Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 180gr | Nosler AccuBond bullet and 53 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo and ADI AR 2218.
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% | 56,579 psi | 89% | 3041 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 47,761 psi | 75% | 2992 fps | 96.2% |
| Accurate High Country | <<locked>> | 82% | 54,621 psi | 86% | 3146 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 84% | 55,666 psi | 87% | 3153 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 84% | 57,595 psi | 90% | 3133 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 56,333 psi | 88% | 3150 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 94% | 55,405 psi | 87% | 3130 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 55,898 psi | 88% | 3255 fps | 98.8% |
| ADI AR 2225 | <<locked>> | 96% | 54,636 psi | 86% | 3153 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 57,740 psi | 90% | 3127 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 57,130 psi | 90% | 3120 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,855 psi | 89% | 3143 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,955 psi | 86% | 3045 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 55,506 psi | 87% | 3123 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 55,637 psi | 87% | 3133 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 53,737 psi | 84% | 3159 fps | 98.2% |
| Alliant Reloder-50 | <<locked>> | 98% | 53,751 psi | 84% | 3150 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,623 psi | 89% | 3107 fps | 98.7% |
| Bofors RP15 | <<locked>> | 88% | 56,231 psi | 88% | 3133 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 55,434 psi | 87% | 3143 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 56,855 psi | 89% | 3143 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 56,840 psi | 89% | 3150 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 55,042 psi | 86% | 3077 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 84% | 54,085 psi | 85% | 3061 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 90% | 54,868 psi | 86% | 3215 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,869 psi | 59% | 2005 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 55,390 psi | 87% | 3054 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 86% | 54,737 psi | 86% | 3133 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 92% | 57,624 psi | 90% | 3061 fps | 95.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 57,522 psi | 90% | 3192 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 54,897 psi | 86% | 3015 fps | 100% |
| Norma 217 | <<locked>> | 98% | 55,071 psi | 86% | 3156 fps | 100% |
| Norma MRP | <<locked>> | 84% | 57,014 psi | 89% | 3159 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 56,014 psi | 88% | 3153 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 54,607 psi | 86% | 3081 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,841 psi | 61% | 2051 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 55,753 psi | 87% | 3202 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 55,013 psi | 86% | 3166 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 82% | 54,331 psi | 85% | 3041 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 84% | 57,029 psi | 89% | 3114 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 49,893 psi | 78% | 3009 fps | 96.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,637 psi | 89% | 3110 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,550 psi | 87% | 3028 fps | 99.6% |
| Somchem S385 | <<locked>> | 84% | 57,246 psi | 90% | 3077 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 57,246 psi | 90% | 3064 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 56,594 psi | 89% | 3091 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 84% | 56,840 psi | 89% | 3074 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 56,362 psi | 88% | 3166 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 90% | 57,566 psi | 90% | 3159 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 92% | 55,448 psi | 87% | 3169 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 94% | 56,898 psi | 89% | 3241 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 86% | 55,477 psi | 87% | 3136 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 57,101 psi | 89% | 3074 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% | 46,209 psi | 72% | 2871 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 44,396 psi | 70% | 2923 fps | 95.2% |
| Accurate High Country | <<locked>> | 80% | 50,981 psi | 80% | 3077 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 80% | 48,370 psi | 76% | 3018 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 80% | 50,401 psi | 79% | 3012 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 45,600 psi | 71% | 2953 fps | 98.8% |
| ADI AR 2217 | <<locked>> | 80% | 34,069 psi | 53% | 2680 fps | 95.8% |
| ADI AR 2218 | 109.1 gr | 92% | 44,773 psi | 70% | 3025 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 31,343 psi | 49% | 2648 fps | 97.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 50,575 psi | 79% | 3005 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,096 psi | 79% | 2999 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,369 psi | 73% | 2959 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,121 psi | 71% | 2884 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,363 psi | 62% | 2831 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 51,619 psi | 81% | 3071 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 42,830 psi | 67% | 2940 fps | 95.2% |
| Alliant Reloder-50 | <<locked>> | 94% | 46,151 psi | 72% | 3002 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,584 psi | 68% | 2858 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 43,207 psi | 68% | 2890 fps | 99.1% |
| Bofors RP30 | <<locked>> | 80% | 36,680 psi | 57% | 2759 fps | 96.9% |
| Bofors RP5 | <<locked>> | 80% | 46,369 psi | 73% | 2959 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 80% | 36,999 psi | 58% | 2759 fps | 97.6% |
| Hodgdon H4831 | <<locked>> | 80% | 48,066 psi | 75% | 2949 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,224 psi | 74% | 2933 fps | 98.6% |
| Hodgdon Retumbo | 89.5 gr | 80% | 38,377 psi | 60% | 2884 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,442 psi | 45% | 1795 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,791 psi | 76% | 2936 fps | 99% |
| IMR 7828 SSC | <<locked>> | 80% | 44,353 psi | 70% | 2936 fps | 98.6% |
| IMR 7977 Enduron | <<locked>> | 90% | 54,027 psi | 85% | 2999 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 84% | 33,301 psi | 52% | 2687 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 39,914 psi | 63% | 2743 fps | 99.8% |
| Norma 217 | <<locked>> | 80% | 29,182 psi | 46% | 2589 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 49,443 psi | 77% | 3031 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 44,788 psi | 70% | 2953 fps | 99% |
| Ramshot Magnum | <<locked>> | 80% | 40,451 psi | 63% | 2818 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,254 psi | 46% | 1837 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 37,855 psi | 59% | 2858 fps | 99.6% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 37,579 psi | 59% | 2808 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 50,908 psi | 80% | 2979 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 80% | 49,951 psi | 78% | 2992 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 46,470 psi | 73% | 2940 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,603 psi | 78% | 2989 fps | 99.8% |
| Somchem S361 | <<locked>> | 80% | 51,924 psi | 81% | 2966 fps | 99.3% |
| Somchem S385 | <<locked>> | 80% | 50,227 psi | 79% | 2963 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 43,990 psi | 69% | 2835 fps | 99.5% |
| Vihtavuori N170 | <<locked>> | 88% | 49,501 psi | 78% | 2963 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 80% | 49,879 psi | 78% | 2966 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,950 psi | 77% | 3031 fps | 99% |
| Vihtavuori N565 | <<locked>> | 80% | 40,959 psi | 64% | 2841 fps | 97.5% |
| Vihtavuori N568 | <<locked>> | 82% | 38,667 psi | 61% | 2828 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 88% | 45,759 psi | 72% | 3025 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 44,208 psi | 69% | 2953 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,485 psi | 73% | 2894 fps | 99.6% |
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 53 powders for .30-378 Weath. Mag. loaded with the .308 | 180gr | Nosler AccuBond. ADI AR 2218 delivers the highest muzzle velocity at 3,255 fps; across all powders the maximum-charge window runs from 2,005 fps to 3,255 fps. Accurate 8700 gives the best case fill at 100 %, and 53 of the 53 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 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, IMR 8133 Enduron 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. Hodgdon 50BMG, Hodgdon Retumbo, ADI AR 2218 rank at the top here: for .30-378 Weath. Mag. with the .308 | 180gr | Nosler AccuBond 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.