Load Specifications
Load data in caliber .300 HAM'R with .308 | 155gr | Peregrine Subsonic bullet and 23 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 1680 | <<locked>> | 96% | 46,528 psi | 85% | 1860 fps | 98.2% |
| Accurate 5744 | <<locked>> | 82% | 47,703 psi | 87% | 1873 fps | 99.1% |
| Accurate No. 11 FS | <<locked>> | 86% | 49,197 psi | 89% | 1873 fps | 100% |
| ADI AR 2205 | <<locked>> | 88% | 47,413 psi | 86% | 1791 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 42,482 psi | 77% | 1883 fps | 99.9% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 44,817 psi | 81% | 1880 fps | 98.6% |
| Hodgdon LilGun | <<locked>> | 82% | 48,950 psi | 89% | 1880 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 26,731 psi | 49% | 1096 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 39,015 psi | 71% | 1801 fps | 97.8% |
| IMR 4227 | <<locked>> | 96% | 49,385 psi | 90% | 1883 fps | 99.9% |
| Lovex D060 | <<locked>> | 88% | 48,559 psi | 88% | 1883 fps | 99.2% |
| Lovex D063 | <<locked>> | 84% | 47,703 psi | 87% | 1870 fps | 99.2% |
| Lovex S040 | <<locked>> | 82% | 49,501 psi | 90% | 1791 fps | 100% |
| Lovex S053 | <<locked>> | 98% | 48,863 psi | 89% | 1873 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 36,724 psi | 67% | 1827 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 25,019 psi | 45% | 1115 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 96% | 47,805 psi | 87% | 1903 fps | 99.8% |
| Shooters World Blackout | <<locked>> | 84% | 47,703 psi | 87% | 1870 fps | 99.2% |
| Shooters World Buffalo Rifle | <<locked>> | 88% | 48,559 psi | 88% | 1883 fps | 99.2% |
| Shooters World SOCOM | <<locked>> | 88% | 48,805 psi | 89% | 1870 fps | 99.5% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 47,297 psi | 86% | 1755 fps | 100% |
| Vihtavuori N110 | <<locked>> | 92% | 48,631 psi | 88% | 1814 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 43,004 psi | 78% | 1857 fps | 100% |
Start Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 88% | 34,548 psi | 63% | 1703 fps | 95.4% |
| Accurate 5744 | <<locked>> | 80% | 44,425 psi | 81% | 1834 fps | 98.7% |
| Accurate No. 11 FS | <<locked>> | 80% | 39,436 psi | 72% | 1762 fps | 99.8% |
| ADI AR 2205 | <<locked>> | 80% | 36,651 psi | 67% | 1667 fps | 100% |
| ADI AR 2207 | <<locked>> | 82% | 22,394 psi | 41% | 1552 fps | 95% |
| Alliant Reloder-7 | <<locked>> | 90% | 31,850 psi | 58% | 1699 fps | 95.5% |
| Hodgdon LilGun | <<locked>> | 80% | 45,295 psi | 82% | 1844 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,420 psi | 33% | 968 fps | 100% |
| IMR 4198 | <<locked>> | 94% | 32,503 psi | 59% | 1699 fps | 95.9% |
| IMR 4227 | <<locked>> | 80% | 29,399 psi | 53% | 1611 fps | 96.7% |
| Lovex D060 | <<locked>> | 80% | 37,739 psi | 69% | 1739 fps | 97.4% |
| Lovex D063 | <<locked>> | 80% | 41,176 psi | 75% | 1791 fps | 98.2% |
| Lovex S040 | <<locked>> | 80% | 46,760 psi | 85% | 1762 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 27,601 psi | 50% | 1588 fps | 99% |
| Norma 200 | <<locked>> | 94% | 29,414 psi | 53% | 1709 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 17,071 psi | 31% | 984 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 27,122 psi | 49% | 1604 fps | 95.6% |
| Shooters World Blackout | <<locked>> | 80% | 41,176 psi | 75% | 1791 fps | 98.2% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 37,739 psi | 69% | 1739 fps | 97.4% |
| Shooters World SOCOM | <<locked>> | 80% | 36,376 psi | 66% | 1716 fps | 97.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 26,078 psi | 47% | 1493 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 33,112 psi | 60% | 1640 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 21,640 psi | 39% | 1512 fps | 96% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 33 powders for .300 HAM'R loaded with the .308 | 155gr | Peregrine Subsonic. ReloadSwiss RS 36 delivers the highest muzzle velocity at 1,903 fps; across all powders the maximum-charge window runs from 1,096 fps to 1,903 fps. Accurate LT-30 gives the best case fill at 100 %, and 33 of the 33 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (396 MPa), the top charges use 45–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate LT-30, Accurate LT-32, ADI AR 2207 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. As outliers, Accurate LT-30, Accurate LT-32, ADI AR 2219 burn incompletely and react more sensitively to barrel length and temperature. 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.