Load Specifications
Load data in caliber .300 HAM'R with .31 | 123gr | Prvi Partizan FMJ bullet and 22 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>> | 98% | 48,979 psi | 85% | 2205 fps | 97.4% |
| Accurate 5744 | <<locked>> | 84% | 50,241 psi | 87% | 2234 fps | 98.5% |
| Accurate No. 11 FS | <<locked>> | 86% | 48,283 psi | 84% | 2192 fps | 99.9% |
| ADI AR 2205 | <<locked>> | 90% | 50,285 psi | 87% | 2142 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 41,626 psi | 72% | 2188 fps | 99.3% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 43,859 psi | 76% | 2185 fps | 97.2% |
| Hodgdon LilGun | <<locked>> | 82% | 48,240 psi | 84% | 2208 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 26,194 psi | 46% | 1302 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 38,029 psi | 66% | 2087 fps | 96% |
| IMR 4227 | <<locked>> | 98% | 51,880 psi | 90% | 2241 fps | 99.6% |
| Lovex D060 | <<locked>> | 90% | 50,966 psi | 89% | 2244 fps | 98.6% |
| Lovex D063 | <<locked>> | 86% | 50,067 psi | 87% | 2221 fps | 98.6% |
| Lovex S040 | <<locked>> | 84% | 51,924 psi | 90% | 2146 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 51,213 psi | 89% | 2231 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 24,874 psi | 43% | 1329 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 98% | 49,908 psi | 87% | 2257 fps | 99.4% |
| Shooters World Blackout | <<locked>> | 86% | 50,067 psi | 87% | 2221 fps | 98.6% |
| Shooters World Buffalo Rifle | <<locked>> | 90% | 50,966 psi | 89% | 2244 fps | 98.6% |
| Shooters World SOCOM | <<locked>> | 90% | 51,517 psi | 90% | 2228 fps | 99.1% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 46,891 psi | 82% | 2067 fps | 100% |
| Vihtavuori N110 | <<locked>> | 94% | 50,763 psi | 88% | 2169 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 42,163 psi | 73% | 2165 fps | 99.9% |
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>> | 92% | 39,450 psi | 69% | 2070 fps | 95.2% |
| Accurate 5744 | <<locked>> | 80% | 44,005 psi | 77% | 2142 fps | 97.4% |
| Accurate No. 11 FS | <<locked>> | 80% | 38,928 psi | 68% | 2057 fps | 99% |
| ADI AR 2205 | <<locked>> | 80% | 35,969 psi | 63% | 1946 fps | 99.6% |
| ADI AR 2207 | <<locked>> | 88% | 27,122 psi | 47% | 1923 fps | 95.5% |
| Alliant Reloder-7 | <<locked>> | 94% | 35,737 psi | 62% | 2054 fps | 95% |
| Hodgdon LilGun | <<locked>> | 80% | 44,483 psi | 77% | 2162 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,318 psi | 32% | 1158 fps | 100% |
| IMR 4198 | <<locked>> | 98% | 35,795 psi | 62% | 2047 fps | 95.2% |
| IMR 4227 | <<locked>> | 82% | 30,734 psi | 53% | 1913 fps | 95.5% |
| Lovex D060 | 17.1 gr | 80% | 36,709 psi | 64% | 2021 fps | 95.5% |
| Lovex D063 | <<locked>> | 80% | 40,437 psi | 70% | 2083 fps | 96.8% |
| Lovex S040 | <<locked>> | 80% | 45,788 psi | 80% | 2073 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 26,774 psi | 47% | 1841 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 16,824 psi | 29% | 1171 fps | 100% |
| ReloadSwiss RS 36 | 18.7 gr | 84% | 30,850 psi | 54% | 1952 fps | 95.3% |
| Shooters World Blackout | <<locked>> | 80% | 40,437 psi | 70% | 2083 fps | 96.8% |
| Shooters World Buffalo Rifle | 17.1 gr | 80% | 36,709 psi | 64% | 2021 fps | 95.5% |
| Shooters World SOCOM | <<locked>> | 80% | 35,708 psi | 62% | 1995 fps | 96.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 25,512 psi | 44% | 1749 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 32,256 psi | 56% | 1919 fps | 100% |
| Vihtavuori N120 | <<locked>> | 84% | 24,294 psi | 42% | 1831 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 22 powders for .300 HAM'R loaded with the .31 | 123gr | Prvi Partizan FMJ. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,257 fps; across all powders the maximum-charge window runs from 1,302 fps to 2,257 fps. ADI AR 2207 gives the best case fill at 100 %, and 22 of the 22 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (396 MPa), the top charges use 43–90 %, leaving at least 10 % headroom. The 123.0 gr projectile in 0.31" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. ADI AR 2207, Alliant Reloder-7, Hodgdon TrailBoss 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 .31 | 123gr | Prvi Partizan FMJ they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.