Load Specifications
Bullet:.284 | 168gr | Barnes LRX BT
Bullet Manufacturer:Barnes
Bullet Weight:168 gr
Bullet Diameter:0.284"
Bullet Length:<<locked>>
Caliber:.280 Ackley Improved load data
Case Length (l3):2.54"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:74 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:65,000 psi
Recommended Twist Rate:1:8.5
Load data in caliber .280 Ackley Improved with .284 | 168gr | Barnes LRX BT bullet and 113 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-17.
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% | 56,043 psi | 86% | 2592 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,986 psi | 89% | 2671 fps | 99.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,894 psi | 78% | 2654 fps | 99.6% |
| Accurate 4064 | <<locked>> | 86% | 56,478 psi | 87% | 2644 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 57,392 psi | 88% | 2756 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 53,301 psi | 82% | 2792 fps | 96.2% |
| ADI AR 2206H | <<locked>> | 82% | 55,941 psi | 86% | 2677 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,145 psi | 88% | 2684 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 58,494 psi | 90% | 2802 fps | 99% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,591 psi | 81% | 2743 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 58,218 psi | 90% | 2671 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,623 psi | 87% | 2805 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,653 psi | 89% | 2703 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 58,030 psi | 89% | 2726 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 58,247 psi | 90% | 2808 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,883 psi | 86% | 2782 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,522 psi | 88% | 2785 fps | 98.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,198 psi | 79% | 2740 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,066 psi | 74% | 2674 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,800 psi | 64% | 2602 fps | 99% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,114 psi | 85% | 2858 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,985 psi | 86% | 2700 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,644 psi | 72% | 2661 fps | 97.1% |
| Bofors RP3 | <<locked>> | 88% | 58,726 psi | 90% | 2720 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,198 psi | 79% | 2740 fps | 98.2% |
| Bofors RP7 | <<locked>> | 92% | 57,914 psi | 89% | 2710 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 82% | 58,233 psi | 90% | 2703 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 55,535 psi | 85% | 2690 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 56,028 psi | 86% | 2756 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 90% | 56,072 psi | 86% | 2720 fps | 98.9% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,275 psi | 87% | 2746 fps | 97% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 55,274 psi | 85% | 2730 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 82% | 56,565 psi | 87% | 2684 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 58,378 psi | 90% | 2730 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,869 psi | 87% | 2723 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 40,886 psi | 63% | 2621 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 92% | 56,507 psi | 87% | 2802 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,332 psi | 56% | 1640 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,522 psi | 88% | 2684 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,159 psi | 88% | 2657 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,550 psi | 87% | 2664 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,970 psi | 86% | 2654 fps | 99.5% |
| IMR 4350 | <<locked>> | 94% | 55,347 psi | 85% | 2690 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,130 psi | 86% | 2684 fps | 99.5% |
| IMR 4831 | <<locked>> | 96% | 57,870 psi | 89% | 2746 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,941 psi | 86% | 2703 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 57,827 psi | 89% | 2730 fps | 97.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 49,893 psi | 77% | 2713 fps | 96.5% |
| IMR 8208 XBR | <<locked>> | 82% | 58,218 psi | 90% | 2671 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,217 psi | 86% | 2651 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 58,218 psi | 90% | 2651 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,565 psi | 87% | 2657 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,217 psi | 86% | 2684 fps | 99.9% |
| Lovex S070 | <<locked>> | 94% | 57,261 psi | 88% | 2720 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,235 psi | 65% | 2513 fps | 98.4% |
| Norma 201 | <<locked>> | 84% | 58,030 psi | 89% | 2667 fps | 100% |
| Norma 202 | <<locked>> | 84% | 58,740 psi | 90% | 2661 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,246 psi | 88% | 2710 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,130 psi | 86% | 2743 fps | 98.5% |
| Norma MRPᴾ | <<locked>> | 100% | 54,302 psi | 84% | 2822 fps | 99.5% |
| Norma URP | <<locked>> | 94% | 56,014 psi | 86% | 2740 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 58,508 psi | 90% | 2743 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 50,009 psi | 77% | 2726 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 96% | 58,798 psi | 90% | 2799 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,179 psi | 68% | 2602 fps | 97.2% |
| Ramshot TAC | <<locked>> | 82% | 58,392 psi | 90% | 2707 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 82% | 58,378 psi | 90% | 2717 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,782 psi | 57% | 1677 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,288 psi | 85% | 2674 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,579 psi | 86% | 2743 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,332 psi | 85% | 2772 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,246 psi | 88% | 2779 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,883 psi | 86% | 2808 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,698 psi | 63% | 2618 fps | 97.2% |
