Load Specifications
Bullet:.284 | 160gr | Barnes TSX FB
Bullet Manufacturer:Barnes
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:1:10.0
Load data in caliber .280 Ackley Improved with .284 | 160gr | Barnes TSX FB bullet and 110 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% | 56,376 psi | 87% | 2674 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 58,334 psi | 90% | 2753 fps | 99.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,517 psi | 79% | 2733 fps | 99.5% |
| Accurate 4064 | <<locked>> | 86% | 56,637 psi | 87% | 2726 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 57,856 psi | 89% | 2841 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 53,853 psi | 83% | 2874 fps | 96% |
| ADI AR 2206H | <<locked>> | 82% | 56,246 psi | 87% | 2762 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,522 psi | 88% | 2766 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,230 psi | 85% | 2831 fps | 98.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,779 psi | 81% | 2822 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 82% | 58,523 psi | 90% | 2756 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,724 psi | 87% | 2887 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,957 psi | 89% | 2785 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 58,378 psi | 90% | 2812 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 58,740 psi | 90% | 2894 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,304 psi | 87% | 2867 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 58,175 psi | 89% | 2874 fps | 98.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,430 psi | 79% | 2815 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,472 psi | 75% | 2753 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,308 psi | 65% | 2677 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,941 psi | 86% | 2946 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,159 psi | 86% | 2779 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,282 psi | 73% | 2746 fps | 97% |
| Bofors RP3 | <<locked>> | 86% | 55,332 psi | 85% | 2756 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,430 psi | 79% | 2815 fps | 98% |
| Bofors RP7 | <<locked>> | 92% | 58,247 psi | 90% | 2792 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 82% | 58,508 psi | 90% | 2785 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 55,724 psi | 86% | 2772 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 56,391 psi | 87% | 2838 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 90% | 56,333 psi | 87% | 2802 fps | 98.7% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,768 psi | 87% | 2828 fps | 96.9% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 55,477 psi | 85% | 2808 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 82% | 56,869 psi | 87% | 2769 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,158 psi | 85% | 2766 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,072 psi | 88% | 2805 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 57,000 psi | 88% | 2884 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,187 psi | 56% | 1696 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 58,059 psi | 89% | 2769 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,363 psi | 88% | 2740 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,768 psi | 87% | 2746 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,057 psi | 86% | 2733 fps | 99.4% |
| IMR 4350 | <<locked>> | 94% | 55,767 psi | 86% | 2776 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,521 psi | 87% | 2769 fps | 99.4% |
| IMR 4831 | <<locked>> | 96% | 58,175 psi | 89% | 2828 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 56,115 psi | 86% | 2785 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 58,436 psi | 90% | 2818 fps | 97.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,111 psi | 77% | 2789 fps | 96.2% |
| IMR 8208 XBR | <<locked>> | 82% | 58,523 psi | 90% | 2756 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,347 psi | 87% | 2730 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 58,537 psi | 90% | 2733 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,753 psi | 87% | 2740 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,231 psi | 87% | 2759 fps | 99.9% |
| Lovex S070 | <<locked>> | 94% | 57,725 psi | 89% | 2805 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,569 psi | 65% | 2585 fps | 98.2% |
| Norma 201 | <<locked>> | 84% | 58,334 psi | 90% | 2749 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,564 psi | 85% | 2700 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,595 psi | 89% | 2795 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,652 psi | 87% | 2828 fps | 98.4% |
| Norma MRPᴾ | <<locked>> | 100% | 54,607 psi | 84% | 2900 fps | 99.4% |
| Norma URP | <<locked>> | 94% | 56,536 psi | 87% | 2825 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 58,726 psi | 90% | 2825 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 50,328 psi | 77% | 2805 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 94% | 55,376 psi | 85% | 2828 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,657 psi | 69% | 2680 fps | 97.1% |
| Ramshot TAC | <<locked>> | 82% | 58,523 psi | 90% | 2785 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 82% | 58,595 psi | 90% | 2795 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,854 psi | 57% | 1736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,651 psi | 86% | 2756 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,724 psi | 86% | 2825 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,927 psi | 86% | 2861 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,711 psi | 89% | 2864 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,492 psi | 87% | 2897 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,973 psi | 63% | 2690 fps | 96.9% |
