Load Specifications
Bullet Manufacturer:Barnes
Bullet Weight:171 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
Load data in caliber .280 Ackley Improved with .284 | 171gr | Barnes Match Burner BT bullet and 189 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Vihtavuori N560.
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>> | 82% | 57,261 psi | 88% | 2585 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 58,334 psi | 90% | 2671 fps | 99.6% |
| Accurate 2700 | <<locked>> | 82% | 56,362 psi | 87% | 2657 fps | 99.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,565 psi | 87% | 2717 fps | 100% |
| Accurate 3100 | <<locked>> | 98% | 55,477 psi | 85% | 2713 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 57,841 psi | 89% | 2641 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 56,405 psi | 87% | 2635 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 58,755 psi | 90% | 2756 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,406 psi | 88% | 2749 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 56,681 psi | 87% | 2854 fps | 98.7% |
| Accurate MAGPRO | <<locked>> | 98% | 55,027 psi | 85% | 2805 fps | 97.1% |
| Accurate MAGPRO | <<locked>> | 98% | 57,856 psi | 89% | 2861 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 86% | 57,667 psi | 89% | 2677 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 55,927 psi | 86% | 2667 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,912 psi | 86% | 2756 fps | 99% |
| ADI AR 2209 | <<locked>> | 96% | 58,276 psi | 90% | 2802 fps | 99.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,290 psi | 88% | 2808 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 98% | 55,927 psi | 86% | 2805 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 36,709 psi | 56% | 2484 fps | 96.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,595 psi | 59% | 2543 fps | 97.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,188 psi | 88% | 2799 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 58,363 psi | 90% | 2799 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 58,508 psi | 90% | 2697 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,101 psi | 88% | 2690 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,201 psi | 85% | 2674 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,174 psi | 88% | 2710 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,666 psi | 86% | 2759 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 58,146 psi | 89% | 2802 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,101 psi | 88% | 2779 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,840 psi | 86% | 2772 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,288 psi | 85% | 2746 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,566 psi | 89% | 2789 fps | 99.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,420 psi | 87% | 2805 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,303 psi | 85% | 2802 fps | 99.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,113 psi | 82% | 2726 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,970 psi | 86% | 2772 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,195 psi | 71% | 2674 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,414 psi | 74% | 2723 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 98% | 57,522 psi | 88% | 2871 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,420 psi | 87% | 2864 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 58,073 psi | 89% | 2762 fps | 95.9% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,619 psi | 79% | 2730 fps | 98.5% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,143 psi | 83% | 2782 fps | 99% |
| Bofors RP3 | <<locked>> | 84% | 55,898 psi | 86% | 2667 fps | 100% |
| Bofors RP3 | <<locked>> | 84% | 57,870 psi | 89% | 2703 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,237 psi | 68% | 2648 fps | 96.7% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,420 psi | 87% | 2805 fps | 99.2% |
| Bofors RP5 | <<locked>> | 98% | 55,303 psi | 85% | 2802 fps | 99.3% |
| Bofors RP7 | <<locked>> | 90% | 58,668 psi | 90% | 2710 fps | 99.7% |
| Bofors RP7 | <<locked>> | 88% | 56,913 psi | 88% | 2700 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 45,832 psi | 71% | 2615 fps | 96.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,819 psi | 74% | 2667 fps | 97.6% |
| Hodgdon H380 | <<locked>> | 84% | 56,072 psi | 86% | 2687 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 58,160 psi | 89% | 2726 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 56,956 psi | 88% | 2759 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 88% | 55,637 psi | 86% | 2749 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 88% | 56,826 psi | 87% | 2723 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 88% | 58,740 psi | 90% | 2762 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 98% | 57,159 psi | 88% | 2749 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 96% | 55,869 psi | 86% | 2746 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,188 psi | 86% | 2736 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 98% | 58,711 psi | 90% | 2785 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,072 psi | 86% | 2684 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 58,479 psi | 90% | 2726 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,421 psi | 88% | 2713 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,136 psi | 69% | 2710 fps | 98.1% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,543 psi | 73% | 2769 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 90% | 57,493 psi | 88% | 2802 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 55,767 psi | 86% | 2789 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,593 psi | 56% | 1644 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,796 psi | 57% | 1663 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,841 psi | 89% | 2674 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,000 psi | 88% | 2657 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,361 psi | 85% | 2648 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,101 psi | 86% | 2651 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,812 psi | 89% | 2690 fps | 99.9% |
