Load Specifications
Load data in caliber .300 HAM'R with .308 | 168gr | Sierra MatchKing bullet and 26 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% | 49,748 psi | 90% | 1818 fps | 99.3% |
| Accurate LT-30ᴾ | <<locked>> | 100% | 47,253 psi | 86% | 1781 fps | 96.9% |
| Accurate No. 11 FS | <<locked>> | 84% | 49,516 psi | 90% | 1795 fps | 100% |
| ADI AR 2205 | <<locked>> | 86% | 47,253 psi | 86% | 1713 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 45,890 psi | 83% | 1837 fps | 100% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 36,622 psi | 67% | 1749 fps | 97.5% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 48,182 psi | 88% | 1841 fps | 99.6% |
| Baschieri & Pellagri 106ᴾ | <<locked>> | 100% | 44,353 psi | 81% | 1772 fps | 96.5% |
| Hodgdon H4198 | <<locked>> | 98% | 49,313 psi | 90% | 1811 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,644 psi | 50% | 1056 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 41,568 psi | 76% | 1762 fps | 99.1% |
| IMR 4227 | <<locked>> | 94% | 49,559 psi | 90% | 1804 fps | 100% |
| Lovex D060 | <<locked>> | 86% | 48,414 psi | 88% | 1804 fps | 99.6% |
| Lovex D063 | <<locked>> | 82% | 46,978 psi | 85% | 1785 fps | 99.6% |
| Lovex S053 | <<locked>> | 96% | 49,226 psi | 90% | 1791 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 40,118 psi | 73% | 1795 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 26,034 psi | 47% | 1076 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 94% | 47,529 psi | 86% | 1818 fps | 100% |
| Shooters World Blackout | <<locked>> | 82% | 46,978 psi | 85% | 1785 fps | 99.6% |
| Shooters World Buffalo Rifle | <<locked>> | 86% | 48,414 psi | 88% | 1804 fps | 99.6% |
| Shooters World SOCOM | <<locked>> | 86% | 48,138 psi | 88% | 1785 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 98% | 48,254 psi | 88% | 1680 fps | 100% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 39,204 psi | 71% | 1759 fps | 95.8% |
| Vihtavuori N110 | <<locked>> | 90% | 48,660 psi | 88% | 1732 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 46,398 psi | 84% | 1811 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 35,810 psi | 65% | 1690 fps | 96.8% |
Start Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 84% | 31,792 psi | 58% | 1594 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 96% | 40,886 psi | 74% | 1706 fps | 95.4% |
| Accurate No. 11 FS | <<locked>> | 80% | 42,743 psi | 78% | 1722 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 38,595 psi | 70% | 1617 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 22,713 psi | 41% | 1493 fps | 96.4% |
| Alliant Reloder-10x | <<locked>> | 94% | 29,428 psi | 54% | 1637 fps | 95.2% |
| Alliant Reloder-7 | <<locked>> | 84% | 27,644 psi | 50% | 1558 fps | 95% |
| Baschieri & Pellagri 106 | <<locked>> | 96% | 38,595 psi | 70% | 1699 fps | 95% |
| Hodgdon H4198 | <<locked>> | 94% | 43,453 psi | 79% | 1745 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 19,160 psi | 35% | 935 fps | 100% |
| IMR 4198 | <<locked>> | 88% | 28,718 psi | 52% | 1568 fps | 95.6% |
| IMR 4227 | <<locked>> | 80% | 31,256 psi | 57% | 1575 fps | 98.2% |
| Lovex D060 | <<locked>> | 80% | 39,697 psi | 72% | 1696 fps | 98.6% |
| Lovex D063 | <<locked>> | 80% | 43,642 psi | 79% | 1745 fps | 99.3% |
| Lovex S053 | <<locked>> | 80% | 29,457 psi | 54% | 1549 fps | 99.7% |
| Norma 200 | <<locked>> | 90% | 27,905 psi | 51% | 1611 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 17,883 psi | 33% | 951 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 29,660 psi | 54% | 1581 fps | 97.6% |
| Shooters World Blackout | <<locked>> | 80% | 43,642 psi | 79% | 1745 fps | 99.3% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 39,697 psi | 72% | 1696 fps | 98.6% |
| Shooters World SOCOM | <<locked>> | 80% | 38,609 psi | 70% | 1673 fps | 98.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 28,268 psi | 51% | 1457 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 98% | 37,057 psi | 67% | 1729 fps | 95.2% |
| Vihtavuori N110 | <<locked>> | 80% | 35,215 psi | 64% | 1591 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 23,293 psi | 42% | 1486 fps | 97.9% |
| Vihtavuori N130 | <<locked>> | 96% | 31,299 psi | 57% | 1621 fps | 95.4% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 37 powders for .300 HAM'R loaded with the .308 | 168gr | Sierra MatchKing. Lovex D073.4 delivers the highest muzzle velocity at 1,847 fps; across all powders the maximum-charge window runs from 1,056 fps to 1,847 fps. Accurate 2015 gives the best case fill at 100 %, and 37 of the 37 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (396 MPa), the top charges use 47–90 %, leaving at least 10 % headroom. The 168.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate LT-30, Accurate LT-32 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 2015, Accurate LT-32, Hodgdon CFE BLK 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.