Load Specifications
Load data in caliber .280 Rem. with .284 | 170gr | CutEdge MTH bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-17 and ReloadSwiss RS 60.
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 2495 | <<locked>> | 84% | 51,648 psi | 88% | 2493 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 50,560 psi | 86% | 2507 fps | 97.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,166 psi | 79% | 2533 fps | 98.7% |
| Accurate 4064 | <<locked>> | 86% | 51,982 psi | 88% | 2543 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 52,199 psi | 89% | 2638 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 50,531 psi | 86% | 2713 fps | 96.4% |
| ADI AR 2206H | <<locked>> | 82% | 52,083 psi | 89% | 2572 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 50,212 psi | 85% | 2533 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 50,560 psi | 86% | 2625 fps | 97.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 51,721 psi | 88% | 2684 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 52,779 psi | 90% | 2582 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 50,096 psi | 85% | 2549 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 50,473 psi | 86% | 2569 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 50,169 psi | 85% | 2644 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 50,981 psi | 87% | 2671 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,968 psi | 90% | 2664 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 46,238 psi | 79% | 2605 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,482 psi | 74% | 2552 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,247 psi | 65% | 2474 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,327 psi | 84% | 2726 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 51,779 psi | 88% | 2589 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 50,357 psi | 86% | 2562 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 46,238 psi | 79% | 2605 fps | 96.5% |
| Bofors RP7 | <<locked>> | 90% | 50,734 psi | 86% | 2549 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 86% | 51,198 psi | 87% | 2579 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 51,474 psi | 88% | 2638 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 90% | 51,808 psi | 88% | 2602 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 82% | 52,620 psi | 90% | 2579 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 50,067 psi | 85% | 2575 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 52,547 psi | 89% | 2618 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 51,358 psi | 87% | 2671 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,882 psi | 61% | 1585 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 50,604 psi | 86% | 2536 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,069 psi | 90% | 2559 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 52,852 psi | 90% | 2562 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 52,446 psi | 89% | 2546 fps | 98.8% |
| IMR 4350 | <<locked>> | 94% | 51,213 psi | 87% | 2575 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 52,620 psi | 90% | 2579 fps | 98.8% |
| IMR 4831 | <<locked>> | 96% | 52,866 psi | 90% | 2631 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 51,764 psi | 88% | 2595 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 51,880 psi | 88% | 2546 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 51,634 psi | 88% | 2507 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 52,750 psi | 90% | 2556 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 51,967 psi | 88% | 2569 fps | 99.5% |
| Lovex S070 | <<locked>> | 94% | 52,823 psi | 90% | 2602 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,130 psi | 65% | 2392 fps | 96.9% |
| Norma 201 | <<locked>> | 82% | 50,807 psi | 86% | 2520 fps | 100% |
| Norma 202 | <<locked>> | 82% | 51,430 psi | 88% | 2516 fps | 100% |
| Norma 203B | <<locked>> | 84% | 49,748 psi | 85% | 2556 fps | 100% |
| Norma 204 | <<locked>> | 94% | 51,372 psi | 87% | 2618 fps | 97.2% |
| Norma MRPᴾ | <<locked>> | 100% | 48,965 psi | 83% | 2684 fps | 98.4% |
| Norma URP | <<locked>> | 94% | 51,198 psi | 87% | 2625 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 50,038 psi | 85% | 2579 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 49,966 psi | 85% | 2621 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,332 psi | 62% | 1621 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 51,372 psi | 87% | 2562 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 51,053 psi | 87% | 2628 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 50,618 psi | 86% | 2661 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 52,054 psi | 89% | 2661 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 50,995 psi | 87% | 2684 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 51,459 psi | 88% | 2520 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 50,560 psi | 86% | 2559 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 52,170 psi | 89% | 2598 fps | 96.3% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,837 psi | 88% | 2651 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 50,734 psi | 86% | 2549 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 51,967 psi | 88% | 2569 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 51,880 psi | 88% | 2546 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 52,750 psi | 90% | 2556 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 52,823 psi | 90% | 2602 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 52,402 psi | 89% | 2618 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,011 psi | 90% | 2575 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 50,633 psi | 86% | 2549 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 52,083 psi | 89% | 2461 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 52,576 psi | 90% | 2464 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 51,663 psi | 88% | 2523 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,358 psi | 87% | 2644 fps | 97.6% |
| Somchem S335 | <<locked>> | 82% | 51,663 psi | 88% | 2461 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 52,692 psi | 90% | 2566 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 50,908 psi | 87% | 2556 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 49,676 psi | 85% | 2625 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,330 psi | 89% | 2628 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 82% | 52,562 psi | 89% | 2444 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 51,547 psi | 88% | 2487 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 52,141 psi | 89% | 2503 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 52,098 psi | 89% | 2536 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 50,111 psi | 85% | 2572 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,237 psi | 77% | 2503 fps | 96.7% |
| Vihtavuori N540 | <<locked>> | 84% | 50,241 psi | 86% | 2500 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 52,576 psi | 90% | 2625 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,341 psi | 82% | 2621 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 49,763 psi | 85% | 2549 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 51,474 psi | 88% | 2638 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,899 psi | 66% | 2589 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 50,415 psi | 86% | 2552 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 49,023 psi | 83% | 2566 fps | 96.8% |
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 2495 | <<locked>> | 80% | 45,266 psi | 77% | 2408 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,382 psi | 76% | 2408 fps | 96.6% |