| IMR 4350 | <<locked>> | 92% | 56,028 psi | 86% | 2690 fps | 99.5% |
| IMR 4350 | <<locked>> | 92% | 58,349 psi | 90% | 2740 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,753 psi | 87% | 2687 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 58,610 psi | 90% | 2726 fps | 99.9% |
| IMR 4831 | <<locked>> | 92% | 55,492 psi | 85% | 2700 fps | 100% |
| IMR 4831 | <<locked>> | 92% | 57,783 psi | 89% | 2743 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,666 psi | 87% | 2697 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 58,682 psi | 90% | 2736 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 58,581 psi | 90% | 2736 fps | 98.1% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,348 psi | 88% | 2733 fps | 98.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,621 psi | 84% | 2782 fps | 98% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,058 psi | 88% | 2835 fps | 98.6% |
| Lovex S060 | <<locked>> | 82% | 58,436 psi | 90% | 2641 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 57,203 psi | 88% | 2651 fps | 100% |
| Lovex S062 | <<locked>> | 82% | 55,680 psi | 86% | 2641 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,826 psi | 87% | 2680 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 58,740 psi | 90% | 2717 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 58,436 psi | 90% | 2726 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 56,739 psi | 87% | 2713 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,050 psi | 72% | 2579 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,400 psi | 76% | 2625 fps | 99.7% |
| Norma 201 | <<locked>> | 82% | 58,450 psi | 90% | 2657 fps | 100% |
| Norma 203B | <<locked>> | 84% | 58,160 psi | 89% | 2707 fps | 100% |
| Norma 203B | <<locked>> | 82% | 56,463 psi | 87% | 2697 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,043 psi | 88% | 2749 fps | 99% |
| Norma 204 | <<locked>> | 90% | 55,405 psi | 85% | 2736 fps | 99% |
| Norma MRP | <<locked>> | 98% | 55,796 psi | 86% | 2825 fps | 99.8% |
| Norma MRP | <<locked>> | 98% | 58,813 psi | 90% | 2877 fps | 100% |
| Norma URP | <<locked>> | 92% | 57,406 psi | 88% | 2743 fps | 100% |
| Norma URP | <<locked>> | 90% | 55,796 psi | 86% | 2733 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,129 psi | 85% | 2684 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,203 psi | 88% | 2723 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,187 psi | 85% | 2802 fps | 98.4% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,638 psi | 89% | 2854 fps | 99% |
| Ramshot Hunter | <<locked>> | 92% | 56,014 psi | 86% | 2746 fps | 100% |
| Ramshot Hunter | <<locked>> | 92% | 58,436 psi | 90% | 2792 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,255 psi | 76% | 2684 fps | 98.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,721 psi | 80% | 2733 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,362 psi | 57% | 1686 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,550 psi | 58% | 1703 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,854 psi | 86% | 2671 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,769 psi | 89% | 2710 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,652 psi | 87% | 2769 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,216 psi | 85% | 2759 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 58,682 psi | 90% | 2782 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,464 psi | 88% | 2776 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,174 psi | 88% | 2815 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,593 psi | 86% | 2802 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,208 psi | 70% | 2707 fps | 99% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,311 psi | 73% | 2762 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 82% | 55,869 psi | 86% | 2615 fps | 100% |
| Rottweil R 902 | <<locked>> | 82% | 57,638 psi | 89% | 2651 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,086 psi | 86% | 2664 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 58,044 psi | 89% | 2700 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,522 psi | 88% | 2726 fps | 98.4% |
| Rottweil R 904 | <<locked>> | 94% | 56,159 psi | 86% | 2720 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 98% | 58,175 psi | 89% | 2782 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 96% | 56,797 psi | 87% | 2776 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 90% | 58,668 psi | 90% | 2710 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 88% | 56,913 psi | 88% | 2700 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,826 psi | 87% | 2680 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 90% | 58,740 psi | 90% | 2717 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 57,203 psi | 88% | 2651 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 55,680 psi | 86% | 2641 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 58,436 psi | 90% | 2726 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 90% | 56,739 psi | 87% | 2713 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,638 psi | 89% | 2723 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,101 psi | 86% | 2713 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 58,479 psi | 90% | 2694 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,724 psi | 87% | 2546 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 58,610 psi | 90% | 2582 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,536 psi | 87% | 2638 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 58,653 psi | 90% | 2680 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,696 psi | 89% | 2779 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,318 psi | 87% | 2772 fps | 99.3% |
