Load Specifications
Load data in caliber .280 Riml. N.E. Ross with .284 | 158gr | Sellier & Bellot XRG bullet and 37 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% | 42,641 psi | 90% | 2667 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 41,394 psi | 88% | 2684 fps | 97.6% |
| ADI AR 2213 | <<locked>> | 86% | 42,293 psi | 90% | 2736 fps | 96.7% |
| ADI AR 2217 | <<locked>> | 94% | 40,828 psi | 87% | 2703 fps | 96.6% |
| ADI AR 2225 | <<locked>> | 98% | 41,640 psi | 88% | 2785 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 41,989 psi | 89% | 2690 fps | 97.8% |
| Alliant Reloder-19 | <<locked>> | 82% | 41,582 psi | 88% | 2684 fps | 97.7% |
| Alliant Reloder-22 | <<locked>> | 86% | 42,453 psi | 90% | 2743 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 86% | 40,843 psi | 87% | 2687 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 40,292 psi | 85% | 2733 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 84% | 42,409 psi | 90% | 2795 fps | 100% |
| Bofors RP15 | <<locked>> | 88% | 42,105 psi | 89% | 2736 fps | 97.9% |
| Bofors RP30 | <<locked>> | 94% | 42,496 psi | 90% | 2776 fps | 97.5% |
| Bofors RP5 | <<locked>> | 86% | 42,453 psi | 90% | 2743 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 92% | 41,698 psi | 88% | 2723 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 84% | 42,250 psi | 90% | 2680 fps | 96% |
| Hodgdon Retumbo | <<locked>> | 92% | 42,192 psi | 90% | 2838 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,115 psi | 79% | 1804 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 41,162 psi | 87% | 2621 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 86% | 40,872 psi | 87% | 2720 fps | 96.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 39,958 psi | 85% | 2746 fps | 96.6% |
| Lovex S071 | <<locked>> | 90% | 41,408 psi | 88% | 2644 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 40,147 psi | 85% | 2776 fps | 98.7% |
| Norma MRP | <<locked>> | 84% | 41,756 psi | 89% | 2756 fps | 99% |
| Ramshot Grand | <<locked>> | 86% | 40,611 psi | 86% | 2726 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 90% | 41,887 psi | 89% | 2726 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,072 psi | 81% | 1850 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 41,597 psi | 88% | 2822 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 82% | 40,785 psi | 87% | 2667 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 40,451 psi | 86% | 2661 fps | 97.6% |
| Somchem S385 | <<locked>> | 82% | 41,481 psi | 88% | 2651 fps | 98.5% |
| Vihtavuori N165 | <<locked>> | 86% | 40,988 psi | 87% | 2631 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 82% | 40,176 psi | 85% | 2661 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 41,843 psi | 89% | 2746 fps | 96.1% |
| Vihtavuori N565 | <<locked>> | 90% | 41,974 psi | 89% | 2736 fps | 96.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 40,103 psi | 85% | 2799 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 40,538 psi | 86% | 2631 fps | 97.4% |
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% | 34,838 psi | 74% | 2503 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 80% | 38,827 psi | 82% | 2628 fps | 96.9% |
| ADI AR 2213 | <<locked>> | 84% | 39,711 psi | 84% | 2680 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 92% | 38,130 psi | 81% | 2641 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 88% | 30,168 psi | 64% | 2484 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,262 psi | 83% | 2631 fps | 97% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,899 psi | 83% | 2625 fps | 97% |
| Alliant Reloder-22 | <<locked>> | 80% | 34,708 psi | 74% | 2569 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,460 psi | 71% | 2533 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,109 psi | 62% | 2444 fps | 96.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 36,593 psi | 78% | 2674 fps | 99.6% |
| Bofors RP15 | <<locked>> | 82% | 34,476 psi | 73% | 2559 fps | 95.4% |
| Bofors RP30 | <<locked>> | 90% | 36,999 psi | 78% | 2654 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 34,708 psi | 74% | 2569 fps | 95.7% |
| Hodgdon H1000 | <<locked>> | 88% | 36,564 psi | 78% | 2605 fps | 95.6% |
| Hodgdon H4831 | <<locked>> | 82% | 39,479 psi | 84% | 2621 fps | 95.1% |
| Hodgdon Retumbo | 57.9 gr | 84% | 32,329 psi | 69% | 2579 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,847 psi | 59% | 1614 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 38,754 psi | 82% | 2569 fps | 95% |
| IMR 7828 SSC | <<locked>> | 84% | 38,189 psi | 81% | 2654 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 98% | 37,507 psi | 80% | 2687 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 30,037 psi | 64% | 2382 fps | 96.6% |
| Norma 217 | <<locked>> | 92% | 30,835 psi | 65% | 2536 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 36,347 psi | 77% | 2638 fps | 97.7% |
| Ramshot Grand | <<locked>> | 84% | 37,666 psi | 80% | 2657 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 82% | 31,372 psi | 67% | 2480 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,572 psi | 61% | 1654 fps | 100% |
| ReloadSwiss RS 76 | 62 gr | 84% | 31,401 psi | 67% | 2552 fps | 96% |
| Rottweil R 905 | <<locked>> | 80% | 38,276 psi | 81% | 2612 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 37,942 psi | 80% | 2608 fps | 96.9% |
| Somchem S385 | <<locked>> | 80% | 38,812 psi | 82% | 2595 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 80% | 33,605 psi | 71% | 2467 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 80% | 37,507 psi | 80% | 2605 fps | 99.9% |
| Vihtavuori N560 | <<locked>> | 82% | 39,102 psi | 83% | 2684 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 88% | 39,233 psi | 83% | 2677 fps | 95.6% |
| Winchester StaBALL HD | 56.7 gr | 80% | 29,747 psi | 63% | 2556 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,302 psi | 75% | 2516 fps | 95.8% |
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 37 powders for .280 Riml. N.E. Ross loaded with the .284 | 158gr | Sellier & Bellot XRG. Hodgdon Retumbo delivers the highest muzzle velocity at 2,838 fps; across all powders the maximum-charge window runs from 1,804 fps to 2,838 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 37 of the 37 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 79–90 %, leaving at least 10 % headroom. The 158.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, IMR 8133 Enduron, 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 | 158gr | Sellier & Bellot XRG 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.