Load Specifications
Load data in caliber .280 Riml. N.E. Ross with .284 | 140gr | NorthFork Bonded Core 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, Winchester StaBALL HD 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.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 42,192 psi | 90% | 2812 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 84% | 41,220 psi | 87% | 2828 fps | 96.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,075 psi | 87% | 2913 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 84% | 41,278 psi | 88% | 2828 fps | 96.4% |
| Alliant Reloder-22 | <<locked>> | 88% | 41,887 psi | 89% | 2884 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 40,089 psi | 85% | 2835 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 42,395 psi | 90% | 2930 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 86% | 41,742 psi | 89% | 2943 fps | 99.7% |
| Bofors RP15 | <<locked>> | 90% | 41,524 psi | 88% | 2874 fps | 96.5% |
| Bofors RP5 | <<locked>> | 88% | 41,887 psi | 89% | 2884 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 41,785 psi | 89% | 2792 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 41,408 psi | 88% | 2963 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,767 psi | 78% | 1916 fps | 100% |
| Lovex S071 | <<locked>> | 92% | 40,770 psi | 86% | 2782 fps | 98.6% |
| Norma 217ᴾ | <<locked>> | 100% | 36,463 psi | 77% | 2825 fps | 96.3% |
| Norma MRP | <<locked>> | 86% | 41,205 psi | 87% | 2900 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 92% | 41,176 psi | 87% | 2858 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,637 psi | 80% | 1962 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 41,118 psi | 87% | 2953 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 84% | 40,422 psi | 86% | 2808 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 40,059 psi | 85% | 2802 fps | 96.2% |
| Somchem S365 | <<locked>> | 82% | 42,018 psi | 89% | 2848 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 41,104 psi | 87% | 2792 fps | 97.4% |
| Vihtavuori N165 | <<locked>> | 88% | 40,625 psi | 86% | 2772 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 86% | 42,177 psi | 89% | 2861 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 92% | 41,901 psi | 89% | 3002 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,263 psi | 85% | 2769 fps | 96.1% |
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% | 31,966 psi | 68% | 2572 fps | 96% |
| ADI AR 2209 | <<locked>> | 82% | 38,580 psi | 82% | 2766 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 94% | 33,765 psi | 72% | 2717 fps | 95.5% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,464 psi | 82% | 2762 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 86% | 39,189 psi | 83% | 2822 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,719 psi | 65% | 2605 fps | 98.9% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,618 psi | 65% | 2621 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,417 psi | 71% | 2740 fps | 98% |
| Bofors RP15 | <<locked>> | 88% | 38,856 psi | 82% | 2812 fps | 95.6% |
| Bofors RP5 | <<locked>> | 86% | 39,189 psi | 83% | 2822 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,015 psi | 83% | 2736 fps | 100% |
| Hodgdon Retumbo | 63.5 gr | 90% | 36,361 psi | 77% | 2828 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,557 psi | 58% | 1713 fps | 100% |
| Lovex S071 | <<locked>> | 84% | 31,357 psi | 67% | 2556 fps | 95.7% |
| Norma 217 | <<locked>> | 98% | 34,113 psi | 72% | 2762 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 33,359 psi | 71% | 2703 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 88% | 35,723 psi | 76% | 2730 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,210 psi | 60% | 1755 fps | 100% |
| ReloadSwiss RS 76 | 66.5 gr | 88% | 33,315 psi | 71% | 2736 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 82% | 37,782 psi | 80% | 2746 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 37,449 psi | 79% | 2740 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 39,218 psi | 83% | 2789 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,027 psi | 76% | 2674 fps | 95.7% |
| Vihtavuori N165 | <<locked>> | 84% | 35,592 psi | 76% | 2657 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 80% | 34,360 psi | 73% | 2684 fps | 98.8% |
| Winchester StaBALL HD | 58 gr | 80% | 27,311 psi | 58% | 2605 fps | 98.8% |
| Winchester Supreme 780 | <<locked>> | 84% | 37,637 psi | 80% | 2710 fps | 95.2% |
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 44 powders for .280 Riml. N.E. Ross loaded with the .284 | 140gr | NorthFork Bonded Core. Winchester StaBALL HD delivers the highest muzzle velocity at 3,002 fps; across all powders the maximum-charge window runs from 1,916 fps to 3,002 fps. ADI AR 2225 gives the best case fill at 100 %, and 44 of the 44 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 77–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:11.0 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. Hodgdon Retumbo, Winchester StaBALL HD, ReloadSwiss RS 76 rank at the top here: for .280 Riml. N.E. Ross with the .284 | 140gr | NorthFork Bonded Core they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2217, 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.