Load Specifications
Load data in caliber .300 HAM'R with .308 | 156gr | Reichenbeg HDB Ogival 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 ReloadSwiss RS 36.
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% | 48,921 psi | 85% | 1867 fps | 98.4% |
| Accurate 5744 | <<locked>> | 84% | 50,314 psi | 88% | 1886 fps | 99.3% |
| Accurate No. 11 FS | <<locked>> | 86% | 48,428 psi | 84% | 1847 fps | 100% |
| ADI AR 2205 | <<locked>> | 90% | 50,140 psi | 87% | 1801 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 41,800 psi | 73% | 1857 fps | 99.9% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 44,295 psi | 77% | 1857 fps | 98.4% |
| Hodgdon LilGun | <<locked>> | 84% | 51,822 psi | 90% | 1890 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 26,252 psi | 46% | 1079 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 38,421 psi | 67% | 1775 fps | 97.5% |
| IMR 4227 | <<locked>> | 96% | 48,588 psi | 84% | 1854 fps | 99.8% |
| Lovex D060 | <<locked>> | 90% | 50,314 psi | 88% | 1886 fps | 99.3% |
| Lovex D063 | <<locked>> | 86% | 50,575 psi | 88% | 1883 fps | 99.4% |
| Lovex S040 | <<locked>> | 82% | 49,139 psi | 85% | 1772 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 51,721 psi | 90% | 1883 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 36,187 psi | 63% | 1801 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 24,526 psi | 43% | 1096 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 98% | 49,879 psi | 87% | 1906 fps | 99.9% |
| Shooters World Blackout | <<locked>> | 86% | 50,575 psi | 88% | 1883 fps | 99.4% |
| Shooters World Buffalo Rifle | <<locked>> | 90% | 50,314 psi | 88% | 1886 fps | 99.3% |
| Shooters World SOCOM | <<locked>> | 90% | 50,952 psi | 89% | 1877 fps | 99.6% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 47,195 psi | 82% | 1739 fps | 100% |
| Vihtavuori N110 | <<locked>> | 94% | 51,343 psi | 89% | 1824 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 42,337 psi | 74% | 1834 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% | 34,040 psi | 59% | 1680 fps | 95.1% |
| Accurate 5744 | <<locked>> | 80% | 44,324 psi | 77% | 1814 fps | 98.6% |
| Accurate No. 11 FS | <<locked>> | 80% | 39,334 psi | 68% | 1745 fps | 99.7% |
| ADI AR 2205 | <<locked>> | 80% | 36,448 psi | 63% | 1647 fps | 100% |
| ADI AR 2207 | <<locked>> | 84% | 23,598 psi | 41% | 1565 fps | 95.6% |
| Alliant Reloder-7 | <<locked>> | 90% | 31,183 psi | 54% | 1673 fps | 95.1% |
| Hodgdon LilGun | <<locked>> | 80% | 45,121 psi | 78% | 1827 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,420 psi | 32% | 961 fps | 100% |
| IMR 4198 | <<locked>> | 94% | 31,865 psi | 55% | 1673 fps | 95.5% |
| IMR 4227 | <<locked>> | 80% | 28,514 psi | 50% | 1581 fps | 96.2% |
| Lovex D060 | 13.8 gr | 80% | 36,796 psi | 64% | 1709 fps | 97% |
| Lovex D063 | <<locked>> | 80% | 40,364 psi | 70% | 1762 fps | 98% |
| Lovex S040 | <<locked>> | 80% | 46,354 psi | 81% | 1742 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 26,687 psi | 46% | 1558 fps | 98.7% |
| Norma 200 | <<locked>> | 96% | 30,676 psi | 53% | 1716 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 17,071 psi | 30% | 974 fps | 100% |
| ReloadSwiss RS 36 | 14.4 gr | 80% | 26,890 psi | 47% | 1588 fps | 95.4% |
| Shooters World Blackout | <<locked>> | 80% | 40,364 psi | 70% | 1762 fps | 98% |
| Shooters World Buffalo Rifle | 13.8 gr | 80% | 36,796 psi | 64% | 1709 fps | 97% |
| Shooters World SOCOM | <<locked>> | 80% | 35,650 psi | 62% | 1690 fps | 97.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 25,614 psi | 45% | 1473 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 32,619 psi | 57% | 1621 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 20,943 psi | 36% | 1483 fps | 95.5% |
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 | 156gr | Reichenbeg HDB Ogival. ReloadSwiss RS 36 delivers the highest muzzle velocity at 1,906 fps; across all powders the maximum-charge window runs from 1,079 fps to 1,906 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 43–90 %, leaving at least 10 % headroom. The 156.0 gr projectile in 0.308" calls for a 1:12.5 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. Shooters World Buffalo Rifle, Lovex D060, ReloadSwiss RS 36 rank at the top here: for .300 HAM'R with the .308 | 156gr | Reichenbeg HDB Ogival 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.