Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 168gr | Nosler Expansion Tip bullet and 59 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% | 55,347 psi | 87% | 3117 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 57,638 psi | 90% | 3291 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 86% | 54,592 psi | 86% | 3225 fps | 99% |
| ADI AR 2209 | <<locked>> | 86% | 57,000 psi | 89% | 3215 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 55,492 psi | 87% | 3228 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 96% | 54,143 psi | 85% | 3202 fps | 99.8% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 54,708 psi | 86% | 3317 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 56,927 psi | 89% | 3284 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,188 psi | 90% | 3205 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,478 psi | 89% | 3202 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 55,796 psi | 87% | 3222 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 57,595 psi | 90% | 3182 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 54,143 psi | 85% | 3199 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 54,331 psi | 85% | 3212 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,188 psi | 88% | 3294 fps | 98% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 51,503 psi | 81% | 3196 fps | 96.5% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,217 psi | 88% | 3186 fps | 98.1% |
| Bofors RP15 | <<locked>> | 90% | 55,172 psi | 86% | 3212 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 53,954 psi | 85% | 3209 fps | 99.7% |
| Bofors RP5 | <<locked>> | 88% | 55,796 psi | 87% | 3222 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 55,753 psi | 87% | 3225 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 54,592 psi | 86% | 3156 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,334 psi | 90% | 3205 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,145 psi | 90% | 3117 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,145 psi | 90% | 3353 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,608 psi | 59% | 2060 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,506 psi | 87% | 3130 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,014 psi | 88% | 3130 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,042 psi | 86% | 3136 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 88% | 53,867 psi | 84% | 3209 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 51,909 psi | 81% | 3192 fps | 99.5% |
| Lovex S070 | <<locked>> | 82% | 57,566 psi | 90% | 3159 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 57,087 psi | 89% | 3140 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,913 psi | 89% | 3192 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 52,895 psi | 83% | 3215 fps | 100% |
| Norma MRP | <<locked>> | 86% | 55,985 psi | 88% | 3241 fps | 100% |
| Norma URP | <<locked>> | 82% | 57,667 psi | 90% | 3179 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 54,868 psi | 86% | 3228 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 56,855 psi | 89% | 3189 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 57,667 psi | 90% | 3219 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,493 psi | 60% | 2110 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 53,998 psi | 85% | 3274 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 57,508 psi | 90% | 3301 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 86% | 57,566 psi | 90% | 3186 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 86% | 56,217 psi | 88% | 3196 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 57,566 psi | 90% | 3159 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 55,825 psi | 87% | 3189 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 55,317 psi | 87% | 3110 fps | 99.3% |
| Somchem S365 | <<locked>> | 82% | 55,376 psi | 87% | 3123 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,579 psi | 89% | 3159 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 56,492 psi | 89% | 3143 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 55,782 psi | 87% | 3163 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 86% | 55,579 psi | 87% | 3156 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,448 psi | 87% | 3241 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 92% | 56,188 psi | 88% | 3228 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 94% | 53,853 psi | 84% | 3232 fps | 98.7% |
| Vihtavuori N570 | <<locked>> | 96% | 55,216 psi | 87% | 3301 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 88% | 53,563 psi | 84% | 3212 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,608 psi | 89% | 3159 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 41,959 psi | 66% | 2874 fps | 99.7% |
| Accurate High Country | <<locked>> | 80% | 46,470 psi | 73% | 3081 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 80% | 43,874 psi | 69% | 3009 fps | 96.7% |
| ADI AR 2209 | <<locked>> | 80% | 46,369 psi | 73% | 3022 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 80% | 41,669 psi | 65% | 2956 fps | 97.2% |
| ADI AR 2217 | <<locked>> | 84% | 35,404 psi | 55% | 2792 fps | 95.3% |
| ADI AR 2218 | <<locked>> | 96% | 47,007 psi | 74% | 3153 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 82% | 30,110 psi | 47% | 2684 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,403 psi | 84% | 3143 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,282 psi | 73% | 3015 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,322 psi | 66% | 2963 fps | 98.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,988 psi | 64% | 2897 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,302 psi | 55% | 2822 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,485 psi | 73% | 3074 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 48,080 psi | 75% | 3136 fps | 96% |
| Alliant Reloder-50 | <<locked>> | 98% | 47,601 psi | 75% | 3114 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 46,224 psi | 72% | 2992 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 39,320 psi | 62% | 2887 fps | 97.5% |
| Bofors RP30 | <<locked>> | 82% | 35,230 psi | 55% | 2805 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 42,322 psi | 66% | 2963 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 80% | 33,518 psi | 53% | 2743 fps | 95.1% |
| Hodgdon H4831 | <<locked>> | 80% | 44,295 psi | 69% | 2956 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,497 psi | 68% | 2940 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,995 psi | 78% | 3005 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 34,505 psi | 54% | 2858 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,094 psi | 44% | 1844 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,025 psi | 82% | 3071 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 52,388 psi | 82% | 3074 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,266 psi | 71% | 2949 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 80% | 40,306 psi | 63% | 2933 fps | 96.8% |
| IMR 8133 Enduron | <<locked>> | 90% | 36,434 psi | 57% | 2854 fps | 95.8% |
| Lovex S070 | <<locked>> | 80% | 54,085 psi | 85% | 3104 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,969 psi | 56% | 2736 fps | 98.8% |
| Norma 204 | <<locked>> | 80% | 53,084 psi | 83% | 3130 fps | 99.8% |
| Norma 217 | <<locked>> | 86% | 31,778 psi | 50% | 2746 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 45,020 psi | 71% | 3038 fps | 99.7% |
| Norma URP | <<locked>> | 80% | 54,085 psi | 85% | 3120 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 40,350 psi | 63% | 2943 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 80% | 53,084 psi | 83% | 3127 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,158 psi | 57% | 2802 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,834 psi | 45% | 1890 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 33,707 psi | 53% | 2822 fps | 97.7% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 38,899 psi | 61% | 2923 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 47,253 psi | 74% | 2999 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 80% | 45,905 psi | 72% | 3005 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 80% | 54,085 psi | 85% | 3104 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,556 psi | 71% | 2999 fps | 99.1% |
| Somchem S361 | <<locked>> | 80% | 48,254 psi | 76% | 2982 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 51,692 psi | 81% | 3064 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,209 psi | 72% | 2976 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 80% | 40,277 psi | 63% | 2838 fps | 98.4% |
| Vihtavuori N170 | <<locked>> | 92% | 52,040 psi | 82% | 3094 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 80% | 45,411 psi | 71% | 2982 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,759 psi | 70% | 3031 fps | 97.5% |
| Vihtavuori N565 | <<locked>> | 80% | 36,767 psi | 58% | 2822 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 86% | 40,147 psi | 63% | 2946 fps | 95% |
| Vihtavuori N570 | <<locked>> | 92% | 47,587 psi | 75% | 3150 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,073 psi | 61% | 2949 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,540 psi | 67% | 2900 fps | 98.5% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 66 powders for .30-378 Weath. Mag. loaded with the .308 | 168gr | Nosler Expansion Tip. Hodgdon Retumbo 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. Accurate 8700 gives the best case fill at 100 %, and 66 of the 66 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 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2218, ADI AR 2225 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.