 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,738 psi | 58% | 2936 fps | 96.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,921 psi | 45% | 2011 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 34,461 psi | 54% | 2956 fps | 97% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 42,975 psi | 67% | 3136 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 47,543 psi | 75% | 3136 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 80% | 46,238 psi | 72% | 3143 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,905 psi | 72% | 3140 fps | 98.6% |
| Somchem S361 | <<locked>> | 80% | 48,762 psi | 76% | 3123 fps | 97.6% |
| Somchem S365 | <<locked>> | 80% | 52,156 psi | 82% | 3219 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,804 psi | 73% | 3120 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 80% | 40,756 psi | 64% | 2976 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 46,050 psi | 72% | 3130 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,136 psi | 71% | 3169 fps | 96.8% |
| Vihtavuori N565 | <<locked>> | 82% | 40,263 psi | 63% | 3028 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 88% | 43,976 psi | 69% | 3153 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 94% | 51,866 psi | 81% | 3363 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,624 psi | 62% | 3091 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,134 psi | 68% | 3038 fps | 97.9% |
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 | Remington BronzePoint. ADI AR 2218 delivers the highest muzzle velocity at 3,455 fps; across all powders the maximum-charge window runs from 2,188 fps to 3,455 fps. Accurate 8700 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 1:16.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2218, ADI AR 2225 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, Accurate 8700, 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.