Load Specifications
Load data in caliber .300 HAM'R with .308 | 125gr | Nosler AccuBond bullet and 21 powders. The key underlying parameters are shown in the table above.
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% | 47,921 psi | 83% | 2126 fps | 96.6% |
| Accurate 5744 | <<locked>> | 86% | 49,995 psi | 87% | 2162 fps | 98% |
| Accurate No. 11 FS | <<locked>> | 90% | 51,663 psi | 90% | 2169 fps | 99.9% |
| ADI AR 2205 | <<locked>> | 92% | 49,559 psi | 86% | 2073 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 37,521 psi | 65% | 2070 fps | 98.4% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 40,263 psi | 70% | 2070 fps | 95.8% |
| Hodgdon LilGun | <<locked>> | 86% | 50,763 psi | 88% | 2182 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 25,483 psi | 44% | 1250 fps | 100% |
| IMR 4227ᴾ | <<locked>> | 100% | 51,430 psi | 89% | 2169 fps | 99.3% |
| Lovex D060 | <<locked>> | 92% | 49,995 psi | 87% | 2162 fps | 98% |
| Lovex D063 | <<locked>> | 88% | 49,661 psi | 86% | 2149 fps | 98.1% |
| Lovex S040 | <<locked>> | 86% | 52,011 psi | 90% | 2087 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 47,239 psi | 82% | 2126 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 23,554 psi | 41% | 1266 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 49,110 psi | 85% | 2185 fps | 99% |
| Shooters World Blackout | <<locked>> | 88% | 49,661 psi | 86% | 2149 fps | 98.1% |
| Shooters World Buffalo Rifle | <<locked>> | 92% | 49,995 psi | 87% | 2162 fps | 98% |
| Shooters World SOCOM | <<locked>> | 92% | 50,995 psi | 89% | 2152 fps | 98.6% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 43,091 psi | 75% | 1972 fps | 100% |
| Vihtavuori N110 | <<locked>> | 96% | 49,516 psi | 86% | 2100 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 38,145 psi | 66% | 2051 fps | 99.3% |
Start Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 96% | 41,771 psi | 73% | 2041 fps | 95.1% |
| Accurate 5744 | <<locked>> | 80% | 41,133 psi | 72% | 2034 fps | 96.2% |
| Accurate No. 11 FS | <<locked>> | 80% | 35,578 psi | 62% | 1946 fps | 98% |
| ADI AR 2205 | <<locked>> | 80% | 33,634 psi | 58% | 1850 fps | 98.9% |
| ADI AR 2207 | <<locked>> | 92% | 28,137 psi | 49% | 1893 fps | 95.4% |
| Alliant Reloder-7 | <<locked>> | 98% | 37,550 psi | 65% | 2028 fps | 95% |
| Hodgdon LilGun | <<locked>> | 80% | 40,205 psi | 70% | 2057 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 17,521 psi | 30% | 1106 fps | 100% |
| IMR 4227 | <<locked>> | 86% | 32,155 psi | 56% | 1883 fps | 95.4% |
| Lovex D060 | <<locked>> | 84% | 39,146 psi | 68% | 2001 fps | 95.6% |
| Lovex D063 | <<locked>> | 80% | 37,260 psi | 65% | 1972 fps | 95.2% |
| Lovex S040 | <<locked>> | 80% | 42,960 psi | 75% | 1982 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 24,613 psi | 43% | 1745 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 16,012 psi | 28% | 1122 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 88% | 32,068 psi | 56% | 1923 fps | 95.1% |
| Shooters World Blackout | <<locked>> | 80% | 37,260 psi | 65% | 1972 fps | 95.2% |
| Shooters World Buffalo Rifle | <<locked>> | 84% | 39,146 psi | 68% | 2001 fps | 95.6% |
| Shooters World SOCOM | <<locked>> | 82% | 35,201 psi | 61% | 1926 fps | 95.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 23,438 psi | 41% | 1660 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 29,341 psi | 51% | 1821 fps | 100% |
| Vihtavuori N120 | <<locked>> | 88% | 25,425 psi | 44% | 1811 fps | 95.5% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 21 powders for .300 HAM'R loaded with the .308 | 125gr | Nosler AccuBond. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,185 fps; across all powders the maximum-charge window runs from 1,250 fps to 2,185 fps. Accurate 1680 gives the best case fill at 100 %, and 21 of the 21 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (396 MPa), the top charges use 41–90 %, leaving at least 10 % headroom. The 125.0 gr projectile in 0.308" calls for a 1:14.0 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. 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.