Load Specifications
Bullet Manufacturer:Reichenberg
Bullet Weight:154 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:1:10.0
Load data in caliber .280 Ackley Improved with .284 | 154gr | Reichenberg HDB Universal bullet and 106 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 70 and Alliant Reloder-26.
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% | 57,711 psi | 89% | 2743 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,405 psi | 85% | 2762 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,823 psi | 81% | 2805 fps | 99.5% |
| Accurate 4064 | <<locked>> | 86% | 58,117 psi | 89% | 2799 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,114 psi | 85% | 2854 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 54,592 psi | 84% | 2936 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 82% | 56,942 psi | 88% | 2825 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,957 psi | 89% | 2828 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,173 psi | 86% | 2897 fps | 98.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,621 psi | 82% | 2884 fps | 96.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 57,725 psi | 89% | 2959 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 56,130 psi | 86% | 2894 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,216 psi | 85% | 2802 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,637 psi | 86% | 2825 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,753 psi | 86% | 2910 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 57,116 psi | 88% | 2933 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,332 psi | 85% | 2884 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,344 psi | 81% | 2884 fps | 97.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,588 psi | 76% | 2822 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,062 psi | 66% | 2740 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,087 psi | 88% | 3018 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,826 psi | 87% | 2844 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,993 psi | 74% | 2805 fps | 96.8% |
| Bofors RP3 | <<locked>> | 86% | 56,057 psi | 86% | 2818 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,344 psi | 81% | 2884 fps | 97.9% |
| Bofors RP7 | <<locked>> | 90% | 55,608 psi | 86% | 2805 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 86% | 56,608 psi | 87% | 2838 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 57,246 psi | 88% | 2904 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 90% | 57,203 psi | 88% | 2867 fps | 98.7% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 57,551 psi | 89% | 2890 fps | 96.7% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 56,289 psi | 87% | 2871 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 82% | 57,595 psi | 89% | 2835 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,072 psi | 86% | 2831 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,841 psi | 89% | 2871 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 57,812 psi | 89% | 2946 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,434 psi | 56% | 1739 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 58,552 psi | 90% | 2831 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 58,262 psi | 90% | 2805 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 57,667 psi | 89% | 2815 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,826 psi | 87% | 2799 fps | 99.3% |
| IMR 4350 | <<locked>> | 94% | 56,550 psi | 87% | 2838 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,145 psi | 88% | 2831 fps | 99.3% |
| IMR 4831 | <<locked>> | 94% | 55,448 psi | 85% | 2844 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,087 psi | 88% | 2854 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 55,651 psi | 86% | 2825 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,995 psi | 78% | 2854 fps | 96.1% |
| Lovex D073.6 | <<locked>> | 82% | 57,479 psi | 88% | 2799 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,825 psi | 86% | 2753 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,769 psi | 89% | 2805 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 57,348 psi | 88% | 2828 fps | 99.9% |
| Lovex S070 | <<locked>> | 94% | 58,726 psi | 90% | 2871 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,801 psi | 67% | 2654 fps | 98.2% |
| Norma 201 | <<locked>> | 82% | 55,564 psi | 85% | 2766 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,362 psi | 87% | 2762 fps | 100% |
| Norma 203B | <<locked>> | 86% | 58,479 psi | 90% | 2861 fps | 100% |
| Norma 204 | <<locked>> | 94% | 57,319 psi | 88% | 2890 fps | 98.3% |
| Norma MRPᴾ | <<locked>> | 100% | 55,782 psi | 86% | 2969 fps | 99.4% |
| Norma URP | <<locked>> | 94% | 57,450 psi | 88% | 2890 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 55,724 psi | 86% | 2838 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,445 psi | 79% | 2871 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 94% | 56,043 psi | 86% | 2890 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,730 psi | 70% | 2746 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,115 psi | 57% | 1781 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,666 psi | 87% | 2825 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,666 psi | 87% | 2894 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,811 psi | 87% | 2927 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,824 psi | 84% | 2877 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 57,058 psi | 88% | 2959 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,003 psi | 65% | 2756 fps | 96.9% |
