Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 190gr | Nosler AccuBond Long Range 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>> | 84% | 54,172 psi | 85% | 2933 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 49,356 psi | 77% | 2963 fps | 97.2% |
| Accurate High Country | <<locked>> | 82% | 56,159 psi | 88% | 3100 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 57,014 psi | 89% | 3107 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 82% | 55,158 psi | 86% | 3025 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 57,740 psi | 90% | 3104 fps | 100% |
| ADI AR 2217 | <<locked>> | 94% | 56,956 psi | 89% | 3084 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 57,508 psi | 90% | 3222 fps | 99.4% |
| ADI AR 2225 | <<locked>> | 96% | 56,405 psi | 88% | 3107 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 54,679 psi | 86% | 3009 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 54,331 psi | 85% | 3035 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 56,449 psi | 88% | 2992 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 57,130 psi | 90% | 3074 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 57,203 psi | 90% | 3084 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 55,303 psi | 87% | 3123 fps | 98.8% |
| Alliant Reloder-50 | <<locked>> | 98% | 55,463 psi | 87% | 3120 fps | 98.5% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 54,215 psi | 85% | 3002 fps | 98.7% |
| Bofors RP15 | <<locked>> | 88% | 57,595 psi | 90% | 3084 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 56,884 psi | 89% | 3097 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 54,331 psi | 85% | 3035 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 54,418 psi | 85% | 3041 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 56,260 psi | 88% | 3028 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 84% | 55,245 psi | 87% | 3012 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 90% | 56,739 psi | 89% | 3173 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,014 psi | 60% | 1952 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,420 psi | 88% | 3005 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 86% | 56,144 psi | 88% | 3084 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 55,056 psi | 86% | 2953 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 55,405 psi | 87% | 3091 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 56,347 psi | 88% | 2966 fps | 100% |
| Norma 217 | <<locked>> | 98% | 56,826 psi | 89% | 3114 fps | 100% |
| Norma MRP | <<locked>> | 82% | 54,549 psi | 85% | 3048 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 57,682 psi | 90% | 3110 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 56,115 psi | 88% | 3035 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,015 psi | 61% | 1998 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 57,435 psi | 90% | 3156 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 56,652 psi | 89% | 3127 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 82% | 55,492 psi | 87% | 2992 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 54,650 psi | 86% | 3005 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 51,358 psi | 80% | 2976 fps | 97.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 54,288 psi | 85% | 3002 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,710 psi | 89% | 2979 fps | 99.9% |
| Somchem S385 | <<locked>> | 82% | 54,839 psi | 86% | 2969 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 54,897 psi | 86% | 2959 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 54,201 psi | 85% | 2989 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 82% | 54,578 psi | 86% | 2969 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 57,638 psi | 90% | 3117 fps | 100% |
| Vihtavuori N565 | <<locked>> | 88% | 55,114 psi | 86% | 3051 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 92% | 56,956 psi | 89% | 3127 fps | 99.7% |
| Vihtavuori N570 | <<locked>> | 92% | 54,505 psi | 85% | 3130 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 86% | 57,334 psi | 90% | 3087 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 54,491 psi | 85% | 2966 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 47,514 psi | 74% | 2825 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 42,569 psi | 67% | 2825 fps | 95.2% |
| Accurate High Country | <<locked>> | 80% | 52,402 psi | 82% | 3035 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 80% | 49,588 psi | 78% | 2976 fps | 99% |
| ADI AR 2209 | <<locked>> | 80% | 51,547 psi | 81% | 2963 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 46,804 psi | 73% | 2913 fps | 99.3% |
| ADI AR 2217 | <<locked>> | 80% | 34,954 psi | 55% | 2648 fps | 96.8% |
| ADI AR 2218 | <<locked>> | 90% | 42,830 psi | 67% | 2920 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 32,256 psi | 51% | 2621 fps | 98.6% |
| Alliant Reloder-19 | <<locked>> | 80% | 51,372 psi | 81% | 2956 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 47,558 psi | 75% | 2913 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 46,253 psi | 72% | 2835 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 40,524 psi | 64% | 2789 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 53,084 psi | 83% | 3022 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 41,002 psi | 64% | 2841 fps | 95.2% |
| Alliant Reloder-50 | <<locked>> | 92% | 44,266 psi | 69% | 2904 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,512 psi | 70% | 2818 fps | 96.7% |
| Bofors RP15 | <<locked>> | 80% | 44,309 psi | 69% | 2851 fps | 99.5% |
| Bofors RP30 | <<locked>> | 80% | 37,913 psi | 59% | 2730 fps | 97.8% |
| Bofors RP5 | <<locked>> | 80% | 47,558 psi | 75% | 2913 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 38,043 psi | 60% | 2726 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 80% | 49,226 psi | 77% | 2907 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 48,312 psi | 76% | 2890 fps | 99.1% |
| Hodgdon Retumbo | <<locked>> | 80% | 39,552 psi | 62% | 2848 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,558 psi | 45% | 1745 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,792 psi | 78% | 2890 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 80% | 45,571 psi | 71% | 2894 fps | 99.1% |
| IMR 7977 Enduron | <<locked>> | 88% | 51,735 psi | 81% | 2894 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 82% | 32,039 psi | 50% | 2598 fps | 95.4% |
| Lovex S071 | <<locked>> | 80% | 40,988 psi | 64% | 2700 fps | 100% |
| Norma 217 | <<locked>> | 80% | 30,182 psi | 47% | 2562 fps | 96.9% |
| Norma MRP | <<locked>> | 80% | 50,850 psi | 80% | 2989 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 46,224 psi | 72% | 2913 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 80% | 41,626 psi | 65% | 2782 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,269 psi | 46% | 1788 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 39,059 psi | 61% | 2822 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 35,998 psi | 56% | 2710 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 51,953 psi | 81% | 2930 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 80% | 51,126 psi | 80% | 2946 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 44,715 psi | 70% | 2848 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 50,778 psi | 80% | 2943 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 53,127 psi | 83% | 2923 fps | 99.6% |
| Somchem S385 | <<locked>> | 80% | 51,387 psi | 81% | 2913 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,179 psi | 71% | 2795 fps | 99.8% |
| Vihtavuori N170 | <<locked>> | 86% | 47,355 psi | 74% | 2861 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 80% | 51,097 psi | 80% | 2913 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 50,299 psi | 79% | 2989 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 80% | 42,003 psi | 66% | 2802 fps | 98.2% |
| Vihtavuori N568 | <<locked>> | 80% | 37,057 psi | 58% | 2726 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 86% | 43,859 psi | 69% | 2920 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 45,803 psi | 72% | 2910 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 47,645 psi | 75% | 2851 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 | 190gr | Nosler AccuBond Long Range. ADI AR 2218 delivers the highest muzzle velocity at 3,222 fps; across all powders the maximum-charge window runs from 1,952 fps to 3,222 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 190.0 gr projectile in 0.308" calls for a 1:11.0 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, Vihtavuori 20N29 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.