Load Specifications
Load data in caliber .300 HAM'R with .311 | 150gr | Speer Hot-Cor bullet and 26 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 36, Lovex S053 and Accurate 1680.
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% | 50,836 psi | 88% | 1995 fps | 99.2% |
| Accurate 5744 | <<locked>> | 82% | 51,445 psi | 89% | 2005 fps | 99.7% |
| Accurate LT-30ᴾ | <<locked>> | 100% | 48,153 psi | 84% | 1952 fps | 96.6% |
| Accurate No. 11 FS | <<locked>> | 84% | 49,893 psi | 87% | 1962 fps | 100% |
| ADI AR 2205 | <<locked>> | 88% | 51,677 psi | 90% | 1916 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 47,587 psi | 83% | 2021 fps | 100% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 37,260 psi | 65% | 1909 fps | 97.1% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 50,053 psi | 87% | 2024 fps | 99.5% |
| Baschieri & Pellagri 106ᴾ | <<locked>> | 100% | 45,527 psi | 79% | 1942 fps | 96.3% |
| Hodgdon H4198 | <<locked>> | 98% | 50,647 psi | 88% | 1991 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,499 psi | 48% | 1161 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 42,163 psi | 73% | 1929 fps | 98.8% |
| IMR 4227 | <<locked>> | 94% | 50,952 psi | 89% | 1985 fps | 100% |
| Lovex D060 | <<locked>> | 86% | 49,095 psi | 85% | 1978 fps | 99.5% |
| Lovex D063 | <<locked>> | 84% | 51,605 psi | 90% | 2001 fps | 99.8% |
| Lovex S053 | <<locked>> | 96% | 50,633 psi | 88% | 1972 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 41,742 psi | 73% | 1972 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 25,831 psi | 45% | 1178 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 96% | 51,967 psi | 90% | 2031 fps | 100% |
| Shooters World Blackout | <<locked>> | 84% | 51,605 psi | 90% | 2001 fps | 99.8% |
| Shooters World Buffalo Rifle | <<locked>> | 86% | 49,095 psi | 85% | 1978 fps | 99.5% |
| Shooters World SOCOM | <<locked>> | 86% | 49,559 psi | 86% | 1965 fps | 99.8% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 51,358 psi | 89% | 1867 fps | 100% |
| Vihtavuori N110 | <<locked>> | 90% | 50,241 psi | 87% | 1909 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 48,066 psi | 84% | 1991 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 36,985 psi | 64% | 1854 fps | 96.6% |
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 | 18.7 gr | 84% | 32,576 psi | 57% | 1749 fps | 95.4% |
| Accurate 5744 | <<locked>> | 80% | 48,327 psi | 84% | 1969 fps | 99.5% |
| Accurate LT-30 | <<locked>> | 96% | 41,698 psi | 73% | 1870 fps | 95.1% |
| Accurate No. 11 FS | <<locked>> | 80% | 43,105 psi | 75% | 1886 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 39,262 psi | 68% | 1775 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 23,409 psi | 41% | 1634 fps | 96% |
| Alliant Reloder-10x | <<locked>> | 96% | 32,387 psi | 56% | 1827 fps | 95.6% |
| Alliant Reloder-7 | <<locked>> | 86% | 30,748 psi | 53% | 1752 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 98% | 42,148 psi | 73% | 1900 fps | 95.5% |
| Hodgdon H4198 | <<locked>> | 94% | 43,859 psi | 76% | 1906 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 19,406 psi | 34% | 1033 fps | 100% |
| IMR 4198 | <<locked>> | 88% | 28,921 psi | 50% | 1709 fps | 95% |
| IMR 4227 | <<locked>> | 80% | 31,676 psi | 55% | 1722 fps | 97.8% |
| Lovex D060 | <<locked>> | 80% | 40,524 psi | 70% | 1860 fps | 98.4% |
| Lovex D063 | <<locked>> | 80% | 44,599 psi | 78% | 1916 fps | 99.1% |
| Lovex S053 | 15.3 gr | 80% | 30,095 psi | 52% | 1699 fps | 99.6% |
| Norma 200 | <<locked>> | 90% | 28,718 psi | 50% | 1762 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 18,057 psi | 31% | 1047 fps | 100% |
| ReloadSwiss RS 36 | 16.6 gr | 80% | 30,052 psi | 52% | 1729 fps | 97.2% |
| Shooters World Blackout | <<locked>> | 80% | 44,599 psi | 78% | 1916 fps | 99.1% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 40,524 psi | 70% | 1860 fps | 98.4% |
| Shooters World SOCOM | <<locked>> | 80% | 39,479 psi | 69% | 1837 fps | 98.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 28,543 psi | 50% | 1594 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 35,810 psi | 62% | 1745 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 23,960 psi | 42% | 1627 fps | 97.6% |
| Vihtavuori N130 | <<locked>> | 96% | 32,285 psi | 56% | 1781 fps | 95.1% |
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 26 powders for .300 HAM'R loaded with the .311 | 150gr | Speer Hot-Cor. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,031 fps; across all powders the maximum-charge window runs from 1,161 fps to 2,031 fps. Accurate LT-30 gives the best case fill at 100 %, and 26 of the 26 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 150.0 gr projectile in 0.311" calls for a 1:16.5 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. ReloadSwiss RS 36, Lovex S053, Accurate 1680 rank at the top here: for .300 HAM'R with the .311 | 150gr | Speer Hot-Cor 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.