| Rottweil R 902 | <<locked>> | 84% | 56,362 psi | 87% | 2769 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,217 psi | 86% | 2815 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 57,638 psi | 89% | 2864 fps | 97.5% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 58,146 psi | 89% | 2923 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 90% | 55,608 psi | 86% | 2805 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 57,348 psi | 88% | 2828 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 57,479 psi | 88% | 2799 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,769 psi | 89% | 2805 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 58,726 psi | 90% | 2871 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,870 psi | 89% | 2874 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 58,378 psi | 90% | 2835 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,376 psi | 85% | 2799 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,420 psi | 87% | 2697 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 57,305 psi | 88% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,116 psi | 88% | 2782 fps | 99.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,638 psi | 89% | 2920 fps | 98.6% |
| Somchem S335 | <<locked>> | 82% | 56,043 psi | 86% | 2694 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,870 psi | 89% | 2815 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,086 psi | 86% | 2808 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 55,912 psi | 86% | 2805 fps | 96.4% |
| Somchem S365 | <<locked>> | 96% | 56,724 psi | 87% | 2894 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,114 psi | 85% | 2844 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 82% | 56,884 psi | 88% | 2677 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,782 psi | 87% | 2730 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,797 psi | 87% | 2743 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 57,595 psi | 89% | 2785 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,999 psi | 86% | 2835 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,966 psi | 78% | 2766 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 86% | 58,653 psi | 90% | 2789 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 58,639 psi | 90% | 2890 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,434 psi | 85% | 2897 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 56,173 psi | 86% | 2959 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,622 psi | 86% | 2802 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 57,580 psi | 89% | 2910 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,628 psi | 69% | 2874 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,593 psi | 86% | 2805 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,230 psi | 85% | 2838 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% | 50,908 psi | 78% | 2651 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,631 psi | 75% | 2654 fps | 97.6% |
| Accurate 3100 | <<locked>> | 88% | 35,099 psi | 54% | 2474 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 48,225 psi | 74% | 2657 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,521 psi | 56% | 2520 fps | 98% |
| Accurate MAGPRO | <<locked>> | 98% | 51,039 psi | 79% | 2877 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 53,476 psi | 82% | 2776 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,498 psi | 70% | 2631 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 43,221 psi | 66% | 2667 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 98% | 50,154 psi | 77% | 2825 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,951 psi | 77% | 2838 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,337 psi | 67% | 2671 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,861 psi | 71% | 2654 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,023 psi | 75% | 2723 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,636 psi | 55% | 2530 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,248 psi | 62% | 2654 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,830 psi | 66% | 2661 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,960 psi | 66% | 2710 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,223 psi | 40% | 2290 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,605 psi | 52% | 2516 fps | 95.7% |
| Alliant Reloder-26 | 54.1 gr | 84% | 31,966 psi | 49% | 2513 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,142 psi | 82% | 2789 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 42,366 psi | 65% | 2694 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 46,122 psi | 71% | 2664 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,960 psi | 66% | 2710 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 40,669 psi | 63% | 2536 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 46,441 psi | 71% | 2674 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 38,392 psi | 59% | 2562 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 41,408 psi | 64% | 2589 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 96% | 50,372 psi | 77% | 2776 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 52,634 psi | 81% | 2815 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 54,085 psi | 83% | 2782 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,170 psi | 51% | 2428 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,633 psi | 78% | 2766 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 40,118 psi | 62% | 2635 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,079 psi | 42% | 1552 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,561 psi | 79% | 2733 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 54,795 psi | 84% | 2762 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,805 psi | 74% | 2661 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,140 psi | 77% | 2694 fps | 98.5% |
