Load Specifications
Load data in caliber .280 Rem. with .285 | 173gr | Prvi Partizan SP bullet and 81 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 52,547 psi | 89% | 2543 fps | 98.8% |
| Accurate 3100 | <<locked>> | 98% | 50,009 psi | 85% | 2589 fps | 99.5% |
| Accurate 4064 | <<locked>> | 82% | 51,996 psi | 89% | 2533 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 52,431 psi | 89% | 2635 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 50,894 psi | 87% | 2717 fps | 97.3% |
| Accurate MAGPRO | <<locked>> | 98% | 51,895 psi | 88% | 2717 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 84% | 52,257 psi | 89% | 2562 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 49,893 psi | 85% | 2621 fps | 97.8% |
| ADI AR 2213 | <<locked>> | 98% | 50,865 psi | 87% | 2664 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 52,939 psi | 90% | 2585 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 52,939 psi | 90% | 2602 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 50,038 psi | 85% | 2638 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 50,633 psi | 86% | 2657 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 52,562 psi | 89% | 2664 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 49,734 psi | 85% | 2664 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,241 psi | 86% | 2651 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,729 psi | 74% | 2589 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 49,864 psi | 85% | 2730 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,733 psi | 83% | 2644 fps | 97.7% |
| Bofors RP3 | <<locked>> | 82% | 50,038 psi | 85% | 2549 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 49,734 psi | 85% | 2664 fps | 98% |
| Bofors RP7 | <<locked>> | 88% | 53,113 psi | 90% | 2589 fps | 99% |
| Hodgdon H380 | <<locked>> | 82% | 50,415 psi | 86% | 2566 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 51,227 psi | 87% | 2635 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 86% | 51,140 psi | 87% | 2592 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 96% | 51,227 psi | 87% | 2618 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 49,995 psi | 85% | 2598 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 50,082 psi | 85% | 2569 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,062 psi | 73% | 2621 fps | 97.1% |
| Hodgdon Superformance | <<locked>> | 88% | 50,662 psi | 86% | 2661 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,608 psi | 62% | 1611 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 51,663 psi | 88% | 2546 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 50,604 psi | 86% | 2572 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 51,430 psi | 88% | 2566 fps | 99.1% |
| IMR 4831 | <<locked>> | 92% | 52,968 psi | 90% | 2628 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 52,765 psi | 90% | 2608 fps | 96.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,880 psi | 88% | 2697 fps | 97.1% |
| Lovex S062 | <<locked>> | 82% | 51,909 psi | 88% | 2539 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 51,459 psi | 88% | 2562 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 52,460 psi | 89% | 2598 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,556 psi | 76% | 2503 fps | 98.9% |
| Norma 203B | <<locked>> | 82% | 52,243 psi | 89% | 2589 fps | 100% |
| Norma 204 | <<locked>> | 90% | 50,836 psi | 87% | 2612 fps | 97.8% |
| Norma MRP | <<locked>> | 98% | 52,794 psi | 90% | 2743 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 51,155 psi | 87% | 2618 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 52,808 psi | 90% | 2615 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,199 psi | 89% | 2710 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 90% | 49,937 psi | 85% | 2621 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,311 psi | 79% | 2592 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,130 psi | 63% | 1647 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 50,531 psi | 86% | 2552 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 50,125 psi | 85% | 2644 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 52,156 psi | 89% | 2657 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 50,734 psi | 86% | 2680 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,699 psi | 73% | 2615 fps | 98% |
| Rottweil R 903 | <<locked>> | 84% | 50,198 psi | 85% | 2546 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 51,735 psi | 88% | 2598 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 96% | 51,822 psi | 88% | 2651 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 53,113 psi | 90% | 2589 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 51,459 psi | 88% | 2562 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 51,909 psi | 88% | 2539 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 52,460 psi | 89% | 2598 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 51,735 psi | 88% | 2605 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 51,474 psi | 88% | 2448 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 50,981 psi | 87% | 2516 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 51,358 psi | 87% | 2644 fps | 98.3% |
| Somchem S355 | <<locked>> | 84% | 50,386 psi | 86% | 2543 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 53,026 psi | 90% | 2589 fps | 96.5% |
| Somchem S365 | <<locked>> | 92% | 50,328 psi | 86% | 2621 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 52,504 psi | 89% | 2631 fps | 99% |
| Vihtavuori N150 | <<locked>> | 86% | 51,372 psi | 87% | 2523 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 50,024 psi | 85% | 2569 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,837 psi | 88% | 2608 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 52,373 psi | 89% | 2523 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 52,489 psi | 89% | 2621 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 52,997 psi | 90% | 2680 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 49,617 psi | 84% | 2674 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 52,678 psi | 90% | 2585 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 51,227 psi | 87% | 2635 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,542 psi | 78% | 2713 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 52,475 psi | 89% | 2621 fps | 98.2% |
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% | 49,443 psi | 84% | 2497 fps | 98.3% |
| Accurate 3100 | <<locked>> | 84% | 31,198 psi | 53% | 2234 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 49,110 psi | 84% | 2490 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,246 psi | 63% | 2375 fps | 98.7% |
