Load Specifications
Load data in caliber .280 Riml. N.E. Ross with .284 | 140gr | Nosler Expansion Tip bullet and 32 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.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 90% | 42,134 psi | 89% | 2812 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 86% | 41,800 psi | 89% | 2841 fps | 96.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,522 psi | 82% | 2848 fps | 97.5% |
| Alliant Reloder-16 | <<locked>> | 82% | 42,090 psi | 89% | 2871 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,800 psi | 89% | 2838 fps | 96.4% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,351 psi | 90% | 2894 fps | 96.7% |
| Alliant Reloder-23 | <<locked>> | 90% | 40,379 psi | 86% | 2844 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 42,583 psi | 90% | 2933 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 88% | 41,858 psi | 89% | 2949 fps | 99.7% |
| Bofors RP15 | <<locked>> | 92% | 41,771 psi | 89% | 2881 fps | 96.4% |
| Bofors RP5 | <<locked>> | 90% | 42,351 psi | 90% | 2894 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 42,148 psi | 89% | 2802 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 41,814 psi | 89% | 2972 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,680 psi | 78% | 1906 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 42,424 psi | 90% | 2792 fps | 97.6% |
| IMR 4831 | <<locked>> | 82% | 41,611 psi | 88% | 2802 fps | 99.6% |
| Lovex S071 | <<locked>> | 94% | 40,437 psi | 86% | 2779 fps | 98.5% |
| Norma 204 | <<locked>> | 82% | 42,395 psi | 90% | 2831 fps | 96.3% |
| Norma MRP | <<locked>> | 88% | 41,437 psi | 88% | 2907 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 82% | 41,945 psi | 89% | 2841 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 94% | 41,684 psi | 88% | 2867 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,289 psi | 79% | 1949 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 42,018 psi | 89% | 2897 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 41,408 psi | 88% | 2956 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 86% | 40,799 psi | 87% | 2818 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 40,437 psi | 86% | 2812 fps | 96.2% |
| Somchem S365 | <<locked>> | 84% | 42,453 psi | 90% | 2858 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 41,379 psi | 88% | 2799 fps | 97.3% |
| Vihtavuori N165 | <<locked>> | 90% | 40,930 psi | 87% | 2779 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 88% | 42,047 psi | 89% | 2861 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 94% | 41,684 psi | 88% | 3005 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,814 psi | 87% | 2782 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>> | 82% | 31,749 psi | 67% | 2572 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 84% | 39,204 psi | 83% | 2782 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 96% | 33,866 psi | 72% | 2720 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,204 psi | 83% | 2808 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,015 psi | 83% | 2776 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 88% | 39,479 psi | 84% | 2831 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,761 psi | 61% | 2552 fps | 98.1% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,574 psi | 65% | 2618 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,038 psi | 66% | 2674 fps | 96.9% |
| Bofors RP15 | <<locked>> | 90% | 38,957 psi | 83% | 2815 fps | 95.5% |
| Bofors RP5 | <<locked>> | 88% | 39,479 psi | 84% | 2831 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,854 psi | 78% | 2690 fps | 99.8% |
| Hodgdon Retumbo | 63.3 gr | 92% | 36,492 psi | 77% | 2831 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,224 psi | 58% | 1699 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,856 psi | 85% | 2736 fps | 96.9% |
| IMR 4831 | <<locked>> | 80% | 38,812 psi | 82% | 2743 fps | 99.3% |
| Lovex S071 | <<locked>> | 86% | 31,111 psi | 66% | 2552 fps | 95.4% |
| Norma 204 | <<locked>> | 80% | 39,349 psi | 83% | 2762 fps | 95.4% |
| Norma MRP | <<locked>> | 82% | 33,533 psi | 71% | 2710 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 38,986 psi | 83% | 2776 fps | 98% |
| Ramshot Magnum | <<locked>> | 90% | 35,897 psi | 76% | 2733 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,833 psi | 59% | 1742 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,030 psi | 83% | 2828 fps | 99% |
| ReloadSwiss RS 76 | 67.8 gr | 92% | 35,897 psi | 76% | 2815 fps | 96.3% |
| Rottweil R 905 | <<locked>> | 84% | 38,203 psi | 81% | 2759 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 37,855 psi | 80% | 2753 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 36,883 psi | 78% | 2746 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,056 psi | 76% | 2677 fps | 95.6% |
| Vihtavuori N165 | <<locked>> | 86% | 35,766 psi | 76% | 2661 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 80% | 32,039 psi | 68% | 2631 fps | 98.1% |
| Winchester StaBALL HD | 56.5 gr | 80% | 25,237 psi | 54% | 2526 fps | 97.4% |
| Winchester Supreme 780 | <<locked>> | 86% | 37,985 psi | 81% | 2720 fps | 95.1% |
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 50 powders for .280 Riml. N.E. Ross loaded with the .284 | 140gr | Nosler Expansion Tip. Winchester StaBALL HD delivers the highest muzzle velocity at 3,005 fps; across all powders the maximum-charge window runs from 1,906 fps to 3,005 fps. ADI AR 2225 gives the best case fill at 100 %, and 50 of the 50 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 72–90 %, leaving at least 10 % headroom. The 140.0 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, 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 | Nosler Expansion Tip they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, ADI AR 2217 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.