Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 180gr | Remington PSP Core-Lokt bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Vihtavuori N570 and Hodgdon Retumbo.
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>> | 84% | 54,665 psi | 86% | 3012 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 50,038 psi | 78% | 3035 fps | 97% |
| Accurate High Country | <<locked>> | 82% | 56,565 psi | 89% | 3176 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 57,479 psi | 90% | 3186 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 82% | 55,477 psi | 87% | 3100 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 54,201 psi | 85% | 3117 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 94% | 57,537 psi | 90% | 3163 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 54,056 psi | 85% | 3222 fps | 98.6% |
| ADI AR 2225 | <<locked>> | 96% | 57,000 psi | 89% | 3182 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 55,666 psi | 87% | 3097 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,100 psi | 86% | 3087 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 54,795 psi | 86% | 3110 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 56,797 psi | 89% | 3068 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 57,638 psi | 90% | 3150 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 57,682 psi | 90% | 3159 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 56,173 psi | 88% | 3199 fps | 98.7% |
| Alliant Reloder-50 | <<locked>> | 98% | 56,260 psi | 88% | 3192 fps | 98.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 54,549 psi | 85% | 3074 fps | 98.5% |
| Bofors RP15 | <<locked>> | 86% | 54,346 psi | 85% | 3104 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 57,377 psi | 90% | 3173 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 54,795 psi | 86% | 3110 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 54,969 psi | 86% | 3120 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 56,652 psi | 89% | 3104 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 55,680 psi | 87% | 3087 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 90% | 57,217 psi | 90% | 3248 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,927 psi | 59% | 2014 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,739 psi | 89% | 3081 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 86% | 56,695 psi | 89% | 3166 fps | 100% |
| IMR 8133 Enduron | <<locked>> | 98% | 55,985 psi | 88% | 3166 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 56,608 psi | 89% | 3041 fps | 100% |
| Norma 217 | <<locked>> | 98% | 57,435 psi | 90% | 3189 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,013 psi | 86% | 3127 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,070 psi | 85% | 3123 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 56,579 psi | 89% | 3107 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,015 psi | 61% | 2064 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 53,838 psi | 84% | 3166 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 57,406 psi | 90% | 3205 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 82% | 55,651 psi | 87% | 3064 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 54,984 psi | 86% | 3081 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 51,938 psi | 81% | 3045 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 54,621 psi | 86% | 3077 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 57,101 psi | 89% | 3058 fps | 99.8% |
| Somchem S385 | <<locked>> | 82% | 55,201 psi | 87% | 3045 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 55,376 psi | 87% | 3035 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 54,650 psi | 86% | 3061 fps | 97% |
| Vihtavuori N555 | <<locked>> | 82% | 54,839 psi | 86% | 3045 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 54,331 psi | 85% | 3130 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 88% | 55,695 psi | 87% | 3127 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 92% | 57,638 psi | 90% | 3202 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 92% | 55,071 psi | 86% | 3205 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 84% | 53,795 psi | 84% | 3107 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,042 psi | 86% | 3045 fps | 100% |
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% | 47,790 psi | 75% | 2897 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 46,427 psi | 73% | 2963 fps | 96% |
| Accurate High Country | <<locked>> | 80% | 52,779 psi | 83% | 3110 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 80% | 50,024 psi | 78% | 3051 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 80% | 51,866 psi | 81% | 3038 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 47,137 psi | 74% | 2982 fps | 99.1% |
| ADI AR 2217 | <<locked>> | 80% | 35,215 psi | 55% | 2710 fps | 96.4% |
| ADI AR 2218 | 109.9 gr | 90% | 43,265 psi | 68% | 2989 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 80% | 32,561 psi | 51% | 2680 fps | 98.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 52,127 psi | 82% | 3035 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 51,634 psi | 81% | 3028 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 47,935 psi | 75% | 2989 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 46,659 psi | 73% | 2907 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 40,843 psi | 64% | 2858 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 53,664 psi | 84% | 3097 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 44,802 psi | 70% | 2979 fps | 96% |
| Alliant Reloder-50 | <<locked>> | 92% | 44,889 psi | 70% | 2969 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,875 psi | 70% | 2887 fps | 96.4% |
| Bofors RP15 | <<locked>> | 80% | 44,585 psi | 70% | 2920 fps | 99.3% |
| Bofors RP30 | <<locked>> | 80% | 38,145 psi | 60% | 2792 fps | 97.5% |
| Bofors RP5 | <<locked>> | 80% | 47,935 psi | 75% | 2989 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 80% | 38,363 psi | 60% | 2795 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 80% | 49,530 psi | 78% | 2979 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 48,660 psi | 76% | 2963 fps | 98.9% |
| Hodgdon Retumbo | 92.2 gr | 80% | 39,929 psi | 63% | 2917 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,529 psi | 45% | 1804 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,038 psi | 78% | 2963 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 80% | 45,948 psi | 72% | 2969 fps | 99% |
| IMR 8133 Enduron | <<locked>> | 84% | 34,693 psi | 54% | 2723 fps | 96% |
| Lovex S071 | <<locked>> | 80% | 41,191 psi | 65% | 2769 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 30,472 psi | 48% | 2621 fps | 96.5% |
| Norma MRP | <<locked>> | 80% | 51,227 psi | 80% | 3061 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 46,615 psi | 73% | 2986 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 80% | 42,047 psi | 66% | 2851 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,312 psi | 46% | 1847 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 39,523 psi | 62% | 2890 fps | 99.8% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 36,405 psi | 57% | 2772 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 52,272 psi | 82% | 3005 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 80% | 51,416 psi | 81% | 3018 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 45,223 psi | 71% | 2913 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,068 psi | 80% | 3015 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 53,476 psi | 84% | 2995 fps | 99.5% |
| Somchem S385 | <<locked>> | 80% | 51,750 psi | 81% | 2989 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,397 psi | 71% | 2861 fps | 99.7% |
| Vihtavuori N170 | <<locked>> | 86% | 47,732 psi | 75% | 2930 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 51,445 psi | 81% | 2989 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 50,662 psi | 79% | 3064 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 80% | 42,424 psi | 66% | 2871 fps | 98% |
| Vihtavuori N568 | <<locked>> | 80% | 37,463 psi | 59% | 2792 fps | 95% |
| Vihtavuori N570 | 102.8 gr | 86% | 44,309 psi | 69% | 2989 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 46,325 psi | 73% | 2986 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 47,906 psi | 75% | 2920 fps | 99.7% |
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 52 powders for .30-378 Weath. Mag. loaded with the .308 | 180gr | Remington PSP Core-Lokt. Hodgdon Retumbo delivers the highest muzzle velocity at 3,248 fps; across all powders the maximum-charge window runs from 2,014 fps to 3,248 fps. Accurate 8700 gives the best case fill at 100 %, and 52 of the 52 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 180.0 gr projectile in 0.308" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, ReloadSwiss RS 14 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. ADI AR 2218, Vihtavuori N570, Hodgdon Retumbo rank at the top here: for .30-378 Weath. Mag. with the .308 | 180gr | Remington PSP Core-Lokt 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.