Load Specifications
Load data in caliber .280 Riml. N.E. Ross with .284 | 140gr | Alaska Bullet Works Kodiak SP SPBC 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 86% | 40,277 psi | 85% | 2776 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 84% | 42,061 psi | 89% | 2854 fps | 96.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,032 psi | 89% | 2940 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 84% | 41,959 psi | 89% | 2844 fps | 96.7% |
| Alliant Reloder-22 | <<locked>> | 86% | 40,030 psi | 85% | 2844 fps | 96.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 40,988 psi | 87% | 2854 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 40,611 psi | 86% | 2894 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 84% | 39,610 psi | 84% | 2897 fps | 99.5% |
| Bofors RP15 | <<locked>> | 90% | 42,380 psi | 90% | 2894 fps | 96.9% |
| Bofors RP30 | <<locked>> | 96% | 42,598 psi | 90% | 2933 fps | 96.4% |
| Bofors RP5 | <<locked>> | 86% | 40,030 psi | 85% | 2844 fps | 96.3% |
| Hodgdon H1000 | <<locked>> | 94% | 42,250 psi | 90% | 2881 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 42,598 psi | 90% | 2812 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 42,511 psi | 90% | 2995 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,970 psi | 78% | 1926 fps | 100% |
| Lovex S071 | <<locked>> | 92% | 41,655 psi | 88% | 2802 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 37,507 psi | 80% | 2858 fps | 96.8% |
| Norma MRP | <<locked>> | 86% | 42,076 psi | 89% | 2920 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 92% | 42,293 psi | 90% | 2887 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,826 psi | 80% | 1972 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 42,134 psi | 89% | 2979 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 84% | 41,336 psi | 88% | 2831 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,973 psi | 87% | 2828 fps | 96.6% |
| Somchem S385 | <<locked>> | 84% | 41,945 psi | 89% | 2812 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 88% | 41,452 psi | 88% | 2792 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 84% | 40,379 psi | 86% | 2825 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 90% | 39,900 psi | 85% | 2963 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 41,263 psi | 88% | 2795 fps | 96.5% |
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% | 32,793 psi | 70% | 2595 fps | 96.4% |
| ADI AR 2209 | <<locked>> | 82% | 39,392 psi | 84% | 2792 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 94% | 34,621 psi | 73% | 2746 fps | 96.2% |
| Alliant Reloder-19 | <<locked>> | 80% | 36,854 psi | 78% | 2726 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 84% | 37,449 psi | 79% | 2782 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,401 psi | 67% | 2625 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,356 psi | 62% | 2582 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 34,243 psi | 73% | 2762 fps | 98.3% |
| Bofors RP15 | <<locked>> | 86% | 37,173 psi | 79% | 2772 fps | 95.1% |
| Bofors RP30 | <<locked>> | 94% | 39,842 psi | 85% | 2871 fps | 95.4% |
| Bofors RP5 | <<locked>> | 84% | 37,449 psi | 79% | 2782 fps | 95.4% |
| Hodgdon H1000 | <<locked>> | 92% | 39,552 psi | 84% | 2815 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,813 psi | 84% | 2756 fps | 100% |
| Hodgdon Retumbo | 64.7 gr | 90% | 37,231 psi | 79% | 2858 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,702 psi | 59% | 1726 fps | 100% |
| Lovex S071 | <<locked>> | 82% | 30,081 psi | 64% | 2523 fps | 95.2% |
| Norma 217 | <<locked>> | 98% | 35,114 psi | 74% | 2792 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 34,171 psi | 72% | 2726 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 88% | 36,564 psi | 78% | 2753 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,166 psi | 60% | 1762 fps | 100% |
| ReloadSwiss RS 76 | 67.7 gr | 88% | 34,069 psi | 72% | 2762 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 82% | 38,667 psi | 82% | 2772 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 38,334 psi | 81% | 2766 fps | 95.7% |
| Somchem S385 | <<locked>> | 80% | 36,695 psi | 78% | 2694 fps | 96.1% |
| Vihtavuori N165 | <<locked>> | 84% | 36,187 psi | 77% | 2674 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 35,302 psi | 75% | 2710 fps | 99.1% |
| Winchester StaBALL HD | 59 gr | 80% | 27,847 psi | 59% | 2628 fps | 99.1% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,406 psi | 81% | 2733 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 43 powders for .280 Riml. N.E. Ross loaded with the .284 | 140gr | Alaska Bullet Works Kodiak SP SPBC. Hodgdon Retumbo delivers the highest muzzle velocity at 2,995 fps; across all powders the maximum-charge window runs from 1,926 fps to 2,995 fps. ADI AR 2225 gives the best case fill at 100 %, and 43 of the 43 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 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Hodgdon TrailBoss, IMR 8133 Enduron 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 | Alaska Bullet Works Kodiak SP SPBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Hodgdon H4831 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.