Load Specifications
Load data in caliber .300 HAM'R with .308 | 140gr | CutEdge MTH bullet and 22 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% | 49,850 psi | 87% | 2001 fps | 97.7% |
| Accurate 5744 | <<locked>> | 86% | 51,242 psi | 89% | 2028 fps | 98.8% |
| Accurate No. 11 FS | <<locked>> | 88% | 49,545 psi | 86% | 1991 fps | 100% |
| ADI AR 2205 | <<locked>> | 92% | 50,981 psi | 89% | 1939 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 39,001 psi | 68% | 1949 fps | 99.2% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 41,307 psi | 72% | 1942 fps | 97% |
| Hodgdon LilGun | <<locked>> | 84% | 49,153 psi | 85% | 2005 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 25,672 psi | 45% | 1155 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 36,506 psi | 63% | 1864 fps | 95.9% |
| IMR 4227 | <<locked>> | 98% | 49,922 psi | 87% | 2001 fps | 99.6% |
| Lovex D060 | <<locked>> | 92% | 51,242 psi | 89% | 2028 fps | 98.8% |
| Lovex D063 | <<locked>> | 88% | 51,779 psi | 90% | 2024 fps | 99% |
| Lovex S040 | <<locked>> | 84% | 50,227 psi | 87% | 1913 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 49,153 psi | 85% | 1991 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 23,844 psi | 41% | 1171 fps | 100% |
| ReloadSwiss RS 36ᴾ | <<locked>> | 100% | 50,314 psi | 88% | 2044 fps | 99.6% |
| Shooters World Blackout | <<locked>> | 88% | 51,779 psi | 90% | 2024 fps | 99% |
| Shooters World Buffalo Rifle | <<locked>> | 92% | 51,242 psi | 89% | 2028 fps | 98.8% |
| Shooters World SOCOM | <<locked>> | 90% | 49,168 psi | 86% | 1982 fps | 99% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 44,730 psi | 78% | 1841 fps | 100% |
| Vihtavuori N110 | <<locked>> | 96% | 51,488 psi | 90% | 1962 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 39,581 psi | 69% | 1929 fps | 99.8% |
Start Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 94% | 40,045 psi | 70% | 1880 fps | 95.7% |
| Accurate 5744 | <<locked>> | 80% | 42,351 psi | 74% | 1909 fps | 97.4% |
| Accurate No. 11 FS | <<locked>> | 80% | 37,072 psi | 64% | 1834 fps | 99% |
| ADI AR 2205 | <<locked>> | 80% | 34,330 psi | 60% | 1732 fps | 99.5% |
| ADI AR 2207 | <<locked>> | 88% | 25,469 psi | 44% | 1713 fps | 95.3% |
| Alliant Reloder-7 | <<locked>> | 96% | 36,274 psi | 63% | 1870 fps | 95.7% |
| Hodgdon LilGun | <<locked>> | 80% | 42,177 psi | 73% | 1929 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 17,709 psi | 31% | 1024 fps | 100% |
| IMR 4198 | <<locked>> | 98% | 33,997 psi | 59% | 1821 fps | 95% |
| IMR 4227 | <<locked>> | 82% | 28,964 psi | 50% | 1696 fps | 95.2% |
| Lovex D060 | <<locked>> | 80% | 35,433 psi | 62% | 1804 fps | 95.5% |
| Lovex D063 | <<locked>> | 80% | 38,841 psi | 68% | 1860 fps | 96.7% |
| Lovex S040 | <<locked>> | 80% | 44,092 psi | 77% | 1847 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 25,527 psi | 44% | 1644 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 16,288 psi | 28% | 1037 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 84% | 29,051 psi | 51% | 1736 fps | 95.1% |
| Shooters World Blackout | <<locked>> | 80% | 38,841 psi | 68% | 1860 fps | 96.7% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 35,433 psi | 62% | 1804 fps | 95.5% |
| Shooters World SOCOM | <<locked>> | 80% | 34,272 psi | 60% | 1781 fps | 96% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 24,337 psi | 42% | 1558 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 30,763 psi | 53% | 1713 fps | 100% |
| Vihtavuori N120 | <<locked>> | 84% | 22,800 psi | 40% | 1627 fps | 95.2% |
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 | 140gr | CutEdge MTH. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,044 fps; across all powders the maximum-charge window runs from 1,155 fps to 2,044 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 41–90 %, leaving at least 10 % headroom. The 140.0 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. 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.