| Accurate 3100 | <<locked>> | 92% | 34,708 psi | 59% | 2323 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 42,888 psi | 73% | 2411 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,937 psi | 54% | 2270 fps | 96.7% |
| Accurate High Country | <<locked>> | 98% | 46,963 psi | 80% | 2651 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 48,965 psi | 83% | 2526 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 41,611 psi | 71% | 2392 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 44,237 psi | 75% | 2516 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,150 psi | 77% | 2579 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 49,603 psi | 84% | 2533 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,466 psi | 71% | 2411 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,498 psi | 76% | 2474 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,097 psi | 55% | 2287 fps | 96.9% |
| Alliant Reloder-17 | 43.1 gr | 80% | 35,955 psi | 61% | 2402 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 94% | 43,627 psi | 74% | 2510 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 43,381 psi | 74% | 2552 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,179 psi | 45% | 2156 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,576 psi | 57% | 2362 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 88% | 31,995 psi | 54% | 2372 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,385 psi | 82% | 2536 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 41,162 psi | 70% | 2415 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 43,381 psi | 74% | 2552 fps | 95.7% |
| Bofors RP7 | <<locked>> | 82% | 39,218 psi | 67% | 2346 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 42,003 psi | 72% | 2425 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 36,666 psi | 62% | 2372 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 84% | 42,728 psi | 73% | 2448 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 49,458 psi | 84% | 2533 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,428 psi | 50% | 2188 fps | 97.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,687 psi | 78% | 2516 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 38,377 psi | 65% | 2434 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,614 psi | 45% | 1411 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,239 psi | 80% | 2487 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 49,690 psi | 85% | 2513 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,743 psi | 74% | 2421 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,079 psi | 78% | 2444 fps | 97.7% |
| IMR 4350 | <<locked>> | 86% | 39,697 psi | 68% | 2379 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,464 psi | 65% | 2329 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 30,980 psi | 53% | 2234 fps | 96.4% |
| IMR 4895 | <<locked>> | 80% | 45,643 psi | 78% | 2500 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 48,356 psi | 82% | 2497 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,588 psi | 83% | 2461 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 43,714 psi | 74% | 2421 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 35,766 psi | 61% | 2280 fps | 96.4% |
| Lovex S070 | <<locked>> | 82% | 36,318 psi | 62% | 2310 fps | 95.4% |
| Lovex S071 | <<locked>> | 96% | 33,301 psi | 57% | 2293 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 47,732 psi | 81% | 2474 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,269 psi | 82% | 2474 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,859 psi | 75% | 2461 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 44,889 psi | 76% | 2510 fps | 95.7% |
| Norma MRP | <<locked>> | 92% | 37,130 psi | 63% | 2454 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 32,184 psi | 55% | 2270 fps | 96.6% |
| Ramshot Big Game | <<locked>> | 80% | 43,830 psi | 75% | 2480 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 33,605 psi | 57% | 2313 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,093 psi | 46% | 1447 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,148 psi | 72% | 2408 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,500 psi | 81% | 2575 fps | 99.9% |
| ReloadSwiss RS 60 | 43.1 gr | 80% | 38,334 psi | 65% | 2457 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,560 psi | 54% | 2283 fps | 96.1% |
| ReloadSwiss RS 70 | 43.8 gr | 80% | 31,560 psi | 54% | 2290 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 45,353 psi | 77% | 2428 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,711 psi | 66% | 2365 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 96% | 48,965 psi | 83% | 2546 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 94% | 42,279 psi | 72% | 2490 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 82% | 39,218 psi | 67% | 2346 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,766 psi | 61% | 2280 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,356 psi | 82% | 2497 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,714 psi | 74% | 2421 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 36,318 psi | 62% | 2310 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,929 psi | 68% | 2415 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,472 psi | 84% | 2526 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,311 psi | 81% | 2497 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,805 psi | 83% | 2415 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,901 psi | 70% | 2297 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,362 psi | 64% | 2280 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 41,901 psi | 71% | 2484 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 48,602 psi | 83% | 2418 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,226 psi | 84% | 2516 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 39,508 psi | 67% | 2369 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 28,921 psi | 49% | 2234 fps | 98.7% |
| Somchem S385 | <<locked>> | 92% | 40,263 psi | 69% | 2425 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 49,327 psi | 84% | 2405 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,237 psi | 77% | 2398 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,687 psi | 78% | 2415 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,521 psi | 64% | 2306 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 33,692 psi | 57% | 2277 fps | 97.1% |
| Vihtavuori N165 | <<locked>> | 96% | 39,508 psi | 67% | 2398 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 44,150 psi | 75% | 2411 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,156 psi | 56% | 2277 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 84% | 28,326 psi | 48% | 2224 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,141 psi | 56% | 2254 fps | 98.8% |
| Winchester 760 | <<locked>> | 82% | 36,898 psi | 63% | 2375 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 86% | 24,482 psi | 42% | 2169 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,065 psi | 80% | 2503 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 42,656 psi | 73% | 2461 fps | 95.1% |
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 110 powders for .280 Rem. loaded with the .284 | 170gr | CutEdge MTH. Alliant Reloder-26 delivers the highest muzzle velocity at 2,726 fps; across all powders the maximum-charge window runs from 1,585 fps to 2,726 fps. Accurate 3100 gives the best case fill at 100 %, and 110 of the 110 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Accurate MAGPRO 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. ReloadSwiss RS 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .280 Rem. with the .284 | 170gr | CutEdge MTH they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Hodgdon H1000 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.