Load Specifications
Load data in caliber .280 Riml. N.E. Ross with .284 | 140gr | Speer TBBC bullet and 28 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Hodgdon Retumbo and ReloadSwiss RS 76.
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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 86% | 40,030 psi | 85% | 2769 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 84% | 42,032 psi | 89% | 2851 fps | 96.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,843 psi | 89% | 2933 fps | 98.7% |
| Alliant Reloder-19 | <<locked>> | 84% | 41,887 psi | 89% | 2841 fps | 96.7% |
| Alliant Reloder-22 | <<locked>> | 86% | 39,987 psi | 85% | 2844 fps | 96.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 40,973 psi | 87% | 2854 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 40,567 psi | 86% | 2890 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 86% | 42,612 psi | 90% | 2963 fps | 99.8% |
| Bofors RP15 | <<locked>> | 90% | 42,322 psi | 90% | 2894 fps | 96.8% |
| Bofors RP30 | <<locked>> | 96% | 42,525 psi | 90% | 2930 fps | 96.3% |
| Bofors RP5 | <<locked>> | 86% | 39,987 psi | 85% | 2844 fps | 96.3% |
| Hodgdon H1000 | <<locked>> | 94% | 42,192 psi | 90% | 2877 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 42,511 psi | 90% | 2808 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 42,279 psi | 90% | 2989 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,854 psi | 78% | 1923 fps | 100% |
| Lovex S071 | <<locked>> | 92% | 41,597 psi | 88% | 2802 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 37,275 psi | 79% | 2848 fps | 96.7% |
| Norma MRP | <<locked>> | 86% | 42,047 psi | 89% | 2920 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 92% | 42,264 psi | 90% | 2884 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,724 psi | 80% | 1972 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 42,090 psi | 89% | 2979 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 84% | 41,292 psi | 88% | 2831 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,930 psi | 87% | 2825 fps | 96.6% |
| Somchem S385 | <<locked>> | 84% | 41,872 psi | 89% | 2812 fps | 97.6% |
| Vihtavuori N165 | <<locked>> | 88% | 41,408 psi | 88% | 2792 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 84% | 40,147 psi | 85% | 2822 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 90% | 39,842 psi | 85% | 2959 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 41,017 psi | 87% | 2792 fps | 96.4% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 32,750 psi | 69% | 2595 fps | 96.4% |
| ADI AR 2209 | <<locked>> | 82% | 39,349 psi | 83% | 2789 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 94% | 34,447 psi | 73% | 2740 fps | 96% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,291 psi | 83% | 2782 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 84% | 37,434 psi | 79% | 2782 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,328 psi | 66% | 2625 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,298 psi | 62% | 2582 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 34,040 psi | 72% | 2759 fps | 98.3% |
| Bofors RP15 | <<locked>> | 86% | 37,115 psi | 79% | 2772 fps | 95% |
| Bofors RP30 | <<locked>> | 94% | 39,595 psi | 84% | 2864 fps | 95.3% |
| Bofors RP5 | <<locked>> | 84% | 37,434 psi | 79% | 2782 fps | 95.4% |
| Hodgdon H1000 | <<locked>> | 92% | 39,537 psi | 84% | 2815 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,755 psi | 84% | 2753 fps | 100% |
| Hodgdon Retumbo | 64.5 gr | 90% | 37,028 psi | 79% | 2851 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,586 psi | 59% | 1719 fps | 100% |
| Lovex S071 | <<locked>> | 82% | 30,023 psi | 64% | 2520 fps | 95.2% |
| Norma 217 | <<locked>> | 98% | 34,925 psi | 74% | 2785 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 33,953 psi | 72% | 2720 fps | 95.5% |
| Ramshot Magnum | <<locked>> | 88% | 36,405 psi | 77% | 2746 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,239 psi | 60% | 1765 fps | 100% |
| ReloadSwiss RS 76 | 67.5 gr | 88% | 33,881 psi | 72% | 2759 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 82% | 38,406 psi | 81% | 2766 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,116 psi | 81% | 2759 fps | 95.6% |
| Somchem S385 | <<locked>> | 80% | 36,637 psi | 78% | 2690 fps | 96.1% |
| Vihtavuori N165 | <<locked>> | 84% | 36,143 psi | 77% | 2671 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 35,099 psi | 74% | 2703 fps | 99% |
| Winchester StaBALL HD | 58.9 gr | 80% | 27,804 psi | 59% | 2625 fps | 99.1% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,363 psi | 81% | 2730 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 28 powders for .280 Riml. N.E. Ross loaded with the .284 | 140gr | Speer TBBC. Hodgdon Retumbo delivers the highest muzzle velocity at 2,989 fps; across all powders the maximum-charge window runs from 1,923 fps to 2,989 fps. ADI AR 2225 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 (325 MPa), the top charges use 78–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Hodgdon TrailBoss, Norma 217 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. Winchester StaBALL HD, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .280 Riml. N.E. Ross with the .284 | 140gr | Speer TBBC 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.