Load Specifications
Bullet:.284 | 160gr | CutEdge MTH
Bullet Manufacturer:Cutting Edge
Bullet Weight:160 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:1:9.0
Load data in caliber .280 Ackley Improved with .284 | 160gr | CutEdge MTH bullet and 111 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% | 55,811 psi | 86% | 2664 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,914 psi | 89% | 2746 fps | 99.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,126 psi | 79% | 2726 fps | 99.4% |
| Accurate 4064 | <<locked>> | 86% | 56,420 psi | 87% | 2723 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 57,363 psi | 88% | 2835 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 55,738 psi | 86% | 2753 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,014 psi | 88% | 2759 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 58,436 psi | 90% | 2877 fps | 98.7% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,446 psi | 81% | 2812 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 58,001 psi | 89% | 2746 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,536 psi | 87% | 2884 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,783 psi | 89% | 2782 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,870 psi | 89% | 2802 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 58,262 psi | 90% | 2887 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,811 psi | 86% | 2861 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,754 psi | 89% | 2867 fps | 98.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,024 psi | 78% | 2808 fps | 97.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,080 psi | 74% | 2746 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,756 psi | 64% | 2667 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,245 psi | 85% | 2936 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,680 psi | 86% | 2772 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,630 psi | 72% | 2730 fps | 96.8% |
| Bofors RP3 | <<locked>> | 88% | 58,653 psi | 90% | 2799 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,024 psi | 78% | 2808 fps | 97.9% |
| Bofors RP7 | <<locked>> | 92% | 57,783 psi | 89% | 2785 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 82% | 58,015 psi | 89% | 2779 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 55,274 psi | 85% | 2766 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 55,956 psi | 86% | 2831 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 90% | 55,883 psi | 86% | 2792 fps | 98.6% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,420 psi | 87% | 2822 fps | 96.8% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 55,129 psi | 85% | 2799 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 82% | 56,376 psi | 87% | 2762 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 58,276 psi | 90% | 2805 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,565 psi | 87% | 2799 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,289 psi | 87% | 2871 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,274 psi | 56% | 1696 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,537 psi | 89% | 2762 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,072 psi | 88% | 2736 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,579 psi | 87% | 2743 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,898 psi | 86% | 2730 fps | 99.4% |
| IMR 4350 | <<locked>> | 96% | 58,769 psi | 90% | 2815 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,130 psi | 86% | 2759 fps | 99.3% |
| IMR 4831 | <<locked>> | 96% | 57,740 psi | 89% | 2822 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,898 psi | 86% | 2782 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 57,783 psi | 89% | 2805 fps | 97.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 49,806 psi | 77% | 2782 fps | 96.1% |
| IMR 8208 XBR | <<locked>> | 82% | 58,001 psi | 89% | 2746 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,130 psi | 86% | 2726 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 58,030 psi | 89% | 2726 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,536 psi | 87% | 2733 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,115 psi | 86% | 2756 fps | 99.9% |
| Lovex S070 | <<locked>> | 94% | 57,305 psi | 88% | 2795 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,177 psi | 65% | 2579 fps | 98.1% |
| Norma 201 | <<locked>> | 84% | 57,798 psi | 89% | 2743 fps | 100% |
| Norma 202 | <<locked>> | 84% | 58,798 psi | 90% | 2740 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,116 psi | 88% | 2789 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,231 psi | 87% | 2818 fps | 98.3% |
| Norma MRPᴾ | <<locked>> | 100% | 54,244 psi | 83% | 2894 fps | 99.4% |
| Norma URP | <<locked>> | 94% | 56,072 psi | 86% | 2818 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 58,305 psi | 90% | 2818 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 50,024 psi | 77% | 2795 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 96% | 58,755 psi | 90% | 2877 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,353 psi | 68% | 2674 fps | 96.9% |
| Ramshot TAC | <<locked>> | 82% | 58,102 psi | 89% | 2779 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 82% | 58,436 psi | 90% | 2792 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,680 psi | 56% | 1732 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,245 psi | 85% | 2749 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,477 psi | 85% | 2822 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,419 psi | 85% | 2851 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,261 psi | 88% | 2854 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,782 psi | 86% | 2884 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,727 psi | 63% | 2680 fps | 96.8% |
