Load Specifications
Bullet:.284 | 180gr | CutEdge MTH
Bullet Manufacturer:Cutting Edge
Bullet Weight:180 gr
Bullet Diameter:0.284"
Bullet Length:<<locked>>
Caliber:.280 Ackley Improved load data
Case Length (l3):2.54"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:74 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:65,000 psi
Recommended Twist Rate:1:8.0
Load data in caliber .280 Ackley Improved with .284 | 180gr | CutEdge MTH bullet and 106 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and Hodgdon Superformance.
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% | 57,972 psi | 89% | 2516 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,999 psi | 86% | 2556 fps | 99.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,403 psi | 82% | 2598 fps | 99.9% |
| Accurate 4064 | <<locked>> | 86% | 58,523 psi | 90% | 2572 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,796 psi | 86% | 2638 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 55,869 psi | 86% | 2740 fps | 97.5% |
| ADI AR 2206H | <<locked>> | 82% | 57,624 psi | 89% | 2605 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,347 psi | 85% | 2566 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,956 psi | 88% | 2690 fps | 99.2% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,520 psi | 84% | 2687 fps | 98% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 58,697 psi | 90% | 2733 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,333 psi | 87% | 2589 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,333 psi | 87% | 2608 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,971 psi | 88% | 2694 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 58,262 psi | 90% | 2713 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,202 psi | 86% | 2677 fps | 99.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,330 psi | 82% | 2680 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,328 psi | 77% | 2612 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,700 psi | 67% | 2556 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 58,088 psi | 89% | 2799 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,667 psi | 89% | 2625 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,805 psi | 75% | 2612 fps | 98.2% |
| Bofors RP3 | <<locked>> | 86% | 56,811 psi | 87% | 2598 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,330 psi | 82% | 2680 fps | 99% |
| Bofors RP7 | <<locked>> | 90% | 56,318 psi | 87% | 2595 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 43,352 psi | 67% | 2493 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 86% | 57,246 psi | 88% | 2621 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 58,175 psi | 89% | 2694 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 90% | 58,204 psi | 90% | 2657 fps | 99.5% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 58,769 psi | 90% | 2690 fps | 98.1% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 57,334 psi | 88% | 2671 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 82% | 58,305 psi | 90% | 2608 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 57,130 psi | 88% | 2618 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,027 psi | 85% | 2602 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,757 psi | 66% | 2585 fps | 97.7% |
| Hodgdon Superformance | <<locked>> | 90% | 54,708 psi | 84% | 2680 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,390 psi | 56% | 1578 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,956 psi | 86% | 2569 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 58,320 psi | 90% | 2592 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,638 psi | 89% | 2589 fps | 99.8% |
| IMR 4350 | <<locked>> | 94% | 57,261 psi | 88% | 2628 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 90% | 58,001 psi | 89% | 2618 fps | 99.8% |
| IMR 4831 | <<locked>> | 94% | 56,376 psi | 87% | 2631 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,827 psi | 89% | 2631 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,304 psi | 87% | 2621 fps | 97.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,808 psi | 80% | 2661 fps | 97.7% |
| Lovex D073.6 | <<locked>> | 82% | 58,189 psi | 90% | 2575 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 56,463 psi | 87% | 2533 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 58,363 psi | 90% | 2582 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 57,943 psi | 89% | 2612 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 55,927 psi | 86% | 2608 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,222 psi | 68% | 2461 fps | 99.2% |
| Norma 201 | <<locked>> | 82% | 56,072 psi | 86% | 2546 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,130 psi | 88% | 2543 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,622 psi | 86% | 2592 fps | 100% |
| Norma 204 | <<locked>> | 94% | 58,349 psi | 90% | 2684 fps | 99.2% |
| Norma MRPᴾ | <<locked>> | 100% | 56,797 psi | 87% | 2759 fps | 99.9% |
| Norma URP | <<locked>> | 94% | 58,494 psi | 90% | 2674 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,478 psi | 87% | 2621 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,170 psi | 80% | 2677 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 94% | 57,101 psi | 88% | 2684 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,485 psi | 72% | 2562 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,144 psi | 57% | 1617 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,261 psi | 88% | 2608 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,725 psi | 89% | 2671 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,928 psi | 89% | 2703 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,680 psi | 86% | 2664 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 58,363 psi | 90% | 2746 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,554 psi | 