Load Specifications
Load data in caliber .300 HAM'R with .3085 | 170gr | Prvi Partizan Grom bullet and 28 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 36, Shooters World Buffalo Rifle and Lovex D060.
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>> | 98% | 51,474 psi | 90% | 1801 fps | 99.3% |
| Accurate 5744 | <<locked>> | 82% | 49,705 psi | 86% | 1785 fps | 99.6% |
| Accurate LT-30ᴾ | <<locked>> | 100% | 45,078 psi | 78% | 1722 fps | 96.1% |
| Accurate No. 11 FS | <<locked>> | 86% | 51,169 psi | 89% | 1778 fps | 100% |
| ADI AR 2205 | <<locked>> | 88% | 49,559 psi | 86% | 1703 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 44,048 psi | 77% | 1788 fps | 100% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 35,085 psi | 61% | 1696 fps | 96.9% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 46,615 psi | 81% | 1791 fps | 99.3% |
| Baschieri & Pellagri 106ᴾ | <<locked>> | 100% | 42,902 psi | 75% | 1722 fps | 95.8% |
| Hodgdon H4198ᴾ | <<locked>> | 100% | 50,589 psi | 88% | 1791 fps | 96.7% |
| Hodgdon LilGun | <<locked>> | 82% | 50,807 psi | 88% | 1778 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,253 psi | 47% | 1033 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 39,929 psi | 69% | 1709 fps | 98.6% |
| IMR 4227 | <<locked>> | 96% | 51,242 psi | 89% | 1788 fps | 100% |
| Lovex D060 | <<locked>> | 88% | 49,705 psi | 86% | 1785 fps | 99.6% |
| Lovex D063 | <<locked>> | 84% | 49,443 psi | 86% | 1778 fps | 99.7% |
| Lovex S040 | <<locked>> | 82% | 50,749 psi | 88% | 1690 fps | 100% |
| Lovex S053 | <<locked>> | 98% | 50,749 psi | 88% | 1775 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 38,580 psi | 67% | 1745 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 25,614 psi | 45% | 1050 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 96% | 49,327 psi | 86% | 1804 fps | 100% |
| Shooters World Blackout | <<locked>> | 84% | 49,443 psi | 86% | 1778 fps | 99.7% |
| Shooters World Buffalo Rifle | <<locked>> | 88% | 49,705 psi | 86% | 1785 fps | 99.6% |
| Shooters World SOCOM | <<locked>> | 88% | 50,024 psi | 87% | 1772 fps | 99.9% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 49,429 psi | 86% | 1663 fps | 100% |
| Vihtavuori N110 | <<locked>> | 92% | 50,676 psi | 88% | 1719 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 44,556 psi | 77% | 1762 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 34,418 psi | 60% | 1640 fps | 96.2% |
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% | 30,951 psi | 54% | 1555 fps | 95.1% |
| Accurate 5744 | <<locked>> | 80% | 46,137 psi | 80% | 1745 fps | 99.3% |
| Accurate LT-30 | <<locked>> | 98% | 42,583 psi | 74% | 1696 fps | 95.5% |
| Accurate No. 11 FS | <<locked>> | 80% | 41,408 psi | 72% | 1680 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 37,869 psi | 66% | 1581 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 21,973 psi | 38% | 1453 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 96% | 30,313 psi | 53% | 1624 fps | 95.3% |
| Alliant Reloder-7 | <<locked>> | 86% | 28,819 psi | 50% | 1552 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 98% | 39,871 psi | 69% | 1686 fps | 95% |
| Hodgdon H4198 | <<locked>> | 96% | 44,309 psi | 77% | 1722 fps | 95.3% |
| Hodgdon LilGun | <<locked>> | 80% | 47,834 psi | 83% | 1752 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,449 psi | 32% | 906 fps | 100% |
| IMR 4198 | <<locked>> | 90% | 29,312 psi | 51% | 1552 fps | 95.6% |
| IMR 4227 | <<locked>> | 80% | 30,385 psi | 53% | 1532 fps | 97.7% |
| Lovex D060 | 13.5 gr | 80% | 38,885 psi | 68% | 1654 fps | 98.3% |
| Lovex D063 | <<locked>> | 80% | 42,395 psi | 74% | 1699 fps | 99% |
| Lovex S040 | <<locked>> | 80% | 47,805 psi | 83% | 1663 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 28,500 psi | 50% | 1509 fps | 99.5% |
| Norma 200 | <<locked>> | 92% | 28,703 psi | 50% | 1601 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 17,187 psi | 30% | 922 fps | 100% |
| ReloadSwiss RS 36 | 14 gr | 80% | 28,369 psi | 49% | 1532 fps | 96.9% |
| Shooters World Blackout | <<locked>> | 80% | 42,395 psi | 74% | 1699 fps | 99% |
| Shooters World Buffalo Rifle | 13.5 gr | 80% | 38,885 psi | 68% | 1654 fps | 98.3% |
| Shooters World SOCOM | <<locked>> | 80% | 37,478 psi | 65% | 1631 fps | 98.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 27,108 psi | 47% | 1417 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 33,924 psi | 59% | 1549 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 22,568 psi | 39% | 1447 fps | 97.4% |
| Vihtavuori N130 | <<locked>> | 98% | 32,401 psi | 56% | 1611 fps | 95.5% |
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 28 powders for .300 HAM'R loaded with the .3085 | 170gr | Prvi Partizan Grom. ReloadSwiss RS 36 delivers the highest muzzle velocity at 1,804 fps; across all powders the maximum-charge window runs from 1,033 fps to 1,804 fps. Accurate LT-30 gives the best case fill at 100 %, and 28 of the 28 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 170.0 gr projectile in 0.3085" 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. ReloadSwiss RS 36, Shooters World Buffalo Rifle, Lovex D060 rank at the top here: for .300 HAM'R with the .3085 | 170gr | Prvi Partizan Grom 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.