Load Specifications
Load data in caliber .30 Super Fl. H&H with .308 | 150gr | Impala LWH CHP bullet and 21 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>> | 90% | 39,958 psi | 86% | 2854 fps | 96.5% |
| Accurate 4350 | <<locked>> | 82% | 41,307 psi | 89% | 2910 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 84% | 41,974 psi | 90% | 2966 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 40,016 psi | 86% | 2936 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 96% | 39,813 psi | 86% | 2949 fps | 97.2% |
| Alliant Reloder-26 | <<locked>> | 90% | 41,481 psi | 89% | 3038 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 41,974 psi | 90% | 2900 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,680 psi | 79% | 1975 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 41,872 psi | 90% | 2907 fps | 98.6% |
| Lovex S071 | <<locked>> | 96% | 40,944 psi | 88% | 2877 fps | 96.8% |
| Norma URP | <<locked>> | 82% | 40,495 psi | 87% | 2894 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 84% | 41,858 psi | 90% | 2933 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,391 psi | 81% | 2021 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 40,727 psi | 88% | 2923 fps | 98% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 41,989 psi | 90% | 2986 fps | 98.1% |
| Somchem S365 | <<locked>> | 84% | 39,349 psi | 85% | 2910 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 82% | 41,916 psi | 90% | 2890 fps | 98.4% |
| Vihtavuori N550 | <<locked>> | 82% | 41,582 psi | 90% | 2894 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 88% | 39,523 psi | 85% | 2910 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 41,075 psi | 89% | 2854 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 96% | 40,930 psi | 88% | 3091 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 37,565 psi | 81% | 2799 fps | 95.7% |
| Accurate 4350 | <<locked>> | 80% | 38,841 psi | 84% | 2851 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,086 psi | 80% | 2844 fps | 97.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,137 psi | 61% | 2598 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 92% | 35,418 psi | 76% | 2828 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 84% | 34,069 psi | 73% | 2841 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,853 psi | 75% | 2736 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,427 psi | 59% | 1765 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 37,144 psi | 80% | 2795 fps | 97.4% |
| Lovex S071 | <<locked>> | 92% | 36,419 psi | 78% | 2769 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 38,116 psi | 82% | 2838 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 80% | 36,883 psi | 79% | 2815 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,137 psi | 61% | 1811 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,029 psi | 82% | 2858 fps | 97.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,912 psi | 80% | 2858 fps | 96.4% |
| Somchem S365 | <<locked>> | 80% | 34,693 psi | 75% | 2795 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 39,436 psi | 85% | 2835 fps | 97.8% |
| Vihtavuori N550 | <<locked>> | 80% | 39,030 psi | 84% | 2835 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 80% | 30,821 psi | 66% | 2684 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,493 psi | 83% | 2799 fps | 99.3% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,803 psi | 58% | 2631 fps | 95.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 21 powders for .30 Super Fl. H&H loaded with the .308 | 150gr | Impala LWH CHP. Winchester StaBALL HD delivers the highest muzzle velocity at 3,091 fps; across all powders the maximum-charge window runs from 1,975 fps to 3,091 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 21 of the 21 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (320 MPa), the top charges use 79–90 %, 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. Hodgdon TrailBoss, ReloadSwiss RS 14 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.