Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 184gr | RWS Evolution bullet and 51 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 84% | 54,128 psi | 85% | 2972 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 49,284 psi | 77% | 2995 fps | 96.9% |
| Accurate High Country | <<locked>> | 82% | 56,072 psi | 88% | 3140 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 57,101 psi | 89% | 3150 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 82% | 55,027 psi | 86% | 3061 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 57,595 psi | 90% | 3143 fps | 100% |
| ADI AR 2217 | <<locked>> | 94% | 56,913 psi | 89% | 3123 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 57,551 psi | 90% | 3258 fps | 99.2% |
| ADI AR 2225 | <<locked>> | 96% | 56,405 psi | 88% | 3146 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 54,708 psi | 86% | 3051 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 54,447 psi | 85% | 3074 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 56,391 psi | 88% | 3035 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 57,029 psi | 89% | 3114 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 57,174 psi | 90% | 3123 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 55,448 psi | 87% | 3163 fps | 98.6% |
| Alliant Reloder-50 | <<locked>> | 98% | 55,521 psi | 87% | 3153 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 54,143 psi | 85% | 3038 fps | 98.5% |
| Bofors RP15 | <<locked>> | 88% | 57,609 psi | 90% | 3127 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 56,898 psi | 89% | 3136 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 54,447 psi | 85% | 3074 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 54,433 psi | 85% | 3081 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 56,347 psi | 88% | 3071 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 55,332 psi | 87% | 3054 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 90% | 56,594 psi | 89% | 3212 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,985 psi | 60% | 1988 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,376 psi | 88% | 3045 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 86% | 56,188 psi | 88% | 3127 fps | 100% |
| IMR 8133 Enduron | <<locked>> | 98% | 55,274 psi | 87% | 3130 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 56,231 psi | 88% | 3005 fps | 100% |
| Norma 217 | <<locked>> | 98% | 56,840 psi | 89% | 3153 fps | 100% |
| Norma MRP | <<locked>> | 82% | 54,462 psi | 85% | 3087 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 57,624 psi | 90% | 3150 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 56,130 psi | 88% | 3074 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,972 psi | 61% | 2034 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 57,493 psi | 90% | 3196 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 56,579 psi | 89% | 3166 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 82% | 55,376 psi | 87% | 3031 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 54,549 psi | 85% | 3045 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 51,372 psi | 81% | 3009 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 54,186 psi | 85% | 3041 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,724 psi | 89% | 3022 fps | 99.8% |
| Somchem S385 | <<locked>> | 82% | 54,810 psi | 86% | 3012 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 54,955 psi | 86% | 2999 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 54,331 psi | 85% | 3028 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 54,476 psi | 85% | 3009 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 57,624 psi | 90% | 3156 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 88% | 55,187 psi | 86% | 3094 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 92% | 57,145 psi | 90% | 3169 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 92% | 54,491 psi | 85% | 3166 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 86% | 57,276 psi | 90% | 3130 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 54,563 psi | 86% | 3009 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 47,442 psi | 74% | 2864 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 45,832 psi | 72% | 2927 fps | 95.9% |
| Accurate High Country | <<locked>> | 80% | 52,330 psi | 82% | 3074 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 80% | 49,530 psi | 78% | 3015 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 80% | 51,488 psi | 81% | 3002 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 46,717 psi | 73% | 2949 fps | 99.1% |
| ADI AR 2217 | <<locked>> | 80% | 34,940 psi | 55% | 2680 fps | 96.5% |
| ADI AR 2218 | <<locked>> | 90% | 42,728 psi | 67% | 2949 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 32,213 psi | 50% | 2648 fps | 98.3% |
| Alliant Reloder-19 | <<locked>> | 80% | 51,300 psi | 80% | 2992 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 47,471 psi | 74% | 2953 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 46,253 psi | 72% | 2874 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 40,466 psi | 63% | 2825 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 53,156 psi | 83% | 3061 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 44,266 psi | 69% | 2946 fps | 96% |
| Alliant Reloder-50 | <<locked>> | 92% | 44,309 psi | 69% | 2936 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,454 psi | 70% | 2851 fps | 96.4% |
| Bofors RP15 | <<locked>> | 80% | 44,251 psi | 69% | 2887 fps | 99.4% |
| Bofors RP30 | <<locked>> | 80% | 37,840 psi | 59% | 2762 fps | 97.5% |
| Bofors RP5 | <<locked>> | 80% | 47,471 psi | 74% | 2953 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 80% | 37,956 psi | 59% | 2759 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 80% | 49,139 psi | 77% | 2943 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 48,240 psi | 76% | 2927 fps | 98.9% |
| Hodgdon Retumbo | <<locked>> | 80% | 39,465 psi | 62% | 2881 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,500 psi | 45% | 1778 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,748 psi | 78% | 2927 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 80% | 45,498 psi | 71% | 2933 fps | 99% |
| IMR 8133 Enduron | <<locked>> | 82% | 31,981 psi | 50% | 2625 fps | 95% |
| Lovex S071 | <<locked>> | 80% | 40,915 psi | 64% | 2736 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 30,139 psi | 47% | 2589 fps | 96.5% |
| Norma MRP | <<locked>> | 80% | 50,821 psi | 80% | 3025 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 46,180 psi | 72% | 2949 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 80% | 41,568 psi | 65% | 2815 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,298 psi | 46% | 1821 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 39,102 psi | 61% | 2858 fps | 99.8% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 35,998 psi | 56% | 2743 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 51,938 psi | 81% | 2972 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 80% | 51,082 psi | 80% | 2986 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 44,701 psi | 70% | 2881 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 50,734 psi | 80% | 2982 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 53,026 psi | 83% | 2959 fps | 99.5% |
| Somchem S385 | <<locked>> | 80% | 51,314 psi | 80% | 2953 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,121 psi | 71% | 2831 fps | 99.8% |
| Vihtavuori N170 | <<locked>> | 86% | 47,413 psi | 74% | 2897 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 51,053 psi | 80% | 2956 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 50,270 psi | 79% | 3028 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 80% | 42,018 psi | 66% | 2838 fps | 98% |
| Vihtavuori N568 | <<locked>> | 80% | 37,014 psi | 58% | 2759 fps | 95% |
| Vihtavuori N570 | <<locked>> | 86% | 43,918 psi | 69% | 2956 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 45,774 psi | 72% | 2949 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 47,529 psi | 74% | 2887 fps | 99.8% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 59 powders for .30-378 Weath. Mag. loaded with the .308 | 184gr | RWS Evolution. ADI AR 2218 delivers the highest muzzle velocity at 3,258 fps; across all powders the maximum-charge window runs from 1,988 fps to 3,258 fps. Accurate 8700 gives the best case fill at 100 %, and 59 of the 59 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 184.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, Hodgdon US 869 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, Hodgdon 50BMG, Hodgdon US 869, 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.