| Somchem S335 | <<locked>> | 82% | 58,755 psi | 90% | 2582 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 55,811 psi | 86% | 2657 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 57,928 psi | 89% | 2697 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,564 psi | 85% | 2671 fps | 97.4% |
| Somchem S361 | <<locked>> | 94% | 57,740 psi | 89% | 2717 fps | 98% |
| Somchem S365 | <<locked>> | 94% | 56,826 psi | 87% | 2743 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 55,869 psi | 86% | 2736 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,143 psi | 85% | 2707 fps | 99.5% |
| Somchem S385 | <<locked>> | 96% | 57,450 psi | 88% | 2753 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 82% | 56,347 psi | 87% | 2572 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 58,305 psi | 90% | 2605 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,434 psi | 87% | 2589 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 58,102 psi | 89% | 2621 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,029 psi | 88% | 2631 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,492 psi | 85% | 2625 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,825 psi | 86% | 2687 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,841 psi | 89% | 2726 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,317 psi | 84% | 2684 fps | 99.2% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,753 psi | 87% | 2730 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 84% | 57,914 psi | 89% | 2631 fps | 100% |
| Vihtavuori N540 | <<locked>> | 82% | 56,434 psi | 87% | 2621 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 58,392 psi | 90% | 2743 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,913 psi | 88% | 2733 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,796 psi | 86% | 2753 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 58,421 psi | 90% | 2795 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,999 psi | 86% | 2818 fps | 97.9% |
| Vihtavuori N560 | <<locked>> | 96% | 54,853 psi | 84% | 2812 fps | 97.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 47,964 psi | 74% | 2677 fps | 96.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,604 psi | 78% | 2730 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,245 psi | 85% | 2654 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,493 psi | 88% | 2694 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,276 psi | 88% | 2762 fps | 99.8% |
| Winchester 760 | <<locked>> | 88% | 55,898 psi | 86% | 2753 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,559 psi | 75% | 2795 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,054 psi | 80% | 2848 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 58,668 psi | 90% | 2700 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,259 psi | 85% | 2703 fps | 98.9% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,725 psi | 89% | 2753 fps | 99.3% |
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% | 53,853 psi | 83% | 2543 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,343 psi | 79% | 2566 fps | 98.9% |
| Accurate 2700 | <<locked>> | 80% | 52,982 psi | 82% | 2605 fps | 99.2% |
| Accurate 3100 | <<locked>> | 82% | 30,937 psi | 48% | 2257 fps | 95.4% |
| Accurate 3100 | <<locked>> | 80% | 30,385 psi | 47% | 2251 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 51,082 psi | 79% | 2556 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 52,982 psi | 82% | 2589 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,204 psi | 60% | 2448 fps | 99.3% |
| Accurate 4350 | <<locked>> | 80% | 41,075 psi | 63% | 2493 fps | 99.6% |
| Accurate High Country | <<locked>> | 88% | 42,917 psi | 66% | 2618 fps | 95.9% |
| Accurate MAGPRO | <<locked>> | 94% | 47,761 psi | 73% | 2687 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 92% | 46,789 psi | 72% | 2680 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 47,776 psi | 74% | 2533 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 49,400 psi | 76% | 2569 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,451 psi | 62% | 2487 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 84% | 39,320 psi | 60% | 2474 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 92% | 43,743 psi | 67% | 2579 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 90% | 42,656 psi | 66% | 2569 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 98% | 34,606 psi | 53% | 2431 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 96% | 33,924 psi | 52% | 2425 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,447 psi | 82% | 2746 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 37,130 psi | 57% | 2425 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,733 psi | 75% | 2559 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,415 psi | 78% | 2595 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,779 psi | 80% | 2621 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,751 psi | 83% | 2664 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,029 psi | 59% | 2457 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,581 psi | 61% | 2500 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,178 psi | 66% | 2569 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,034 psi | 69% | 2612 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 37,710 psi | 58% | 2428 fps | 95% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,204 psi | 60% | 2470 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 37,898 psi | 58% | 2477 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,057 psi | 57% | 2467 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,992 psi | 43% | 2238 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,225 psi | 45% | 2277 fps | 98.5% |
| Alliant Reloder-25 | <<locked>> | 86% | 29,791 psi | 46% | 2297 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,080 psi | 45% | 2287 fps | 95.2% |
| Alliant Reloder-26 | 52.3 gr | 80% | 29,805 psi | 46% | 2339 fps | 96.3% |
| Alliant Reloder-26 | 52.3 gr | 80% | 31,328 psi | 48% | 2392 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 54,563 psi | 84% | 2710 fps | 95.1% |
