Load Specifications
Load data in caliber .510 Whisper with .509 | 500gr | Frontier PH HPFB bullet and 21 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are SNPE Vectan SP 3, Alliant Reloder-10x and Norma 200.
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: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 86% | 44,237 psi | 88% | 1880 fps | 98.5% |
| Accurate 2015ᴾ | <<locked>> | 100% | 42,105 psi | 84% | 1919 fps | 97.2% |
| Accurate LT-30 | <<locked>> | 92% | 44,947 psi | 90% | 1880 fps | 96.3% |
| ADI AR 2207 | <<locked>> | 90% | 43,439 psi | 87% | 1923 fps | 100% |
| ADI AR 2219 | <<locked>> | 94% | 44,425 psi | 89% | 1969 fps | 95.8% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 39,073 psi | 78% | 1932 fps | 98.8% |
| Alliant Reloder-10x | <<locked>> | 96% | 43,250 psi | 86% | 1946 fps | 98.6% |
| Alliant Reloder-7 | <<locked>> | 88% | 42,960 psi | 86% | 1890 fps | 98.8% |
| Baschieri & Pellagri 106 | <<locked>> | 92% | 42,627 psi | 85% | 1873 fps | 96% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,096 psi | 62% | 1178 fps | 100% |
| IMR 4198 | <<locked>> | 94% | 43,526 psi | 87% | 1909 fps | 99.2% |
| IMR 4227 | <<locked>> | 84% | 44,686 psi | 89% | 1873 fps | 99.9% |
| Lovex S053 | <<locked>> | 84% | 43,381 psi | 87% | 1844 fps | 100% |
| Norma 200 | <<locked>> | 92% | 43,482 psi | 87% | 1939 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 30,835 psi | 62% | 1207 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 84% | 43,903 psi | 88% | 1896 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 88% | 44,860 psi | 90% | 1759 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 96% | 44,599 psi | 89% | 1952 fps | 97% |
| Vihtavuori N120 | <<locked>> | 90% | 43,685 psi | 87% | 1896 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 44,541 psi | 89% | 1916 fps | 98.5% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 40,741 psi | 81% | 1870 fps | 96.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 36,463 psi | 73% | 1765 fps | 96.9% |
| Accurate 2015 | <<locked>> | 94% | 34,969 psi | 70% | 1811 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 88% | 40,030 psi | 80% | 1808 fps | 95% |
| ADI AR 2207 | <<locked>> | 80% | 32,024 psi | 64% | 1749 fps | 99% |
| ADI AR 2219 | <<locked>> | 92% | 41,669 psi | 83% | 1929 fps | 95% |
| Alliant AR-Comp | <<locked>> | 90% | 28,848 psi | 58% | 1739 fps | 95.1% |
| Alliant Reloder-10x | 59.9 gr | 86% | 31,894 psi | 64% | 1762 fps | 95.5% |
| Alliant Reloder-7 | <<locked>> | 80% | 33,736 psi | 67% | 1745 fps | 96.8% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 40,001 psi | 80% | 1834 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,814 psi | 46% | 1050 fps | 100% |
| IMR 4198 | <<locked>> | 80% | 29,298 psi | 59% | 1667 fps | 95.4% |
| IMR 4227 | <<locked>> | 80% | 39,624 psi | 79% | 1801 fps | 99.5% |
| Lovex S053 | <<locked>> | 80% | 38,769 psi | 77% | 1781 fps | 100% |
| Norma 200 | 57.8 gr | 80% | 30,008 psi | 60% | 1716 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,611 psi | 45% | 1073 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 38,754 psi | 77% | 1821 fps | 99.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 36,434 psi | 73% | 1657 fps | 100% |
| SNPE Vectan SP 3 | 62.9 gr | 90% | 37,289 psi | 75% | 1841 fps | 95% |
| Vihtavuori N120 | <<locked>> | 80% | 32,271 psi | 64% | 1729 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 88% | 33,054 psi | 66% | 1742 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 96% | 36,405 psi | 73% | 1804 fps | 95.3% |
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 43 powders for .510 Whisper loaded with the .509 | 500gr | Frontier PH HPFB. Somchem S321 delivers the highest muzzle velocity at 1,978 fps; across all powders the maximum-charge window runs from 1,178 fps to 1,978 fps. Accurate 2015 gives the best case fill at 100 %, and 43 of the 43 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (345 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. Accurate 2015, Accurate 2495, Accurate 2520 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. SNPE Vectan SP 3, Alliant Reloder-10x, Norma 200 rank at the top here: for .510 Whisper with the .509 | 500gr | Frontier PH HPFB they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2460, Accurate 2495, Accurate 2520 burn incompletely and react more sensitively to barrel length and temperature. Hodgdon TrailBoss, ReloadSwiss RS 14 stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.