Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 170gr | Norma Tipstrike bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Hodgdon Retumbo and ReloadSwiss RS 76.
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% | 54,665 psi | 86% | 3084 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 57,580 psi | 90% | 3258 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 84% | 55,796 psi | 87% | 3179 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 54,346 psi | 85% | 3192 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 96% | 57,203 psi | 90% | 3232 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 53,751 psi | 84% | 3281 fps | 97.9% |
| ADI AR 2225 | <<locked>> | 98% | 56,260 psi | 88% | 3251 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 55,390 psi | 87% | 3166 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 54,882 psi | 86% | 3189 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 56,666 psi | 89% | 3146 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 57,217 psi | 90% | 3225 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 57,682 psi | 90% | 3241 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 55,593 psi | 87% | 3261 fps | 98% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 55,405 psi | 87% | 3248 fps | 97.5% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 54,853 psi | 86% | 3146 fps | 98% |
| Bofors RP15 | <<locked>> | 88% | 54,317 psi | 85% | 3176 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 57,058 psi | 89% | 3241 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 54,882 psi | 86% | 3189 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 54,723 psi | 86% | 3189 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 57,072 psi | 89% | 3182 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 56,086 psi | 88% | 3166 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 56,115 psi | 88% | 3081 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 56,434 psi | 88% | 3320 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,782 psi | 59% | 2057 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 57,290 psi | 90% | 3159 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 88% | 56,623 psi | 89% | 3235 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 55,230 psi | 87% | 3228 fps | 99.9% |
| Lovex S071 | <<locked>> | 92% | 56,652 psi | 89% | 3117 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 56,478 psi | 89% | 3251 fps | 100% |
| Norma MRP | <<locked>> | 84% | 54,969 psi | 86% | 3202 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 53,940 psi | 85% | 3196 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 90% | 56,507 psi | 89% | 3182 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,711 psi | 61% | 2103 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 57,522 psi | 90% | 3307 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 56,971 psi | 89% | 3271 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 84% | 56,289 psi | 88% | 3146 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 84% | 55,201 psi | 87% | 3156 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 54,824 psi | 86% | 3153 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 57,653 psi | 90% | 3130 fps | 99.6% |
| Somchem S385 | <<locked>> | 84% | 55,492 psi | 87% | 3123 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 55,564 psi | 87% | 3110 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 54,897 psi | 86% | 3130 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 84% | 54,969 psi | 86% | 3123 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 54,375 psi | 85% | 3205 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 90% | 55,593 psi | 87% | 3199 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 94% | 57,276 psi | 90% | 3271 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 94% | 54,549 psi | 85% | 3268 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 57,246 psi | 90% | 3241 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 55,259 psi | 87% | 3117 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% | 44,686 psi | 70% | 2910 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 46,586 psi | 73% | 3051 fps | 97.6% |
| ADI AR 2209 | <<locked>> | 80% | 48,675 psi | 76% | 3051 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 44,005 psi | 69% | 2989 fps | 98% |
| ADI AR 2217 | <<locked>> | 82% | 35,172 psi | 55% | 2769 fps | 95.5% |
| ADI AR 2218 | <<locked>> | 94% | 46,296 psi | 73% | 3120 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 80% | 30,139 psi | 47% | 2667 fps | 96.4% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,602 psi | 76% | 3041 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,788 psi | 70% | 2995 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,526 psi | 68% | 2930 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,710 psi | 59% | 2861 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 49,545 psi | 78% | 3110 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 44,266 psi | 69% | 3035 fps | 95% |
| Alliant Reloder-50 | <<locked>> | 96% | 47,558 psi | 75% | 3097 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 45,208 psi | 71% | 2956 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 41,597 psi | 65% | 2923 fps | 98.3% |
| Bofors RP30 | <<locked>> | 80% | 35,230 psi | 55% | 2785 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 44,788 psi | 70% | 2995 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 80% | 35,665 psi | 56% | 2789 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 80% | 46,557 psi | 73% | 2989 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,701 psi | 72% | 2969 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,518 psi | 82% | 3025 fps | 100% |
| Hodgdon Retumbo | 90.2 gr | 80% | 36,840 psi | 58% | 2907 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,311 psi | 44% | 1841 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,326 psi | 74% | 2976 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 80% | 42,743 psi | 67% | 2969 fps | 97.7% |
| IMR 8133 Enduron | <<locked>> | 88% | 36,506 psi | 57% | 2838 fps | 96% |
| Lovex S071 | <<locked>> | 80% | 38,450 psi | 60% | 2779 fps | 99.4% |
| Norma 217 | <<locked>> | 82% | 29,921 psi | 47% | 2667 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 47,630 psi | 75% | 3071 fps | 99.9% |
| Ramshot Grand | <<locked>> | 80% | 42,946 psi | 67% | 2982 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 80% | 38,812 psi | 61% | 2848 fps | 98.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,095 psi | 46% | 1886 fps | 100% |
| ReloadSwiss RS 76 | 96.5 gr | 80% | 36,201 psi | 57% | 2874 fps | 98.8% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 38,827 psi | 61% | 2904 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 49,313 psi | 77% | 3022 fps | 99% |
| Rottweil R 905 | <<locked>> | 80% | 48,240 psi | 76% | 3031 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,892 psi | 75% | 3025 fps | 99.5% |
| Somchem S361 | <<locked>> | 80% | 50,546 psi | 79% | 3012 fps | 98.8% |
| Somchem S385 | <<locked>> | 80% | 48,689 psi | 76% | 3005 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 42,569 psi | 67% | 2871 fps | 99% |
| Vihtavuori N170 | <<locked>> | 90% | 51,184 psi | 80% | 3061 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 80% | 48,240 psi | 76% | 3012 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 47,224 psi | 74% | 3068 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 80% | 39,421 psi | 62% | 2871 fps | 96.4% |
| Vihtavuori N568 | <<locked>> | 84% | 39,900 psi | 63% | 2920 fps | 95.2% |
| Vihtavuori N570 | 105.3 gr | 90% | 47,152 psi | 74% | 3120 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 42,090 psi | 66% | 2989 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,976 psi | 70% | 2930 fps | 99.1% |
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 49 powders for .30-378 Weath. Mag. loaded with the .308 | 170gr | Norma Tipstrike. Hodgdon Retumbo delivers the highest muzzle velocity at 3,320 fps; across all powders the maximum-charge window runs from 2,057 fps to 3,320 fps. Alliant Reloder-50 gives the best case fill at 100 %, and 49 of the 49 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 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-50, 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .30-378 Weath. Mag. with the .308 | 170gr | Norma Tipstrike 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.