Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | Hasler Hunting 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% | 56,333 psi | 88% | 3278 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,608 psi | 89% | 3307 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 54,447 psi | 85% | 3379 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 88% | 55,492 psi | 87% | 3386 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 86% | 54,201 psi | 85% | 3317 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 90% | 56,434 psi | 88% | 3392 fps | 99.3% |
| ADI AR 2217 | <<locked>> | 98% | 54,998 psi | 86% | 3353 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,519 psi | 84% | 3373 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 54,259 psi | 85% | 3314 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,522 psi | 90% | 3366 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,681 psi | 89% | 3383 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 54,549 psi | 85% | 3287 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 54,766 psi | 86% | 3360 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 55,129 psi | 86% | 3376 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 57,188 psi | 90% | 3445 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,377 psi | 90% | 3340 fps | 97.4% |
| Bofors RP15 | <<locked>> | 92% | 55,854 psi | 88% | 3369 fps | 99.7% |
| Bofors RP30 | <<locked>> | 96% | 54,462 psi | 85% | 3360 fps | 99.3% |
| Bofors RP5 | <<locked>> | 90% | 56,681 psi | 89% | 3383 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 96% | 56,594 psi | 89% | 3383 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 88% | 55,724 psi | 87% | 3317 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 54,578 psi | 86% | 3297 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 54,433 psi | 85% | 3232 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,667 psi | 90% | 3517 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,362 psi | 59% | 2175 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,739 psi | 89% | 3301 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,130 psi | 90% | 3301 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,217 psi | 88% | 3297 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 90% | 54,679 psi | 86% | 3366 fps | 99.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,675 psi | 76% | 3264 fps | 98.4% |
| Lovex S065 | <<locked>> | 82% | 56,695 psi | 89% | 3274 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,071 psi | 86% | 3268 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 54,317 psi | 85% | 3245 fps | 100% |
| Norma 204 | <<locked>> | 82% | 54,259 psi | 85% | 3297 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 49,371 psi | 77% | 3294 fps | 99.8% |
| Norma MRP | <<locked>> | 88% | 56,869 psi | 89% | 3402 fps | 100% |
| Norma URP | <<locked>> | 82% | 54,969 psi | 86% | 3287 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 55,811 psi | 87% | 3392 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 82% | 54,186 psi | 85% | 3294 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 54,346 psi | 85% | 3310 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,174 psi | 60% | 2224 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,159 psi | 90% | 3333 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 55,883 psi | 88% | 3363 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 54,534 psi | 85% | 3428 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 53,954 psi | 85% | 3376 fps | 98.4% |
| Rottweil R 904 | <<locked>> | 86% | 55,013 psi | 86% | 3284 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 88% | 57,246 psi | 90% | 3360 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,695 psi | 89% | 3274 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,071 psi | 86% | 3268 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,680 psi | 87% | 3222 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,840 psi | 89% | 3353 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 56,536 psi | 89% | 3271 fps | 98.8% |
| Somchem S365 | <<locked>> | 84% | 56,333 psi | 88% | 3294 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,537 psi | 90% | 3320 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 56,565 psi | 89% | 3281 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,624 psi | 90% | 3304 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 55,985 psi | 88% | 3284 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,289 psi | 88% | 3320 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,391 psi | 88% | 3402 fps | 99% |
| Vihtavuori N565 | <<locked>> | 94% | 56,913 psi | 89% | 3383 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 96% | 54,534 psi | 85% | 3383 fps | 98% |
| Vihtavuori N570 | <<locked>> | 98% | 55,782 psi | 87% | 3448 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,405 psi | 88% | 3222 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 53,882 psi | 84% | 3373 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,682 psi | 90% | 3320 fps | 99.8% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 39,682 psi | 62% | 2956 fps | 98.9% |
| Accurate 4350 | <<locked>> | 80% | 52,881 psi | 83% | 3248 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 43,743 psi | 69% | 3156 fps | 96.8% |
| Accurate MAGPRO | <<locked>> | 82% | 44,541 psi | 70% | 3159 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 44,092 psi | 69% | 3114 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 80% | 39,436 psi | 62% | 3028 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 88% | 38,566 psi | 60% | 2999 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 86% | 32,576 psi | 51% | 2877 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,705 psi | 79% | 3255 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,063 psi | 69% | 3104 fps | 97.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,958 psi | 63% | 3038 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,566 psi | 60% | 2986 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,228 psi | 52% | 2887 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,627 psi | 68% | 3159 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 48,675 psi | 76% | 3278 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 50,430 psi | 79% | 3209 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 37,043 psi | 58% | 2959 fps | 95.6% |
| Bofors RP30 | <<locked>> | 86% | 38,203 psi | 60% | 3009 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 39,958 psi | 63% | 3038 fps | 96.9% |
| Hodgdon H1000 | <<locked>> | 84% | 36,506 psi | 57% | 2946 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 80% | 42,047 psi | 66% | 3041 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,278 psi | 65% | 3018 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,558 psi | 75% | 3114 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 82% | 34,766 psi | 54% | 2982 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,992 psi | 44% | 1952 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,821 psi | 78% | 3173 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 49,980 psi | 78% | 3179 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,308 psi | 68% | 3041 fps | 96.2% |
| IMR 7828 SSC | <<locked>> | 82% | 40,799 psi | 64% | 3074 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 94% | 39,189 psi | 61% | 3048 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 53,214 psi | 83% | 3215 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,677 psi | 81% | 3209 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 33,866 psi | 53% | 2808 fps | 97.3% |
| Norma 204 | <<locked>> | 80% | 50,517 psi | 79% | 3222 fps | 99% |
| Norma 217 | <<locked>> | 90% | 34,229 psi | 54% | 2936 fps | 96% |
| Norma MRP | <<locked>> | 80% | 42,308 psi | 66% | 3117 fps | 98.7% |
| Norma URP | <<locked>> | 80% | 51,488 psi | 81% | 3228 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 37,782 psi | 59% | 3009 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 50,502 psi | 79% | 3228 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,852 psi | 53% | 2864 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,558 psi | 45% | 1995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,229 psi | 83% | 3268 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,895 psi | 81% | 3294 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 31,662 psi | 50% | 2874 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 42,583 psi | 67% | 3140 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 45,034 psi | 71% | 3087 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 80% | 43,424 psi | 68% | 3087 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,214 psi | 83% | 3215 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,677 psi | 81% | 3209 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,185 psi | 82% | 3159 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,091 psi | 68% | 3084 fps | 97.8% |
| Somchem S361 | <<locked>> | 80% | 46,035 psi | 72% | 3071 fps | 96.8% |
| Somchem S365 | <<locked>> | 80% | 49,008 psi | 77% | 3173 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,932 psi | 69% | 3064 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 80% | 52,997 psi | 83% | 3222 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,189 psi | 60% | 2920 fps | 96.9% |
| Vihtavuori N550 | <<locked>> | 80% | 52,199 psi | 82% | 3222 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,873 psi | 67% | 3071 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,177 psi | 66% | 3107 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 84% | 39,958 psi | 63% | 3028 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 90% | 43,656 psi | 68% | 3156 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 96% | 51,663 psi | 81% | 3366 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,591 psi | 82% | 3166 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,969 psi | 56% | 3022 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,306 psi | 63% | 2979 fps | 97% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 71 powders for .30-378 Weath. Mag. loaded with the .308 | 150gr | Hasler Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 3,517 fps; across all powders the maximum-charge window runs from 2,175 fps to 3,517 fps. ADI AR 2218 gives the best case fill at 100 %, and 71 of the 71 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.