Load Specifications
Load data in caliber .30-378 Weath. Mag. with .308 | 200gr | Peregrine VRG-3 bullet and 49 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>> | 84% | 55,579 psi | 87% | 2894 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 51,445 psi | 81% | 2943 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 82% | 54,911 psi | 86% | 3009 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 82% | 56,811 psi | 89% | 2986 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,651 psi | 87% | 3005 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 55,201 psi | 87% | 2995 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 55,680 psi | 87% | 3130 fps | 99.5% |
| ADI AR 2225 | <<locked>> | 94% | 54,882 psi | 86% | 3015 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 56,202 psi | 88% | 2972 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 56,101 psi | 88% | 2995 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 54,360 psi | 85% | 2897 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 55,303 psi | 87% | 2979 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 57,595 psi | 90% | 3097 fps | 99.4% |
| Alliant Reloder-50 | <<locked>> | 98% | 57,580 psi | 90% | 3094 fps | 99.1% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,840 psi | 88% | 2969 fps | 99.3% |
| Bofors RP15 | <<locked>> | 86% | 55,651 psi | 87% | 2992 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 54,955 psi | 86% | 3002 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 56,101 psi | 88% | 2995 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 56,478 psi | 89% | 3009 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 54,128 psi | 85% | 2933 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,971 psi | 89% | 2979 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 54,955 psi | 86% | 3074 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,043 psi | 60% | 1913 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 54,462 psi | 85% | 2913 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 84% | 54,288 psi | 85% | 2992 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 56,710 psi | 89% | 2927 fps | 96.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 57,508 psi | 90% | 3058 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 57,609 psi | 90% | 2923 fps | 100% |
| Norma 217 | <<locked>> | 96% | 55,114 psi | 86% | 3018 fps | 100% |
| Norma MRP | <<locked>> | 82% | 56,217 psi | 88% | 3009 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 55,608 psi | 87% | 3012 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 53,954 psi | 85% | 2936 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,044 psi | 61% | 1955 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 55,709 psi | 87% | 3058 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 54,534 psi | 85% | 3028 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 82% | 56,985 psi | 89% | 2953 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 56,231 psi | 88% | 2966 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 53,243 psi | 83% | 2949 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,869 psi | 88% | 2963 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,202 psi | 88% | 2930 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,536 psi | 89% | 2923 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,796 psi | 87% | 2959 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 82% | 55,999 psi | 88% | 2927 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 55,550 psi | 87% | 3018 fps | 100% |
| Vihtavuori N565 | <<locked>> | 88% | 56,913 psi | 89% | 3018 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 55,013 psi | 86% | 3035 fps | 99.8% |
| Vihtavuori N570 | <<locked>> | 92% | 56,637 psi | 89% | 3104 fps | 99.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 55,405 psi | 87% | 2989 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 56,144 psi | 88% | 2930 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 48,428 psi | 76% | 2782 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 40,959 psi | 64% | 2736 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 80% | 51,053 psi | 80% | 2943 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 80% | 52,953 psi | 83% | 2923 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 48,312 psi | 76% | 2881 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 80% | 35,969 psi | 56% | 2621 fps | 97.8% |
| ADI AR 2218 | <<locked>> | 88% | 41,118 psi | 64% | 2828 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 33,156 psi | 52% | 2592 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,678 psi | 83% | 2917 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,965 psi | 77% | 2881 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,674 psi | 75% | 2792 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,785 psi | 65% | 2753 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 84% | 39,436 psi | 62% | 2746 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 90% | 42,540 psi | 67% | 2808 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,847 psi | 72% | 2789 fps | 97.6% |
| Bofors RP15 | <<locked>> | 80% | 45,585 psi | 71% | 2815 fps | 99.8% |
| Bofors RP30 | <<locked>> | 80% | 38,870 psi | 61% | 2694 fps | 98.5% |
| Bofors RP5 | <<locked>> | 80% | 48,965 psi | 77% | 2881 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 39,233 psi | 61% | 2700 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 80% | 50,633 psi | 79% | 2874 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,719 psi | 78% | 2858 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 80% | 40,988 psi | 64% | 2818 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,572 psi | 45% | 1709 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,937 psi | 80% | 2851 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 80% | 47,108 psi | 74% | 2864 fps | 99.6% |
| IMR 7977 Enduron | <<locked>> | 86% | 49,806 psi | 78% | 2808 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 80% | 30,676 psi | 48% | 2503 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 41,698 psi | 65% | 2661 fps | 100% |
| Norma 217 | <<locked>> | 80% | 31,111 psi | 49% | 2530 fps | 97.8% |
| Norma MRP | <<locked>> | 80% | 52,388 psi | 82% | 2949 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,848 psi | 75% | 2884 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 80% | 43,047 psi | 67% | 2749 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,269 psi | 46% | 1749 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 40,567 psi | 64% | 2795 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 37,188 psi | 58% | 2680 fps | 96.7% |
| Rottweil R 904 | <<locked>> | 80% | 53,374 psi | 84% | 2897 fps | 100% |
| Rottweil R 905 | <<locked>> | 80% | 52,417 psi | 82% | 2907 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 43,149 psi | 68% | 2759 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 52,069 psi | 82% | 2904 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 52,649 psi | 83% | 2874 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,224 psi | 72% | 2756 fps | 100% |
| Vihtavuori N170 | <<locked>> | 84% | 45,368 psi | 71% | 2772 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 52,417 psi | 82% | 2871 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,822 psi | 81% | 2956 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 80% | 43,105 psi | 68% | 2769 fps | 98.9% |
| Vihtavuori N568 | <<locked>> | 80% | 38,290 psi | 60% | 2700 fps | 96.5% |
| Vihtavuori N570 | <<locked>> | 84% | 42,250 psi | 66% | 2825 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 47,572 psi | 75% | 2871 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,907 psi | 77% | 2815 fps | 100% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 56 powders for .30-378 Weath. Mag. loaded with the .308 | 200gr | Peregrine VRG-3. ADI AR 2218 delivers the highest muzzle velocity at 3,130 fps; across all powders the maximum-charge window runs from 1,913 fps to 3,130 fps. Accurate 8700 gives the best case fill at 100 %, and 56 of the 56 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, Hodgdon US 869 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, Hodgdon 50BMG, Vihtavuori 20N29 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.