Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 150gr | Nosler RDF 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% | 56,797 psi | 89% | 3278 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,130 psi | 90% | 3314 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 54,650 psi | 86% | 3383 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 88% | 55,753 psi | 87% | 3386 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 86% | 54,288 psi | 85% | 3314 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 90% | 56,420 psi | 88% | 3389 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 98% | 55,027 psi | 86% | 3350 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,505 psi | 84% | 3373 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 54,404 psi | 85% | 3314 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,696 psi | 90% | 3366 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,811 psi | 89% | 3383 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 54,665 psi | 86% | 3287 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 54,795 psi | 86% | 3356 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 55,390 psi | 87% | 3383 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 57,000 psi | 89% | 3438 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,334 psi | 90% | 3337 fps | 97.3% |
| Bofors RP15 | <<locked>> | 92% | 55,999 psi | 88% | 3366 fps | 99.7% |
| Bofors RP30 | <<locked>> | 96% | 54,621 psi | 86% | 3363 fps | 99.3% |
| Bofors RP5 | <<locked>> | 90% | 56,811 psi | 89% | 3383 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 96% | 56,637 psi | 89% | 3379 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 88% | 55,782 psi | 87% | 3314 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 54,766 psi | 86% | 3297 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 54,723 psi | 86% | 3228 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,624 psi | 90% | 3510 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,492 psi | 59% | 2169 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,811 psi | 89% | 3294 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,377 psi | 90% | 3301 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,362 psi | 88% | 3294 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 90% | 54,737 psi | 86% | 3363 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,791 psi | 76% | 3264 fps | 98.4% |
| Lovex S065 | <<locked>> | 82% | 57,014 psi | 89% | 3271 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,448 psi | 87% | 3271 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 54,737 psi | 86% | 3248 fps | 100% |
| Norma 204 | <<locked>> | 82% | 54,404 psi | 85% | 3291 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 49,661 psi | 78% | 3301 fps | 99.8% |
| Norma MRP | <<locked>> | 88% | 57,014 psi | 89% | 3406 fps | 100% |
| Norma URP | <<locked>> | 82% | 55,288 psi | 87% | 3291 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 55,709 psi | 87% | 3389 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 82% | 54,360 psi | 85% | 3294 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 54,317 psi | 85% | 3307 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,363 psi | 60% | 2218 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,450 psi | 90% | 3333 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,028 psi | 88% | 3363 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 54,708 psi | 86% | 3428 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 54,157 psi | 85% | 3376 fps | 98.4% |
| Rottweil R 904 | <<locked>> | 86% | 55,114 psi | 86% | 3281 fps | 99% |
| Rottweil R 905 | <<locked>> | 88% | 57,305 psi | 90% | 3356 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,014 psi | 89% | 3271 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,448 psi | 87% | 3271 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,086 psi | 88% | 3219 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,884 psi | 89% | 3350 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 56,739 psi | 89% | 3268 fps | 98.8% |
| Somchem S365 | <<locked>> | 84% | 56,521 psi | 89% | 3294 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 54,128 psi | 85% | 3261 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 82% | 56,826 psi | 89% | 3281 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,653 psi | 90% | 3301 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 56,188 psi | 88% | 3284 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,695 psi | 89% | 3323 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,521 psi | 89% | 3402 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 94% | 57,203 psi | 90% | 3383 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 96% | 54,650 psi | 86% | 3383 fps | 98% |
| Vihtavuori N570 | <<locked>> | 98% | 55,825 psi | 87% | 3445 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,608 psi | 89% | 3222 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 54,056 psi | 85% | 3376 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 53,925 psi | 85% | 3251 fps | 99.5% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 40,408 psi | 63% | 2969 fps | 99% |
| Accurate 4350 | <<locked>> | 80% | 53,359 psi | 84% | 3251 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 44,179 psi | 69% | 3163 fps | 96.9% |
| Accurate MAGPRO | <<locked>> | 82% | 44,918 psi | 70% | 3163 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 44,338 psi | 69% | 3114 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 80% | 39,639 psi | 62% | 3031 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 88% | 38,827 psi | 61% | 3002 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 86% | 33,083 psi | 52% | 2887 fps | 96.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,792 psi | 80% | 3251 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,338 psi | 69% | 3107 fps | 97.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,248 psi | 63% | 3041 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,943 psi | 61% | 2992 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,692 psi | 53% | 2900 fps | 98% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,005 psi | 69% | 3166 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 48,907 psi | 77% | 3281 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 50,444 psi | 79% | 3205 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 37,478 psi | 59% | 2969 fps | 95.7% |
| Bofors RP30 | <<locked>> | 86% | 38,653 psi | 61% | 3018 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 40,248 psi | 63% | 3041 fps | 96.9% |
| Hodgdon H1000 | <<locked>> | 84% | 36,854 psi | 58% | 2953 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 80% | 42,264 psi | 66% | 3041 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,481 psi | 65% | 3018 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,950 psi | 75% | 3117 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 82% | 35,244 psi | 55% | 2999 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,007 psi | 44% | 1946 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,024 psi | 78% | 3173 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 50,343 psi | 79% | 3182 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,555 psi | 68% | 3038 fps | 96.1% |
| IMR 7828 SSC | <<locked>> | 82% | 41,176 psi | 65% | 3081 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 94% | 39,624 psi | 62% | 3061 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 53,505 psi | 84% | 3215 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,025 psi | 82% | 3212 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 34,650 psi | 54% | 2825 fps | 97.5% |
| Norma 204 | <<locked>> | 80% | 50,778 psi | 80% | 3225 fps | 99% |
| Norma 217 | <<locked>> | 88% | 32,329 psi | 51% | 2881 fps | 95% |
| Norma MRP | <<locked>> | 80% | 42,757 psi | 67% | 3123 fps | 98.7% |
| Norma URP | <<locked>> | 80% | 51,750 psi | 81% | 3228 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,232 psi | 60% | 3015 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 50,807 psi | 80% | 3232 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,316 psi | 54% | 2874 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,718 psi | 45% | 1991 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,519 psi | 84% | 3268 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,025 psi | 82% | 3294 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 32,169 psi | 50% | 2887 fps | 95.5% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 42,786 psi | 67% | 3143 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 45,281 psi | 71% | 3087 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 80% | 43,787 psi | 69% | 3094 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,505 psi | 84% | 3215 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,025 psi | 82% | 3212 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,562 psi | 82% | 3159 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,453 psi | 68% | 3087 fps | 97.8% |
| Somchem S361 | <<locked>> | 80% | 46,340 psi | 73% | 3071 fps | 96.8% |
| Somchem S365 | <<locked>> | 80% | 49,356 psi | 77% | 3176 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,266 psi | 69% | 3068 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 80% | 53,243 psi | 83% | 3222 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,609 psi | 61% | 2923 fps | 97% |
| Vihtavuori N550 | <<locked>> | 80% | 52,562 psi | 82% | 3222 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,381 psi | 68% | 3081 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,583 psi | 67% | 3114 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 84% | 40,495 psi | 63% | 3038 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 90% | 43,888 psi | 69% | 3159 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 96% | 51,909 psi | 81% | 3369 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,765 psi | 83% | 3166 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,448 psi | 57% | 3035 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,727 psi | 64% | 2982 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 | Nosler RDF. Hodgdon Retumbo delivers the highest muzzle velocity at 3,510 fps; across all powders the maximum-charge window runs from 2,169 fps to 3,510 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 1:11.0 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.