Load Specifications
Load data in caliber .300 HAM'R with .308 | 154gr | MEN SF bullet and 23 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 36, IMR 4227 and Shooters World Buffalo Rifle.
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>> | 98% | 49,269 psi | 86% | 1893 fps | 98.5% |
| Accurate 5744 | <<locked>> | 84% | 51,227 psi | 89% | 1919 fps | 99.4% |
| Accurate No. 11 FS | <<locked>> | 86% | 49,226 psi | 86% | 1877 fps | 100% |
| ADI AR 2205 | <<locked>> | 90% | 51,010 psi | 89% | 1831 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 41,626 psi | 72% | 1877 fps | 99.9% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 44,831 psi | 78% | 1883 fps | 98.5% |
| Hodgdon LilGun | <<locked>> | 82% | 48,921 psi | 85% | 1883 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 26,774 psi | 47% | 1099 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 38,319 psi | 67% | 1795 fps | 97.5% |
| IMR 4227 | <<locked>> | 96% | 49,414 psi | 86% | 1886 fps | 99.9% |
| Lovex D060 | <<locked>> | 90% | 51,227 psi | 89% | 1919 fps | 99.4% |
| Lovex D063 | <<locked>> | 86% | 50,415 psi | 88% | 1903 fps | 99.4% |
| Lovex S040 | <<locked>> | 82% | 49,530 psi | 86% | 1795 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 51,590 psi | 90% | 1906 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 36,680 psi | 64% | 1831 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 25,034 psi | 44% | 1119 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 98% | 50,488 psi | 88% | 1936 fps | 99.9% |
| Shooters World Blackout | <<locked>> | 86% | 50,415 psi | 88% | 1903 fps | 99.4% |
| Shooters World Buffalo Rifle | <<locked>> | 90% | 51,227 psi | 89% | 1919 fps | 99.4% |
| Shooters World SOCOM | <<locked>> | 90% | 51,590 psi | 90% | 1903 fps | 99.7% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 47,297 psi | 82% | 1759 fps | 100% |
| Vihtavuori N110 | <<locked>> | 94% | 51,532 psi | 90% | 1847 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 42,163 psi | 73% | 1854 fps | 100% |
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>> | 88% | 33,910 psi | 59% | 1699 fps | 95.1% |
| Accurate 5744 | <<locked>> | 80% | 44,454 psi | 77% | 1837 fps | 98.6% |
| Accurate No. 11 FS | <<locked>> | 80% | 39,436 psi | 69% | 1765 fps | 99.7% |
| ADI AR 2205 | <<locked>> | 80% | 36,666 psi | 64% | 1670 fps | 100% |
| ADI AR 2207 | <<locked>> | 84% | 23,786 psi | 41% | 1585 fps | 95.7% |
| Alliant Reloder-7 | <<locked>> | 90% | 31,198 psi | 54% | 1693 fps | 95.1% |
| Hodgdon LilGun | <<locked>> | 80% | 45,252 psi | 79% | 1850 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,434 psi | 32% | 971 fps | 100% |
| IMR 4198 | <<locked>> | 94% | 31,908 psi | 55% | 1693 fps | 95.5% |
| IMR 4227 | 13.8 gr | 80% | 28,805 psi | 50% | 1604 fps | 96.3% |
| Lovex D060 | <<locked>> | 80% | 37,057 psi | 64% | 1732 fps | 97.1% |
| Lovex D063 | <<locked>> | 80% | 41,191 psi | 72% | 1795 fps | 98.1% |
| Lovex S040 | <<locked>> | 80% | 46,775 psi | 81% | 1768 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 27,006 psi | 47% | 1581 fps | 98.7% |
| Norma 200 | <<locked>> | 96% | 31,212 psi | 54% | 1745 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 17,085 psi | 30% | 988 fps | 100% |
| ReloadSwiss RS 36 | 14.7 gr | 80% | 27,079 psi | 47% | 1608 fps | 95.4% |
| Shooters World Blackout | <<locked>> | 80% | 41,191 psi | 72% | 1795 fps | 98.1% |
| Shooters World Buffalo Rifle | 14.1 gr | 80% | 37,057 psi | 64% | 1732 fps | 97.1% |
| Shooters World SOCOM | <<locked>> | 80% | 36,390 psi | 63% | 1719 fps | 97.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 26,049 psi | 45% | 1496 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 32,372 psi | 56% | 1634 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 21,161 psi | 37% | 1506 fps | 95.6% |
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 | 154gr | MEN SF. ReloadSwiss RS 36 delivers the highest muzzle velocity at 1,936 fps; across all powders the maximum-charge window runs from 1,099 fps to 1,936 fps. ADI AR 2207 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 44–90 %, leaving at least 10 % headroom. The 154.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. ADI AR 2207, Alliant Reloder-7, Hodgdon TrailBoss 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. ReloadSwiss RS 36, IMR 4227, Shooters World Buffalo Rifle rank at the top here: for .300 HAM'R with the .308 | 154gr | MEN SF 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.