| Bofors RP15 | <<locked>> | 92% | 39,958 psi | 61% | 2520 fps | 95.8% |
| Bofors RP15 | <<locked>> | 90% | 39,015 psi | 60% | 2510 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 48,979 psi | 75% | 2569 fps | 100% |
| Bofors RP3 | <<locked>> | 80% | 50,966 psi | 78% | 2608 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 41,437 psi | 64% | 2595 fps | 95.8% |
| Bofors RP5 | <<locked>> | 88% | 37,898 psi | 58% | 2477 fps | 95.2% |
| Bofors RP5 | <<locked>> | 86% | 37,057 psi | 57% | 2467 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 43,105 psi | 66% | 2461 fps | 97.6% |
| Bofors RP7 | <<locked>> | 80% | 44,556 psi | 69% | 2500 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 98% | 42,801 psi | 66% | 2556 fps | 95.8% |
| Hodgdon H1000 | <<locked>> | 96% | 41,945 psi | 65% | 2552 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 49,197 psi | 76% | 2582 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 51,053 psi | 79% | 2621 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 40,988 psi | 63% | 2490 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 80% | 42,714 psi | 66% | 2533 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 43,888 psi | 68% | 2510 fps | 97.2% |
| Hodgdon H4350 | <<locked>> | 80% | 45,629 psi | 70% | 2552 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 92% | 46,934 psi | 72% | 2589 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 90% | 45,716 psi | 70% | 2579 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 45,890 psi | 71% | 2569 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 90% | 44,730 psi | 69% | 2562 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,636 psi | 55% | 2356 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,231 psi | 57% | 2395 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,809 psi | 83% | 2664 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,318 psi | 57% | 2533 fps | 95.3% |
| Hodgdon Retumbo | <<locked>> | 92% | 36,724 psi | 56% | 2526 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 39,914 psi | 61% | 2507 fps | 97.1% |
| Hodgdon Superformance | <<locked>> | 80% | 41,597 psi | 64% | 2549 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,456 psi | 42% | 1470 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,543 psi | 42% | 1486 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,520 psi | 84% | 2631 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,270 psi | 77% | 2562 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,967 psi | 80% | 2598 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,663 psi | 81% | 2598 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,085 psi | 83% | 2635 fps | 99.7% |
| IMR 4350 | <<locked>> | 80% | 38,682 psi | 60% | 2395 fps | 96.5% |
| IMR 4350 | <<locked>> | 80% | 40,059 psi | 62% | 2434 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,483 psi | 68% | 2487 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,890 psi | 71% | 2526 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 37,623 psi | 58% | 2402 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 39,146 psi | 60% | 2441 fps | 99.4% |
| IMR 4895 | <<locked>> | 80% | 53,098 psi | 82% | 2648 fps | 100% |
| IMR 4895 | <<locked>> | 80% | 55,158 psi | 85% | 2687 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 45,861 psi | 71% | 2533 fps | 95.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 44,585 psi | 69% | 2523 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 94% | 44,585 psi | 69% | 2608 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 92% | 43,714 psi | 67% | 2605 fps | 95.7% |
| Lovex S060 | <<locked>> | 80% | 54,839 psi | 84% | 2592 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,560 psi | 78% | 2559 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 52,315 psi | 80% | 2595 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,974 psi | 65% | 2441 fps | 98.9% |
| Lovex S065 | <<locked>> | 80% | 43,439 psi | 67% | 2477 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 40,190 psi | 62% | 2425 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 41,611 psi | 64% | 2464 fps | 98.2% |
| Lovex S071 | <<locked>> | 86% | 30,226 psi | 47% | 2241 fps | 95.1% |
| Lovex S071 | <<locked>> | 84% | 29,704 psi | 46% | 2234 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 55,056 psi | 85% | 2612 fps | 100% |
| Norma 203B | <<locked>> | 80% | 51,140 psi | 79% | 2608 fps | 100% |
| Norma 203B | <<locked>> | 80% | 53,113 psi | 82% | 2648 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,857 psi | 63% | 2474 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 39,523 psi | 61% | 2457 fps | 95.6% |
| Norma MRP | 53.3 gr | 84% | 34,548 psi | 53% | 2428 fps | 95.5% |
| Norma MRP | 52 gr | 82% | 33,707 psi | 52% | 2415 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 38,870 psi | 60% | 2441 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 40,437 psi | 62% | 2480 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 80% | 51,721 psi | 80% | 2635 fps | 100% |
| Ramshot Big Game | <<locked>> | 80% | 53,490 psi | 82% | 2671 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 41,481 psi | 64% | 2559 fps | 95% |
| Ramshot Grand | <<locked>> | 90% | 40,451 psi | 62% | 2552 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 37,594 psi | 58% | 2428 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 80% | 39,204 psi | 60% | 2470 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 92% | 36,811 psi | 57% | 2444 fps | 95.5% |
