Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 156gr | Reichenberg HDB Ogival bullet and 60 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% | 54,230 psi | 85% | 3196 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 56,304 psi | 88% | 3363 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 88% | 57,392 psi | 90% | 3369 fps | 99% |
| ADI AR 2209 | <<locked>> | 86% | 55,869 psi | 88% | 3297 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 88% | 54,273 psi | 85% | 3304 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 98% | 56,942 psi | 89% | 3340 fps | 99.8% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 53,359 psi | 84% | 3373 fps | 96.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 55,376 psi | 87% | 3356 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 55,970 psi | 88% | 3291 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,361 psi | 87% | 3281 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 54,607 psi | 86% | 3297 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 56,376 psi | 88% | 3264 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 56,637 psi | 89% | 3337 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 57,232 psi | 90% | 3356 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 54,897 psi | 86% | 3356 fps | 97.2% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 55,230 psi | 87% | 3258 fps | 97.4% |
| Bofors RP15 | <<locked>> | 92% | 57,638 psi | 90% | 3350 fps | 99.9% |
| Bofors RP30 | <<locked>> | 96% | 56,449 psi | 88% | 3346 fps | 99.7% |
| Bofors RP5 | <<locked>> | 88% | 54,607 psi | 86% | 3297 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 94% | 54,476 psi | 85% | 3301 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 88% | 57,261 psi | 90% | 3297 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 56,202 psi | 88% | 3281 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 56,057 psi | 88% | 3202 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 55,709 psi | 87% | 3428 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,507 psi | 59% | 2142 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 54,563 psi | 86% | 3212 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 54,969 psi | 86% | 3212 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,725 psi | 90% | 3278 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 90% | 56,405 psi | 88% | 3350 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,633 psi | 79% | 3258 fps | 99.1% |
| Lovex S070 | <<locked>> | 82% | 56,579 psi | 89% | 3245 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 55,898 psi | 88% | 3219 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,695 psi | 87% | 3271 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 51,488 psi | 81% | 3281 fps | 100% |
| Norma MRP | <<locked>> | 86% | 54,665 psi | 86% | 3317 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,608 psi | 89% | 3264 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,740 psi | 90% | 3373 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 55,622 psi | 87% | 3268 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 56,217 psi | 88% | 3291 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,363 psi | 60% | 2188 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,740 psi | 90% | 3337 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 56,826 psi | 89% | 3412 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 56,130 psi | 88% | 3366 fps | 99% |
| Rottweil R 904 | <<locked>> | 86% | 56,536 psi | 89% | 3264 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 86% | 55,071 psi | 86% | 3271 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 82% | 56,579 psi | 89% | 3245 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,130 psi | 90% | 3196 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 54,679 psi | 86% | 3264 fps | 99.8% |
| Somchem S361 | <<locked>> | 84% | 54,317 psi | 85% | 3186 fps | 98.8% |
| Somchem S365 | <<locked>> | 82% | 54,215 psi | 85% | 3205 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,390 psi | 87% | 3238 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 55,492 psi | 87% | 3222 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 57,392 psi | 90% | 3255 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 54,288 psi | 85% | 3235 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 54,201 psi | 85% | 3314 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 92% | 54,940 psi | 86% | 3297 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 96% | 56,594 psi | 89% | 3373 fps | 98.7% |
| Vihtavuori N570 | <<locked>> | 96% | 53,737 psi | 84% | 3360 fps | 96.5% |
| Winchester StaBALL HD | <<locked>> | 90% | 56,246 psi | 88% | 3353 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,448 psi | 87% | 3235 fps | 99.8% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 40,959 psi | 64% | 2940 fps | 99.4% |
| Accurate High Country | <<locked>> | 80% | 45,310 psi | 71% | 3146 fps | 97.6% |
| Accurate MAGPRO | <<locked>> | 80% | 42,859 psi | 67% | 3074 fps | 95.6% |
| ADI AR 2209 | <<locked>> | 80% | 45,368 psi | 71% | 3094 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 80% | 40,654 psi | 64% | 3015 fps | 96.2% |
| ADI AR 2217 | <<locked>> | 86% | 37,101 psi | 58% | 2917 fps | 95.3% |
| ADI AR 2218 | <<locked>> | 98% | 49,458 psi | 78% | 3287 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 84% | 31,488 psi | 49% | 2802 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,344 psi | 82% | 3228 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,295 psi | 71% | 3084 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,249 psi | 65% | 3022 fps | 97.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,001 psi | 63% | 2969 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,374 psi | 54% | 2877 fps | 98.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,237 psi | 71% | 3143 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 46,949 psi | 74% | 3196 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 48,356 psi | 76% | 3123 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 38,247 psi | 60% | 2949 fps | 96.6% |
| Bofors RP30 | <<locked>> | 84% | 36,898 psi | 58% | 2930 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 41,249 psi | 65% | 3022 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 82% | 35,128 psi | 55% | 2867 fps | 95.1% |
| Hodgdon H4831 | <<locked>> | 80% | 43,265 psi | 68% | 3022 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,482 psi | 67% | 3005 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,052 psi | 77% | 3087 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 33,547 psi | 53% | 2904 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,036 psi | 44% | 1919 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,068 psi | 80% | 3150 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 51,329 psi | 80% | 3153 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,382 psi | 70% | 3018 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 80% | 39,305 psi | 62% | 2992 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 92% | 38,043 psi | 60% | 2976 fps | 95.7% |
| Lovex S070 | <<locked>> | 80% | 52,968 psi | 83% | 3182 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,085 psi | 55% | 2799 fps | 98% |
| Norma 204 | <<locked>> | 80% | 51,996 psi | 81% | 3205 fps | 99.4% |
| Norma 217 | <<locked>> | 88% | 33,156 psi | 52% | 2861 fps | 96% |
| Norma MRP | <<locked>> | 80% | 43,859 psi | 69% | 3104 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 52,866 psi | 83% | 3199 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,262 psi | 62% | 3002 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 80% | 52,025 psi | 82% | 3205 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,230 psi | 55% | 2861 fps | 96.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,732 psi | 45% | 1965 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,490 psi | 84% | 3271 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 32,793 psi | 51% | 2871 fps | 96.5% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 40,959 psi | 64% | 3051 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 46,224 psi | 72% | 3068 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 80% | 44,730 psi | 70% | 3071 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 80% | 52,968 psi | 83% | 3182 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,403 psi | 84% | 3133 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,411 psi | 70% | 3068 fps | 98.4% |
| Somchem S361 | <<locked>> | 80% | 47,224 psi | 74% | 3051 fps | 97.5% |
| Somchem S365 | <<locked>> | 80% | 50,517 psi | 79% | 3146 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,194 psi | 71% | 3045 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 80% | 39,349 psi | 62% | 2904 fps | 97.7% |
| Vihtavuori N550 | <<locked>> | 80% | 53,708 psi | 84% | 3196 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,266 psi | 69% | 3051 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,656 psi | 68% | 3094 fps | 96.6% |
| Vihtavuori N565 | <<locked>> | 82% | 38,508 psi | 60% | 2946 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 88% | 42,076 psi | 66% | 3074 fps | 95% |
| Vihtavuori N570 | <<locked>> | 94% | 49,966 psi | 78% | 3284 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 37,782 psi | 59% | 3012 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,640 psi | 65% | 2963 fps | 97.8% |
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 | 156gr | Reichenberg HDB Ogival. Hodgdon Retumbo delivers the highest muzzle velocity at 3,428 fps; across all powders the maximum-charge window runs from 2,142 fps to 3,428 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 156.0 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, 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.