Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 168gr | Speer Target Match bullet and 67 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>> | 90% | 56,405 psi | 88% | 3123 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,985 psi | 89% | 3150 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 54,404 psi | 85% | 3232 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 88% | 55,317 psi | 87% | 3232 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 86% | 54,070 psi | 85% | 3159 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 90% | 56,028 psi | 88% | 3232 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 98% | 54,491 psi | 85% | 3199 fps | 99.6% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 51,053 psi | 80% | 3228 fps | 96.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,837 psi | 83% | 3219 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 54,317 psi | 85% | 3153 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 57,464 psi | 90% | 3212 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,420 psi | 88% | 3225 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 90% | 54,404 psi | 85% | 3133 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 54,288 psi | 85% | 3202 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 54,926 psi | 86% | 3225 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,188 psi | 88% | 3291 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 56,869 psi | 89% | 3182 fps | 97.8% |
| Bofors RP15 | <<locked>> | 92% | 55,782 psi | 87% | 3215 fps | 99.9% |
| Bofors RP30 | <<locked>> | 96% | 54,099 psi | 85% | 3212 fps | 99.6% |
| Bofors RP5 | <<locked>> | 90% | 56,420 psi | 88% | 3225 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 96% | 56,057 psi | 88% | 3225 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 88% | 55,405 psi | 87% | 3159 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 88% | 54,476 psi | 85% | 3143 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 54,476 psi | 85% | 3071 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 57,188 psi | 90% | 3353 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,449 psi | 59% | 2031 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 56,724 psi | 89% | 3136 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,217 psi | 90% | 3140 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,130 psi | 88% | 3140 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 90% | 54,259 psi | 85% | 3209 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,341 psi | 76% | 3123 fps | 98.9% |
| Lovex S065 | <<locked>> | 82% | 57,000 psi | 89% | 3114 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,405 psi | 87% | 3114 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 54,404 psi | 85% | 3094 fps | 100% |
| Norma 204 | <<locked>> | 82% | 54,099 psi | 85% | 3136 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 49,095 psi | 77% | 3153 fps | 99.9% |
| Norma MRP | <<locked>> | 88% | 56,507 psi | 89% | 3248 fps | 100% |
| Norma URP | <<locked>> | 82% | 55,187 psi | 86% | 3130 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 55,390 psi | 87% | 3232 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 82% | 54,027 psi | 85% | 3136 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 53,737 psi | 84% | 3156 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,421 psi | 60% | 2080 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,130 psi | 90% | 3173 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 55,651 psi | 87% | 3202 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 53,867 psi | 84% | 3274 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 57,566 psi | 90% | 3301 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 86% | 54,984 psi | 86% | 3127 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 88% | 57,130 psi | 90% | 3199 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,000 psi | 89% | 3114 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,405 psi | 87% | 3114 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,927 psi | 88% | 3064 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 56,724 psi | 89% | 3192 fps | 99.9% |
| Somchem S361 | <<locked>> | 86% | 56,434 psi | 88% | 3117 fps | 99.2% |
| Somchem S365 | <<locked>> | 84% | 56,376 psi | 88% | 3133 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 57,595 psi | 90% | 3166 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 56,710 psi | 89% | 3120 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 57,377 psi | 90% | 3146 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 56,405 psi | 88% | 3159 fps | 96% |
| Vihtavuori N550 | <<locked>> | 82% | 55,912 psi | 88% | 3123 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,391 psi | 88% | 3163 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,043 psi | 88% | 3245 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 94% | 56,739 psi | 89% | 3232 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 96% | 54,157 psi | 85% | 3235 fps | 98.5% |
| Vihtavuori N570 | <<locked>> | 98% | 55,158 psi | 86% | 3297 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,202 psi | 88% | 3064 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 53,664 psi | 84% | 3222 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 57,406 psi | 90% | 3163 fps | 99.9% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 40,190 psi | 63% | 2831 fps | 99.4% |
| Accurate 4350 | <<locked>> | 80% | 53,171 psi | 83% | 3091 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 43,947 psi | 69% | 3022 fps | 97.6% |
