Load Specifications
Load data in caliber .280 Rem. with .284 | 170gr | Sierra RN Prohunter bullet and 80 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate High Country and Norma MRP.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 51,692 psi | 88% | 2549 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,301 psi | 89% | 2641 fps | 99.6% |
| Accurate 4064 | <<locked>> | 82% | 51,242 psi | 87% | 2546 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 51,285 psi | 87% | 2641 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 49,763 psi | 85% | 2717 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 84% | 51,358 psi | 87% | 2572 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 52,199 psi | 89% | 2677 fps | 98% |
| ADI AR 2213 | <<locked>> | 98% | 49,937 psi | 85% | 2667 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 51,953 psi | 88% | 2592 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 52,286 psi | 89% | 2612 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 52,286 psi | 89% | 2694 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 49,530 psi | 84% | 2661 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 51,547 psi | 88% | 2667 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,330 psi | 89% | 2726 fps | 98.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,139 psi | 84% | 2657 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,844 psi | 73% | 2589 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 52,431 psi | 89% | 2789 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,718 psi | 81% | 2648 fps | 97.3% |
| Bofors RP3 | <<locked>> | 84% | 52,634 psi | 90% | 2608 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,330 psi | 89% | 2726 fps | 98.3% |
| Bofors RP7 | <<locked>> | 88% | 52,199 psi | 89% | 2595 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 53,026 psi | 90% | 2625 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 50,227 psi | 86% | 2638 fps | 99% |
| Hodgdon H4350 | <<locked>> | 86% | 50,212 psi | 85% | 2598 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 98% | 52,388 psi | 89% | 2654 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 52,359 psi | 89% | 2621 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,177 psi | 72% | 2618 fps | 96.4% |
| Hodgdon Superformance | <<locked>> | 88% | 49,647 psi | 85% | 2664 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,448 psi | 62% | 1621 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 50,778 psi | 86% | 2552 fps | 100% |
| IMR 4350 | <<locked>> | 92% | 52,823 psi | 90% | 2625 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 50,560 psi | 86% | 2572 fps | 98.8% |
| IMR 4831 | <<locked>> | 92% | 51,924 psi | 88% | 2635 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 51,909 psi | 88% | 2612 fps | 96.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,879 psi | 87% | 2697 fps | 96.6% |
| Lovex S062 | <<locked>> | 82% | 50,981 psi | 87% | 2549 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 50,575 psi | 86% | 2569 fps | 99.6% |
| Lovex S070 | <<locked>> | 90% | 51,808 psi | 88% | 2608 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,584 psi | 74% | 2507 fps | 98.6% |
| Norma 203B | <<locked>> | 82% | 51,590 psi | 88% | 2602 fps | 100% |
| Norma 204 | <<locked>> | 90% | 49,850 psi | 85% | 2618 fps | 97.4% |
| Norma MRP | <<locked>> | 98% | 51,605 psi | 88% | 2746 fps | 99.2% |
| Norma URP | <<locked>> | 90% | 50,459 psi | 86% | 2628 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 51,837 psi | 88% | 2621 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,155 psi | 87% | 2713 fps | 97% |
| Ramshot Hunter | <<locked>> | 92% | 52,431 psi | 89% | 2677 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,382 psi | 77% | 2595 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,956 psi | 63% | 1657 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 53,084 psi | 90% | 2612 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 52,649 psi | 90% | 2703 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 51,039 psi | 87% | 2661 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 53,026 psi | 90% | 2736 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,872 psi | 71% | 2612 fps | 97.4% |
| Rottweil R 902 | <<locked>> | 82% | 52,881 psi | 90% | 2559 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 52,808 psi | 90% | 2605 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 50,778 psi | 86% | 2602 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 96% | 50,749 psi | 86% | 2654 fps | 98% |
| Rottweil R 907 | <<locked>> | 88% | 52,199 psi | 89% | 2595 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 50,575 psi | 86% | 2569 fps | 99.6% |
| Shooters World Precision | <<locked>> | 82% | 50,981 psi | 87% | 2549 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 51,808 psi | 88% | 2608 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 50,720 psi | 86% | 2612 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 50,618 psi | 86% | 2454 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 50,111 psi | 85% | 2523 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 50,299 psi | 86% | 2648 fps | 97.9% |
| Somchem S355 | <<locked>> | 86% | 52,649 psi | 90% | 2598 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 52,098 psi | 89% | 2595 fps | 96% |
| Somchem S365 | <<locked>> | 94% | 52,620 psi | 90% | 2677 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 51,474 psi | 88% | 2635 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 86% | 50,734 psi | 86% | 2533 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 52,315 psi | 89% | 2621 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,488 psi | 86% | 2608 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 82% | 51,764 psi | 88% | 2536 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 51,474 psi | 88% | 2628 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 51,822 psi | 88% | 2684 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 52,098 psi | 89% | 2736 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 51,692 psi | 88% | 2592 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 50,227 psi | 86% | 2638 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,556 psi | 76% | 2717 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 51,430 psi | 88% | 2628 fps | 97.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 80% | 48,588 psi | 83% | 2500 fps | 98% |
| Accurate 3100 | <<locked>> | 86% | 32,779 psi | 56% | 2287 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 48,138 psi | 82% | 2500 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,579 psi | 62% | 2382 fps | 98.4% |