| Rottweil R 901 | <<locked>> | 82% | 58,624 psi | 90% | 2638 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 58,624 psi | 90% | 2667 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 58,552 psi | 90% | 2713 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,797 psi | 87% | 2723 fps | 97.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,782 psi | 87% | 2776 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 92% | 57,914 psi | 89% | 2710 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,217 psi | 86% | 2684 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,217 psi | 86% | 2651 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,565 psi | 87% | 2657 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,261 psi | 88% | 2720 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,623 psi | 87% | 2726 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,014 psi | 88% | 2684 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,870 psi | 89% | 2700 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,550 psi | 85% | 2556 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,536 psi | 87% | 2559 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,912 psi | 86% | 2638 fps | 99.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,275 psi | 87% | 2772 fps | 98.8% |
| Somchem S335 | <<locked>> | 84% | 58,595 psi | 90% | 2595 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,942 psi | 88% | 2671 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 58,653 psi | 90% | 2710 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 58,552 psi | 90% | 2717 fps | 97.3% |
| Somchem S365 | <<locked>> | 96% | 55,100 psi | 85% | 2740 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,580 psi | 89% | 2756 fps | 99.4% |
| Vihtavuori N133 | <<locked>> | 82% | 56,130 psi | 86% | 2536 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,347 psi | 85% | 2579 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,927 psi | 86% | 2598 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,362 psi | 87% | 2638 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 58,494 psi | 90% | 2736 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,458 psi | 76% | 2621 fps | 98.1% |
| Vihtavuori N530 | <<locked>> | 82% | 58,755 psi | 90% | 2671 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 57,624 psi | 89% | 2644 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,232 psi | 88% | 2740 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,998 psi | 83% | 2749 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,766 psi | 84% | 2812 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 58,320 psi | 90% | 2707 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,347 psi | 87% | 2762 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,308 psi | 67% | 2726 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 57,986 psi | 89% | 2707 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,925 psi | 83% | 2697 fps | 98.3% |
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% | 49,110 psi | 76% | 2503 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,543 psi | 73% | 2516 fps | 97.9% |
| Accurate 3100 | <<locked>> | 86% | 31,343 psi | 48% | 2287 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 46,572 psi | 72% | 2510 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,244 psi | 54% | 2385 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 98% | 49,574 psi | 76% | 2730 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 52,562 psi | 81% | 2631 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,454 psi | 68% | 2490 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 42,221 psi | 65% | 2533 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 96% | 45,876 psi | 71% | 2628 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,737 psi | 84% | 2625 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,037 psi | 75% | 2694 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,730 psi | 69% | 2513 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,037 psi | 74% | 2579 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,809 psi | 54% | 2398 fps | 98.3% |
| Alliant Reloder-17 | 46.9 gr | 80% | 39,146 psi | 60% | 2513 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 41,843 psi | 64% | 2526 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 38,957 psi | 60% | 2513 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,150 psi | 39% | 2165 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,445 psi | 50% | 2382 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 84% | 30,632 psi | 47% | 2379 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,344 psi | 81% | 2648 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 40,973 psi | 63% | 2552 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 44,730 psi | 69% | 2520 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 38,957 psi | 60% | 2513 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 39,595 psi | 61% | 2402 fps | 96.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 54,418 psi | 84% | 2654 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 45,281 psi | 70% | 2533 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 37,362 psi | 57% | 2431 fps | 96.2% |
| Hodgdon H4350 | <<locked>> | 80% | 40,408 psi | 62% | 2451 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 96% | 49,037 psi | 75% | 2631 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 48,167 psi | 74% | 2618 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 53,127 psi | 82% | 2638 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,213 psi | 50% | 2300 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,748 psi | 77% | 2625 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 38,363 psi | 59% | 2562 fps | 95% |
| Hodgdon Superformance | 49.6 gr | 80% | 36,289 psi | 56% | 2438 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,050 psi | 42% | 1463 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,720 psi | 78% | 2589 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,476 psi | 82% | 2608 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,731 psi | 72% | 2520 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,182 psi | 76% | 2552 fps | 98.8% |
