Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 152gr | Lehigh Defense Controlled Chaos bullet and 60 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and ReloadSwiss RS 80.
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% | 54,331 psi | 85% | 3225 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 57,029 psi | 89% | 3392 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 86% | 55,521 psi | 87% | 3320 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 90% | 57,725 psi | 90% | 3396 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 98% | 56,434 psi | 88% | 3360 fps | 99.6% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 53,084 psi | 83% | 3389 fps | 96.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,940 psi | 86% | 3379 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,535 psi | 87% | 3317 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,129 psi | 86% | 3307 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 54,404 psi | 85% | 3323 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 90% | 55,970 psi | 88% | 3291 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 56,275 psi | 88% | 3366 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,826 psi | 89% | 3383 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 54,375 psi | 85% | 3376 fps | 96.8% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,897 psi | 86% | 3278 fps | 97% |
| Bofors RP15 | <<locked>> | 92% | 57,421 psi | 90% | 3373 fps | 99.8% |
| Bofors RP30 | <<locked>> | 96% | 56,086 psi | 88% | 3369 fps | 99.6% |
| Bofors RP5 | <<locked>> | 88% | 54,404 psi | 85% | 3323 fps | 99.7% |
| Hodgdon H1000 | <<locked>> | 94% | 53,969 psi | 85% | 3317 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 88% | 56,927 psi | 89% | 3320 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,912 psi | 88% | 3301 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 55,811 psi | 87% | 3228 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 55,114 psi | 86% | 3451 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,536 psi | 59% | 2162 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 54,302 psi | 85% | 3235 fps | 99.9% |
| IMR 4831 | <<locked>> | 82% | 54,853 psi | 86% | 3241 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,290 psi | 90% | 3297 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 90% | 56,028 psi | 88% | 3373 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,343 psi | 79% | 3281 fps | 98.8% |
| Lovex S070 | <<locked>> | 82% | 56,463 psi | 88% | 3271 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 55,970 psi | 88% | 3248 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,434 psi | 87% | 3294 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 51,169 psi | 80% | 3307 fps | 99.9% |
| Norma MRP | <<locked>> | 86% | 54,273 psi | 85% | 3340 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,376 psi | 88% | 3291 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,348 psi | 90% | 3396 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 82% | 55,390 psi | 87% | 3294 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,782 psi | 87% | 3317 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,406 psi | 60% | 2211 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,348 psi | 90% | 3366 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 56,260 psi | 88% | 3438 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,811 psi | 87% | 3389 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 86% | 56,275 psi | 88% | 3287 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 86% | 54,839 psi | 86% | 3297 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 82% | 56,463 psi | 88% | 3271 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,985 psi | 89% | 3219 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 54,447 psi | 85% | 3291 fps | 99.7% |
| Somchem S361 | <<locked>> | 84% | 54,143 psi | 85% | 3209 fps | 98.6% |
| Somchem S365 | <<locked>> | 82% | 53,998 psi | 85% | 3235 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,303 psi | 87% | 3264 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 90% | 55,143 psi | 86% | 3245 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 57,188 psi | 90% | 3284 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 54,215 psi | 85% | 3264 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 53,795 psi | 84% | 3337 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 92% | 54,737 psi | 86% | 3323 fps | 99% |
| Vihtavuori N568 | <<locked>> | 96% | 56,231 psi | 88% | 3392 fps | 98.4% |
| Vihtavuori N570 | <<locked>> | 98% | 57,508 psi | 90% | 3461 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 57,740 psi | 90% | 3222 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,709 psi | 87% | 3379 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,216 psi | 87% | 3258 fps | 99.7% |
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% | 41,321 psi | 65% | 2976 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 80% | 42,844 psi | 67% | 3100 fps | 95.3% |
