Load Specifications
Load data in caliber .280 Riml. N.E. Ross with .284 | 162gr | Hornady SST bullet and 39 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and ADI AR 2225.
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>> | 84% | 40,480 psi | 86% | 2595 fps | 99.5% |
| Accurate High Country | <<locked>> | 82% | 41,133 psi | 87% | 2717 fps | 96.9% |
| ADI AR 2209 | <<locked>> | 82% | 42,206 psi | 90% | 2671 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 84% | 40,306 psi | 86% | 2664 fps | 96.4% |
| ADI AR 2217 | <<locked>> | 94% | 41,495 psi | 88% | 2687 fps | 97.1% |
| ADI AR 2225 | <<locked>> | 98% | 42,221 psi | 90% | 2769 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 42,598 psi | 90% | 2671 fps | 98.1% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 42,598 psi | 90% | 2671 fps | 98.1% |
| Alliant Reloder-19 | <<locked>> | 82% | 42,177 psi | 89% | 2667 fps | 98.1% |
| Alliant Reloder-22 | <<locked>> | 84% | 40,495 psi | 86% | 2671 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 86% | 41,553 psi | 88% | 2671 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 41,017 psi | 87% | 2717 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 82% | 40,292 psi | 85% | 2723 fps | 100% |
| Bofors RP15 | <<locked>> | 86% | 40,176 psi | 85% | 2664 fps | 97.6% |
| Bofors RP30 | <<locked>> | 92% | 40,437 psi | 86% | 2703 fps | 97.2% |
| Bofors RP5 | <<locked>> | 84% | 40,495 psi | 86% | 2671 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 92% | 42,395 psi | 90% | 2710 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 84% | 42,264 psi | 90% | 2651 fps | 96.3% |
| Hodgdon Retumbo | <<locked>> | 90% | 40,147 psi | 85% | 2762 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,217 psi | 79% | 1781 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 41,887 psi | 89% | 2608 fps | 96.3% |
| IMR 7828 SSC | <<locked>> | 86% | 41,524 psi | 88% | 2703 fps | 96.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 40,799 psi | 87% | 2736 fps | 97.2% |
| Lovex S071 | <<locked>> | 90% | 42,090 psi | 89% | 2628 fps | 99.6% |
| Norma 217ᴾ | <<locked>> | 100% | 40,814 psi | 87% | 2759 fps | 99.1% |
| Norma MRP | <<locked>> | 84% | 42,525 psi | 90% | 2740 fps | 99.3% |
| Ramshot Grand | <<locked>> | 86% | 41,118 psi | 87% | 2710 fps | 97.2% |
| Ramshot Magnum | <<locked>> | 90% | 42,496 psi | 90% | 2710 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,971 psi | 81% | 1824 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 42,467 psi | 90% | 2812 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 82% | 41,379 psi | 88% | 2651 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 41,046 psi | 87% | 2644 fps | 98% |
| Somchem S385 | <<locked>> | 82% | 42,076 psi | 89% | 2635 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 86% | 41,640 psi | 88% | 2618 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 82% | 40,843 psi | 87% | 2641 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 42,583 psi | 90% | 2730 fps | 96.6% |
| Vihtavuori N565 | <<locked>> | 88% | 39,943 psi | 85% | 2664 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 88% | 41,075 psi | 87% | 2782 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 41,176 psi | 87% | 2615 fps | 97.8% |
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% | 35,418 psi | 75% | 2487 fps | 98.5% |
| Accurate High Country | <<locked>> | 80% | 38,363 psi | 81% | 2654 fps | 96.1% |
| ADI AR 2209 | <<locked>> | 80% | 39,392 psi | 84% | 2612 fps | 97.3% |
| ADI AR 2213 | <<locked>> | 82% | 37,666 psi | 80% | 2602 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 90% | 36,390 psi | 77% | 2572 fps | 95.2% |
| ADI AR 2225 | 60.4 gr | 88% | 30,690 psi | 65% | 2477 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,784 psi | 84% | 2615 fps | 97.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,784 psi | 84% | 2615 fps | 97.5% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,421 psi | 84% | 2608 fps | 97.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,302 psi | 75% | 2552 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,982 psi | 72% | 2513 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,559 psi | 63% | 2431 fps | 97.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,318 psi | 79% | 2657 fps | 99.8% |
| Bofors RP15 | <<locked>> | 80% | 32,851 psi | 70% | 2490 fps | 95% |
| Bofors RP30 | <<locked>> | 88% | 35,360 psi | 75% | 2589 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 35,302 psi | 75% | 2552 fps | 96.2% |
| Hodgdon H1000 | <<locked>> | 86% | 34,722 psi | 74% | 2533 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 82% | 39,479 psi | 84% | 2592 fps | 95.4% |
| Hodgdon Retumbo | 57.6 gr | 84% | 32,851 psi | 70% | 2569 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,891 psi | 59% | 1591 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 39,218 psi | 83% | 2552 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 84% | 38,783 psi | 82% | 2641 fps | 96% |
| IMR 8133 Enduron | <<locked>> | 96% | 35,752 psi | 76% | 2618 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 30,516 psi | 65% | 2369 fps | 97% |
| Norma 217 | <<locked>> | 92% | 31,285 psi | 66% | 2523 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 36,970 psi | 78% | 2621 fps | 98.1% |
| Ramshot Grand | <<locked>> | 82% | 35,737 psi | 76% | 2585 fps | 95.2% |
| Ramshot Magnum | <<locked>> | 82% | 31,923 psi | 68% | 2470 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,631 psi | 61% | 1634 fps | 100% |
| ReloadSwiss RS 76 | 60.2 gr | 82% | 29,776 psi | 63% | 2477 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 38,841 psi | 82% | 2595 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,508 psi | 82% | 2589 fps | 97.3% |
| Somchem S385 | <<locked>> | 80% | 39,363 psi | 84% | 2579 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 80% | 34,127 psi | 72% | 2454 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 80% | 38,116 psi | 81% | 2589 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 39,755 psi | 84% | 2671 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 86% | 37,333 psi | 79% | 2605 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,255 psi | 64% | 2546 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,868 psi | 76% | 2500 fps | 96.3% |
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 39 powders for .280 Riml. N.E. Ross loaded with the .284 | 162gr | Hornady SST. ReloadSwiss RS 76 delivers the highest muzzle velocity at 2,812 fps; across all powders the maximum-charge window runs from 1,781 fps to 2,812 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 39 of the 39 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 162.0 gr projectile in 0.284" calls for a 1:10.0 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. Hodgdon Retumbo, ReloadSwiss RS 76, ADI AR 2225 rank at the top here: for .280 Riml. N.E. Ross with the .284 | 162gr | Hornady SST 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.