Load Specifications
Load data in caliber .300 HAM'R with .308 | 165gr | Sierra SBT GameKing bullet and 27 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>> | 96% | 50,183 psi | 87% | 1847 fps | 99.3% |
| Accurate 5744 | <<locked>> | 82% | 51,140 psi | 89% | 1860 fps | 99.8% |
| Accurate LT-30ᴾ | <<locked>> | 100% | 46,934 psi | 82% | 1801 fps | 96.7% |
| Accurate No. 11 FS | <<locked>> | 84% | 49,472 psi | 86% | 1821 fps | 100% |
| ADI AR 2205 | <<locked>> | 88% | 50,836 psi | 88% | 1768 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 46,543 psi | 81% | 1870 fps | 100% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 36,434 psi | 63% | 1768 fps | 97.4% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 48,733 psi | 85% | 1870 fps | 99.6% |
| Baschieri & Pellagri 106ᴾ | <<locked>> | 100% | 44,541 psi | 77% | 1798 fps | 96.5% |
| Hodgdon H4198 | <<locked>> | 98% | 49,037 psi | 85% | 1834 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,499 psi | 48% | 1073 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 41,466 psi | 72% | 1785 fps | 99% |
| IMR 4227 | <<locked>> | 94% | 49,545 psi | 86% | 1827 fps | 100% |
| Lovex D060 | <<locked>> | 88% | 51,140 psi | 89% | 1860 fps | 99.8% |
| Lovex D063 | <<locked>> | 84% | 50,473 psi | 88% | 1847 fps | 99.8% |
| Lovex S053 | <<locked>> | 96% | 49,226 psi | 86% | 1818 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 40,596 psi | 71% | 1824 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 25,875 psi | 45% | 1089 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 96% | 50,879 psi | 88% | 1880 fps | 100% |
| Shooters World Blackout | <<locked>> | 84% | 50,473 psi | 88% | 1847 fps | 99.8% |
| Shooters World Buffalo Rifle | <<locked>> | 88% | 51,140 psi | 89% | 1860 fps | 99.8% |
| Shooters World SOCOM | <<locked>> | 88% | 51,561 psi | 90% | 1844 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 50,995 psi | 89% | 1729 fps | 100% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 39,711 psi | 69% | 1788 fps | 95.9% |
| Vihtavuori N110 | <<locked>> | 92% | 51,822 psi | 90% | 1785 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 47,036 psi | 82% | 1844 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 36,303 psi | 63% | 1719 fps | 96.9% |
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>> | 84% | 31,763 psi | 55% | 1617 fps | 95.6% |
| Accurate 5744 | <<locked>> | 80% | 47,718 psi | 83% | 1821 fps | 99.6% |
| Accurate LT-30 | <<locked>> | 96% | 41,452 psi | 72% | 1736 fps | 95.5% |
| Accurate No. 11 FS | <<locked>> | 80% | 42,815 psi | 74% | 1749 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 38,827 psi | 68% | 1644 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 22,902 psi | 40% | 1516 fps | 96.4% |
| Alliant Reloder-10x | <<locked>> | 94% | 29,385 psi | 51% | 1657 fps | 95% |
| Alliant Reloder-7 | <<locked>> | 86% | 29,994 psi | 52% | 1621 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 96% | 38,856 psi | 68% | 1726 fps | 95% |
| Hodgdon H4198 | <<locked>> | 94% | 43,308 psi | 75% | 1768 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 19,174 psi | 33% | 948 fps | 100% |
| IMR 4198 | <<locked>> | 88% | 28,834 psi | 50% | 1591 fps | 95.5% |
| IMR 4227 | <<locked>> | 80% | 31,517 psi | 55% | 1598 fps | 98.1% |
| Lovex D060 | 14.4 gr | 80% | 39,958 psi | 69% | 1722 fps | 98.6% |
| Lovex D063 | <<locked>> | 80% | 43,700 psi | 76% | 1772 fps | 99.2% |
| Lovex S053 | <<locked>> | 80% | 29,747 psi | 52% | 1575 fps | 99.7% |
| Norma 200 | <<locked>> | 90% | 27,876 psi | 48% | 1631 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 17,883 psi | 31% | 965 fps | 100% |
| ReloadSwiss RS 36 | 15 gr | 80% | 29,820 psi | 52% | 1608 fps | 97.5% |
| Shooters World Blackout | <<locked>> | 80% | 43,700 psi | 76% | 1772 fps | 99.2% |
| Shooters World Buffalo Rifle | 14.4 gr | 80% | 39,958 psi | 69% | 1722 fps | 98.6% |
| Shooters World SOCOM | <<locked>> | 80% | 38,667 psi | 67% | 1699 fps | 98.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 28,094 psi | 49% | 1473 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 98% | 36,883 psi | 64% | 1749 fps | 95% |
| Vihtavuori N110 | <<locked>> | 80% | 35,665 psi | 62% | 1617 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 23,482 psi | 41% | 1509 fps | 97.9% |
| Vihtavuori N130 | <<locked>> | 96% | 31,212 psi | 54% | 1644 fps | 95.3% |
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 27 powders for .300 HAM'R loaded with the .308 | 165gr | Sierra SBT GameKing. ReloadSwiss RS 36 delivers the highest muzzle velocity at 1,880 fps; across all powders the maximum-charge window runs from 1,073 fps to 1,880 fps. Accurate LT-30 gives the best case fill at 100 %, and 27 of the 27 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 165.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate LT-30, ADI AR 2207, Alliant Reloder-10x 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 | 165gr | Sierra SBT GameKing 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.