Load Specifications
Load data in caliber .280 Riml. N.E. Ross with .284 | 130gr | NorthFork Bonded Core bullet and 24 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, ReloadSwiss RS 76 and Alliant Reloder-25.
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% | 40,190 psi | 85% | 2861 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,349 psi | 83% | 2953 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 82% | 42,453 psi | 90% | 2976 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,264 psi | 90% | 2943 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 90% | 40,857 psi | 87% | 2946 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 40,538 psi | 86% | 2976 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 86% | 39,653 psi | 84% | 2992 fps | 99.1% |
| Bofors RP15 | <<locked>> | 92% | 42,279 psi | 90% | 2982 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 39,943 psi | 85% | 2854 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 96% | 42,395 psi | 90% | 3074 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,593 psi | 78% | 1988 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 42,134 psi | 89% | 2910 fps | 99.4% |
| Lovex S071 | <<locked>> | 94% | 41,379 psi | 88% | 2887 fps | 98.2% |
| Norma MRP | <<locked>> | 88% | 42,090 psi | 89% | 3012 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 82% | 42,351 psi | 90% | 2943 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 94% | 42,395 psi | 90% | 2972 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,405 psi | 79% | 2037 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 42,467 psi | 90% | 2999 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 42,163 psi | 89% | 3061 fps | 97.9% |
| Somchem S365 | <<locked>> | 82% | 40,147 psi | 85% | 2910 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 42,003 psi | 89% | 2900 fps | 96.9% |
| Vihtavuori N165 | <<locked>> | 90% | 41,495 psi | 88% | 2881 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 86% | 40,234 psi | 85% | 2917 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 94% | 42,467 psi | 90% | 3120 fps | 100% |
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% | 32,692 psi | 69% | 2677 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 98% | 36,767 psi | 78% | 2884 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,740 psi | 84% | 2913 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,624 psi | 84% | 2877 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,472 psi | 63% | 2654 fps | 97.8% |
| Alliant Reloder-25 | 61 gr | 86% | 31,285 psi | 66% | 2720 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,763 psi | 67% | 2779 fps | 96.5% |
| Bofors RP15 | <<locked>> | 90% | 39,595 psi | 84% | 2920 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,318 psi | 79% | 2795 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,769 psi | 84% | 3005 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,369 psi | 58% | 1778 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 39,450 psi | 84% | 2851 fps | 99% |
| Lovex S071 | <<locked>> | 86% | 31,908 psi | 68% | 2654 fps | 95.1% |
| Norma MRP | <<locked>> | 84% | 36,709 psi | 78% | 2881 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 39,697 psi | 84% | 2884 fps | 97.7% |
| Ramshot Magnum | <<locked>> | 92% | 39,421 psi | 84% | 2904 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,963 psi | 59% | 1824 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,610 psi | 84% | 2933 fps | 98.7% |
| ReloadSwiss RS 76 | 70.7 gr | 92% | 36,695 psi | 78% | 2913 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 37,463 psi | 79% | 2851 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,927 psi | 78% | 2782 fps | 95.2% |
| Vihtavuori N165 | <<locked>> | 88% | 38,856 psi | 82% | 2822 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 32,851 psi | 70% | 2736 fps | 97.8% |
| Winchester StaBALL HD | 59 gr | 80% | 26,121 psi | 55% | 2631 fps | 97.1% |
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 24 powders for .280 Riml. N.E. Ross loaded with the .284 | 130gr | NorthFork Bonded Core. Winchester StaBALL HD delivers the highest muzzle velocity at 3,120 fps; across all powders the maximum-charge window runs from 1,988 fps to 3,120 fps. ADI AR 2225 gives the best case fill at 100 %, and 24 of the 24 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 130.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, 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. Winchester StaBALL HD, ReloadSwiss RS 76, Alliant Reloder-25 rank at the top here: for .280 Riml. N.E. Ross with the .284 | 130gr | NorthFork Bonded Core 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.