Load Specifications
Load data in caliber .300 HAM'R with .308 | 139gr | IBEX TRD bullet and 22 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 Accurate No. 11 FS.
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% | 49,705 psi | 86% | 2014 fps | 97.7% |
| Accurate 5744 | <<locked>> | 84% | 48,892 psi | 85% | 2011 fps | 98.5% |
| Accurate No. 11 FS | <<locked>> | 88% | 49,676 psi | 86% | 2005 fps | 100% |
| ADI AR 2205 | <<locked>> | 92% | 51,155 psi | 89% | 1952 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 39,117 psi | 68% | 1962 fps | 99.2% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 42,119 psi | 73% | 1965 fps | 97.2% |
| Hodgdon LilGun | <<locked>> | 84% | 49,385 psi | 86% | 2021 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 25,860 psi | 45% | 1165 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 36,622 psi | 64% | 1877 fps | 95.9% |
| IMR 4227 | <<locked>> | 98% | 50,067 psi | 87% | 2014 fps | 99.6% |
| Lovex D060 | <<locked>> | 90% | 48,892 psi | 85% | 2011 fps | 98.5% |
| Lovex D063 | <<locked>> | 88% | 51,880 psi | 90% | 2037 fps | 99% |
| Lovex S040 | <<locked>> | 84% | 50,647 psi | 88% | 1929 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 49,313 psi | 86% | 2008 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 24,033 psi | 42% | 1184 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 51,242 psi | 89% | 2067 fps | 99.6% |
| Shooters World Blackout | <<locked>> | 88% | 51,880 psi | 90% | 2037 fps | 99% |
| Shooters World Buffalo Rifle | <<locked>> | 90% | 48,892 psi | 85% | 2011 fps | 98.5% |
| Shooters World SOCOM | <<locked>> | 90% | 49,226 psi | 86% | 1998 fps | 99% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 45,005 psi | 78% | 1857 fps | 100% |
| Vihtavuori N110 | <<locked>> | 96% | 51,822 psi | 90% | 1978 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 39,682 psi | 69% | 1942 fps | 99.8% |
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>> | 94% | 40,030 psi | 70% | 1893 fps | 95.7% |
| Accurate 5744 | <<locked>> | 80% | 42,627 psi | 74% | 1926 fps | 97.4% |
| Accurate No. 11 FS | 16.2 gr | 80% | 37,304 psi | 65% | 1847 fps | 99% |
| ADI AR 2205 | <<locked>> | 80% | 34,621 psi | 60% | 1745 fps | 99.6% |
| ADI AR 2207 | <<locked>> | 88% | 25,672 psi | 45% | 1726 fps | 95.4% |
| Alliant Reloder-7 | <<locked>> | 96% | 36,376 psi | 63% | 1883 fps | 95.7% |
| Hodgdon LilGun | <<locked>> | 80% | 42,467 psi | 74% | 1946 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 17,956 psi | 31% | 1033 fps | 100% |
| IMR 4198 | <<locked>> | 98% | 34,142 psi | 59% | 1834 fps | 95% |
| IMR 4227 | <<locked>> | 82% | 29,254 psi | 51% | 1713 fps | 95.3% |
| Lovex D060 | 14.7 gr | 80% | 35,737 psi | 62% | 1821 fps | 95.6% |
| Lovex D063 | <<locked>> | 80% | 39,059 psi | 68% | 1873 fps | 96.7% |
| Lovex S040 | <<locked>> | 80% | 44,541 psi | 77% | 1864 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 25,831 psi | 45% | 1660 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 16,520 psi | 29% | 1050 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 84% | 29,269 psi | 51% | 1752 fps | 95.1% |
| Shooters World Blackout | <<locked>> | 80% | 39,059 psi | 68% | 1873 fps | 96.7% |
| Shooters World Buffalo Rifle | 14.7 gr | 80% | 35,737 psi | 62% | 1821 fps | 95.6% |
| Shooters World SOCOM | <<locked>> | 80% | 34,461 psi | 60% | 1795 fps | 96% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 24,700 psi | 43% | 1575 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 30,545 psi | 53% | 1716 fps | 100% |
| Vihtavuori N120 | <<locked>> | 84% | 23,003 psi | 40% | 1644 fps | 95.4% |
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 22 powders for .300 HAM'R loaded with the .308 | 139gr | IBEX TRD. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,067 fps; across all powders the maximum-charge window runs from 1,165 fps to 2,067 fps. Accurate 1680 gives the best case fill at 100 %, and 22 of the 22 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 139.0 gr projectile in 0.308" calls for a 1:13.5 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, Accurate No. 11 FS rank at the top here: for .300 HAM'R with the .308 | 139gr | IBEX TRD 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.