| Rottweil R 901 | <<locked>> | 82% | 58,349 psi | 90% | 2713 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 58,349 psi | 90% | 2740 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 58,523 psi | 90% | 2792 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,608 psi | 87% | 2795 fps | 97.5% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,724 psi | 87% | 2851 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 92% | 57,783 psi | 89% | 2785 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,115 psi | 86% | 2756 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,130 psi | 86% | 2726 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,536 psi | 87% | 2733 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,305 psi | 88% | 2795 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,782 psi | 87% | 2805 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,072 psi | 88% | 2762 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,957 psi | 89% | 2779 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,332 psi | 85% | 2628 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,188 psi | 86% | 2631 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,709 psi | 86% | 2710 fps | 99.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,231 psi | 87% | 2844 fps | 98.6% |
| Somchem S335 | <<locked>> | 84% | 58,378 psi | 90% | 2671 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,652 psi | 87% | 2746 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 58,363 psi | 90% | 2785 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 58,494 psi | 90% | 2789 fps | 97.1% |
| Somchem S365 | <<locked>> | 96% | 54,969 psi | 85% | 2815 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,421 psi | 88% | 2825 fps | 99.3% |
| Vihtavuori N133 | <<locked>> | 82% | 55,898 psi | 86% | 2612 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,317 psi | 85% | 2654 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,622 psi | 86% | 2674 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,347 psi | 87% | 2713 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 58,407 psi | 90% | 2812 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,647 psi | 76% | 2694 fps | 97.9% |
| Vihtavuori N530 | <<locked>> | 82% | 58,479 psi | 90% | 2746 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 57,377 psi | 88% | 2717 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,406 psi | 88% | 2818 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,722 psi | 83% | 2818 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,708 psi | 84% | 2884 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 58,160 psi | 89% | 2779 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,275 psi | 87% | 2838 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,337 psi | 67% | 2799 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 58,001 psi | 89% | 2782 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,998 psi | 83% | 2769 fps | 98.1% |
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% | 48,849 psi | 75% | 2572 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,558 psi | 73% | 2585 fps | 97.6% |
| Accurate 3100 | <<locked>> | 88% | 33,605 psi | 52% | 2402 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 46,296 psi | 71% | 2579 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,157 psi | 54% | 2448 fps | 97.8% |
| ADI AR 2206H | <<locked>> | 80% | 52,475 psi | 81% | 2703 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,483 psi | 68% | 2562 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 42,177 psi | 65% | 2598 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 98% | 48,921 psi | 75% | 2753 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,621 psi | 84% | 2700 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,965 psi | 75% | 2769 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,715 psi | 69% | 2585 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,950 psi | 74% | 2651 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,621 psi | 53% | 2461 fps | 98% |
| Alliant Reloder-17 | 48.7 gr | 80% | 39,131 psi | 60% | 2582 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 41,742 psi | 64% | 2592 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 41,727 psi | 64% | 2638 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,005 psi | 38% | 2215 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,329 psi | 50% | 2438 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 84% | 30,545 psi | 47% | 2434 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,185 psi | 80% | 2720 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 40,886 psi | 63% | 2618 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 44,831 psi | 69% | 2592 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 41,727 psi | 64% | 2638 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 39,595 psi | 61% | 2470 fps | 95.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 54,302 psi | 84% | 2730 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 45,368 psi | 70% | 2605 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 37,405 psi | 58% | 2497 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 40,509 psi | 62% | 2520 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 96% | 49,081 psi | 76% | 2703 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 51,401 psi | 79% | 2743 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 53,040 psi | 82% | 2713 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,053 psi | 49% | 2356 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,443 psi | 76% | 2694 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 39,030 psi | 60% | 2562 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,079 psi | 42% | 1512 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,662 psi | 78% | 2664 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,534 psi | 82% | 2690 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,775 psi | 72% | 2595 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,052 psi | 75% | 2621 fps | 98.5% |
| IMR 4350 | <<locked>> | 82% | 37,840 psi | 58% | 2454 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,133 psi | 63% | 2503 fps | 96.8% |
