Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 180gr | CutEdge LZR bullet and 52 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>> | 88% | 57,566 psi | 90% | 3058 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 55,796 psi | 87% | 3169 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 86% | 56,811 psi | 89% | 3176 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 84% | 55,187 psi | 86% | 3097 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 57,638 psi | 90% | 3176 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 96% | 56,420 psi | 88% | 3150 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 57,014 psi | 89% | 3281 fps | 98.9% |
| ADI AR 2225 | <<locked>> | 98% | 55,376 psi | 87% | 3169 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 54,781 psi | 86% | 3084 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 54,128 psi | 85% | 3104 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 55,999 psi | 88% | 3064 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 56,550 psi | 89% | 3143 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,753 psi | 89% | 3156 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 54,491 psi | 85% | 3179 fps | 98.2% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 54,070 psi | 85% | 3163 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 54,476 psi | 85% | 3071 fps | 98.3% |
| Bofors RP15 | <<locked>> | 90% | 57,261 psi | 90% | 3156 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 56,217 psi | 88% | 3163 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 54,128 psi | 85% | 3104 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 53,998 psi | 85% | 3110 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 56,463 psi | 88% | 3100 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,448 psi | 87% | 3084 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,361 psi | 87% | 2995 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 55,840 psi | 88% | 3238 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,724 psi | 59% | 1995 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,232 psi | 90% | 3068 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,826 psi | 89% | 3081 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 88% | 56,028 psi | 88% | 3156 fps | 99.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 54,317 psi | 85% | 3146 fps | 99.9% |
| Lovex S071 | <<locked>> | 92% | 55,608 psi | 87% | 3031 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 55,564 psi | 87% | 3169 fps | 100% |
| Norma MRP | <<locked>> | 84% | 54,172 psi | 85% | 3120 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,377 psi | 90% | 3182 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 55,738 psi | 87% | 3100 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,667 psi | 61% | 2041 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 56,637 psi | 89% | 3222 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 55,869 psi | 88% | 3186 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 84% | 55,622 psi | 87% | 3064 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 84% | 54,476 psi | 85% | 3077 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 54,099 psi | 85% | 3071 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 57,101 psi | 89% | 3058 fps | 99.7% |
| Somchem S365 | <<locked>> | 82% | 57,421 psi | 90% | 3058 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 54,723 psi | 86% | 3041 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 54,882 psi | 86% | 3031 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,682 psi | 90% | 3114 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 86% | 57,740 psi | 90% | 3094 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,624 psi | 90% | 3192 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 90% | 54,563 psi | 86% | 3114 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 94% | 56,333 psi | 88% | 3189 fps | 99.4% |
| Vihtavuori N570 | <<locked>> | 96% | 57,711 psi | 90% | 3258 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 88% | 56,333 psi | 88% | 3156 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 54,592 psi | 86% | 3041 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 43,729 psi | 69% | 2828 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 48,298 psi | 76% | 3031 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 80% | 45,658 psi | 72% | 2969 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 80% | 48,182 psi | 76% | 2972 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 43,323 psi | 68% | 2910 fps | 98.2% |
| ADI AR 2217 | <<locked>> | 82% | 34,432 psi | 54% | 2694 fps | 95.8% |
| ADI AR 2218 | <<locked>> | 94% | 45,513 psi | 71% | 3045 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 29,298 psi | 46% | 2589 fps | 96.6% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,037 psi | 75% | 2966 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,005 psi | 69% | 2913 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,772 psi | 67% | 2848 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,985 psi | 58% | 2782 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,718 psi | 76% | 3028 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 43,221 psi | 68% | 2956 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 96% | 46,325 psi | 73% | 3012 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 41,829 psi | 66% | 2818 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 40,886 psi | 64% | 2844 fps | 98.5% |
| Bofors RP30 | <<locked>> | 80% | 34,403 psi | 54% | 2707 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 44,005 psi | 69% | 2913 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 80% | 34,925 psi | 55% | 2710 fps | 96.7% |
| Hodgdon H4831 | <<locked>> | 80% | 45,948 psi | 72% | 2910 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,063 psi | 71% | 2894 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,822 psi | 81% | 2943 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 36,042 psi | 56% | 2825 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,210 psi | 44% | 1785 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,766 psi | 84% | 3012 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,833 psi | 73% | 2900 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 80% | 42,032 psi | 66% | 2890 fps | 98% |
| IMR 8133 Enduron | <<locked>> | 86% | 33,098 psi | 52% | 2690 fps | 95.1% |
| Lovex S071 | <<locked>> | 80% | 37,449 psi | 59% | 2694 fps | 99.5% |
| Norma 217 | <<locked>> | 82% | 28,935 psi | 45% | 2589 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 46,804 psi | 73% | 2989 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 42,279 psi | 66% | 2907 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 80% | 37,942 psi | 59% | 2769 fps | 98.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,979 psi | 45% | 1827 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 35,418 psi | 56% | 2799 fps | 99% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 37,840 psi | 59% | 2822 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 48,762 psi | 76% | 2943 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 80% | 47,572 psi | 75% | 2953 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,239 psi | 74% | 2949 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 49,777 psi | 78% | 2930 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 53,780 psi | 84% | 3005 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,892 psi | 75% | 2923 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 41,916 psi | 66% | 2795 fps | 99.2% |
| Vihtavuori N170 | <<locked>> | 90% | 50,314 psi | 79% | 2986 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 47,166 psi | 74% | 2927 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,470 psi | 73% | 2986 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 80% | 38,392 psi | 60% | 2789 fps | 96.6% |
| Vihtavuori N568 | <<locked>> | 84% | 39,015 psi | 61% | 2841 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 90% | 46,267 psi | 73% | 3041 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,263 psi | 65% | 2907 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,135 psi | 69% | 2851 fps | 99.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 60 powders for .30-378 Weath. Mag. loaded with the .308 | 180gr | CutEdge LZR. ADI AR 2218 delivers the highest muzzle velocity at 3,281 fps; across all powders the maximum-charge window runs from 1,995 fps to 3,281 fps. Accurate 8700 gives the best case fill at 100 %, and 60 of the 60 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 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2218, Alliant Reloder-50 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 US 869, Lovex D100, Ramshot LRT 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.