| IMR 4350 | <<locked>> | 82% | 38,725 psi | 60% | 2516 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,061 psi | 65% | 2569 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 35,186 psi | 54% | 2477 fps | 97.7% |
| IMR 4895 | <<locked>> | 80% | 50,270 psi | 77% | 2749 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 49,095 psi | 76% | 2717 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 98% | 47,732 psi | 73% | 2795 fps | 95.2% |
| Lovex D073.6 | <<locked>> | 80% | 53,925 psi | 83% | 2749 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,446 psi | 81% | 2700 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,022 psi | 74% | 2661 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,755 psi | 61% | 2523 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 37,913 psi | 58% | 2500 fps | 95.9% |
| Lovex S071 | <<locked>> | 92% | 33,968 psi | 52% | 2451 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 52,460 psi | 81% | 2720 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,881 psi | 81% | 2717 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,370 psi | 74% | 2710 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,874 psi | 67% | 2661 fps | 95.4% |
| Norma MRP | <<locked>> | 88% | 36,869 psi | 57% | 2605 fps | 95% |
| Norma URP | <<locked>> | 80% | 36,434 psi | 56% | 2516 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 80% | 48,530 psi | 75% | 2730 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 47,776 psi | 74% | 2805 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 35,331 psi | 54% | 2503 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 96% | 39,653 psi | 61% | 2625 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,760 psi | 43% | 1591 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,514 psi | 72% | 2657 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,026 psi | 82% | 2838 fps | 100% |
| ReloadSwiss RS 60 | 50.2 gr | 80% | 42,786 psi | 66% | 2707 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,230 psi | 56% | 2536 fps | 97.6% |
| ReloadSwiss RS 70 | 51 gr | 80% | 35,259 psi | 54% | 2539 fps | 96.8% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,175 psi | 60% | 2687 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 49,922 psi | 77% | 2674 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,526 psi | 67% | 2615 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 47,776 psi | 74% | 2700 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 90% | 41,887 psi | 64% | 2644 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 40,669 psi | 63% | 2536 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,755 psi | 61% | 2523 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,925 psi | 83% | 2749 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 48,022 psi | 74% | 2661 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,913 psi | 58% | 2500 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,643 psi | 69% | 2667 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 54,505 psi | 84% | 2779 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,025 psi | 80% | 2746 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,142 psi | 82% | 2654 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,875 psi | 69% | 2523 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,827 psi | 60% | 2464 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,495 psi | 64% | 2638 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 52,982 psi | 82% | 2654 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 54,085 psi | 83% | 2762 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,903 psi | 68% | 2615 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 52,272 psi | 80% | 2746 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 32,793 psi | 50% | 2474 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 39,885 psi | 61% | 2572 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 53,664 psi | 83% | 2635 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,053 psi | 77% | 2638 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,285 psi | 77% | 2651 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,858 psi | 64% | 2546 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,768 psi | 58% | 2516 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 94% | 41,800 psi | 64% | 2605 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 48,399 psi | 74% | 2644 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,144 psi | 57% | 2516 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 28,718 psi | 44% | 2365 fps | 95.8% |
| Vihtavuori N560 | <<locked>> | 96% | 48,979 psi | 75% | 2835 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,869 psi | 57% | 2487 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 38,580 psi | 59% | 2569 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,208 psi | 40% | 2369 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,924 psi | 80% | 2753 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 41,843 psi | 64% | 2608 fps | 95% |
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 | 154gr | Reichenberg HDB Universal. Alliant Reloder-26 delivers the highest muzzle velocity at 3,018 fps; across all powders the maximum-charge window runs from 1,739 fps to 3,018 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 154.0 gr projectile in 0.284" calls for a 1:10.0 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. ReloadSwiss RS 60, ReloadSwiss RS 70, Alliant Reloder-26 rank at the top here: for .280 Ackley Improved with the .284 | 154gr | Reichenberg HDB Universal 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.