Load Specifications
Load data in caliber .30 Super Fl. H&H with .308 | 150gr | Merlin Virtus bullet and 26 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>> | 94% | 39,755 psi | 86% | 2877 fps | 96.5% |
| Accurate 4350 | <<locked>> | 86% | 41,640 psi | 90% | 2946 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 86% | 40,567 psi | 87% | 2956 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 82% | 40,495 psi | 87% | 2976 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 40,538 psi | 87% | 2972 fps | 99.6% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,596 psi | 87% | 2992 fps | 97.5% |
| Alliant Reloder-26 | <<locked>> | 92% | 39,378 psi | 85% | 3012 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 40,364 psi | 87% | 2894 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,955 psi | 77% | 1972 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 39,827 psi | 86% | 2887 fps | 98.2% |
| Lovex S065 | <<locked>> | 82% | 39,653 psi | 85% | 2828 fps | 96.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,495 psi | 87% | 2897 fps | 96.7% |
| Norma URP | <<locked>> | 86% | 41,394 psi | 89% | 2940 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 86% | 40,263 psi | 87% | 2923 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,492 psi | 79% | 2018 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 41,582 psi | 90% | 2966 fps | 98.3% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 40,669 psi | 88% | 2979 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 82% | 39,653 psi | 85% | 2828 fps | 96.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 41,466 psi | 89% | 2822 fps | 95.9% |
| Somchem S365 | <<locked>> | 88% | 39,929 psi | 86% | 2946 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 41,785 psi | 90% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 40,335 psi | 87% | 2881 fps | 98.1% |
| Vihtavuori N550 | <<locked>> | 84% | 39,653 psi | 85% | 2881 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 92% | 39,421 psi | 85% | 2936 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 39,871 psi | 86% | 2851 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,698 psi | 90% | 3133 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 36,956 psi | 80% | 2815 fps | 95.6% |
| Accurate 4350 | <<locked>> | 80% | 33,518 psi | 72% | 2749 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,402 psi | 72% | 2772 fps | 96.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,608 psi | 81% | 2907 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 84% | 27,427 psi | 59% | 2608 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 96% | 35,621 psi | 77% | 2861 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 88% | 34,011 psi | 73% | 2867 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,676 psi | 66% | 2654 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,687 psi | 57% | 1762 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 32,503 psi | 70% | 2707 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 37,072 psi | 80% | 2766 fps | 95.9% |
| Lovex S071 | <<locked>> | 96% | 35,491 psi | 76% | 2779 fps | 95% |
| Norma URP | <<locked>> | 80% | 33,736 psi | 73% | 2756 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 84% | 37,579 psi | 81% | 2858 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,079 psi | 58% | 1804 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,417 psi | 72% | 2769 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 35,317 psi | 76% | 2841 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,072 psi | 80% | 2766 fps | 95.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 38,870 psi | 84% | 2762 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 30,139 psi | 65% | 2697 fps | 98.2% |
| Vihtavuori N150 | <<locked>> | 80% | 39,146 psi | 84% | 2802 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 35,172 psi | 76% | 2759 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 80% | 34,577 psi | 75% | 2753 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 84% | 29,849 psi | 64% | 2687 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,592 psi | 75% | 2726 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 27,615 psi | 60% | 2694 fps | 96% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 26 powders for .30 Super Fl. H&H loaded with the .308 | 150gr | Merlin Virtus. Winchester StaBALL HD delivers the highest muzzle velocity at 3,133 fps; across all powders the maximum-charge window runs from 1,972 fps to 3,133 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 26 of the 26 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (320 MPa), the top charges use 77–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Hodgdon TrailBoss, Lovex S071 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.