Load Specifications
Load data in caliber .300 HAM'R with .311 | 123gr | Sellier & Bellot SP bullet and 22 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% | 49,429 psi | 86% | 2215 fps | 97.6% |
| Accurate 5744 | <<locked>> | 84% | 50,865 psi | 88% | 2247 fps | 98.7% |
| Accurate No. 11 FS | <<locked>> | 86% | 48,892 psi | 85% | 2201 fps | 99.9% |
| ADI AR 2205 | <<locked>> | 90% | 50,908 psi | 89% | 2156 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 42,206 psi | 73% | 2201 fps | 99.4% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 44,382 psi | 77% | 2195 fps | 97.4% |
| Hodgdon LilGun | <<locked>> | 82% | 48,979 psi | 85% | 2218 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 26,484 psi | 46% | 1309 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 38,508 psi | 67% | 2100 fps | 96.2% |
| IMR 4227 | <<locked>> | 96% | 49,414 psi | 86% | 2215 fps | 99.5% |
| Lovex D060 | <<locked>> | 90% | 50,865 psi | 88% | 2247 fps | 98.7% |
| Lovex D063 | <<locked>> | 86% | 50,676 psi | 88% | 2234 fps | 98.7% |
| Lovex S040 | <<locked>> | 82% | 49,574 psi | 86% | 2123 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 51,851 psi | 90% | 2244 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 24,613 psi | 43% | 1325 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 98% | 50,488 psi | 88% | 2267 fps | 99.5% |
| Shooters World Blackout | <<locked>> | 86% | 50,676 psi | 88% | 2234 fps | 98.7% |
| Shooters World Buffalo Rifle | <<locked>> | 90% | 50,865 psi | 88% | 2247 fps | 98.7% |
| Shooters World SOCOM | <<locked>> | 88% | 48,341 psi | 84% | 2188 fps | 98.8% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 46,862 psi | 81% | 2070 fps | 100% |
| Vihtavuori N110 | <<locked>> | 94% | 51,547 psi | 90% | 2182 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 42,728 psi | 74% | 2178 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% | 39,885 psi | 69% | 2080 fps | 95.4% |
| Accurate 5744 | <<locked>> | 80% | 44,614 psi | 78% | 2156 fps | 97.6% |
| Accurate No. 11 FS | <<locked>> | 80% | 39,508 psi | 69% | 2070 fps | 99.2% |
| ADI AR 2205 | <<locked>> | 80% | 36,535 psi | 64% | 1959 fps | 99.7% |
| ADI AR 2207 | <<locked>> | 88% | 27,601 psi | 48% | 1936 fps | 95.8% |
| Alliant Reloder-7 | <<locked>> | 94% | 36,245 psi | 63% | 2064 fps | 95.3% |
| Hodgdon LilGun | <<locked>> | 80% | 45,208 psi | 79% | 2175 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,130 psi | 32% | 1155 fps | 100% |
| IMR 4198 | <<locked>> | 98% | 36,274 psi | 63% | 2060 fps | 95.5% |
| IMR 4227 | <<locked>> | 82% | 30,777 psi | 54% | 1916 fps | 95.5% |
| Lovex D060 | 17.3 gr | 80% | 37,289 psi | 65% | 2034 fps | 95.8% |
| Lovex D063 | <<locked>> | 80% | 41,002 psi | 71% | 2096 fps | 97% |
| Lovex S040 | <<locked>> | 80% | 46,557 psi | 81% | 2087 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 27,311 psi | 47% | 1854 fps | 97.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 16,665 psi | 29% | 1168 fps | 100% |
| ReloadSwiss RS 36 | 18.9 gr | 84% | 31,357 psi | 55% | 1965 fps | 95.5% |
| Shooters World Blackout | <<locked>> | 80% | 41,002 psi | 71% | 2096 fps | 97% |
| Shooters World Buffalo Rifle | 17.3 gr | 80% | 37,289 psi | 65% | 2034 fps | 95.8% |
| Shooters World SOCOM | <<locked>> | 80% | 36,230 psi | 63% | 2008 fps | 96.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 26,063 psi | 45% | 1762 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 32,358 psi | 56% | 1923 fps | 100% |
| Vihtavuori N120 | <<locked>> | 84% | 24,337 psi | 42% | 1834 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 22 powders for .300 HAM'R loaded with the .311 | 123gr | Sellier & Bellot SP. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,267 fps; across all powders the maximum-charge window runs from 1,309 fps to 2,267 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. 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. ReloadSwiss RS 36, Shooters World Buffalo Rifle, Lovex D060 rank at the top here: for .300 HAM'R with the .311 | 123gr | Sellier & Bellot SP 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.