| ADI AR 2209 | <<locked>> | 80% | 45,310 psi | 71% | 3120 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 80% | 40,669 psi | 64% | 3041 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 88% | 39,740 psi | 62% | 3012 fps | 96% |
| ADI AR 2218 | <<locked>> | 98% | 49,255 psi | 77% | 3307 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 84% | 31,691 psi | 50% | 2831 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,967 psi | 81% | 3255 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,281 psi | 71% | 3110 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,336 psi | 65% | 3051 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,943 psi | 63% | 2999 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,563 psi | 54% | 2910 fps | 98.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,165 psi | 71% | 3173 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 50,430 psi | 79% | 3297 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 48,196 psi | 76% | 3143 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 38,377 psi | 60% | 2979 fps | 96.3% |
| Bofors RP30 | <<locked>> | 84% | 36,985 psi | 58% | 2959 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 41,336 psi | 65% | 3051 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 84% | 37,782 psi | 59% | 2966 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 80% | 43,163 psi | 68% | 3048 fps | 96% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,511 psi | 67% | 3028 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,863 psi | 77% | 3114 fps | 100% |
| Hodgdon Retumbo | 90.7 gr | 80% | 33,721 psi | 53% | 2936 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,137 psi | 44% | 1939 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,981 psi | 80% | 3176 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 51,401 psi | 81% | 3186 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,396 psi | 70% | 3045 fps | 96.6% |
| IMR 7828 SSC | <<locked>> | 80% | 39,334 psi | 62% | 3018 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 92% | 37,985 psi | 60% | 3002 fps | 95.3% |
| Lovex S070 | <<locked>> | 80% | 53,026 psi | 83% | 3209 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,534 psi | 56% | 2831 fps | 98% |
| Norma 204 | <<locked>> | 80% | 51,779 psi | 81% | 3228 fps | 99.2% |
| Norma 217 | <<locked>> | 88% | 33,344 psi | 52% | 2894 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 43,801 psi | 69% | 3133 fps | 99.1% |
| Norma URP | <<locked>> | 80% | 52,837 psi | 83% | 3232 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,204 psi | 61% | 3025 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 51,822 psi | 81% | 3232 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,288 psi | 55% | 2887 fps | 96.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,863 psi | 45% | 1985 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,301 psi | 84% | 3301 fps | 100% |
| ReloadSwiss RS 76 | 97 gr | 80% | 32,967 psi | 52% | 2900 fps | 96.2% |
| ReloadSwiss RS 80 | 110 gr | 90% | 44,121 psi | 69% | 3156 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 46,195 psi | 72% | 3094 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 80% | 44,788 psi | 70% | 3097 fps | 98.3% |
| Shooters World SW4350 | <<locked>> | 80% | 53,026 psi | 83% | 3209 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,476 psi | 84% | 3159 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,454 psi | 70% | 3094 fps | 98.2% |
| Somchem S361 | <<locked>> | 80% | 47,311 psi | 74% | 3077 fps | 97.2% |
| Somchem S365 | <<locked>> | 80% | 50,502 psi | 79% | 3179 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,353 psi | 71% | 3074 fps | 99% |
| Vihtavuori N165 | <<locked>> | 80% | 39,479 psi | 62% | 2933 fps | 97.5% |
| Vihtavuori N550 | <<locked>> | 80% | 53,577 psi | 84% | 3222 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,469 psi | 70% | 3084 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,555 psi | 68% | 3120 fps | 96.2% |
| Vihtavuori N565 | <<locked>> | 84% | 41,582 psi | 65% | 3051 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 90% | 45,165 psi | 71% | 3173 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 94% | 49,617 psi | 78% | 3307 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 53,708 psi | 84% | 3163 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,666 psi | 59% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,626 psi | 65% | 2989 fps | 97.5% |
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 67 powders for .30-378 Weath. Mag. loaded with the .308 | 152gr | Lehigh Defense Controlled Chaos. Vihtavuori N570 delivers the highest muzzle velocity at 3,461 fps; across all powders the maximum-charge window runs from 2,162 fps to 3,461 fps. Accurate 8700 gives the best case fill at 100 %, and 67 of the 67 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 152.0 gr projectile in 0.308" calls for a 1:12.0 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. Hodgdon Retumbo, ReloadSwiss RS 76, ReloadSwiss RS 80 rank at the top here: for .30-378 Weath. Mag. with the .308 | 152gr | Lehigh Defense Controlled Chaos they combine a high case fill with complete burn and sit in the upper velocity band. 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.