Load Specifications
Load data in caliber .30 Super Fl. H&H with .308 | 150gr | Speer Grand Slam 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>> | 92% | 40,538 psi | 87% | 2897 fps | 97% |
| Accurate 4350 | <<locked>> | 82% | 39,204 psi | 84% | 2890 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 84% | 40,727 psi | 88% | 2966 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 41,147 psi | 89% | 2989 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 98% | 41,031 psi | 88% | 3009 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 90% | 40,016 psi | 86% | 3028 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 82% | 41,408 psi | 89% | 2943 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 40,669 psi | 88% | 2900 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,289 psi | 78% | 1991 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 40,277 psi | 87% | 2900 fps | 98.4% |
| Lovex S070 | <<locked>> | 82% | 40,437 psi | 87% | 2867 fps | 96.1% |
| Lovex S071 | <<locked>> | 98% | 41,553 psi | 90% | 2917 fps | 97.3% |
| Norma URP | <<locked>> | 84% | 41,655 psi | 90% | 2946 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 84% | 40,596 psi | 87% | 2933 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,883 psi | 79% | 2037 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 41,887 psi | 90% | 2972 fps | 98.5% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 40,770 psi | 88% | 2986 fps | 98% |
| Shooters World SW4350 | <<locked>> | 82% | 40,437 psi | 87% | 2867 fps | 96.1% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 41,568 psi | 90% | 2828 fps | 96.2% |
| Somchem S365 | <<locked>> | 86% | 40,538 psi | 87% | 2959 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 40,437 psi | 87% | 2884 fps | 98.3% |
| Vihtavuori N550 | <<locked>> | 82% | 40,001 psi | 86% | 2887 fps | 98% |
| Vihtavuori N555 | <<locked>> | 90% | 40,335 psi | 87% | 2956 fps | 98.9% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 39,813 psi | 86% | 2854 fps | 99.7% |
| Winchester 760 | <<locked>> | 82% | 41,408 psi | 89% | 2943 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 96% | 39,479 psi | 85% | 3081 fps | 100% |
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 35,375 psi | 76% | 2772 fps | 95.2% |
| Accurate 4350 | <<locked>> | 80% | 36,593 psi | 79% | 2828 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,723 psi | 77% | 2838 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 82% | 27,949 psi | 60% | 2625 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,779 psi | 73% | 2812 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 84% | 32,242 psi | 69% | 2812 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 38,595 psi | 83% | 2877 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,257 psi | 72% | 2723 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,021 psi | 58% | 1781 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 35,259 psi | 76% | 2779 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 37,942 psi | 82% | 2805 fps | 95.2% |
| Lovex S071 | <<locked>> | 94% | 36,448 psi | 79% | 2799 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 36,463 psi | 79% | 2825 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 80% | 35,346 psi | 76% | 2802 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,630 psi | 60% | 1827 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,347 psi | 78% | 2844 fps | 97% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,404 psi | 76% | 2844 fps | 96.1% |
| Shooters World SW4350 | <<locked>> | 80% | 37,942 psi | 82% | 2805 fps | 95.2% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,972 psi | 84% | 2769 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 32,967 psi | 71% | 2776 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 80% | 37,855 psi | 82% | 2825 fps | 97.6% |
| Vihtavuori N550 | <<locked>> | 80% | 37,362 psi | 81% | 2825 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 82% | 30,705 psi | 66% | 2707 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,086 psi | 80% | 2789 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 38,769 psi | 84% | 2881 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,440 psi | 57% | 2651 fps | 95.4% |
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 | Speer Grand Slam. Winchester StaBALL HD delivers the highest muzzle velocity at 3,081 fps; across all powders the maximum-charge window runs from 1,991 fps to 3,081 fps. Hodgdon TrailBoss 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 78–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:16.0 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.