| Accurate MAGPRO | <<locked>> | 80% | 41,495 psi | 65% | 2953 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 44,251 psi | 69% | 2972 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 80% | 39,537 psi | 62% | 2897 fps | 96.2% |
| ADI AR 2217 | <<locked>> | 86% | 36,042 psi | 56% | 2802 fps | 95.2% |
| ADI AR 2218 | <<locked>> | 98% | 47,413 psi | 74% | 3146 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 84% | 30,763 psi | 48% | 2700 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 50,850 psi | 80% | 3097 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,164 psi | 69% | 2963 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,161 psi | 63% | 2907 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,856 psi | 61% | 2854 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,634 psi | 53% | 2776 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,700 psi | 68% | 3025 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 48,182 psi | 76% | 3140 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 47,079 psi | 74% | 2995 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 37,333 psi | 59% | 2835 fps | 96.6% |
| Bofors RP30 | <<locked>> | 84% | 35,853 psi | 56% | 2825 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 40,161 psi | 63% | 2907 fps | 97.7% |
| Hodgdon H1000 | <<locked>> | 82% | 34,301 psi | 54% | 2759 fps | 95.1% |
| Hodgdon H4831 | <<locked>> | 80% | 42,221 psi | 66% | 2904 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,408 psi | 65% | 2884 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,761 psi | 75% | 2959 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 32,837 psi | 51% | 2802 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,137 psi | 44% | 1821 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,951 psi | 78% | 3022 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 50,241 psi | 79% | 3028 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,482 psi | 68% | 2900 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 80% | 38,276 psi | 60% | 2874 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 92% | 36,622 psi | 57% | 2864 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 53,403 psi | 84% | 3058 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,880 psi | 81% | 3054 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,592 psi | 54% | 2697 fps | 98.2% |
| Norma 204 | <<locked>> | 80% | 50,560 psi | 79% | 3074 fps | 99.4% |
| Norma 217 | <<locked>> | 86% | 30,066 psi | 47% | 2697 fps | 95% |
| Norma MRP | <<locked>> | 80% | 42,482 psi | 67% | 2982 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 51,605 psi | 81% | 3071 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,072 psi | 60% | 2884 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 80% | 50,589 psi | 79% | 3077 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,171 psi | 54% | 2753 fps | 96.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,790 psi | 45% | 1864 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,403 psi | 84% | 3114 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 51,764 psi | 81% | 3140 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 31,966 psi | 50% | 2769 fps | 96.6% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 39,247 psi | 62% | 2936 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 45,266 psi | 71% | 2946 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 80% | 43,685 psi | 68% | 2949 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,403 psi | 84% | 3058 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,880 psi | 81% | 3054 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,359 psi | 82% | 3005 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,352 psi | 68% | 2943 fps | 98.4% |
| Somchem S361 | <<locked>> | 80% | 46,137 psi | 72% | 2930 fps | 97.4% |
| Somchem S365 | <<locked>> | 80% | 49,255 psi | 77% | 3025 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,193 psi | 69% | 2927 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 80% | 53,055 psi | 83% | 3061 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,450 psi | 60% | 2792 fps | 97.7% |
| Vihtavuori N170 | <<locked>> | 94% | 52,794 psi | 83% | 3094 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 52,402 psi | 82% | 3068 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,323 psi | 68% | 2936 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,322 psi | 66% | 2972 fps | 96.6% |
| Vihtavuori N565 | <<locked>> | 82% | 37,579 psi | 59% | 2841 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 90% | 43,569 psi | 68% | 3025 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 94% | 47,645 psi | 75% | 3150 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,460 psi | 82% | 3009 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,216 psi | 57% | 2900 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,596 psi | 64% | 2848 fps | 97.8% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 73 powders for .30-378 Weath. Mag. loaded with the .308 | 168gr | Speer Target Match. Hodgdon Retumbo delivers the highest muzzle velocity at 3,353 fps; across all powders the maximum-charge window runs from 2,031 fps to 3,353 fps. Accurate 8700 gives the best case fill at 100 %, and 73 of the 73 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 1:7.5 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, Alliant Reloder-50, IMR 7977 Enduron 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.