Load Specifications
Load data in caliber .280 Riml. N.E. Ross with .284 | 175gr | Alaska Bullet Works Kodiak PP SPBC bullet and 27 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% | 41,452 psi | 88% | 2523 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 82% | 40,843 psi | 87% | 2592 fps | 97.6% |
| ADI AR 2217 | <<locked>> | 92% | 42,206 psi | 90% | 2625 fps | 98.3% |
| ADI AR 2225 | <<locked>> | 94% | 40,857 psi | 87% | 2654 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 82% | 41,350 psi | 88% | 2598 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 82% | 39,929 psi | 85% | 2539 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 42,105 psi | 89% | 2644 fps | 100% |
| Bofors RP15 | <<locked>> | 84% | 41,002 psi | 87% | 2589 fps | 98.6% |
| Bofors RP30 | <<locked>> | 90% | 41,800 psi | 89% | 2641 fps | 98.4% |
| Bofors RP5 | <<locked>> | 82% | 41,350 psi | 88% | 2598 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 88% | 40,306 psi | 86% | 2585 fps | 98.3% |
| Hodgdon Retumbo | <<locked>> | 88% | 41,234 psi | 87% | 2700 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,449 psi | 79% | 1726 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 42,192 psi | 90% | 2631 fps | 98% |
| IMR 8133 Enduron | <<locked>> | 98% | 42,337 psi | 90% | 2677 fps | 98.4% |
| Lovex S071 | <<locked>> | 86% | 40,480 psi | 86% | 2507 fps | 99.8% |
| Norma 217 | <<locked>> | 96% | 39,914 psi | 85% | 2648 fps | 99.5% |
| Ramshot Grand | <<locked>> | 84% | 42,148 psi | 89% | 2644 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 86% | 40,683 psi | 86% | 2585 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,464 psi | 82% | 1772 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 40,582 psi | 86% | 2684 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 42,612 psi | 90% | 2697 fps | 97.3% |
| Vihtavuori N165 | <<locked>> | 84% | 42,438 psi | 90% | 2546 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 86% | 41,162 psi | 87% | 2602 fps | 97.5% |
| Vihtavuori N568 | <<locked>> | 90% | 41,060 psi | 87% | 2648 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 84% | 40,103 psi | 85% | 2651 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 41,916 psi | 89% | 2543 fps | 98.8% |
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% | 38,769 psi | 82% | 2470 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 38,189 psi | 81% | 2533 fps | 96.8% |
| ADI AR 2217 | <<locked>> | 86% | 34,664 psi | 74% | 2451 fps | 95.8% |
| ADI AR 2225 | 57.3 gr | 82% | 27,659 psi | 59% | 2310 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 38,653 psi | 82% | 2543 fps | 98.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 37,420 psi | 79% | 2490 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 32,343 psi | 69% | 2428 fps | 99.2% |
| Bofors RP15 | <<locked>> | 80% | 36,013 psi | 76% | 2480 fps | 97.3% |
| Bofors RP30 | <<locked>> | 82% | 31,894 psi | 68% | 2415 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 38,653 psi | 82% | 2543 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 82% | 32,953 psi | 70% | 2411 fps | 95.8% |
| Hodgdon Retumbo | 55.9 gr | 80% | 31,575 psi | 67% | 2454 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,065 psi | 60% | 1542 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 36,825 psi | 78% | 2513 fps | 96.4% |
| IMR 8133 Enduron | <<locked>> | 90% | 32,576 psi | 69% | 2451 fps | 95.1% |
| Lovex S071 | <<locked>> | 80% | 33,504 psi | 71% | 2359 fps | 98.8% |
| Norma 217 | <<locked>> | 86% | 28,500 psi | 60% | 2359 fps | 95.6% |
| Ramshot Grand | <<locked>> | 80% | 36,477 psi | 77% | 2520 fps | 96.8% |
| Ramshot Magnum | <<locked>> | 80% | 32,677 psi | 69% | 2408 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,834 psi | 61% | 1581 fps | 100% |
| ReloadSwiss RS 76 | 59.8 gr | 80% | 30,487 psi | 65% | 2425 fps | 97.2% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 36,753 psi | 78% | 2569 fps | 95.3% |
| Vihtavuori N165 | <<locked>> | 80% | 37,144 psi | 79% | 2438 fps | 98.2% |
| Vihtavuori N565 | <<locked>> | 82% | 35,868 psi | 76% | 2484 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 88% | 38,218 psi | 81% | 2585 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 34,214 psi | 73% | 2536 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 39,175 psi | 83% | 2487 fps | 98.2% |
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 35 powders for .280 Riml. N.E. Ross loaded with the .284 | 175gr | Alaska Bullet Works Kodiak PP SPBC. Hodgdon Retumbo delivers the highest muzzle velocity at 2,700 fps; across all powders the maximum-charge window runs from 1,726 fps to 2,700 fps. Accurate 8700 gives the best case fill at 100 %, and 35 of the 35 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 175.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, 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 | 175gr | Alaska Bullet Works Kodiak PP SPBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 8700, ADI AR 2218, Alliant Reloder-33 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.