Load Specifications
Load data in caliber .280 Rem. with .284 | 175gr | Sierra GameKing bullet and 85 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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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% | 51,503 psi | 88% | 2503 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,750 psi | 88% | 2589 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 50,792 psi | 86% | 2493 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 50,908 psi | 87% | 2589 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 52,997 psi | 90% | 2726 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 84% | 50,981 psi | 87% | 2520 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 51,822 psi | 88% | 2625 fps | 98% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,837 psi | 90% | 2671 fps | 97% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 52,997 psi | 90% | 2677 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 51,590 psi | 88% | 2543 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 51,909 psi | 88% | 2562 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 51,938 psi | 88% | 2641 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 52,649 psi | 90% | 2661 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 51,198 psi | 87% | 2618 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,517 psi | 88% | 2667 fps | 98.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,820 psi | 83% | 2612 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,641 psi | 73% | 2546 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 51,779 psi | 88% | 2733 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,500 psi | 81% | 2602 fps | 97.4% |
| Bofors RP3 | <<locked>> | 84% | 52,054 psi | 89% | 2556 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,517 psi | 88% | 2667 fps | 98.3% |
| Bofors RP7 | <<locked>> | 88% | 51,750 psi | 88% | 2543 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 52,504 psi | 89% | 2569 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 52,953 psi | 90% | 2635 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 88% | 53,098 psi | 90% | 2598 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 98% | 53,142 psi | 90% | 2621 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 98% | 51,851 psi | 88% | 2602 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 52,083 psi | 89% | 2572 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 41,539 psi | 71% | 2566 fps | 96.4% |
| Hodgdon Superformance | <<locked>> | 90% | 52,750 psi | 90% | 2667 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,361 psi | 62% | 1585 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 50,604 psi | 86% | 2507 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 52,953 psi | 90% | 2536 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 52,620 psi | 90% | 2575 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 50,386 psi | 86% | 2523 fps | 98.9% |
| IMR 4831 | <<locked>> | 92% | 51,329 psi | 87% | 2582 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 51,532 psi | 88% | 2562 fps | 96.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,444 psi | 86% | 2648 fps | 96.7% |
| Lovex S062 | <<locked>> | 82% | 50,821 psi | 87% | 2500 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 50,401 psi | 86% | 2520 fps | 99.6% |
| Lovex S070 | <<locked>> | 90% | 51,155 psi | 87% | 2556 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,134 psi | 73% | 2457 fps | 98.6% |
| Norma 203B | <<locked>> | 82% | 51,213 psi | 87% | 2549 fps | 100% |
| Norma 204 | <<locked>> | 92% | 53,113 psi | 90% | 2625 fps | 98.1% |
| Norma MRP | <<locked>> | 98% | 51,198 psi | 87% | 2694 fps | 99.2% |
| Norma URP | <<locked>> | 92% | 53,156 psi | 90% | 2625 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 51,372 psi | 87% | 2569 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 50,473 psi | 86% | 2657 fps | 97% |
| Ramshot Hunter | <<locked>> | 92% | 52,025 psi | 89% | 2628 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,860 psi | 76% | 2543 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,159 psi | 63% | 1627 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 52,678 psi | 90% | 2559 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 52,344 psi | 89% | 2654 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 50,575 psi | 86% | 2612 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 52,736 psi | 90% | 2687 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,234 psi | 70% | 2556 fps | 97.4% |
| Rottweil R 902 | <<locked>> | 82% | 52,678 psi | 90% | 2510 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 52,243 psi | 89% | 2552 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 50,343 psi | 86% | 2549 fps | 96.7% |
| Rottweil R 905 | <<locked>> | 96% | 50,299 psi | 86% | 2602 fps | 98% |
| Rottweil R 907 | <<locked>> | 88% | 51,750 psi | 88% | 2543 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 50,401 psi | 86% | 2520 fps | 99.6% |
| Shooters World Precision | <<locked>> | 82% | 50,821 psi | 87% | 2500 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 51,155 psi | 87% | 2556 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 50,256 psi | 86% | 2559 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 50,444 psi | 86% | 2408 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 53,084 psi | 90% | 2523 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 49,850 psi | 85% | 2598 fps | 97.9% |
| Somchem S355 | <<locked>> | 86% | 52,344 psi | 89% | 2549 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 51,663 psi | 88% | 2543 fps | 96.1% |
| Somchem S365 | <<locked>> | 94% | 52,040 psi | 89% | 2625 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 51,140 psi | 87% | 2585 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 82% | 52,997 psi | 90% | 2470 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,127 psi | 90% | 2487 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 50,227 psi | 86% | 2484 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 51,967 psi | 88% | 2572 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,995 psi | 85% | 2556 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 82% | 51,184 psi | 87% | 2484 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 50,923 psi | 87% | 2575 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 51,068 psi | 87% | 2631 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 51,721 psi | 88% | 2687 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 51,387 psi | 87% | 2546 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 49,908 psi | 85% | 2589 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,903 psi | 75% | 2664 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 50,952 psi | 87% | 2575 fps | 97.9% |
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% | 48,327 psi | 82% | 2454 fps | 98.1% |
