Load Specifications
Load data in caliber .30-378 Weath. Mag. with .309 | 170gr | Reichenberg HDB Universal bullet and 53 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Alliant Reloder-33 and Hodgdon Retumbo.
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% | 57,537 psi | 90% | 3133 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 55,796 psi | 87% | 3245 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 86% | 56,753 psi | 89% | 3248 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 84% | 55,085 psi | 86% | 3173 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 57,566 psi | 90% | 3248 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 96% | 56,463 psi | 88% | 3225 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 57,232 psi | 90% | 3353 fps | 98.7% |
| ADI AR 2225 | <<locked>> | 98% | 55,593 psi | 87% | 3245 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 55,259 psi | 87% | 3169 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 54,694 psi | 86% | 3159 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 54,157 psi | 85% | 3179 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 55,956 psi | 88% | 3140 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 56,492 psi | 89% | 3219 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,753 psi | 89% | 3232 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 54,679 psi | 86% | 3251 fps | 97.9% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 54,201 psi | 85% | 3228 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 54,491 psi | 85% | 3143 fps | 98% |
| Bofors RP15 | <<locked>> | 90% | 57,188 psi | 90% | 3228 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 56,144 psi | 88% | 3232 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 54,157 psi | 85% | 3179 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 53,998 psi | 85% | 3182 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 56,478 psi | 89% | 3176 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,463 psi | 87% | 3159 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,390 psi | 87% | 3074 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 55,854 psi | 88% | 3314 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,666 psi | 59% | 2060 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,290 psi | 90% | 3146 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,782 psi | 89% | 3153 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 88% | 55,970 psi | 88% | 3232 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 54,404 psi | 85% | 3219 fps | 99.8% |
| Lovex S071 | <<locked>> | 92% | 55,492 psi | 87% | 3104 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 55,564 psi | 87% | 3241 fps | 100% |
| Norma MRP | <<locked>> | 84% | 54,172 psi | 85% | 3192 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,319 psi | 90% | 3255 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 90% | 55,796 psi | 87% | 3176 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,566 psi | 60% | 2106 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 56,826 psi | 89% | 3297 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 56,014 psi | 88% | 3258 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 84% | 55,593 psi | 87% | 3140 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 84% | 54,404 psi | 85% | 3150 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 54,027 psi | 85% | 3143 fps | 99.9% |
| Somchem S361 | <<locked>> | 84% | 57,000 psi | 89% | 3127 fps | 99.6% |
| Somchem S365 | <<locked>> | 82% | 57,493 psi | 90% | 3136 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 54,737 psi | 86% | 3117 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 54,839 psi | 86% | 3104 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 53,954 psi | 85% | 3117 fps | 96.2% |
| Vihtavuori N555 | <<locked>> | 86% | 57,580 psi | 90% | 3169 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,508 psi | 90% | 3264 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 90% | 54,592 psi | 86% | 3186 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 94% | 56,333 psi | 88% | 3261 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 94% | 53,766 psi | 84% | 3255 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 88% | 56,304 psi | 88% | 3232 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 54,578 psi | 86% | 3114 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% | 43,569 psi | 68% | 2894 fps | 99.9% |
| Accurate High Country | <<locked>> | 80% | 48,356 psi | 76% | 3104 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 80% | 45,643 psi | 72% | 3035 fps | 97.4% |
| ADI AR 2209 | <<locked>> | 80% | 48,022 psi | 75% | 3041 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 43,279 psi | 68% | 2976 fps | 97.8% |
| ADI AR 2217 | <<locked>> | 82% | 34,360 psi | 54% | 2753 fps | 95.1% |
| ADI AR 2218 | <<locked>> | 94% | 45,556 psi | 71% | 3107 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 80% | 29,254 psi | 46% | 2641 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 48,327 psi | 76% | 3041 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,877 psi | 75% | 3035 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,932 psi | 69% | 2979 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,685 psi | 67% | 2917 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,854 psi | 58% | 2841 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,631 psi | 76% | 3097 fps | 100% |
| Alliant Reloder-33 | 112.8 gr | 92% | 46,818 psi | 73% | 3094 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 96% | 46,499 psi | 73% | 3074 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 44,585 psi | 70% | 2946 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 40,756 psi | 64% | 2910 fps | 98.1% |
| Bofors RP30 | <<locked>> | 80% | 34,258 psi | 54% | 2762 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 43,932 psi | 69% | 2979 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 80% | 34,853 psi | 55% | 2769 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 80% | 45,818 psi | 72% | 2979 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,991 psi | 71% | 2963 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,808 psi | 81% | 3022 fps | 100% |
| Hodgdon Retumbo | 90.9 gr | 80% | 35,998 psi | 56% | 2887 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,253 psi | 44% | 1847 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,621 psi | 84% | 3084 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,688 psi | 73% | 2969 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 80% | 41,974 psi | 66% | 2956 fps | 97.6% |
| IMR 8133 Enduron | <<locked>> | 88% | 35,592 psi | 56% | 2815 fps | 95.6% |
| Lovex S071 | <<locked>> | 80% | 37,376 psi | 59% | 2756 fps | 99.2% |
| Norma 217 | <<locked>> | 84% | 31,053 psi | 49% | 2707 fps | 96% |
| Norma MRP | <<locked>> | 80% | 46,891 psi | 73% | 3061 fps | 99.9% |
| Ramshot Grand | <<locked>> | 80% | 42,235 psi | 66% | 2972 fps | 98% |
| Ramshot Magnum | <<locked>> | 80% | 37,811 psi | 59% | 2828 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,993 psi | 45% | 1890 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 35,346 psi | 55% | 2858 fps | 98.6% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 37,797 psi | 59% | 2877 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 48,675 psi | 76% | 3015 fps | 99% |
| Rottweil R 905 | <<locked>> | 80% | 47,413 psi | 74% | 3022 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,094 psi | 74% | 3015 fps | 99.4% |
| Somchem S361 | <<locked>> | 80% | 49,763 psi | 78% | 3002 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 53,606 psi | 84% | 3081 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,805 psi | 75% | 2992 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 80% | 41,742 psi | 65% | 2858 fps | 98.9% |
| Vihtavuori N170 | <<locked>> | 90% | 50,444 psi | 79% | 3051 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 47,195 psi | 74% | 2999 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,528 psi | 73% | 3054 fps | 98.1% |
| Vihtavuori N565 | <<locked>> | 80% | 38,392 psi | 60% | 2848 fps | 96.1% |
| Vihtavuori N568 | <<locked>> | 86% | 42,047 psi | 66% | 2976 fps | 96% |
| Vihtavuori N570 | 106.2 gr | 90% | 46,369 psi | 73% | 3107 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,220 psi | 65% | 2976 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,179 psi | 69% | 2920 fps | 99% |
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 .309 | 170gr | Reichenberg HDB Universal. ADI AR 2218 delivers the highest muzzle velocity at 3,353 fps; across all powders the maximum-charge window runs from 2,060 fps to 3,353 fps. ADI AR 2218 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 170.0 gr projectile in 0.309" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, Alliant Reloder-50, Hodgdon TrailBoss 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. Vihtavuori N570, Alliant Reloder-33, Hodgdon Retumbo rank at the top here: for .30-378 Weath. Mag. with the .309 | 170gr | Reichenberg HDB Universal 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.