Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | AERO SB | HSD 2.0,- smax:15.60 bullet and 68 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 ReloadSwiss RS 80.
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% | 55,840 psi | 88% | 3268 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,202 psi | 88% | 3301 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 54,099 psi | 85% | 3373 fps | 99% |
| Accurate MAGPRO | <<locked>> | 88% | 54,984 psi | 86% | 3373 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 86% | 53,853 psi | 84% | 3310 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 90% | 56,072 psi | 88% | 3383 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 98% | 54,534 psi | 85% | 3346 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,881 psi | 83% | 3363 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 54,056 psi | 85% | 3304 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 84% | 57,653 psi | 90% | 3369 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,217 psi | 90% | 3360 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,333 psi | 88% | 3376 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 54,041 psi | 85% | 3281 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 54,288 psi | 85% | 3350 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 54,607 psi | 86% | 3369 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,565 psi | 89% | 3432 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,014 psi | 89% | 3333 fps | 97.3% |
| Bofors RP15 | <<locked>> | 92% | 55,521 psi | 87% | 3363 fps | 99.7% |
| Bofors RP30 | <<locked>> | 96% | 53,983 psi | 85% | 3353 fps | 99.3% |
| Bofors RP5 | <<locked>> | 90% | 56,333 psi | 88% | 3376 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 57,638 psi | 90% | 3304 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 56,115 psi | 88% | 3373 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 88% | 55,245 psi | 87% | 3307 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 54,244 psi | 85% | 3291 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 54,041 psi | 85% | 3222 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,130 psi | 90% | 3507 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,260 psi | 58% | 2172 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,420 psi | 88% | 3294 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 56,768 psi | 89% | 3294 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 55,927 psi | 88% | 3294 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 90% | 54,186 psi | 85% | 3360 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,225 psi | 76% | 3255 fps | 98.3% |
| Lovex S065 | <<locked>> | 82% | 56,347 psi | 88% | 3264 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,723 psi | 86% | 3261 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 57,392 psi | 90% | 3294 fps | 100% |
| Norma 204 | <<locked>> | 82% | 53,940 psi | 85% | 3287 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 48,878 psi | 77% | 3284 fps | 99.7% |
| Norma MRP | <<locked>> | 88% | 56,333 psi | 88% | 3396 fps | 100% |
| Norma URP | <<locked>> | 82% | 54,621 psi | 86% | 3281 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 55,259 psi | 87% | 3379 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 84% | 57,609 psi | 90% | 3353 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 53,693 psi | 84% | 3301 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,218 psi | 60% | 2221 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 56,797 psi | 89% | 3327 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 55,506 psi | 87% | 3356 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 54,056 psi | 85% | 3419 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 53,519 psi | 84% | 3369 fps | 98.3% |
| Rottweil R 904 | <<locked>> | 86% | 54,665 psi | 86% | 3278 fps | 99% |
| Rottweil R 905 | <<locked>> | 88% | 56,739 psi | 89% | 3350 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 57,638 psi | 90% | 3304 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,347 psi | 88% | 3264 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,723 psi | 86% | 3261 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,361 psi | 87% | 3212 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,333 psi | 88% | 3343 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 56,289 psi | 88% | 3264 fps | 98.8% |
| Somchem S365 | <<locked>> | 84% | 55,941 psi | 88% | 3287 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,203 psi | 90% | 3317 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 56,202 psi | 88% | 3274 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,174 psi | 90% | 3297 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 55,448 psi | 87% | 3278 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 55,927 psi | 88% | 3314 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 55,869 psi | 88% | 3392 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 94% | 56,449 psi | 88% | 3373 fps | 99.1% |
| Vihtavuori N568 | <<locked>> | 96% | 54,099 psi | 85% | 3373 fps | 97.9% |
| Vihtavuori N570 | <<locked>> | 98% | 55,288 psi | 87% | 3438 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,072 psi | 88% | 3219 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 53,432 psi | 84% | 3369 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,406 psi | 90% | 3314 fps | 99.8% |
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% | 39,363 psi | 62% | 2946 fps | 98.8% |
| Accurate 4350 | <<locked>> | 80% | 52,460 psi | 82% | 3238 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 43,366 psi | 68% | 3146 fps | 96.7% |
