Load Specifications
Load data in caliber .300 HAM'R with .308 | 150gr | Frontier PH HPFB bullet and 23 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Shooters World Buffalo Rifle, Lovex D060 and Shooters World SOCOM.
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 1680ᴾ | <<locked>> | 100% | 50,357 psi | 88% | 1916 fps | 98.2% |
| Accurate 5744 | <<locked>> | 86% | 51,909 psi | 90% | 1939 fps | 99.2% |
| Accurate No. 11 FS | <<locked>> | 88% | 49,806 psi | 87% | 1900 fps | 100% |
| ADI AR 2205 | <<locked>> | 92% | 51,793 psi | 90% | 1854 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 39,508 psi | 69% | 1864 fps | 99.5% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 42,032 psi | 73% | 1864 fps | 97.6% |
| Hodgdon LilGun | <<locked>> | 84% | 50,140 psi | 87% | 1916 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 25,976 psi | 45% | 1099 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 36,651 psi | 64% | 1781 fps | 96.4% |
| IMR 4227 | <<locked>> | 98% | 50,082 psi | 87% | 1906 fps | 99.8% |
| Lovex D060 | <<locked>> | 92% | 51,909 psi | 90% | 1939 fps | 99.2% |
| Lovex D063 | <<locked>> | 86% | 48,370 psi | 84% | 1893 fps | 98.8% |
| Lovex S040 | <<locked>> | 84% | 50,879 psi | 88% | 1824 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 49,342 psi | 86% | 1900 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 33,997 psi | 59% | 1804 fps | 96% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 24,192 psi | 42% | 1115 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 51,184 psi | 89% | 1959 fps | 99.8% |
| Shooters World Blackout | <<locked>> | 86% | 48,370 psi | 84% | 1893 fps | 98.8% |
| Shooters World Buffalo Rifle | <<locked>> | 92% | 51,909 psi | 90% | 1939 fps | 99.2% |
| Shooters World SOCOM | <<locked>> | 90% | 49,661 psi | 86% | 1896 fps | 99.3% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 45,107 psi | 78% | 1755 fps | 100% |
| Vihtavuori N110 | <<locked>> | 96% | 51,938 psi | 90% | 1870 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 40,074 psi | 70% | 1847 fps | 99.9% |
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>> | 92% | 37,768 psi | 66% | 1765 fps | 95.6% |
| Accurate 5744 | <<locked>> | 80% | 42,496 psi | 74% | 1824 fps | 97.8% |
| Accurate No. 11 FS | <<locked>> | 80% | 37,449 psi | 65% | 1752 fps | 99.3% |
| ADI AR 2205 | <<locked>> | 80% | 34,867 psi | 61% | 1657 fps | 99.8% |
| ADI AR 2207 | <<locked>> | 86% | 24,207 psi | 42% | 1608 fps | 95.3% |
| Alliant Reloder-7 | <<locked>> | 94% | 33,910 psi | 59% | 1749 fps | 95.4% |
| Hodgdon LilGun | <<locked>> | 80% | 42,728 psi | 74% | 1844 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,173 psi | 32% | 978 fps | 100% |
| IMR 4198 | <<locked>> | 98% | 34,650 psi | 60% | 1749 fps | 95.8% |
| IMR 4227 | <<locked>> | 80% | 27,659 psi | 48% | 1594 fps | 95.2% |
| Lovex D060 | 13.8 gr | 80% | 35,911 psi | 62% | 1729 fps | 96.2% |
| Lovex D063 | <<locked>> | 80% | 39,276 psi | 68% | 1781 fps | 97.3% |
| Lovex S040 | <<locked>> | 80% | 44,382 psi | 77% | 1759 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 25,817 psi | 45% | 1572 fps | 98% |
| Norma 200 | <<locked>> | 98% | 31,285 psi | 54% | 1759 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 16,781 psi | 29% | 994 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 27,615 psi | 48% | 1631 fps | 95% |
| Shooters World Blackout | <<locked>> | 80% | 39,276 psi | 68% | 1781 fps | 97.3% |
| Shooters World Buffalo Rifle | 13.8 gr | 80% | 35,911 psi | 62% | 1729 fps | 96.2% |
| Shooters World SOCOM | 15.4 gr | 80% | 34,664 psi | 60% | 1706 fps | 96.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 24,816 psi | 43% | 1493 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 30,893 psi | 54% | 1631 fps | 100% |
| Vihtavuori N120 | <<locked>> | 82% | 21,509 psi | 37% | 1526 fps | 95.1% |
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 23 powders for .300 HAM'R loaded with the .308 | 150gr | Frontier PH HPFB. ReloadSwiss RS 36 delivers the highest muzzle velocity at 1,959 fps; across all powders the maximum-charge window runs from 1,099 fps to 1,959 fps. Accurate 1680 gives the best case fill at 100 %, and 23 of the 23 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (396 MPa), the top charges use 42–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 1680, ADI AR 2207, Alliant Reloder-7 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. Shooters World Buffalo Rifle, Lovex D060, Shooters World SOCOM rank at the top here: for .300 HAM'R with the .308 | 150gr | Frontier PH HPFB they combine a high case fill with complete burn and sit in the upper velocity band. 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.