| IMR 4831 | <<locked>> | 80% | 33,808 psi | 52% | 2402 fps | 97.5% |
| IMR 4895 | <<locked>> | 80% | 49,182 psi | 76% | 2677 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 47,950 psi | 74% | 2648 fps | 95% |
| IMR 7828 SSC | <<locked>> | 98% | 46,702 psi | 72% | 2726 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 54,621 psi | 84% | 2700 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,460 psi | 81% | 2677 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,503 psi | 79% | 2631 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,833 psi | 72% | 2592 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,363 psi | 59% | 2448 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 36,564 psi | 56% | 2428 fps | 95.7% |
| Lovex S071 | <<locked>> | 92% | 32,401 psi | 50% | 2372 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 50,879 psi | 78% | 2644 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,764 psi | 80% | 2644 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,297 psi | 73% | 2638 fps | 100% |
| Norma 204 | <<locked>> | 86% | 42,714 psi | 66% | 2589 fps | 95.4% |
| Norma MRP | <<locked>> | 90% | 38,072 psi | 59% | 2589 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 35,128 psi | 54% | 2444 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 80% | 47,456 psi | 73% | 2661 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 46,499 psi | 72% | 2733 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 34,200 psi | 53% | 2434 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 98% | 41,278 psi | 64% | 2612 fps | 96% |
| Ramshot TAC | <<locked>> | 80% | 54,520 psi | 84% | 2726 fps | 99.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 54,491 psi | 84% | 2740 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,514 psi | 42% | 1549 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,382 psi | 70% | 2589 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,764 psi | 80% | 2766 fps | 100% |
| ReloadSwiss RS 60 | 48.7 gr | 80% | 41,655 psi | 64% | 2635 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,969 psi | 54% | 2467 fps | 97.5% |
| ReloadSwiss RS 70 | 49.5 gr | 80% | 34,200 psi | 53% | 2470 fps | 96.7% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 37,840 psi | 58% | 2612 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 54,926 psi | 85% | 2667 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 48,602 psi | 75% | 2602 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,959 psi | 65% | 2536 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 46,746 psi | 72% | 2635 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 90% | 40,640 psi | 63% | 2572 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 39,595 psi | 61% | 2470 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,363 psi | 59% | 2448 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,460 psi | 81% | 2677 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,833 psi | 72% | 2592 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,564 psi | 56% | 2428 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,439 psi | 67% | 2595 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,069 psi | 82% | 2703 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,908 psi | 78% | 2677 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,996 psi | 80% | 2582 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,787 psi | 67% | 2457 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,724 psi | 58% | 2398 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,263 psi | 62% | 2569 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 51,576 psi | 79% | 2582 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,069 psi | 82% | 2694 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,467 psi | 65% | 2539 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 51,039 psi | 79% | 2677 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 31,618 psi | 49% | 2402 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 38,609 psi | 59% | 2503 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 52,591 psi | 81% | 2569 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,733 psi | 75% | 2566 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,950 psi | 75% | 2579 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,495 psi | 62% | 2470 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,709 psi | 56% | 2448 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 94% | 40,567 psi | 62% | 2533 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 54,969 psi | 85% | 2700 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 47,442 psi | 73% | 2579 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,100 psi | 56% | 2448 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 80% | 27,253 psi | 42% | 2287 fps | 95.3% |
| Vihtavuori N560 | <<locked>> | 96% | 47,718 psi | 73% | 2762 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,897 psi | 55% | 2421 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 37,405 psi | 58% | 2497 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,135 psi | 39% | 2297 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,836 psi | 78% | 2684 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,584 psi | 67% | 2595 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 119 powders for .280 Ackley Improved loaded with the .284 | 160gr | CutEdge MTH. Alliant Reloder-26 delivers the highest muzzle velocity at 2,936 fps; across all powders the maximum-charge window runs from 1,696 fps to 2,936 fps. Accurate 3100 gives the best case fill at 100 %, and 119 of the 119 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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 Ackley Improved with the .284 | 160gr | CutEdge MTH they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, Baschieri & Pellagri 109 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.