| Accurate High Country | 53.2 gr | 92% | 43,323 psi | 74% | 2602 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 45,556 psi | 78% | 2477 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 40,379 psi | 69% | 2464 fps | 95% |
| ADI AR 2213 | <<locked>> | 96% | 46,789 psi | 80% | 2612 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,803 psi | 78% | 2497 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,110 psi | 84% | 2566 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,723 psi | 61% | 2388 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,234 psi | 68% | 2503 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 40,074 psi | 68% | 2461 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 92% | 40,176 psi | 68% | 2507 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,179 psi | 45% | 2165 fps | 96.3% |
| Alliant Reloder-25 | <<locked>> | 90% | 31,401 psi | 53% | 2323 fps | 95.3% |
| Alliant Reloder-26 | 48.9 gr | 82% | 29,733 psi | 51% | 2320 fps | 95.5% |
| Bofors RP15 | <<locked>> | 96% | 42,221 psi | 72% | 2546 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 46,006 psi | 78% | 2510 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 40,176 psi | 68% | 2507 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 40,611 psi | 69% | 2392 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 80% | 46,427 psi | 79% | 2520 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 38,435 psi | 65% | 2421 fps | 96.4% |
| Hodgdon H4350 | <<locked>> | 80% | 41,336 psi | 70% | 2441 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 96% | 49,052 psi | 84% | 2602 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,228 psi | 57% | 2290 fps | 99% |
| Hodgdon Retumbo | <<locked>> | 98% | 39,421 psi | 67% | 2556 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 37,405 psi | 64% | 2431 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,093 psi | 46% | 1444 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,935 psi | 82% | 2510 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 36,347 psi | 62% | 2326 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,032 psi | 72% | 2421 fps | 97.2% |
| IMR 4831 | <<locked>> | 80% | 35,230 psi | 60% | 2339 fps | 98.1% |
| IMR 4955 Enduron | <<locked>> | 94% | 48,791 psi | 83% | 2562 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 98% | 47,688 psi | 81% | 2641 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 48,167 psi | 82% | 2507 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,653 psi | 68% | 2375 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 37,913 psi | 65% | 2359 fps | 96.5% |
| Lovex S071 | <<locked>> | 90% | 31,763 psi | 54% | 2264 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 48,486 psi | 83% | 2552 fps | 100% |
| Norma 204 | <<locked>> | 84% | 40,857 psi | 70% | 2457 fps | 95.1% |
| Norma MRP | 50.9 gr | 88% | 36,709 psi | 62% | 2464 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 36,434 psi | 62% | 2375 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 80% | 48,660 psi | 83% | 2575 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 44,382 psi | 76% | 2592 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 35,230 psi | 60% | 2362 fps | 96.3% |
| Ramshot Magnum | <<locked>> | 96% | 39,450 psi | 67% | 2480 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,615 psi | 47% | 1480 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,441 psi | 79% | 2507 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,772 psi | 73% | 2552 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,216 psi | 62% | 2398 fps | 98.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,346 psi | 60% | 2405 fps | 97.4% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 36,463 psi | 62% | 2484 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 49,937 psi | 85% | 2516 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,526 psi | 74% | 2464 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 44,744 psi | 76% | 2497 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 88% | 38,986 psi | 66% | 2441 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 40,611 psi | 69% | 2392 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,653 psi | 68% | 2375 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 48,167 psi | 82% | 2507 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,913 psi | 65% | 2359 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,454 psi | 76% | 2510 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,744 psi | 76% | 2372 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,885 psi | 66% | 2326 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,234 psi | 70% | 2490 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 43,830 psi | 75% | 2461 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 48,776 psi | 83% | 2539 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 32,808 psi | 56% | 2336 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 37,202 psi | 63% | 2379 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 41,843 psi | 71% | 2398 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,869 psi | 64% | 2375 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 92% | 38,986 psi | 66% | 2408 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 48,399 psi | 82% | 2490 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,159 psi | 63% | 2375 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 80% | 28,674 psi | 49% | 2234 fps | 96.4% |
| Vihtavuori N560 | <<locked>> | 96% | 48,588 psi | 83% | 2677 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,811 psi | 63% | 2346 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 38,653 psi | 66% | 2425 fps | 96.5% |
| Winchester StaBALL HD | <<locked>> | 82% | 24,656 psi | 42% | 2192 fps | 96% |
| Winchester Supreme 780 | <<locked>> | 92% | 41,858 psi | 71% | 2467 fps | 95.6% |
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 80 powders for .280 Rem. loaded with the .284 | 170gr | Sierra RN Prohunter. Alliant Reloder-26 delivers the highest muzzle velocity at 2,789 fps; across all powders the maximum-charge window runs from 1,621 fps to 2,789 fps. Accurate 3100 gives the best case fill at 100 %, and 80 of the 80 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 62–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.284" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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. Alliant Reloder-26, Accurate High Country, Norma MRP rank at the top here: for .280 Rem. with the .284 | 170gr | Sierra RN Prohunter 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.