| Rottweil R 902 | <<locked>> | 84% | 55,419 psi | 85% | 2703 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,172 psi | 85% | 2749 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 57,014 psi | 88% | 2802 fps | 97.6% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 57,174 psi | 88% | 2858 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 92% | 58,247 psi | 90% | 2792 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,231 psi | 87% | 2759 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,347 psi | 87% | 2730 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,753 psi | 87% | 2740 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,725 psi | 89% | 2805 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,246 psi | 88% | 2812 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,508 psi | 88% | 2769 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 58,131 psi | 89% | 2782 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,883 psi | 86% | 2635 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,695 psi | 87% | 2638 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,144 psi | 86% | 2717 fps | 99.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,681 psi | 87% | 2851 fps | 98.7% |
| Somchem S335 | <<locked>> | 82% | 55,245 psi | 85% | 2631 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,116 psi | 88% | 2753 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,405 psi | 85% | 2746 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 55,100 psi | 85% | 2743 fps | 96.5% |
| Somchem S365 | <<locked>> | 96% | 55,448 psi | 85% | 2822 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,798 psi | 89% | 2835 fps | 99.3% |
| Vihtavuori N133 | <<locked>> | 82% | 56,420 psi | 87% | 2618 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,869 psi | 86% | 2664 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,130 psi | 86% | 2680 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,782 psi | 87% | 2720 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,056 psi | 85% | 2769 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,024 psi | 77% | 2703 fps | 98% |
| Vihtavuori N540 | <<locked>> | 86% | 57,812 psi | 89% | 2723 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,812 psi | 89% | 2825 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,143 psi | 83% | 2825 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 55,042 psi | 85% | 2890 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,737 psi | 84% | 2740 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,739 psi | 87% | 2844 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,671 psi | 67% | 2805 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 58,479 psi | 90% | 2792 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,360 psi | 84% | 2776 fps | 98.2% |
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% | 49,385 psi | 76% | 2582 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,674 psi | 73% | 2589 fps | 97.7% |
| Accurate 3100 | <<locked>> | 88% | 33,953 psi | 52% | 2408 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 46,833 psi | 72% | 2589 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,389 psi | 54% | 2454 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 98% | 49,893 psi | 77% | 2808 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 52,692 psi | 81% | 2710 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,701 psi | 69% | 2566 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 42,554 psi | 65% | 2608 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 96% | 46,253 psi | 71% | 2703 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,868 psi | 84% | 2707 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,139 psi | 76% | 2772 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,933 psi | 69% | 2589 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,153 psi | 74% | 2657 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,027 psi | 54% | 2470 fps | 98.1% |
| Alliant Reloder-17 | 49.1 gr | 80% | 39,537 psi | 61% | 2589 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 41,872 psi | 64% | 2595 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,090 psi | 65% | 2644 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,295 psi | 39% | 2224 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,634 psi | 50% | 2448 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 84% | 30,864 psi | 47% | 2444 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,649 psi | 81% | 2730 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 41,263 psi | 63% | 2628 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 45,078 psi | 69% | 2598 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,090 psi | 65% | 2644 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 39,784 psi | 61% | 2474 fps | 95.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 54,505 psi | 84% | 2733 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 45,585 psi | 70% | 2608 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 37,608 psi | 58% | 2503 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 80% | 40,727 psi | 63% | 2526 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 96% | 49,414 psi | 76% | 2710 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 48,573 psi | 75% | 2697 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 53,272 psi | 82% | 2717 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,430 psi | 50% | 2365 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,966 psi | 77% | 2703 fps | 100% |
| Hodgdon Superformance | <<locked>> | 80% | 36,593 psi | 56% | 2510 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,064 psi | 42% | 1516 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,879 psi | 78% | 2667 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,838 psi | 83% | 2694 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,978 psi | 72% | 2598 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,501 psi | 76% | 2631 fps | 98.6% |
