Load Specifications
Load data in caliber .280 Riml. N.E. Ross with .284 | 165gr | Geco SOFTPOINT bullet and 28 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>> | 82% | 40,625 psi | 86% | 2582 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 82% | 41,785 psi | 89% | 2700 fps | 96.2% |
| ADI AR 2213 | <<locked>> | 82% | 40,001 psi | 85% | 2648 fps | 96.8% |
| ADI AR 2217 | <<locked>> | 92% | 41,394 psi | 88% | 2680 fps | 97.6% |
| ADI AR 2225 | <<locked>> | 94% | 40,074 psi | 85% | 2710 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 82% | 40,451 psi | 86% | 2654 fps | 98.2% |
| Alliant Reloder-23 | <<locked>> | 84% | 41,814 psi | 89% | 2654 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 41,365 psi | 88% | 2707 fps | 100% |
| Bofors RP15 | <<locked>> | 84% | 40,321 psi | 86% | 2651 fps | 98% |
| Bofors RP30 | <<locked>> | 90% | 40,930 psi | 87% | 2697 fps | 97.7% |
| Bofors RP5 | <<locked>> | 82% | 40,451 psi | 86% | 2654 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 90% | 42,525 psi | 90% | 2703 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 82% | 41,916 psi | 89% | 2635 fps | 96.7% |
| Hodgdon Retumbo | <<locked>> | 88% | 40,277 psi | 85% | 2753 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,434 psi | 79% | 1788 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 41,423 psi | 88% | 2690 fps | 97.3% |
| IMR 8133 Enduron | <<locked>> | 98% | 41,408 psi | 88% | 2733 fps | 97.8% |
| Lovex S071 | <<locked>> | 88% | 42,366 psi | 90% | 2618 fps | 99.8% |
| Norma 217 | <<locked>> | 98% | 41,800 psi | 89% | 2759 fps | 99.5% |
| Ramshot Grand | <<locked>> | 84% | 41,234 psi | 87% | 2700 fps | 97.7% |
| Ramshot Magnum | <<locked>> | 86% | 39,798 psi | 84% | 2641 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,406 psi | 81% | 1834 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 39,755 psi | 84% | 2736 fps | 99.6% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 41,655 psi | 88% | 2749 fps | 96.5% |
| Vihtavuori N165 | <<locked>> | 84% | 41,524 psi | 88% | 2602 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 86% | 40,205 psi | 85% | 2654 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 86% | 42,134 psi | 89% | 2772 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 41,046 psi | 87% | 2598 fps | 98.2% |
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% | 37,985 psi | 81% | 2530 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 80% | 38,943 psi | 83% | 2641 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 80% | 37,463 psi | 79% | 2589 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 88% | 36,347 psi | 77% | 2562 fps | 95.9% |
| ADI AR 2225 | 60.4 gr | 84% | 28,979 psi | 61% | 2411 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,855 psi | 80% | 2598 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,564 psi | 78% | 2549 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,705 psi | 67% | 2480 fps | 98.6% |
| Bofors RP15 | <<locked>> | 80% | 35,331 psi | 75% | 2536 fps | 96.5% |
| Bofors RP30 | <<locked>> | 84% | 33,286 psi | 71% | 2520 fps | 95% |
| Bofors RP5 | <<locked>> | 80% | 37,855 psi | 80% | 2598 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 84% | 34,606 psi | 73% | 2520 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,233 psi | 83% | 2579 fps | 95.9% |
| Hodgdon Retumbo | 57.5 gr | 80% | 30,937 psi | 66% | 2500 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,123 psi | 60% | 1598 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 36,114 psi | 77% | 2569 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 92% | 33,910 psi | 72% | 2556 fps | 95% |
| Lovex S071 | <<locked>> | 80% | 32,808 psi | 70% | 2411 fps | 98.2% |
| Norma 217 | <<locked>> | 88% | 29,747 psi | 63% | 2461 fps | 95.6% |
| Ramshot Grand | <<locked>> | 80% | 35,810 psi | 76% | 2572 fps | 95.9% |
| Ramshot Magnum | <<locked>> | 80% | 32,010 psi | 68% | 2457 fps | 96.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,674 psi | 61% | 1634 fps | 100% |
| ReloadSwiss RS 76 | 61.5 gr | 80% | 29,878 psi | 63% | 2470 fps | 96.2% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 38,769 psi | 82% | 2684 fps | 95.5% |
| Vihtavuori N165 | <<locked>> | 80% | 36,477 psi | 77% | 2497 fps | 97.6% |
| Vihtavuori N565 | <<locked>> | 84% | 37,681 psi | 80% | 2598 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 33,170 psi | 70% | 2592 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,392 psi | 81% | 2546 fps | 97.6% |
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 | 165gr | Geco SOFTPOINT. Winchester StaBALL HD delivers the highest muzzle velocity at 2,772 fps; across all powders the maximum-charge window runs from 1,788 fps to 2,772 fps. Hodgdon TrailBoss 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 79–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.284" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14 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 | 165gr | Geco SOFTPOINT 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.