Load Specifications
Load data in caliber .280 Riml. N.E. Ross with .284 | 120gr | Hornady V-MAX bullet and 25 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-26.
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% | 40,538 psi | 86% | 2966 fps | 97.3% |
| Accurate 4350 | <<locked>> | 82% | 41,698 psi | 88% | 3018 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 40,263 psi | 85% | 3028 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 41,191 psi | 87% | 3058 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 96% | 40,828 psi | 87% | 3081 fps | 98.2% |
| Alliant Reloder-26 | <<locked>> | 88% | 39,900 psi | 85% | 3097 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 40,393 psi | 86% | 2966 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,550 psi | 78% | 2067 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 39,871 psi | 85% | 2959 fps | 98.6% |
| Lovex S070 | <<locked>> | 82% | 42,612 psi | 90% | 2989 fps | 97% |
| Lovex S071 | <<locked>> | 96% | 41,742 psi | 89% | 2992 fps | 97.6% |
| Norma MRP | <<locked>> | 90% | 42,554 psi | 90% | 3123 fps | 96.8% |
| Norma URP | <<locked>> | 82% | 41,307 psi | 88% | 3012 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 82% | 40,234 psi | 85% | 2995 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,101 psi | 79% | 2113 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 41,742 psi | 89% | 3041 fps | 98.7% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 40,321 psi | 86% | 3048 fps | 98.2% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 42,656 psi | 90% | 3163 fps | 97.1% |
| Shooters World SW4350 | <<locked>> | 82% | 42,612 psi | 90% | 2989 fps | 97% |
| Somchem S365 | <<locked>> | 84% | 40,335 psi | 86% | 3022 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 42,496 psi | 90% | 3009 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 82% | 42,221 psi | 90% | 3009 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 88% | 40,306 psi | 86% | 3022 fps | 99.1% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 42,003 psi | 89% | 2969 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 42,467 psi | 90% | 3228 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>> | 86% | 35,302 psi | 75% | 2838 fps | 95.5% |
| Accurate 4350 | <<locked>> | 80% | 38,972 psi | 83% | 2956 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,724 psi | 80% | 2966 fps | 98.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,717 psi | 59% | 2684 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,649 psi | 71% | 2877 fps | 95.4% |
| Alliant Reloder-26 | 63.5 gr | 82% | 32,097 psi | 68% | 2877 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,259 psi | 75% | 2844 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,224 psi | 58% | 1850 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 37,347 psi | 79% | 2900 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 39,987 psi | 85% | 2930 fps | 96.3% |
| Lovex S071 | <<locked>> | 90% | 34,287 psi | 73% | 2812 fps | 95.1% |
| Norma MRP | <<locked>> | 88% | 39,668 psi | 84% | 3051 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 38,667 psi | 82% | 2949 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 80% | 37,565 psi | 80% | 2930 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,775 psi | 59% | 1896 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,682 psi | 82% | 2969 fps | 97.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,623 psi | 80% | 2979 fps | 97.4% |
| ReloadSwiss RS 76 | 74.4 gr | 96% | 39,813 psi | 84% | 3087 fps | 96% |
| Shooters World SW4350 | <<locked>> | 80% | 39,987 psi | 85% | 2930 fps | 96.3% |
| Somchem S365 | <<locked>> | 80% | 35,157 psi | 75% | 2900 fps | 99.6% |
| Somchem S385 | <<locked>> | 86% | 39,871 psi | 85% | 2949 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 39,465 psi | 84% | 2946 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 80% | 30,763 psi | 65% | 2772 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,262 psi | 83% | 2910 fps | 99.7% |
| Winchester StaBALL HD | 61 gr | 82% | 26,324 psi | 56% | 2717 fps | 95.9% |
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 25 powders for .280 Riml. N.E. Ross loaded with the .284 | 120gr | Hornady V-MAX. Winchester StaBALL HD delivers the highest muzzle velocity at 3,228 fps; across all powders the maximum-charge window runs from 2,067 fps to 3,228 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 25 of the 25 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 120.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. 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-26 rank at the top here: for .280 Riml. N.E. Ross with the .284 | 120gr | Hornady V-MAX 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.