65% | 2582 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 84% | 57,000 psi | 88% | 2549 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,029 psi | 88% | 2598 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 58,581 psi | 90% | 2657 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 98% | 55,434 psi | 85% | 2664 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 90% | 56,318 psi | 87% | 2595 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 57,943 psi | 89% | 2612 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 58,189 psi | 90% | 2575 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 58,363 psi | 90% | 2582 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,927 psi | 86% | 2608 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,230 psi | 85% | 2608 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,188 psi | 86% | 2582 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,246 psi | 88% | 2480 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 58,175 psi | 89% | 2484 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,725 psi | 89% | 2572 fps | 99.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 58,784 psi | 90% | 2713 fps | 99.5% |
| Somchem S335 | <<locked>> | 82% | 56,623 psi | 87% | 2477 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 58,639 psi | 90% | 2598 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,014 psi | 88% | 2592 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 56,623 psi | 87% | 2605 fps | 97.6% |
| Somchem S365 | <<locked>> | 96% | 57,624 psi | 89% | 2671 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,999 psi | 86% | 2641 fps | 99.6% |
| Vihtavuori N133 | <<locked>> | 82% | 57,856 psi | 89% | 2461 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,406 psi | 88% | 2507 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,667 psi | 89% | 2523 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 58,436 psi | 90% | 2569 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,811 psi | 87% | 2618 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,677 psi | 80% | 2569 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 84% | 55,680 psi | 86% | 2523 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,753 psi | 86% | 2628 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,231 psi | 87% | 2680 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 57,116 psi | 88% | 2753 fps | 98.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 45,049 psi | 69% | 2556 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,623 psi | 87% | 2592 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 58,523 psi | 90% | 2697 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,353 psi | 70% | 2674 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,405 psi | 87% | 2589 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,449 psi | 87% | 2641 fps | 99.1% |
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% | 51,039 psi | 79% | 2434 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,066 psi | 75% | 2454 fps | 98.7% |
| Accurate 3100 | <<locked>> | 84% | 30,661 psi | 47% | 2195 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 48,443 psi | 75% | 2444 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,767 psi | 57% | 2333 fps | 99% |
| Accurate MAGPRO | <<locked>> | 96% | 48,196 psi | 74% | 2621 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 54,099 psi | 83% | 2556 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,948 psi | 71% | 2428 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 38,522 psi | 59% | 2375 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 94% | 44,628 psi | 69% | 2523 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,039 psi | 79% | 2628 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,456 psi | 71% | 2451 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,559 psi | 76% | 2510 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,216 psi | 56% | 2349 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,031 psi | 63% | 2461 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 38,087 psi | 59% | 2369 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 90% | 38,218 psi | 59% | 2418 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,252 psi | 40% | 2129 fps | 97.4% |
| Alliant Reloder-25 | <<locked>> | 88% | 29,834 psi | 46% | 2241 fps | 95.6% |
| Alliant Reloder-26 | 47.2 gr | 80% | 27,789 psi | 43% | 2224 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 54,172 psi | 83% | 2579 fps | 100% |
| Bofors RP15 | <<locked>> | 92% | 37,724 psi | 58% | 2405 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 46,601 psi | 72% | 2461 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 38,218 psi | 59% | 2418 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 41,046 psi | 63% | 2349 fps | 97.3% |
| Hodgdon H1000 | <<locked>> | 98% | 40,553 psi | 62% | 2438 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 47,108 psi | 72% | 2474 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 39,044 psi | 60% | 2382 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 80% | 42,032 psi | 65% | 2402 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 92% | 44,672 psi | 69% | 2474 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 46,891 psi | 72% | 2513 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 54,694 psi | 84% | 2562 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,649 psi | 52% | 2251 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,590 psi | 79% | 2556 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 37,594 psi | 58% | 2470 fps | 95.8% |
| Hodgdon Superformance | 48.7 gr | 80% | 37,855 psi | 58% | 2395 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,151 psi | 42% | 1407 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,504 psi | 81% | 2523 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,341 psi | 74% | 2454 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,836 psi | 78% | 2490 fps | 99.4% |