| Accurate 3100 | <<locked>> | 86% | 32,358 psi | 55% | 2241 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 47,863 psi | 81% | 2451 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,187 psi | 62% | 2333 fps | 98.5% |
| Accurate High Country | 51.6 gr | 92% | 42,975 psi | 73% | 2556 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 45,063 psi | 77% | 2428 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 40,030 psi | 68% | 2415 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 96% | 46,499 psi | 79% | 2562 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,559 psi | 84% | 2625 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,556 psi | 78% | 2451 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,675 psi | 83% | 2513 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,534 psi | 60% | 2343 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,972 psi | 68% | 2457 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 39,740 psi | 68% | 2411 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 92% | 39,755 psi | 68% | 2457 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,020 psi | 44% | 2126 fps | 96.5% |
| Alliant Reloder-25 | <<locked>> | 90% | 31,154 psi | 53% | 2280 fps | 95.4% |
| Alliant Reloder-26 | 47.4 gr | 82% | 29,443 psi | 50% | 2277 fps | 95.6% |
| Bofors RP15 | <<locked>> | 94% | 39,233 psi | 67% | 2444 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 45,890 psi | 78% | 2464 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 39,755 psi | 68% | 2457 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 40,437 psi | 69% | 2346 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 80% | 46,079 psi | 78% | 2470 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 38,116 psi | 65% | 2375 fps | 96.5% |
| Hodgdon H4350 | <<locked>> | 80% | 41,249 psi | 70% | 2395 fps | 96% |
| Hodgdon H4831 | <<locked>> | 96% | 49,690 psi | 85% | 2569 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 48,805 psi | 83% | 2556 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,982 psi | 56% | 2247 fps | 99% |
| Hodgdon Retumbo | <<locked>> | 98% | 39,189 psi | 67% | 2510 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 37,072 psi | 63% | 2385 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,209 psi | 46% | 1414 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,413 psi | 81% | 2457 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,690 psi | 85% | 2487 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 36,216 psi | 62% | 2283 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,858 psi | 71% | 2375 fps | 97.3% |
| IMR 4831 | <<locked>> | 80% | 34,838 psi | 59% | 2290 fps | 98.2% |
| IMR 4955 Enduron | <<locked>> | 94% | 48,370 psi | 82% | 2510 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 98% | 47,181 psi | 80% | 2589 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 47,645 psi | 81% | 2454 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,479 psi | 67% | 2333 fps | 98.1% |
| Lovex S070 | <<locked>> | 80% | 37,565 psi | 64% | 2313 fps | 96.5% |
| Lovex S071 | <<locked>> | 90% | 31,386 psi | 53% | 2218 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 48,022 psi | 82% | 2500 fps | 100% |
| Norma 204 | <<locked>> | 84% | 40,466 psi | 69% | 2408 fps | 95.2% |
| Norma MRP | 49.4 gr | 88% | 36,477 psi | 62% | 2418 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 36,013 psi | 61% | 2329 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 80% | 48,167 psi | 82% | 2523 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 43,976 psi | 75% | 2543 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 34,954 psi | 60% | 2316 fps | 96.4% |
| Ramshot Magnum | <<locked>> | 96% | 39,073 psi | 67% | 2431 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,760 psi | 47% | 1450 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,137 psi | 79% | 2457 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,467 psi | 72% | 2503 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,940 psi | 61% | 2352 fps | 98.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 34,969 psi | 60% | 2356 fps | 97.5% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 36,013 psi | 61% | 2434 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 49,690 psi | 85% | 2467 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,047 psi | 73% | 2411 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 44,425 psi | 76% | 2451 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 88% | 38,609 psi | 66% | 2395 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 40,437 psi | 69% | 2346 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,479 psi | 67% | 2333 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 47,645 psi | 81% | 2454 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,565 psi | 64% | 2313 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,135 psi | 75% | 2464 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,715 psi | 76% | 2329 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,537 psi | 66% | 2280 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,944 psi | 70% | 2444 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 43,627 psi | 74% | 2415 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 48,544 psi | 83% | 2497 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 32,634 psi | 56% | 2293 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 36,840 psi | 63% | 2333 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 49,850 psi | 85% | 2431 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,806 psi | 85% | 2444 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,437 psi | 71% | 2349 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,463 psi | 64% | 2329 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 92% | 38,537 psi | 66% | 2359 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 48,037 psi | 82% | 2441 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,883 psi | 63% | 2329 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 28,485 psi | 48% | 2195 fps | 96.6% |
| Vihtavuori N560 | <<locked>> | 96% | 48,095 psi | 82% | 2625 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,680 psi | 62% | 2303 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 38,348 psi | 65% | 2382 fps | 96.6% |
| Winchester StaBALL HD | <<locked>> | 82% | 24,366 psi | 41% | 2149 fps | 96.1% |
| Winchester Supreme 780 | <<locked>> | 92% | 41,481 psi | 71% | 2418 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 85 powders for .280 Rem. loaded with the .284 | 175gr | Sierra GameKing. Alliant Reloder-26 delivers the highest muzzle velocity at 2,733 fps; across all powders the maximum-charge window runs from 1,585 fps to 2,733 fps. Accurate 3100 gives the best case fill at 100 %, and 85 of the 85 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 175.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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 | 175gr | Sierra GameKing 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.