Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 180gr | CutEdge DGSC 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.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 86% | 56,753 psi | 89% | 3048 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 48,602 psi | 76% | 3009 fps | 96.6% |
| Accurate High Country | <<locked>> | 82% | 55,100 psi | 86% | 3153 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 84% | 56,159 psi | 88% | 3166 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 54,433 psi | 85% | 3087 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 56,927 psi | 89% | 3163 fps | 100% |
| ADI AR 2217 | <<locked>> | 94% | 56,173 psi | 88% | 3143 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 56,840 psi | 89% | 3278 fps | 99.1% |
| ADI AR 2225 | <<locked>> | 96% | 55,651 psi | 87% | 3166 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 54,070 psi | 85% | 3074 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 57,305 psi | 90% | 3156 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 55,521 psi | 87% | 3054 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 56,362 psi | 88% | 3133 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 56,188 psi | 88% | 3140 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 54,491 psi | 85% | 3176 fps | 98.4% |
| Alliant Reloder-50 | <<locked>> | 98% | 54,302 psi | 85% | 3159 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 57,261 psi | 90% | 3120 fps | 98.9% |
| Bofors RP15 | <<locked>> | 88% | 56,652 psi | 89% | 3143 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 55,985 psi | 88% | 3153 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 57,305 psi | 90% | 3156 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 53,606 psi | 84% | 3100 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 55,564 psi | 87% | 3091 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 54,607 psi | 86% | 3074 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 90% | 55,869 psi | 88% | 3232 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,811 psi | 59% | 2014 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 55,767 psi | 87% | 3068 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 86% | 55,506 psi | 87% | 3146 fps | 99.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 54,534 psi | 85% | 3143 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 55,085 psi | 86% | 3022 fps | 100% |
| Norma 217 | <<locked>> | 98% | 55,869 psi | 88% | 3166 fps | 100% |
| Norma MRP | <<locked>> | 84% | 57,479 psi | 90% | 3169 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 56,927 psi | 89% | 3173 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 55,216 psi | 87% | 3091 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,870 psi | 61% | 2060 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 56,753 psi | 89% | 3212 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 55,811 psi | 87% | 3182 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 54,650 psi | 86% | 3051 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 84% | 57,450 psi | 90% | 3123 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 50,531 psi | 79% | 3022 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 57,072 psi | 89% | 3120 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,028 psi | 88% | 3041 fps | 99.7% |
| Somchem S385 | <<locked>> | 84% | 57,653 psi | 90% | 3087 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 54,070 psi | 85% | 3018 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 57,174 psi | 90% | 3107 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 84% | 57,116 psi | 90% | 3081 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 56,855 psi | 89% | 3176 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 54,244 psi | 85% | 3107 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 92% | 56,217 psi | 88% | 3186 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 94% | 57,711 psi | 90% | 3255 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 86% | 56,405 psi | 88% | 3150 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 57,667 psi | 90% | 3087 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 46,282 psi | 73% | 2874 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 45,034 psi | 71% | 2940 fps | 95.6% |
| Accurate High Country | <<locked>> | 80% | 51,430 psi | 81% | 3091 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 80% | 48,573 psi | 76% | 3025 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 80% | 50,821 psi | 80% | 3022 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 46,050 psi | 72% | 2966 fps | 98.9% |
| ADI AR 2217 | <<locked>> | 80% | 34,098 psi | 53% | 2684 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 92% | 45,252 psi | 71% | 3035 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 80% | 31,372 psi | 49% | 2648 fps | 97.8% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,589 psi | 79% | 3012 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,702 psi | 73% | 2966 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,382 psi | 71% | 2890 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,595 psi | 62% | 2835 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 52,040 psi | 82% | 3077 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 43,352 psi | 68% | 2953 fps | 95.5% |
| Alliant Reloder-50 | <<locked>> | 94% | 46,615 psi | 73% | 3009 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,976 psi | 69% | 2871 fps | 96.1% |
| Bofors RP15 | <<locked>> | 80% | 43,395 psi | 68% | 2897 fps | 99.1% |
| Bofors RP30 | <<locked>> | 80% | 36,811 psi | 58% | 2766 fps | 97% |
| Bofors RP5 | <<locked>> | 80% | 46,702 psi | 73% | 2966 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 80% | 37,217 psi | 58% | 2769 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 80% | 48,486 psi | 76% | 2963 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,587 psi | 75% | 2946 fps | 98.7% |
| Hodgdon Retumbo | <<locked>> | 80% | 38,682 psi | 61% | 2890 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,384 psi | 44% | 1804 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,081 psi | 77% | 2949 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 80% | 44,817 psi | 70% | 2949 fps | 98.8% |
| IMR 8133 Enduron | <<locked>> | 84% | 33,330 psi | 52% | 2687 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 39,726 psi | 62% | 2743 fps | 99.8% |
| Norma 217 | <<locked>> | 80% | 29,066 psi | 46% | 2579 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 49,937 psi | 78% | 3041 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 45,324 psi | 71% | 2963 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 80% | 40,712 psi | 64% | 2825 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,153 psi | 46% | 1847 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 38,043 psi | 60% | 2858 fps | 99.6% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 37,753 psi | 59% | 2808 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 51,256 psi | 80% | 2992 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 50,241 psi | 79% | 3002 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 46,978 psi | 74% | 2953 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,893 psi | 78% | 2999 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 52,257 psi | 82% | 2979 fps | 99.4% |
| Somchem S385 | <<locked>> | 80% | 50,502 psi | 79% | 2972 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 44,251 psi | 69% | 2844 fps | 99.6% |
| Vihtavuori N170 | <<locked>> | 88% | 49,777 psi | 78% | 2976 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 80% | 50,038 psi | 78% | 2969 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,443 psi | 77% | 3041 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 80% | 41,031 psi | 64% | 2844 fps | 97.6% |
| Vihtavuori N568 | <<locked>> | 82% | 38,943 psi | 61% | 2835 fps | 95.6% |
| Vihtavuori N570 | <<locked>> | 88% | 46,238 psi | 72% | 3031 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 44,773 psi | 70% | 2959 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,775 psi | 73% | 2904 fps | 99.6% |
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 | 180gr | CutEdge DGSC. ADI AR 2218 delivers the highest muzzle velocity at 3,278 fps; across all powders the maximum-charge window runs from 2,014 fps to 3,278 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 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, 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.