Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | Nosler Expansion Tip bullet and 67 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% | 55,883 psi | 88% | 3271 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,231 psi | 88% | 3304 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 53,954 psi | 85% | 3373 fps | 99% |
| Accurate MAGPRO | <<locked>> | 88% | 54,853 psi | 86% | 3373 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 88% | 57,667 psi | 90% | 3376 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 90% | 55,941 psi | 88% | 3383 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 98% | 54,244 psi | 85% | 3340 fps | 99.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,750 psi | 83% | 3363 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,479 psi | 90% | 3369 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,072 psi | 89% | 3360 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,202 psi | 88% | 3376 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 54,041 psi | 85% | 3281 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 54,157 psi | 85% | 3350 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 54,462 psi | 85% | 3366 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,260 psi | 88% | 3428 fps | 97% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 56,927 psi | 89% | 3333 fps | 97.3% |
| Bofors RP15 | <<locked>> | 92% | 55,390 psi | 87% | 3360 fps | 99.7% |
| Bofors RP30 | <<locked>> | 98% | 57,667 psi | 90% | 3419 fps | 99.6% |
| Bofors RP5 | <<locked>> | 90% | 56,202 psi | 88% | 3376 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 57,653 psi | 90% | 3307 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 55,999 psi | 88% | 3373 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 88% | 55,114 psi | 86% | 3307 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 54,114 psi | 85% | 3287 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 57,653 psi | 90% | 3278 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 56,971 psi | 89% | 3504 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,347 psi | 59% | 2172 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,275 psi | 88% | 3287 fps | 99.9% |
| IMR 4831 | <<locked>> | 84% | 56,623 psi | 89% | 3294 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 55,811 psi | 87% | 3291 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 90% | 54,041 psi | 85% | 3356 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 47,906 psi | 75% | 3248 fps | 98.2% |
| Lovex S065 | <<locked>> | 82% | 56,362 psi | 88% | 3268 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,766 psi | 86% | 3264 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,261 psi | 90% | 3294 fps | 100% |
| Norma 204 | <<locked>> | 84% | 57,682 psi | 90% | 3353 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 48,747 psi | 76% | 3281 fps | 99.7% |
| Norma MRP | <<locked>> | 88% | 56,188 psi | 88% | 3392 fps | 100% |
| Norma URP | <<locked>> | 82% | 54,621 psi | 86% | 3281 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 55,114 psi | 86% | 3379 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 84% | 57,464 psi | 90% | 3350 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 53,577 psi | 84% | 3297 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,174 psi | 60% | 2221 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,652 psi | 89% | 3323 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 55,376 psi | 87% | 3356 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 53,896 psi | 84% | 3419 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 57,711 psi | 90% | 3445 fps | 99% |
| Rottweil R 904 | <<locked>> | 86% | 54,563 psi | 86% | 3278 fps | 99% |
| Rottweil R 905 | <<locked>> | 88% | 56,768 psi | 89% | 3350 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 57,653 psi | 90% | 3307 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,362 psi | 88% | 3268 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,766 psi | 86% | 3264 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,376 psi | 87% | 3212 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,362 psi | 88% | 3343 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 56,173 psi | 88% | 3264 fps | 98.8% |
| Somchem S365 | <<locked>> | 84% | 55,782 psi | 87% | 3284 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,058 psi | 89% | 3314 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 56,217 psi | 88% | 3274 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,058 psi | 89% | 3294 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 55,506 psi | 87% | 3278 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 55,782 psi | 87% | 3310 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 55,738 psi | 87% | 3389 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 94% | 56,333 psi | 88% | 3373 fps | 99.1% |
| Vihtavuori N568 | <<locked>> | 96% | 53,954 psi | 85% | 3369 fps | 97.9% |
| Vihtavuori N570 | <<locked>> | 98% | 54,984 psi | 86% | 3435 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 55,941 psi | 88% | 3215 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 57,595 psi | 90% | 3432 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,290 psi | 90% | 3314 fps | 99.8% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 39,247 psi | 62% | 2946 fps | 98.8% |