| IMR 4350 | <<locked>> | 80% | 36,840 psi | 57% | 2287 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,598 psi | 66% | 2379 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 35,418 psi | 54% | 2293 fps | 98.8% |
| IMR 4895 | <<locked>> | 80% | 50,879 psi | 78% | 2536 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 43,685 psi | 67% | 2421 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 94% | 42,395 psi | 65% | 2493 fps | 95.2% |
| Lovex D073.6 | <<locked>> | 80% | 54,549 psi | 84% | 2533 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 53,055 psi | 82% | 2487 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,443 psi | 75% | 2451 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,030 psi | 62% | 2333 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 38,043 psi | 59% | 2313 fps | 97.3% |
| Lovex S071 | <<locked>> | 88% | 29,907 psi | 46% | 2175 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 52,910 psi | 81% | 2503 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,577 psi | 82% | 2500 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,907 psi | 75% | 2500 fps | 100% |
| Norma 204 | <<locked>> | 82% | 38,754 psi | 60% | 2362 fps | 95.4% |
| Norma MRP | <<locked>> | 86% | 34,809 psi | 54% | 2372 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 36,724 psi | 56% | 2329 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 80% | 49,356 psi | 76% | 2523 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 42,105 psi | 65% | 2500 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 35,766 psi | 55% | 2326 fps | 97.3% |
| Ramshot Magnum | <<locked>> | 94% | 37,260 psi | 57% | 2388 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,659 psi | 43% | 1444 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,152 psi | 73% | 2461 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,983 psi | 83% | 2621 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,671 psi | 67% | 2507 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,593 psi | 56% | 2352 fps | 98.8% |
| ReloadSwiss RS 70 | 46.8 gr | 80% | 35,694 psi | 55% | 2365 fps | 98.3% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 34,316 psi | 53% | 2392 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 50,430 psi | 78% | 2464 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,729 psi | 67% | 2408 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 42,540 psi | 65% | 2408 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 86% | 37,159 psi | 57% | 2356 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 41,046 psi | 63% | 2349 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,030 psi | 62% | 2333 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 54,549 psi | 84% | 2533 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 48,443 psi | 75% | 2451 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,043 psi | 59% | 2313 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,281 psi | 70% | 2464 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,765 psi | 81% | 2536 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,621 psi | 82% | 2434 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,295 psi | 70% | 2320 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,015 psi | 60% | 2283 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 36,811 psi | 57% | 2349 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 53,490 psi | 82% | 2438 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 55,056 psi | 85% | 2552 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,309 psi | 68% | 2411 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 46,325 psi | 71% | 2451 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 33,257 psi | 51% | 2293 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 35,143 psi | 54% | 2287 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 54,273 psi | 83% | 2418 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,560 psi | 78% | 2421 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,763 psi | 78% | 2438 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,148 psi | 65% | 2346 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,189 psi | 59% | 2329 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 90% | 37,028 psi | 57% | 2320 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 49,095 psi | 76% | 2438 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,652 psi | 58% | 2333 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 28,906 psi | 44% | 2195 fps | 97.4% |
| Vihtavuori N560 | <<locked>> | 92% | 43,352 psi | 67% | 2530 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 98% | 42,119 psi | 65% | 2503 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,405 psi | 58% | 2306 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 39,044 psi | 60% | 2382 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,047 psi | 35% | 2103 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,649 psi | 81% | 2539 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 39,537 psi | 61% | 2375 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 106 powders for .280 Ackley Improved loaded with the .284 | 180gr | CutEdge MTH. Alliant Reloder-26 delivers the highest muzzle velocity at 2,799 fps; across all powders the maximum-charge window runs from 1,578 fps to 2,799 fps. Accurate 3100 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.284" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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, ReloadSwiss RS 70, Hodgdon Superformance rank at the top here: for .280 Ackley Improved with the .284 | 180gr | CutEdge MTH 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.