| IMR 4350 | <<locked>> | 82% | 37,782 psi | 58% | 2388 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,162 psi | 63% | 2434 fps | 97.1% |
| IMR 4831 | <<locked>> | 80% | 34,069 psi | 52% | 2346 fps | 97.9% |
| IMR 4895 | <<locked>> | 80% | 49,269 psi | 76% | 2605 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 47,979 psi | 74% | 2579 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 98% | 46,731 psi | 72% | 2657 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 54,737 psi | 84% | 2625 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,417 psi | 81% | 2602 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,474 psi | 79% | 2556 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,789 psi | 72% | 2516 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,580 psi | 59% | 2388 fps | 97.8% |
| Lovex S070 | <<locked>> | 80% | 36,825 psi | 57% | 2369 fps | 96.2% |
| Lovex S071 | <<locked>> | 92% | 32,561 psi | 50% | 2313 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 51,155 psi | 79% | 2575 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,764 psi | 80% | 2569 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,384 psi | 73% | 2566 fps | 100% |
| Norma 204 | <<locked>> | 86% | 42,772 psi | 66% | 2523 fps | 95.8% |
| Norma MRP | <<locked>> | 88% | 35,679 psi | 55% | 2470 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 35,375 psi | 54% | 2385 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 80% | 47,572 psi | 73% | 2589 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 46,398 psi | 71% | 2661 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 34,185 psi | 53% | 2369 fps | 96% |
| Ramshot Magnum | <<locked>> | 96% | 38,305 psi | 59% | 2487 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 54,650 psi | 84% | 2654 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 54,607 psi | 84% | 2664 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,514 psi | 42% | 1499 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,629 psi | 70% | 2523 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,721 psi | 80% | 2687 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,713 psi | 64% | 2566 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,983 psi | 54% | 2402 fps | 97.8% |
| ReloadSwiss RS 70 | 47.7 gr | 80% | 34,287 psi | 53% | 2411 fps | 97.2% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 37,884 psi | 58% | 2552 fps | 96.1% |
| Rottweil R 901 | <<locked>> | 80% | 55,085 psi | 85% | 2592 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 48,791 psi | 75% | 2533 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,235 psi | 65% | 2474 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 46,601 psi | 72% | 2562 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 90% | 40,712 psi | 63% | 2507 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 39,595 psi | 61% | 2402 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,580 psi | 59% | 2388 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,417 psi | 81% | 2602 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,789 psi | 72% | 2516 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,825 psi | 57% | 2369 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,424 psi | 67% | 2523 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,229 psi | 82% | 2631 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,879 psi | 78% | 2602 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,112 psi | 80% | 2510 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,888 psi | 68% | 2388 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,811 psi | 58% | 2336 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,335 psi | 62% | 2503 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 51,880 psi | 80% | 2510 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,200 psi | 82% | 2621 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,714 psi | 66% | 2474 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 47,776 psi | 74% | 2556 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 31,705 psi | 49% | 2343 fps | 99.6% |
| Somchem S385 | <<locked>> | 86% | 35,998 psi | 55% | 2382 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 52,707 psi | 81% | 2493 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,863 psi | 75% | 2493 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,284 psi | 76% | 2513 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,799 psi | 63% | 2408 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,811 psi | 57% | 2385 fps | 98.4% |
| Vihtavuori N165 | <<locked>> | 92% | 38,014 psi | 58% | 2418 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 54,810 psi | 84% | 2621 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 47,355 psi | 73% | 2503 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,056 psi | 55% | 2382 fps | 98% |
| Vihtavuori N555 | <<locked>> | 80% | 27,456 psi | 42% | 2234 fps | 95.9% |
| Vihtavuori N560 | <<locked>> | 96% | 47,529 psi | 73% | 2690 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,998 psi | 55% | 2359 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 37,579 psi | 58% | 2434 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 82% | 23,569 psi | 36% | 2182 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,879 psi | 78% | 2608 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 40,640 psi | 63% | 2474 fps | 95.3% |
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 | 168gr | Barnes LRX BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,858 fps; across all powders the maximum-charge window runs from 1,640 fps to 2,858 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 168.0 gr projectile in 0.284" calls for a 1:8.5 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .280 Ackley Improved with the .284 | 168gr | Barnes LRX BT 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.