| IMR 4350 | <<locked>> | 82% | 38,029 psi | 59% | 2457 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,307 psi | 64% | 2507 fps | 96.8% |
| IMR 4831 | <<locked>> | 80% | 34,229 psi | 53% | 2411 fps | 97.6% |
| IMR 4895 | <<locked>> | 80% | 49,429 psi | 76% | 2684 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 48,312 psi | 74% | 2654 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 98% | 47,065 psi | 72% | 2733 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 54,868 psi | 84% | 2707 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,707 psi | 81% | 2680 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,706 psi | 80% | 2638 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,065 psi | 72% | 2595 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,783 psi | 60% | 2457 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 36,970 psi | 57% | 2438 fps | 95.9% |
| Lovex S071 | <<locked>> | 92% | 32,750 psi | 50% | 2382 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 51,401 psi | 79% | 2654 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,982 psi | 80% | 2651 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,514 psi | 73% | 2644 fps | 100% |
| Norma 204 | <<locked>> | 86% | 42,844 psi | 66% | 2595 fps | 95.5% |
| Norma MRP | <<locked>> | 88% | 35,897 psi | 55% | 2539 fps | 95% |
| Norma URP | <<locked>> | 80% | 35,520 psi | 55% | 2454 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 80% | 47,659 psi | 73% | 2664 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 46,833 psi | 72% | 2740 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 34,374 psi | 53% | 2438 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 96% | 38,667 psi | 59% | 2559 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 54,926 psi | 85% | 2736 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 54,940 psi | 85% | 2746 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,514 psi | 42% | 1552 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,832 psi | 71% | 2598 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,996 psi | 80% | 2769 fps | 100% |
| ReloadSwiss RS 60 | 49.1 gr | 80% | 42,119 psi | 65% | 2644 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,172 psi | 54% | 2470 fps | 97.5% |
| ReloadSwiss RS 70 | 49.8 gr | 80% | 34,389 psi | 53% | 2477 fps | 96.8% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,290 psi | 59% | 2625 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 48,849 psi | 75% | 2608 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,453 psi | 65% | 2549 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 47,123 psi | 72% | 2644 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 90% | 40,814 psi | 63% | 2579 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 39,784 psi | 61% | 2474 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,783 psi | 60% | 2457 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,707 psi | 81% | 2680 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,065 psi | 72% | 2595 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,970 psi | 57% | 2438 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,656 psi | 67% | 2602 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,548 psi | 82% | 2713 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,111 psi | 79% | 2680 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,489 psi | 81% | 2592 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,251 psi | 68% | 2467 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,913 psi | 58% | 2402 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,422 psi | 62% | 2572 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 52,069 psi | 80% | 2589 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,519 psi | 82% | 2703 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,946 psi | 66% | 2549 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 51,634 psi | 79% | 2690 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 31,836 psi | 49% | 2408 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 38,754 psi | 60% | 2507 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 53,098 psi | 82% | 2575 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,269 psi | 76% | 2575 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,487 psi | 76% | 2589 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,944 psi | 63% | 2480 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,927 psi | 57% | 2454 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 94% | 40,915 psi | 63% | 2543 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 47,630 psi | 73% | 2582 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,303 psi | 56% | 2454 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 27,644 psi | 43% | 2297 fps | 95.6% |
| Vihtavuori N560 | <<locked>> | 96% | 48,066 psi | 74% | 2772 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,230 psi | 56% | 2431 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 37,826 psi | 58% | 2507 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,251 psi | 39% | 2300 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,010 psi | 78% | 2687 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 40,973 psi | 63% | 2546 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 117 powders for .280 Ackley Improved loaded with the .284 | 160gr | Barnes TSX FB. Alliant Reloder-26 delivers the highest muzzle velocity at 2,946 fps; across all powders the maximum-charge window runs from 1,696 fps to 2,946 fps. Accurate 3100 gives the best case fill at 100 %, and 117 of the 117 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 160.0 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 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .280 Ackley Improved with the .284 | 160gr | Barnes TSX FB 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.