| Ramshot Magnum | <<locked>> | 90% | 36,085 psi | 56% | 2441 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,992 psi | 43% | 1506 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,065 psi | 43% | 1522 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,197 psi | 76% | 2572 fps | 99.4% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,865 psi | 78% | 2612 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,832 psi | 71% | 2615 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,805 psi | 74% | 2654 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,030 psi | 60% | 2470 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,785 psi | 63% | 2510 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,695 psi | 58% | 2477 fps | 98.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,175 psi | 60% | 2520 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,156 psi | 53% | 2451 fps | 95% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 33,489 psi | 52% | 2444 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 52,417 psi | 81% | 2569 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 54,172 psi | 83% | 2605 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,180 psi | 71% | 2520 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,935 psi | 74% | 2559 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 44,730 psi | 69% | 2520 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 86% | 43,598 psi | 67% | 2510 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 86% | 39,146 psi | 60% | 2464 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 84% | 38,348 psi | 59% | 2454 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 43,105 psi | 66% | 2461 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 80% | 44,556 psi | 69% | 2500 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,974 psi | 65% | 2441 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,439 psi | 67% | 2477 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 50,560 psi | 78% | 2559 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 52,315 psi | 80% | 2595 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,190 psi | 62% | 2425 fps | 97.6% |
| Shooters World SW4350 | <<locked>> | 80% | 41,611 psi | 64% | 2464 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,210 psi | 73% | 2572 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,037 psi | 75% | 2612 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,621 psi | 84% | 2641 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,311 psi | 73% | 2425 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,733 psi | 75% | 2454 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,959 psi | 63% | 2388 fps | 97.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,540 psi | 65% | 2428 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 38,783 psi | 60% | 2457 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,000 psi | 58% | 2451 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 55,477 psi | 85% | 2543 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 46,398 psi | 71% | 2520 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 48,066 psi | 74% | 2556 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 45,730 psi | 70% | 2513 fps | 95.1% |
| Somchem S361 | <<locked>> | 86% | 44,353 psi | 68% | 2500 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 35,491 psi | 55% | 2405 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 37,159 psi | 57% | 2444 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 34,998 psi | 54% | 2346 fps | 95.1% |
| Somchem S385 | <<locked>> | 80% | 34,214 psi | 53% | 2336 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 53,026 psi | 82% | 2530 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 54,694 psi | 84% | 2562 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,924 psi | 81% | 2546 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,636 psi | 84% | 2575 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,324 psi | 68% | 2451 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,876 psi | 71% | 2487 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,248 psi | 62% | 2438 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 42,018 psi | 65% | 2480 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 88% | 36,753 psi | 57% | 2379 fps | 95.4% |
| Vihtavuori N165 | <<locked>> | 86% | 35,926 psi | 55% | 2372 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 51,053 psi | 79% | 2543 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 52,837 psi | 81% | 2575 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,610 psi | 61% | 2441 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 80% | 41,292 psi | 64% | 2480 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 31,038 psi | 48% | 2306 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 32,576 psi | 50% | 2349 fps | 98.5% |
| Vihtavuori N560 | 58.4 gr | 92% | 45,832 psi | 71% | 2648 fps | 95.6% |
| Vihtavuori N560 | 57.1 gr | 90% | 44,744 psi | 69% | 2638 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 98% | 44,817 psi | 69% | 2621 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 96% | 44,193 psi | 68% | 2618 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,305 psi | 60% | 2411 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,930 psi | 63% | 2448 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,220 psi | 63% | 2497 fps | 97.8% |
| Winchester 760 | <<locked>> | 80% | 42,946 psi | 66% | 2539 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,656 psi | 38% | 2215 fps | 97% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,773 psi | 40% | 2267 fps | 98.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 55,042 psi | 85% | 2651 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,146 psi | 60% | 2434 fps | 95.4% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,130 psi | 59% | 2425 fps | 95.4% |
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 189 powders for .280 Ackley Improved loaded with the .284 | 171gr | Barnes Match Burner BT. Norma MRP delivers the highest muzzle velocity at 2,877 fps; across all powders the maximum-charge window runs from 1,644 fps to 2,877 fps. Accurate 3100 gives the best case fill at 100 %, and 189 of the 189 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. Accurate 3100, ADI AR 2213, ADI AR 2225 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, Norma MRP, Vihtavuori N560 rank at the top here: for .280 Ackley Improved with the .284 | 171gr | Barnes Match Burner BT 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.