| Accurate 4350 | <<locked>> | 80% | 52,315 psi | 82% | 3235 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 43,265 psi | 68% | 3143 fps | 96.6% |
| Accurate MAGPRO | <<locked>> | 82% | 44,106 psi | 69% | 3150 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 43,613 psi | 68% | 3104 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 80% | 38,986 psi | 61% | 3018 fps | 95% |
| ADI AR 2217 | <<locked>> | 88% | 38,058 psi | 60% | 2986 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 86% | 32,242 psi | 51% | 2864 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,314 psi | 79% | 3248 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,584 psi | 68% | 3094 fps | 97.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,508 psi | 62% | 3028 fps | 96.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,189 psi | 60% | 2979 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,822 psi | 51% | 2877 fps | 97.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,105 psi | 68% | 3150 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 52,040 psi | 82% | 3346 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 49,995 psi | 78% | 3199 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 36,608 psi | 57% | 2946 fps | 95.4% |
| Bofors RP30 | <<locked>> | 86% | 37,739 psi | 59% | 2995 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 39,508 psi | 62% | 3028 fps | 96.7% |
| Bofors RP7 | <<locked>> | 80% | 54,056 psi | 85% | 3245 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 84% | 36,143 psi | 57% | 2936 fps | 95% |
| Hodgdon H4831 | <<locked>> | 80% | 41,640 psi | 65% | 3028 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,872 psi | 64% | 3012 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,181 psi | 74% | 3107 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 82% | 34,461 psi | 54% | 2976 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,934 psi | 44% | 1949 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,371 psi | 77% | 3166 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 49,458 psi | 78% | 3169 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 42,873 psi | 67% | 3028 fps | 96% |
| IMR 7828 SSC | <<locked>> | 82% | 40,509 psi | 63% | 3064 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 94% | 38,798 psi | 61% | 3041 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 52,866 psi | 83% | 3209 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,198 psi | 80% | 3199 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 33,547 psi | 53% | 2799 fps | 97.1% |
| Norma 204 | <<locked>> | 80% | 50,038 psi | 78% | 3212 fps | 98.9% |
| Norma 217 | <<locked>> | 90% | 33,721 psi | 53% | 2923 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 41,829 psi | 66% | 3107 fps | 98.5% |
| Norma URP | <<locked>> | 80% | 50,966 psi | 80% | 3219 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 40,422 psi | 63% | 3074 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 80% | 50,009 psi | 78% | 3219 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,446 psi | 52% | 2854 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,601 psi | 45% | 1995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,707 psi | 83% | 3261 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,387 psi | 81% | 3287 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 82% | 33,794 psi | 53% | 2943 fps | 96.4% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 41,858 psi | 66% | 3120 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 44,599 psi | 70% | 3077 fps | 97% |
| Rottweil R 905 | <<locked>> | 80% | 42,960 psi | 67% | 3077 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 80% | 54,056 psi | 85% | 3245 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,866 psi | 83% | 3209 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,198 psi | 80% | 3199 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,735 psi | 81% | 3150 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,627 psi | 67% | 3071 fps | 97.6% |
| Somchem S361 | <<locked>> | 80% | 45,658 psi | 72% | 3061 fps | 96.6% |
| Somchem S365 | <<locked>> | 80% | 48,472 psi | 76% | 3166 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,468 psi | 68% | 3054 fps | 98.5% |
| Vihtavuori N160 | <<locked>> | 80% | 52,460 psi | 82% | 3212 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,782 psi | 59% | 2910 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 80% | 51,866 psi | 81% | 3215 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,482 psi | 67% | 3064 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,713 psi | 65% | 3094 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 84% | 39,552 psi | 62% | 3018 fps | 95% |
| Vihtavuori N568 | <<locked>> | 92% | 46,514 psi | 73% | 3219 fps | 96% |
| Vihtavuori N570 | <<locked>> | 96% | 51,053 psi | 80% | 3353 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,156 psi | 82% | 3159 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,447 psi | 56% | 3009 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,030 psi | 63% | 2969 fps | 96.9% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 73 powders for .30-378 Weath. Mag. loaded with the .308 | 150gr | Nosler Expansion Tip. Hodgdon Retumbo delivers the highest muzzle velocity at 3,504 fps; across all powders the maximum-charge window runs from 2,172 fps to 3,504 fps. ADI AR 2218 gives the best case fill at 100 %, and 73 of the 73 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.