Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 160gr | Peregrine VRG-3 Lever bullet and 56 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% | 55,695 psi | 87% | 3186 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 53,896 psi | 84% | 3287 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 86% | 54,940 psi | 86% | 3294 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 86% | 57,319 psi | 90% | 3287 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 88% | 55,796 psi | 87% | 3297 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 96% | 54,462 psi | 85% | 3268 fps | 99.7% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,245 psi | 87% | 3383 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,319 psi | 90% | 3350 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,363 psi | 90% | 3274 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,797 psi | 89% | 3271 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,130 psi | 88% | 3291 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 54,157 psi | 85% | 3192 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 54,520 psi | 85% | 3268 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 54,592 psi | 86% | 3278 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,811 psi | 89% | 3360 fps | 97.8% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 51,982 psi | 81% | 3255 fps | 96.2% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,623 psi | 89% | 3255 fps | 97.9% |
| Bofors RP15 | <<locked>> | 90% | 55,492 psi | 87% | 3278 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 54,172 psi | 85% | 3274 fps | 99.6% |
| Bofors RP5 | <<locked>> | 88% | 56,130 psi | 88% | 3291 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 94% | 56,072 psi | 88% | 3291 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 86% | 54,795 psi | 86% | 3222 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,653 psi | 90% | 3274 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,406 psi | 90% | 3186 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,537 psi | 90% | 3422 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,521 psi | 59% | 2119 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,709 psi | 87% | 3199 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,246 psi | 88% | 3202 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,317 psi | 87% | 3205 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 88% | 54,041 psi | 85% | 3274 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,257 psi | 82% | 3255 fps | 99.4% |
| Lovex S071 | <<locked>> | 94% | 57,435 psi | 90% | 3212 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,145 psi | 90% | 3264 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 53,432 psi | 84% | 3284 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,275 psi | 88% | 3310 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,274 psi | 87% | 3297 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 82% | 57,072 psi | 89% | 3255 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 53,766 psi | 84% | 3219 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,508 psi | 60% | 2169 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 54,520 psi | 85% | 3340 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 53,679 psi | 84% | 3291 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 84% | 54,143 psi | 85% | 3189 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 86% | 56,376 psi | 88% | 3261 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 55,985 psi | 88% | 3258 fps | 99.9% |
| Somchem S361 | <<locked>> | 84% | 55,550 psi | 87% | 3176 fps | 99.1% |
| Somchem S365 | <<locked>> | 82% | 55,622 psi | 87% | 3192 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,826 psi | 89% | 3228 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 56,898 psi | 89% | 3212 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 56,057 psi | 88% | 3225 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 86% | 55,825 psi | 87% | 3225 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,738 psi | 87% | 3310 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 92% | 56,536 psi | 89% | 3294 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 94% | 54,346 psi | 85% | 3297 fps | 98.5% |
| Vihtavuori N570 | <<locked>> | 96% | 55,637 psi | 87% | 3366 fps | 97.2% |
| Winchester StaBALL HD | <<locked>> | 88% | 54,027 psi | 85% | 3281 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,884 psi | 89% | 3225 fps | 99.9% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 42,090 psi | 66% | 2933 fps | 99.6% |
| Accurate High Country | <<locked>> | 80% | 46,615 psi | 73% | 3143 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 80% | 44,077 psi | 69% | 3071 fps | 96.4% |
| ADI AR 2209 | <<locked>> | 80% | 46,514 psi | 73% | 3084 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 80% | 41,756 psi | 65% | 3015 fps | 96.9% |
| ADI AR 2217 | <<locked>> | 86% | 38,130 psi | 60% | 2920 fps | 96.1% |
| ADI AR 2218 | <<locked>> | 96% | 47,355 psi | 74% | 3212 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 82% | 30,211 psi | 47% | 2733 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,679 psi | 84% | 3215 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,412 psi | 73% | 3077 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,409 psi | 66% | 3018 fps | 98.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,191 psi | 65% | 2959 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,447 psi | 56% | 2877 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,789 psi | 73% | 3140 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 48,530 psi | 76% | 3202 fps | 95.8% |
| Alliant Reloder-50 | <<locked>> | 98% | 48,008 psi | 75% | 3173 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 46,325 psi | 73% | 3054 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 39,349 psi | 62% | 2943 fps | 97.2% |
| Bofors RP30 | <<locked>> | 82% | 35,389 psi | 55% | 2861 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 42,409 psi | 66% | 3018 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 82% | 36,129 psi | 57% | 2867 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 80% | 44,367 psi | 70% | 3018 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,569 psi | 68% | 2999 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,270 psi | 79% | 3074 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 34,592 psi | 54% | 2910 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,108 psi | 44% | 1900 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,170 psi | 82% | 3136 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 52,562 psi | 82% | 3140 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,397 psi | 71% | 3012 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 80% | 40,437 psi | 63% | 2989 fps | 96.5% |
| IMR 8133 Enduron | <<locked>> | 90% | 36,608 psi | 57% | 2907 fps | 95.4% |
| Lovex S071 | <<locked>> | 80% | 36,129 psi | 57% | 2795 fps | 98.6% |
| Norma 204 | <<locked>> | 80% | 53,214 psi | 83% | 3192 fps | 99.7% |
| Norma 217 | <<locked>> | 86% | 31,966 psi | 50% | 2795 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 45,150 psi | 71% | 3100 fps | 99.5% |
| Ramshot Grand | <<locked>> | 80% | 40,495 psi | 63% | 3002 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 80% | 53,272 psi | 83% | 3196 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,361 psi | 57% | 2861 fps | 97.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,805 psi | 45% | 1946 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 33,939 psi | 53% | 2877 fps | 97.4% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 42,409 psi | 66% | 3058 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 47,311 psi | 74% | 3058 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 80% | 45,919 psi | 72% | 3064 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,585 psi | 71% | 3058 fps | 98.9% |
| Somchem S361 | <<locked>> | 80% | 48,385 psi | 76% | 3045 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 51,866 psi | 81% | 3133 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,311 psi | 73% | 3038 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 80% | 40,379 psi | 63% | 2897 fps | 98.2% |
| Vihtavuori N170 | <<locked>> | 92% | 52,243 psi | 82% | 3153 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 80% | 45,513 psi | 71% | 3045 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,875 psi | 70% | 3094 fps | 97.2% |
| Vihtavuori N565 | <<locked>> | 82% | 39,740 psi | 62% | 2949 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 88% | 43,497 psi | 68% | 3077 fps | 95.8% |
| Vihtavuori N570 | <<locked>> | 92% | 47,877 psi | 75% | 3209 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,247 psi | 62% | 3009 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,714 psi | 67% | 2959 fps | 98.3% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 62 powders for .30-378 Weath. Mag. loaded with the .308 | 160gr | Peregrine VRG-3 Lever. Hodgdon Retumbo delivers the highest muzzle velocity at 3,422 fps; across all powders the maximum-charge window runs from 2,119 fps to 3,422 fps. Accurate 8700 gives the best case fill at 100 %, and 62 of the 62 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 160.0 gr projectile in 0.308" calls for a 1:13.5 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.