Load Specifications
Load data in caliber .280 Riml. N.E. Ross with .284 | 150gr | Lapua ScenarL bullet and 34 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 Winchester StaBALL HD.
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% | 40,886 psi | 87% | 2697 fps | 99.1% |
| Accurate High Country | <<locked>> | 84% | 41,379 psi | 88% | 2815 fps | 96.1% |
| ADI AR 2209 | <<locked>> | 82% | 39,900 psi | 85% | 2713 fps | 96.6% |
| ADI AR 2217 | <<locked>> | 96% | 41,959 psi | 89% | 2782 fps | 96.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,525 psi | 90% | 2864 fps | 99.3% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 40,234 psi | 85% | 2717 fps | 96.7% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 40,234 psi | 85% | 2717 fps | 96.7% |
| Alliant Reloder-19 | <<locked>> | 84% | 42,598 psi | 90% | 2769 fps | 97.4% |
| Alliant Reloder-22 | <<locked>> | 86% | 40,654 psi | 86% | 2769 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 88% | 41,872 psi | 89% | 2779 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 41,307 psi | 88% | 2818 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 84% | 40,524 psi | 86% | 2828 fps | 99.8% |
| Bofors RP15 | <<locked>> | 88% | 40,350 psi | 86% | 2759 fps | 96.8% |
| Bofors RP30 | <<locked>> | 94% | 40,480 psi | 86% | 2799 fps | 96.3% |
| Bofors RP5 | <<locked>> | 86% | 40,654 psi | 86% | 2769 fps | 97.1% |
| Hodgdon H1000 | <<locked>> | 92% | 40,030 psi | 85% | 2743 fps | 96.2% |
| Hodgdon Retumbo | <<locked>> | 92% | 40,379 psi | 86% | 2854 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,028 psi | 79% | 1850 fps | 100% |
| IMR 7828 SSC | <<locked>> | 88% | 41,814 psi | 89% | 2802 fps | 96% |
| Lovex S071 | <<locked>> | 92% | 42,337 psi | 90% | 2726 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 38,130 psi | 81% | 2789 fps | 97.7% |
| Norma MRP | <<locked>> | 84% | 39,885 psi | 85% | 2782 fps | 98.2% |
| Ramshot Grand | <<locked>> | 88% | 41,698 psi | 88% | 2812 fps | 96.4% |
| Ramshot Magnum | <<locked>> | 90% | 39,972 psi | 85% | 2749 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,724 psi | 80% | 1893 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 39,726 psi | 84% | 2838 fps | 98.7% |
| Rottweil R 904 | <<locked>> | 82% | 41,278 psi | 88% | 2690 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 84% | 41,989 psi | 89% | 2756 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 41,626 psi | 88% | 2749 fps | 97.3% |
| Somchem S385 | <<locked>> | 84% | 42,467 psi | 90% | 2733 fps | 98.3% |
| Vihtavuori N165 | <<locked>> | 88% | 42,134 psi | 89% | 2720 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 84% | 41,060 psi | 87% | 2746 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 40,915 psi | 87% | 2887 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 41,727 psi | 89% | 2717 fps | 97.2% |
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% | 33,417 psi | 71% | 2530 fps | 97.3% |
| Accurate High Country | <<locked>> | 82% | 38,653 psi | 82% | 2753 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 37,449 psi | 79% | 2657 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 94% | 39,204 psi | 83% | 2720 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 92% | 32,938 psi | 70% | 2621 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 37,797 psi | 80% | 2661 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 37,797 psi | 80% | 2661 fps | 96% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,463 psi | 79% | 2654 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 82% | 35,636 psi | 76% | 2651 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,039 psi | 68% | 2559 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,007 psi | 59% | 2461 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 34,838 psi | 74% | 2694 fps | 99% |
| Bofors RP15 | <<locked>> | 84% | 35,360 psi | 75% | 2644 fps | 95.1% |
| Bofors RP30 | <<locked>> | 92% | 37,768 psi | 80% | 2736 fps | 95.4% |
| Bofors RP5 | <<locked>> | 82% | 35,636 psi | 76% | 2651 fps | 95.4% |
| Hodgdon H1000 | <<locked>> | 90% | 37,594 psi | 80% | 2687 fps | 95.3% |
| Hodgdon Retumbo | 60.9 gr | 88% | 35,346 psi | 75% | 2723 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,804 psi | 59% | 1657 fps | 100% |
| IMR 7828 SSC | <<locked>> | 86% | 39,088 psi | 83% | 2736 fps | 95% |
| Lovex S071 | <<locked>> | 80% | 28,776 psi | 61% | 2405 fps | 95.3% |
| Norma 217 | <<locked>> | 96% | 33,460 psi | 71% | 2667 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 34,737 psi | 74% | 2661 fps | 96.6% |
| Ramshot Grand | <<locked>> | 86% | 38,870 psi | 82% | 2746 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 86% | 34,606 psi | 73% | 2621 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,297 psi | 60% | 1693 fps | 100% |
| ReloadSwiss RS 76 | 63.7 gr | 86% | 32,242 psi | 68% | 2631 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 38,827 psi | 82% | 2638 fps | 95% |
| Rottweil R 905 | <<locked>> | 80% | 36,593 psi | 78% | 2635 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,274 psi | 77% | 2628 fps | 95.6% |
| Somchem S385 | <<locked>> | 80% | 37,362 psi | 79% | 2621 fps | 96.9% |
| Vihtavuori N165 | <<locked>> | 82% | 34,389 psi | 73% | 2546 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 35,926 psi | 76% | 2635 fps | 99.5% |
| Winchester StaBALL HD | 56.9 gr | 80% | 28,442 psi | 60% | 2572 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 36,347 psi | 77% | 2598 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 34 powders for .280 Riml. N.E. Ross loaded with the .284 | 150gr | Lapua ScenarL. Winchester StaBALL HD delivers the highest muzzle velocity at 2,887 fps; across all powders the maximum-charge window runs from 1,850 fps to 2,887 fps. ADI AR 2225 gives the best case fill at 100 %, and 34 of the 34 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 150.0 gr projectile in 0.284" calls for a 1:10.0 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. Hodgdon Retumbo, ReloadSwiss RS 76, Winchester StaBALL HD rank at the top here: for .280 Riml. N.E. Ross with the .284 | 150gr | Lapua ScenarL 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.