Load Specifications
Load data in caliber .280 Riml. N.E. Ross with .284 | 145gr | Barnes LRX BT bullet and 92 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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 40,176 psi | 85% | 2730 fps | 98.7% |
| Accurate 3100 | <<locked>> | 88% | 39,972 psi | 85% | 2723 fps | 98.6% |
| Accurate 3100 | <<locked>> | 88% | 40,176 psi | 85% | 2730 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 84% | 39,784 psi | 84% | 2753 fps | 96.1% |
| ADI AR 2209 | <<locked>> | 86% | 42,467 psi | 90% | 2812 fps | 96.9% |
| ADI AR 2209 | <<locked>> | 84% | 39,784 psi | 84% | 2753 fps | 96.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,363 psi | 84% | 2831 fps | 98.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,204 psi | 83% | 2825 fps | 98.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,363 psi | 84% | 2831 fps | 98.1% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 40,248 psi | 85% | 2759 fps | 96.2% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 40,045 psi | 85% | 2753 fps | 96.2% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 40,248 psi | 85% | 2759 fps | 96.2% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,453 psi | 90% | 2808 fps | 96.9% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,279 psi | 90% | 2805 fps | 96.9% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,453 psi | 90% | 2808 fps | 96.9% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,263 psi | 85% | 2805 fps | 96.5% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,045 psi | 85% | 2799 fps | 96.4% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,263 psi | 85% | 2805 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 41,162 psi | 87% | 2812 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 40,973 psi | 87% | 2808 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 41,162 psi | 87% | 2812 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 40,770 psi | 86% | 2848 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 94% | 40,582 psi | 86% | 2844 fps | 99.4% |
| Alliant Reloder-25 | <<locked>> | 94% | 40,770 psi | 86% | 2848 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 86% | 39,798 psi | 84% | 2858 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 88% | 42,641 psi | 90% | 2917 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 86% | 39,798 psi | 84% | 2858 fps | 99.6% |
| Bofors RP15 | <<locked>> | 92% | 42,583 psi | 90% | 2851 fps | 97% |
| Bofors RP15 | <<locked>> | 92% | 42,409 psi | 90% | 2848 fps | 96.9% |
| Bofors RP15 | <<locked>> | 92% | 42,583 psi | 90% | 2851 fps | 97% |
| Bofors RP30 | <<locked>> | 98% | 42,438 psi | 90% | 2884 fps | 96.4% |
| Bofors RP30 | <<locked>> | 98% | 42,250 psi | 90% | 2877 fps | 96.3% |
| Bofors RP30 | <<locked>> | 98% | 42,438 psi | 90% | 2884 fps | 96.4% |
| Bofors RP5 | <<locked>> | 88% | 40,263 psi | 85% | 2805 fps | 96.5% |
| Bofors RP5 | <<locked>> | 88% | 40,045 psi | 85% | 2799 fps | 96.4% |
| Bofors RP5 | <<locked>> | 88% | 40,263 psi | 85% | 2805 fps | 96.5% |
| Hodgdon H1000 | <<locked>> | 96% | 42,511 psi | 90% | 2835 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 40,234 psi | 85% | 2717 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 39,987 psi | 85% | 2713 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 40,234 psi | 85% | 2717 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 42,496 psi | 90% | 2946 fps | 98% |
| Hodgdon Retumbo | <<locked>> | 96% | 42,308 psi | 90% | 2943 fps | 97.9% |
| Hodgdon Retumbo | <<locked>> | 96% | 42,496 psi | 90% | 2946 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,579 psi | 78% | 1867 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,709 psi | 78% | 1870 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,579 psi | 78% | 1867 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 42,264 psi | 90% | 2772 fps | 99.8% |
| IMR 4831 | <<locked>> | 82% | 42,264 psi | 90% | 2772 fps | 99.8% |
| IMR 4831 | <<locked>> | 82% | 42,264 psi | 90% | 2772 fps | 99.8% |
| Lovex S071 | <<locked>> | 94% | 41,437 psi | 88% | 2753 fps | 98.9% |
| Lovex S071 | <<locked>> | 94% | 41,234 psi | 87% | 2749 fps | 98.8% |
| Lovex S071 | <<locked>> | 94% | 41,437 psi | 88% | 2753 fps | 98.9% |
| Norma MRP | <<locked>> | 88% | 42,496 psi | 90% | 2884 fps | 98.4% |
| Norma MRP | <<locked>> | 88% | 42,279 psi | 90% | 2881 fps | 98.3% |
| Norma MRP | <<locked>> | 88% | 42,496 psi | 90% | 2884 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 82% | 42,627 psi | 90% | 2812 fps | 99% |
| Ramshot Hunter | <<locked>> | 82% | 42,438 psi | 90% | 2805 fps | 99% |
| Ramshot Hunter | <<locked>> | 82% | 42,627 psi | 90% | 2812 fps | 99% |
| Ramshot Magnum | <<locked>> | 94% | 42,656 psi | 90% | 2848 fps | 98% |
