Load Specifications
Load data in caliber .300 HAM'R with .308 | 150gr | WM Bullets 30/30 Winchester 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, Accurate 1680 and Alliant Reloder-7.
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>> | 94% | 48,138 psi | 84% | 1975 fps | 99% |
| Accurate LT-30ᴾ | <<locked>> | 100% | 48,689 psi | 85% | 1969 fps | 96.9% |
| Accurate No. 11 FS | <<locked>> | 84% | 50,792 psi | 88% | 1982 fps | 100% |
| ADI AR 2205 | <<locked>> | 86% | 49,400 psi | 86% | 1903 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 48,414 psi | 84% | 2037 fps | 100% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 38,609 psi | 67% | 1939 fps | 97.6% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 50,720 psi | 88% | 2041 fps | 99.6% |
| Baschieri & Pellagri 106ᴾ | <<locked>> | 100% | 46,456 psi | 81% | 1965 fps | 96.7% |
| Hodgdon H4198 | <<locked>> | 98% | 51,271 psi | 89% | 2011 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,934 psi | 49% | 1175 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 43,555 psi | 76% | 1959 fps | 99.2% |
| IMR 4227 | <<locked>> | 94% | 51,866 psi | 90% | 2005 fps | 100% |
| Lovex D060 | <<locked>> | 86% | 50,053 psi | 87% | 1998 fps | 99.7% |
| Lovex D063 | <<locked>> | 82% | 49,240 psi | 86% | 1982 fps | 99.7% |
| Lovex S053 | <<locked>> | 96% | 51,576 psi | 90% | 1991 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 43,163 psi | 75% | 1998 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 26,281 psi | 46% | 1191 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 94% | 50,314 psi | 88% | 2024 fps | 100% |
| Shooters World Blackout | <<locked>> | 82% | 49,240 psi | 86% | 1982 fps | 99.7% |
| Shooters World Buffalo Rifle | <<locked>> | 86% | 50,053 psi | 87% | 1998 fps | 99.7% |
| Shooters World SOCOM | <<locked>> | 86% | 50,299 psi | 87% | 1982 fps | 99.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 98% | 50,024 psi | 87% | 1864 fps | 100% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 41,046 psi | 71% | 1949 fps | 96% |
| Vihtavuori N110 | <<locked>> | 90% | 50,647 psi | 88% | 1919 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 48,878 psi | 85% | 2011 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 37,608 psi | 65% | 1873 fps | 97% |
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 | 82% | 31,111 psi | 54% | 1729 fps | 95% |
| Accurate LT-30 | <<locked>> | 94% | 40,335 psi | 70% | 1860 fps | 95% |
| Accurate No. 11 FS | <<locked>> | 80% | 44,034 psi | 77% | 1906 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 40,205 psi | 70% | 1795 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 23,786 psi | 41% | 1650 fps | 96.4% |
| Alliant Reloder-10x | <<locked>> | 94% | 31,444 psi | 55% | 1821 fps | 95.5% |
| Alliant Reloder-7 | 17.7 gr | 84% | 28,935 psi | 50% | 1726 fps | 95.1% |
| Baschieri & Pellagri 106 | <<locked>> | 96% | 40,611 psi | 71% | 1890 fps | 95.3% |
| Hodgdon H4198 | <<locked>> | 94% | 45,237 psi | 79% | 1936 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 19,406 psi | 34% | 1037 fps | 100% |
| IMR 4198 | <<locked>> | 88% | 29,646 psi | 52% | 1732 fps | 95.6% |
| IMR 4227 | <<locked>> | 80% | 32,619 psi | 57% | 1745 fps | 98.2% |
| Lovex D060 | <<locked>> | 80% | 40,857 psi | 71% | 1877 fps | 98.6% |
| Lovex D063 | <<locked>> | 80% | 45,484 psi | 79% | 1939 fps | 99.3% |
| Lovex S053 | <<locked>> | 80% | 31,067 psi | 54% | 1722 fps | 99.8% |
| Norma 200 | <<locked>> | 90% | 29,472 psi | 51% | 1785 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 18,101 psi | 31% | 1053 fps | 100% |
| ReloadSwiss RS 36 | 17 gr | 80% | 30,908 psi | 54% | 1752 fps | 97.6% |
| Shooters World Blackout | <<locked>> | 80% | 45,484 psi | 79% | 1939 fps | 99.3% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 40,857 psi | 71% | 1877 fps | 98.6% |
| Shooters World SOCOM | <<locked>> | 80% | 40,277 psi | 70% | 1857 fps | 99% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 29,066 psi | 51% | 1608 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 98% | 38,450 psi | 67% | 1913 fps | 95.3% |
| Vihtavuori N110 | <<locked>> | 80% | 37,072 psi | 64% | 1768 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 24,323 psi | 42% | 1644 fps | 97.9% |
| Vihtavuori N130 | <<locked>> | 96% | 32,938 psi | 57% | 1801 fps | 95.6% |
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 .308 | 150gr | WM Bullets 30/30 Winchester. Alliant Reloder-7 delivers the highest muzzle velocity at 2,041 fps; across all powders the maximum-charge window runs from 1,175 fps to 2,041 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 46–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" 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, Accurate 1680, Alliant Reloder-7 rank at the top here: for .300 HAM'R with the .308 | 150gr | WM Bullets 30/30 Winchester 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.