Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 168gr | Reichenberg HDB KUHS bullet and 53 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 57,145 psi | 90% | 3143 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 55,405 psi | 87% | 3251 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 86% | 56,521 psi | 89% | 3261 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 84% | 54,766 psi | 86% | 3182 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 88% | 57,319 psi | 90% | 3261 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 96% | 56,188 psi | 88% | 3235 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,898 psi | 89% | 3360 fps | 98.5% |
| ADI AR 2225 | <<locked>> | 98% | 55,071 psi | 86% | 3251 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 54,346 psi | 85% | 3166 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,638 psi | 90% | 3251 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 55,579 psi | 87% | 3153 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 56,043 psi | 88% | 3225 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,318 psi | 88% | 3241 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 54,331 psi | 85% | 3255 fps | 97.7% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 53,809 psi | 84% | 3235 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 54,143 psi | 85% | 3150 fps | 97.8% |
| Bofors RP15 | <<locked>> | 90% | 56,811 psi | 89% | 3238 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 55,854 psi | 88% | 3241 fps | 99.9% |
| Bofors RP5 | <<locked>> | 88% | 57,638 psi | 90% | 3251 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 57,667 psi | 90% | 3255 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 56,130 psi | 88% | 3186 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,129 psi | 86% | 3166 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,056 psi | 86% | 3087 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 55,361 psi | 87% | 3320 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,666 psi | 59% | 2070 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 56,956 psi | 89% | 3156 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,638 psi | 90% | 3156 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,478 psi | 89% | 3166 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 88% | 55,579 psi | 87% | 3241 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,911 psi | 84% | 3222 fps | 99.7% |
| Lovex S071 | <<locked>> | 92% | 55,129 psi | 86% | 3114 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 3248 fps | 100% |
| Norma MRP | <<locked>> | 86% | 57,667 psi | 90% | 3264 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 56,855 psi | 89% | 3261 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 90% | 55,376 psi | 87% | 3182 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,566 psi | 60% | 2119 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 56,260 psi | 88% | 3304 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 55,521 psi | 87% | 3261 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 84% | 55,303 psi | 87% | 3150 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 84% | 54,070 psi | 85% | 3159 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 57,551 psi | 90% | 3219 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 56,826 psi | 89% | 3140 fps | 99.5% |
| Somchem S365 | <<locked>> | 82% | 57,145 psi | 90% | 3146 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 54,404 psi | 85% | 3127 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 54,534 psi | 85% | 3114 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,493 psi | 90% | 3196 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 86% | 57,217 psi | 90% | 3179 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,101 psi | 89% | 3271 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 90% | 54,186 psi | 85% | 3192 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 94% | 56,043 psi | 88% | 3268 fps | 99.1% |
| Vihtavuori N570 | <<locked>> | 96% | 57,435 psi | 90% | 3337 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 88% | 55,811 psi | 87% | 3241 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 54,230 psi | 85% | 3120 fps | 99.9% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 43,294 psi | 68% | 2904 fps | 99.9% |
| Accurate High Country | <<locked>> | 80% | 48,022 psi | 75% | 3110 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 80% | 45,310 psi | 71% | 3041 fps | 97.2% |
| ADI AR 2209 | <<locked>> | 80% | 47,747 psi | 75% | 3051 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 80% | 42,960 psi | 67% | 2982 fps | 97.7% |
| ADI AR 2217 | <<locked>> | 84% | 36,564 psi | 57% | 2825 fps | 96% |
| ADI AR 2218 | <<locked>> | 94% | 45,194 psi | 71% | 3110 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 80% | 29,051 psi | 46% | 2644 fps | 95.6% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,587 psi | 75% | 3045 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,642 psi | 68% | 2989 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,279 psi | 66% | 2923 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,579 psi | 57% | 2851 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,254 psi | 76% | 3107 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 46,398 psi | 73% | 3100 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 98% | 49,835 psi | 78% | 3156 fps | 96.1% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 44,338 psi | 69% | 2956 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 40,495 psi | 63% | 2917 fps | 98% |
| Bofors RP30 | <<locked>> | 80% | 33,982 psi | 53% | 2769 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 43,642 psi | 68% | 2989 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 80% | 34,621 psi | 54% | 2776 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 80% | 45,556 psi | 71% | 2986 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,730 psi | 70% | 2969 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,503 psi | 81% | 3031 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 35,723 psi | 56% | 2890 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,166 psi | 44% | 1854 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,359 psi | 84% | 3094 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,867 psi | 84% | 3097 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,441 psi | 73% | 2979 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 80% | 41,684 psi | 65% | 2966 fps | 97.4% |
| IMR 8133 Enduron | <<locked>> | 88% | 35,288 psi | 55% | 2822 fps | 95.4% |
| Lovex S071 | <<locked>> | 80% | 37,130 psi | 58% | 2766 fps | 99.1% |
| Norma 217 | <<locked>> | 84% | 30,777 psi | 48% | 2710 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 46,557 psi | 73% | 3068 fps | 99.8% |
| Ramshot Grand | <<locked>> | 80% | 41,901 psi | 66% | 2976 fps | 97.8% |
| Ramshot Magnum | <<locked>> | 80% | 37,507 psi | 59% | 2835 fps | 98.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,892 psi | 45% | 1900 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 35,056 psi | 55% | 2861 fps | 98.3% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 40,596 psi | 64% | 2959 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 48,428 psi | 76% | 3025 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 80% | 47,137 psi | 74% | 3031 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,804 psi | 73% | 3025 fps | 99.3% |
| Somchem S361 | <<locked>> | 80% | 49,487 psi | 78% | 3009 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 53,258 psi | 83% | 3091 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,529 psi | 74% | 3005 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 80% | 41,495 psi | 65% | 2867 fps | 98.8% |
| Vihtavuori N170 | <<locked>> | 90% | 50,082 psi | 78% | 3058 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 80% | 46,760 psi | 73% | 3005 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,209 psi | 72% | 3064 fps | 98% |
| Vihtavuori N565 | <<locked>> | 80% | 38,116 psi | 60% | 2854 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 86% | 41,684 psi | 65% | 2979 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 90% | 45,948 psi | 72% | 3110 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,886 psi | 64% | 2982 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,903 psi | 69% | 2930 fps | 98.8% |
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 | 168gr | Reichenberg HDB KUHS. ADI AR 2218 delivers the highest muzzle velocity at 3,360 fps; across all powders the maximum-charge window runs from 2,070 fps to 3,360 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 168.0 gr projectile in 0.308" calls for a 1:12.5 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, Accurate 8700, IMR 7977 Enduron, 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.