| Ramshot Magnum | <<locked>> | 94% | 42,482 psi | 90% | 2841 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 94% | 42,656 psi | 90% | 2848 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,434 psi | 79% | 1916 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,347 psi | 79% | 1913 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,434 psi | 79% | 1916 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 42,554 psi | 90% | 2861 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 42,206 psi | 90% | 2933 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 42,061 psi | 89% | 2930 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 42,206 psi | 90% | 2933 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 86% | 41,684 psi | 88% | 2792 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 86% | 41,495 psi | 88% | 2789 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 86% | 41,684 psi | 88% | 2792 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 41,321 psi | 88% | 2789 fps | 96.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 41,133 psi | 87% | 2782 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 41,321 psi | 88% | 2789 fps | 96.8% |
| Somchem S365 | <<locked>> | 82% | 40,379 psi | 86% | 2769 fps | 100% |
| Somchem S365 | <<locked>> | 82% | 40,132 psi | 85% | 2766 fps | 100% |
| Somchem S365 | <<locked>> | 82% | 40,379 psi | 86% | 2769 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 42,076 psi | 89% | 2769 fps | 97.8% |
| Somchem S385 | <<locked>> | 86% | 42,105 psi | 89% | 2769 fps | 97.8% |
| Somchem S385 | <<locked>> | 86% | 42,076 psi | 89% | 2769 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 90% | 41,684 psi | 88% | 2753 fps | 97.4% |
| Vihtavuori N165 | <<locked>> | 90% | 41,481 psi | 88% | 2746 fps | 97.3% |
| Vihtavuori N165 | <<locked>> | 90% | 41,684 psi | 88% | 2753 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 86% | 40,306 psi | 86% | 2779 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 86% | 40,074 psi | 85% | 2776 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 86% | 40,306 psi | 86% | 2779 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 92% | 39,682 psi | 84% | 2917 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 39,421 psi | 84% | 2913 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 39,682 psi | 84% | 2917 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,568 psi | 88% | 2756 fps | 96.7% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,350 psi | 88% | 2749 fps | 96.6% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,568 psi | 88% | 2756 fps | 96.7% |
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% | 30,211 psi | 64% | 2487 fps | 95.4% |
| Accurate 3100 | <<locked>> | 80% | 30,197 psi | 64% | 2487 fps | 95.4% |
| Accurate 3100 | <<locked>> | 80% | 30,211 psi | 64% | 2487 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 82% | 37,289 psi | 79% | 2694 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 82% | 37,101 psi | 79% | 2687 fps | 95% |
| ADI AR 2209 | <<locked>> | 82% | 37,289 psi | 79% | 2694 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 94% | 32,329 psi | 69% | 2638 fps | 95% |
| ADI AR 2225 | <<locked>> | 96% | 34,258 psi | 73% | 2694 fps | 96% |
| ADI AR 2225 | <<locked>> | 94% | 32,329 psi | 69% | 2638 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 37,521 psi | 80% | 2694 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 37,347 psi | 79% | 2690 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 37,521 psi | 80% | 2694 fps | 95.3% |
| Alliant Reloder-19 | <<locked>> | 82% | 37,159 psi | 79% | 2687 fps | 95.2% |
| Alliant Reloder-19 | <<locked>> | 82% | 36,956 psi | 78% | 2684 fps | 95.1% |
| Alliant Reloder-19 | <<locked>> | 82% | 37,159 psi | 79% | 2687 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,492 psi | 80% | 2740 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,507 psi | 80% | 2740 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,492 psi | 80% | 2740 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,370 psi | 62% | 2530 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,211 psi | 62% | 2523 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,370 psi | 62% | 2530 fps | 98.6% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,196 psi | 62% | 2536 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,196 psi | 62% | 2536 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,196 psi | 62% | 2536 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,633 psi | 67% | 2651 fps | 97.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,473 psi | 67% | 2648 fps | 97.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,633 psi | 67% | 2651 fps | 97.6% |
| Bofors RP15 | <<locked>> | 88% | 37,188 psi | 79% | 2730 fps | 95.2% |
| Bofors RP15 | <<locked>> | 88% | 37,014 psi | 79% | 2726 fps | 95.1% |
| Bofors RP15 | <<locked>> | 88% | 37,188 psi | 79% | 2730 fps | 95.2% |
| Bofors RP30 | <<locked>> | 96% | 39,682 psi | 84% | 2822 fps | 95.5% |
| Bofors RP30 | <<locked>> | 96% | 39,537 psi | 84% | 2818 fps | 95.4% |
| Bofors RP30 | <<locked>> | 96% | 39,682 psi | 84% | 2822 fps | 95.5% |
| Bofors RP5 | <<locked>> | 86% | 37,492 psi | 80% | 2740 fps | 95.5% |
| Bofors RP5 | <<locked>> | 86% | 37,507 psi | 80% | 2740 fps | 95.5% |
