Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 187gr | Peregrine VLR5 (VLR-5) bullet and 54 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ADI AR 2218 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% | 55,506 psi | 87% | 2979 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 46,920 psi | 74% | 2936 fps | 96.4% |
| Accurate High Country | <<locked>> | 84% | 57,740 psi | 90% | 3150 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 54,781 psi | 86% | 3094 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 84% | 56,869 psi | 89% | 3074 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,695 psi | 87% | 3094 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 94% | 54,737 psi | 86% | 3074 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 55,013 psi | 86% | 3199 fps | 98.9% |
| ADI AR 2225 | <<locked>> | 96% | 53,824 psi | 84% | 3091 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 57,029 psi | 89% | 3068 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,449 psi | 88% | 3064 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,101 psi | 88% | 3084 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,273 psi | 85% | 2989 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 54,868 psi | 86% | 3064 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 54,737 psi | 86% | 3074 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 57,029 psi | 89% | 3176 fps | 98.9% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 56,710 psi | 89% | 3159 fps | 98.5% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,188 psi | 88% | 3058 fps | 98.9% |
| Bofors RP15 | <<locked>> | 88% | 55,477 psi | 87% | 3074 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 54,549 psi | 85% | 3084 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 56,101 psi | 88% | 3084 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 56,202 psi | 88% | 3094 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 54,389 psi | 85% | 3018 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,305 psi | 90% | 3068 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,058 psi | 89% | 2969 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 54,085 psi | 85% | 3156 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,724 psi | 59% | 1962 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,723 psi | 86% | 2999 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 86% | 54,041 psi | 85% | 3074 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 92% | 57,043 psi | 89% | 3005 fps | 96.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,652 psi | 89% | 3133 fps | 100% |
| Lovex S071 | <<locked>> | 92% | 57,435 psi | 90% | 3009 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,027 psi | 85% | 3094 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,072 psi | 88% | 3100 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,361 psi | 87% | 3100 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 53,795 psi | 84% | 3022 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,827 psi | 61% | 2008 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 54,897 psi | 86% | 3140 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 53,940 psi | 85% | 3107 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 84% | 57,203 psi | 90% | 3041 fps | 100% |
| Rottweil R 905 | <<locked>> | 84% | 56,188 psi | 88% | 3054 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 48,892 psi | 77% | 2949 fps | 96.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,811 psi | 87% | 3048 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 54,911 psi | 86% | 2972 fps | 99.7% |
| Somchem S385 | <<locked>> | 84% | 56,376 psi | 88% | 3018 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,579 psi | 89% | 3009 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 55,840 psi | 88% | 3038 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 84% | 55,927 psi | 88% | 3015 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,506 psi | 87% | 3104 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 90% | 56,637 psi | 89% | 3100 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 92% | 54,520 psi | 85% | 3110 fps | 99.4% |
| Vihtavuori N570 | <<locked>> | 94% | 56,043 psi | 88% | 3182 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 86% | 54,650 psi | 86% | 3077 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,449 psi | 88% | 3022 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% | 45,252 psi | 71% | 2812 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 43,482 psi | 68% | 2867 fps | 95.2% |
| Accurate High Country | <<locked>> | 80% | 50,198 psi | 79% | 3018 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 80% | 47,500 psi | 74% | 2959 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 80% | 49,734 psi | 78% | 2953 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 44,918 psi | 70% | 2897 fps | 98.9% |
| ADI AR 2217 | <<locked>> | 80% | 33,243 psi | 52% | 2621 fps | 95.8% |
| ADI AR 2218 | 107.2 gr | 92% | 43,990 psi | 69% | 2969 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 30,487 psi | 48% | 2585 fps | 97.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 50,038 psi | 78% | 2953 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,574 psi | 78% | 2946 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,556 psi | 71% | 2900 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,353 psi | 70% | 2825 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,537 psi | 60% | 2772 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,662 psi | 79% | 3009 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 41,959 psi | 66% | 2884 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 94% | 45,034 psi | 71% | 2940 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,004 psi | 67% | 2805 fps | 96% |
| Bofors RP15 | <<locked>> | 80% | 42,366 psi | 66% | 2831 fps | 99.1% |
| Bofors RP30 | <<locked>> | 80% | 35,839 psi | 56% | 2700 fps | 96.9% |
| Bofors RP5 | <<locked>> | 80% | 45,556 psi | 71% | 2900 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 80% | 36,245 psi | 57% | 2707 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 80% | 47,413 psi | 74% | 2897 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,528 psi | 73% | 2877 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,461 psi | 84% | 2917 fps | 100% |
| Hodgdon Retumbo | 87.9 gr | 80% | 37,550 psi | 59% | 2822 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,369 psi | 44% | 1755 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,167 psi | 75% | 2881 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 80% | 43,758 psi | 69% | 2881 fps | 98.7% |
| IMR 7977 Enduron | <<locked>> | 90% | 53,359 psi | 84% | 2943 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 84% | 32,372 psi | 51% | 2628 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 38,827 psi | 61% | 2680 fps | 99.8% |
| Norma 217 | <<locked>> | 80% | 28,123 psi | 44% | 2520 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 48,689 psi | 76% | 2976 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 44,063 psi | 69% | 2894 fps | 99% |
| Ramshot Magnum | <<locked>> | 80% | 39,523 psi | 62% | 2762 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,037 psi | 46% | 1798 fps | 100% |
| ReloadSwiss RS 76 | 94.1 gr | 80% | 36,941 psi | 58% | 2795 fps | 99.6% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 36,637 psi | 57% | 2746 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 50,241 psi | 79% | 2923 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 49,153 psi | 77% | 2936 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 45,600 psi | 71% | 2887 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,805 psi | 76% | 2930 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 51,343 psi | 80% | 2917 fps | 99.4% |
| Somchem S385 | <<locked>> | 80% | 49,385 psi | 77% | 2904 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 43,308 psi | 68% | 2782 fps | 99.6% |
| Vihtavuori N170 | <<locked>> | 88% | 48,617 psi | 76% | 2907 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 48,994 psi | 77% | 2907 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,269 psi | 76% | 2972 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 80% | 40,001 psi | 63% | 2779 fps | 97.5% |
| Vihtavuori N568 | <<locked>> | 82% | 37,724 psi | 59% | 2766 fps | 95.4% |
| Vihtavuori N570 | <<locked>> | 88% | 44,875 psi | 70% | 2963 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,265 psi | 68% | 2890 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,774 psi | 72% | 2838 fps | 99.6% |
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 54 powders for .30-378 Weath. Mag. loaded with the .308 | 187gr | Peregrine VLR5 (VLR-5). ADI AR 2218 delivers the highest muzzle velocity at 3,199 fps; across all powders the maximum-charge window runs from 1,962 fps to 3,199 fps. Accurate 8700 gives the best case fill at 100 %, and 54 of the 54 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 187.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Alliant Reloder-50, Hodgdon TrailBoss 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, ADI AR 2218, ReloadSwiss RS 76 rank at the top here: for .30-378 Weath. Mag. with the .308 | 187gr | Peregrine VLR5 (VLR-5) 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.