| Accurate MAGPRO | <<locked>> | 82% | 44,193 psi | 69% | 3150 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 43,743 psi | 69% | 3104 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 80% | 39,117 psi | 61% | 3022 fps | 95% |
| ADI AR 2217 | <<locked>> | 88% | 38,159 psi | 60% | 2986 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 86% | 32,329 psi | 51% | 2867 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 44,135 psi | 69% | 3104 fps | 97.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,285 psi | 79% | 3245 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,714 psi | 69% | 3097 fps | 97.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 39,624 psi | 62% | 3028 fps | 96.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,218 psi | 60% | 2976 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,953 psi | 52% | 2881 fps | 97.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,105 psi | 68% | 3150 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 52,156 psi | 82% | 3350 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 50,082 psi | 78% | 3202 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 36,738 psi | 58% | 2953 fps | 95.5% |
| Bofors RP30 | <<locked>> | 86% | 37,739 psi | 59% | 2995 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 39,624 psi | 62% | 3028 fps | 96.7% |
| Bofors RP7 | <<locked>> | 80% | 54,056 psi | 85% | 3241 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 84% | 36,216 psi | 57% | 2940 fps | 95% |
| Hodgdon H4831 | <<locked>> | 80% | 41,727 psi | 65% | 3031 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 40,959 psi | 64% | 3012 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,311 psi | 74% | 3107 fps | 100% |
| Hodgdon Retumbo | 92.8 gr | 82% | 34,476 psi | 54% | 2976 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,978 psi | 44% | 1949 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,472 psi | 78% | 3166 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 49,617 psi | 78% | 3173 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,004 psi | 67% | 3031 fps | 96% |
| IMR 7828 SSC | <<locked>> | 82% | 40,480 psi | 63% | 3064 fps | 95.7% |
| IMR 8133 Enduron | <<locked>> | 94% | 38,914 psi | 61% | 3041 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 52,852 psi | 83% | 3209 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,314 psi | 80% | 3202 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 33,678 psi | 53% | 2802 fps | 97.2% |
| Norma 204 | <<locked>> | 80% | 50,169 psi | 79% | 3215 fps | 98.9% |
| Norma 217 | <<locked>> | 90% | 33,837 psi | 53% | 2923 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 41,974 psi | 66% | 3110 fps | 98.6% |
| Norma URP | <<locked>> | 80% | 51,111 psi | 80% | 3222 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 40,553 psi | 64% | 3077 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 80% | 50,154 psi | 79% | 3222 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 33,562 psi | 53% | 2854 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,529 psi | 45% | 1995 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,823 psi | 83% | 3261 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,488 psi | 81% | 3287 fps | 100% |
| ReloadSwiss RS 76 | 99.4 gr | 82% | 33,895 psi | 53% | 2946 fps | 96.5% |
| ReloadSwiss RS 80 | 109.9 gr | 90% | 42,018 psi | 66% | 3123 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 44,701 psi | 70% | 3077 fps | 97% |
| Rottweil R 905 | <<locked>> | 80% | 43,105 psi | 68% | 3081 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 80% | 54,056 psi | 85% | 3241 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 52,852 psi | 83% | 3209 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,314 psi | 80% | 3202 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 51,866 psi | 81% | 3153 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 42,772 psi | 67% | 3074 fps | 97.7% |
| Somchem S361 | <<locked>> | 80% | 45,774 psi | 72% | 3064 fps | 96.7% |
| Somchem S365 | <<locked>> | 80% | 48,602 psi | 76% | 3166 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 43,598 psi | 68% | 3058 fps | 98.6% |
| Vihtavuori N160 | <<locked>> | 80% | 52,620 psi | 82% | 3215 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 37,884 psi | 59% | 2910 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 80% | 51,851 psi | 81% | 3215 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 42,496 psi | 67% | 3064 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,814 psi | 66% | 3097 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 84% | 39,682 psi | 62% | 3018 fps | 95% |
| Vihtavuori N568 | <<locked>> | 92% | 46,615 psi | 73% | 3222 fps | 96% |
| Vihtavuori N570 | <<locked>> | 96% | 51,213 psi | 80% | 3356 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,112 psi | 82% | 3156 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,592 psi | 56% | 3012 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,001 psi | 63% | 2969 fps | 96.9% |
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 68 powders for .30-378 Weath. Mag. loaded with the .308 | 150gr | AERO SB | HSD 2.0,- smax:15.60. Hodgdon Retumbo delivers the highest muzzle velocity at 3,507 fps; across all powders the maximum-charge window runs from 2,172 fps to 3,507 fps. ADI AR 2225 gives the best case fill at 100 %, and 68 of the 68 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, 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 2225, Alliant Reloder-33, 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, ReloadSwiss RS 80 rank at the top here: for .30-378 Weath. Mag. with the .308 | 150gr | AERO SB | HSD 2.0,- smax:15.60 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.