| Bofors RP5 | <<locked>> | 86% | 37,492 psi | 80% | 2740 fps | 95.5% |
| Hodgdon H1000 | <<locked>> | 94% | 39,798 psi | 84% | 2772 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,579 psi | 80% | 2661 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,376 psi | 79% | 2657 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,579 psi | 80% | 2661 fps | 99.9% |
| Hodgdon Retumbo | 62.7 gr | 92% | 37,202 psi | 79% | 2812 fps | 96% |
| Hodgdon Retumbo | 61.4 gr | 92% | 37,028 psi | 79% | 2805 fps | 95.9% |
| Hodgdon Retumbo | 62.7 gr | 92% | 37,202 psi | 79% | 2812 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,441 psi | 58% | 1673 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,340 psi | 58% | 1670 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,441 psi | 58% | 1673 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 39,581 psi | 84% | 2717 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 39,349 psi | 83% | 2710 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 39,581 psi | 84% | 2717 fps | 99.5% |
| Lovex S071 | <<locked>> | 84% | 29,733 psi | 63% | 2474 fps | 95.2% |
| Lovex S071 | <<locked>> | 84% | 29,559 psi | 63% | 2470 fps | 95.1% |
| Lovex S071 | <<locked>> | 84% | 29,733 psi | 63% | 2474 fps | 95.2% |
| Norma MRP | <<locked>> | 82% | 34,127 psi | 72% | 2687 fps | 95.8% |
| Norma MRP | <<locked>> | 82% | 33,968 psi | 72% | 2680 fps | 95.7% |
| Norma MRP | <<locked>> | 82% | 34,127 psi | 72% | 2687 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 39,769 psi | 84% | 2749 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 80% | 39,581 psi | 84% | 2746 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 80% | 39,769 psi | 84% | 2749 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 88% | 34,127 psi | 72% | 2648 fps | 95% |
| Ramshot Magnum | <<locked>> | 90% | 36,506 psi | 77% | 2707 fps | 96% |
| Ramshot Magnum | <<locked>> | 88% | 34,127 psi | 72% | 2648 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,862 psi | 59% | 1709 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,963 psi | 59% | 1713 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,862 psi | 59% | 1709 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,682 psi | 84% | 2799 fps | 99.3% |
| ReloadSwiss RS 76 | 65.7 gr | 90% | 34,084 psi | 72% | 2720 fps | 95.8% |
| ReloadSwiss RS 76 | 65.7 gr | 90% | 33,953 psi | 72% | 2717 fps | 95.7% |
| ReloadSwiss RS 76 | 65.7 gr | 90% | 34,084 psi | 72% | 2720 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 82% | 36,347 psi | 77% | 2671 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 82% | 36,129 psi | 77% | 2664 fps | 95% |
| Rottweil R 905 | <<locked>> | 82% | 36,347 psi | 77% | 2671 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 36,013 psi | 76% | 2664 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,493 psi | 82% | 2723 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 36,013 psi | 76% | 2664 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 37,507 psi | 80% | 2713 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 37,492 psi | 80% | 2713 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 37,507 psi | 80% | 2713 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 34,345 psi | 73% | 2592 fps | 95.3% |
| Somchem S385 | <<locked>> | 80% | 34,330 psi | 73% | 2592 fps | 95.3% |
| Somchem S385 | <<locked>> | 80% | 34,345 psi | 73% | 2592 fps | 95.3% |
| Vihtavuori N165 | <<locked>> | 86% | 36,405 psi | 77% | 2635 fps | 95.7% |
| Vihtavuori N165 | <<locked>> | 86% | 36,230 psi | 77% | 2631 fps | 95.6% |
| Vihtavuori N165 | <<locked>> | 86% | 36,405 psi | 77% | 2635 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 32,779 psi | 70% | 2605 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 80% | 32,547 psi | 69% | 2598 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 32,779 psi | 70% | 2605 fps | 98.6% |
| Winchester StaBALL HD | 56 gr | 80% | 25,817 psi | 55% | 2513 fps | 98.2% |
| Winchester StaBALL HD | 56 gr | 80% | 25,672 psi | 54% | 2510 fps | 98.2% |
| Winchester StaBALL HD | 56 gr | 80% | 25,817 psi | 55% | 2513 fps | 98.2% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,696 psi | 82% | 2694 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,696 psi | 82% | 2694 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,696 psi | 82% | 2694 fps | 95.8% |
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 92 powders for .280 Riml. N.E. Ross loaded with the .284 | 145gr | Barnes LRX BT. Hodgdon Retumbo delivers the highest muzzle velocity at 2,946 fps; across all powders the maximum-charge window runs from 1,867 fps to 2,946 fps. ADI AR 2225 gives the best case fill at 100 %, and 92 of the 92 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 145.0 gr projectile in 0.284" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, ADI AR 2225, ADI AR 2225 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 | 145gr | Barnes LRX BT 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.