| Accurate High Country | 53.4 gr | 92% | 44,367 psi | 76% | 2602 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 96% | 48,356 psi | 82% | 2657 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 46,122 psi | 79% | 2467 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 41,191 psi | 70% | 2464 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 44,686 psi | 76% | 2556 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,659 psi | 79% | 2493 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,748 psi | 85% | 2552 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,463 psi | 62% | 2388 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,133 psi | 70% | 2500 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 40,886 psi | 70% | 2457 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 41,046 psi | 70% | 2507 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,760 psi | 46% | 2169 fps | 96.9% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,024 psi | 55% | 2323 fps | 96% |
| Alliant Reloder-26 | 47.9 gr | 80% | 28,369 psi | 48% | 2264 fps | 95% |
| Bofors RP15 | <<locked>> | 94% | 40,234 psi | 68% | 2490 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 46,920 psi | 80% | 2503 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 41,046 psi | 70% | 2507 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 41,379 psi | 70% | 2388 fps | 96.9% |
| Hodgdon H380 | <<locked>> | 80% | 47,326 psi | 81% | 2513 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 39,233 psi | 67% | 2421 fps | 96.9% |
| Hodgdon H4350 | <<locked>> | 80% | 42,163 psi | 72% | 2438 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 94% | 47,718 psi | 81% | 2559 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 46,891 psi | 80% | 2546 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,982 psi | 58% | 2290 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 98% | 40,234 psi | 68% | 2559 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 38,145 psi | 65% | 2431 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,267 psi | 46% | 1437 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,515 psi | 83% | 2497 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 37,101 psi | 63% | 2323 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,757 psi | 73% | 2415 fps | 97.6% |
| IMR 4831 | <<locked>> | 80% | 35,795 psi | 61% | 2333 fps | 98.5% |
| IMR 4955 Enduron | <<locked>> | 92% | 46,673 psi | 79% | 2507 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 96% | 45,585 psi | 78% | 2585 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 48,776 psi | 83% | 2493 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,437 psi | 69% | 2372 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 38,479 psi | 66% | 2352 fps | 96.9% |
| Lovex S071 | <<locked>> | 90% | 32,576 psi | 55% | 2264 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 49,110 psi | 84% | 2543 fps | 100% |
| Norma 204 | <<locked>> | 84% | 41,669 psi | 71% | 2454 fps | 95.6% |
| Norma MRP | 49.9 gr | 86% | 35,012 psi | 60% | 2405 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 36,999 psi | 63% | 2369 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 80% | 49,327 psi | 84% | 2562 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 45,310 psi | 77% | 2592 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 35,955 psi | 61% | 2362 fps | 96.8% |
| Ramshot Magnum | <<locked>> | 94% | 37,478 psi | 64% | 2421 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,804 psi | 47% | 1473 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,253 psi | 80% | 2500 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,685 psi | 74% | 2546 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,854 psi | 63% | 2392 fps | 98.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,868 psi | 61% | 2398 fps | 97.8% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 37,188 psi | 63% | 2487 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 44,150 psi | 75% | 2454 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 45,600 psi | 78% | 2497 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 88% | 39,856 psi | 68% | 2441 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 41,379 psi | 70% | 2388 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,437 psi | 69% | 2372 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 48,776 psi | 83% | 2493 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,479 psi | 66% | 2352 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,368 psi | 77% | 2507 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,542 psi | 78% | 2365 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,363 psi | 67% | 2320 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 39,508 psi | 67% | 2438 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 44,672 psi | 76% | 2454 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 46,717 psi | 80% | 2490 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 33,591 psi | 57% | 2333 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 35,665 psi | 61% | 2326 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 42,438 psi | 72% | 2385 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,450 psi | 65% | 2369 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 37,318 psi | 64% | 2356 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 49,269 psi | 84% | 2480 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,971 psi | 65% | 2372 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 80% | 29,240 psi | 50% | 2231 fps | 96.9% |
| Vihtavuori N560 | <<locked>> | 94% | 46,543 psi | 79% | 2621 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,521 psi | 64% | 2343 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 39,233 psi | 67% | 2421 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,569 psi | 40% | 2136 fps | 95.4% |
| Winchester Supreme 780 | <<locked>> | 90% | 39,769 psi | 68% | 2408 fps | 95.2% |
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 81 powders for .280 Rem. loaded with the .285 | 173gr | Prvi Partizan SP. Norma MRP delivers the highest muzzle velocity at 2,743 fps; across all powders the maximum-charge window runs from 1,611 fps to 2,743 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 81 of the 81 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 173.0 gr projectile in 0.285" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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 .285 | 173gr | Prvi Partizan SP 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.