Load Specifications
Bullet Manufacturer:Peregrine
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:1:9.0
Load data in caliber .280 Ackley Improved with .284 | 154gr | Peregrine VLR-5 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-16 and Hodgdon Superformance.
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 2015 | <<locked>> | 82% | 58,421 psi | 90% | 2713 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 57,841 psi | 89% | 2743 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 57,827 psi | 89% | 2802 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 57,827 psi | 89% | 2802 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 57,450 psi | 88% | 2776 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,095 psi | 76% | 2743 fps | 99% |
| Accurate 4064 | <<locked>> | 88% | 58,030 psi | 89% | 2795 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,187 psi | 85% | 2854 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 57,769 psi | 89% | 2831 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,405 psi | 85% | 2785 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 56,811 psi | 87% | 2897 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,376 psi | 87% | 2776 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 58,305 psi | 90% | 2743 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 58,479 psi | 90% | 2966 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,970 psi | 86% | 2808 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,405 psi | 87% | 2831 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 56,231 psi | 87% | 2910 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 57,595 psi | 89% | 2936 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,753 psi | 86% | 2884 fps | 98.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,066 psi | 75% | 2822 fps | 97% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,180 psi | 71% | 2762 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,451 psi | 62% | 2680 fps | 98% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,837 psi | 81% | 2953 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 57,943 psi | 89% | 2854 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 56,739 psi | 87% | 2825 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,066 psi | 75% | 2822 fps | 97% |
| Bofors RP7 | <<locked>> | 92% | 56,405 psi | 87% | 2812 fps | 98.8% |
| Hodgdon Benchmark | <<locked>> | 82% | 57,798 psi | 89% | 2756 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,188 psi | 86% | 2808 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,246 psi | 88% | 2841 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 55,579 psi | 86% | 2877 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 94% | 55,956 psi | 86% | 2841 fps | 98.3% |
| Hodgdon H4895 | <<locked>> | 84% | 58,407 psi | 90% | 2838 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,536 psi | 87% | 2835 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 58,798 psi | 90% | 2881 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 58,407 psi | 90% | 2949 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,940 psi | 55% | 1722 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 58,726 psi | 90% | 2831 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 57,537 psi | 89% | 2795 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 57,725 psi | 89% | 2808 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,768 psi | 87% | 2789 fps | 99.2% |
| IMR 4350 | <<locked>> | 96% | 57,261 psi | 88% | 2841 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 92% | 58,146 psi | 89% | 2838 fps | 99.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,362 psi | 87% | 2854 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 57,870 psi | 89% | 2861 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 56,318 psi | 87% | 2828 fps | 96.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,793 psi | 80% | 2858 fps | 96% |
| IMR 8208 XBR | <<locked>> | 82% | 56,376 psi | 87% | 2776 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 58,146 psi | 89% | 2805 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,797 psi | 87% | 2759 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 58,262 psi | 90% | 2808 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 57,769 psi | 89% | 2828 fps | 99.8% |
| Lovex S070 | <<locked>> | 94% | 55,506 psi | 85% | 2818 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,466 psi | 62% | 2589 fps | 97.3% |
| Norma 201 | <<locked>> | 84% | 56,130 psi | 86% | 2772 fps | 100% |
| Norma 202 | <<locked>> | 84% | 57,058 psi | 88% | 2769 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,666 psi | 86% | 2818 fps | 100% |
| Norma 204 | <<locked>> | 96% | 58,233 psi | 90% | 2897 fps | 98.2% |
| Norma MRPᴾ | <<locked>> | 100% | 52,083 psi | 80% | 2907 fps | 98.8% |
| Norma URP | <<locked>> | 96% | 57,580 psi | 89% | 2890 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 56,391 psi | 87% | 2844 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,695 psi | 86% | 2933 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 96% | 56,695 psi | 87% | 2897 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,892 psi | 74% | 2779 fps | 97.3% |
| Ramshot TAC | <<locked>> | 82% | 56,768 psi | 87% | 2808 fps | 99.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,724 psi | 87% | 2822 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,579 psi | 56% | 1762 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 57,479 psi | 88% | 2828 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 57,377 psi | 88% | 2900 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 57,203 psi | 88% | 2930 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 55,085 psi | 85% | 2877 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 57,928 psi | 89% | 2966 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 57,014 psi | 88% | 2749 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 57,000 psi | 88% | 2776 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,623 psi | 87% | 2818 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 58,610 psi | 90% | 2867 fps | 97.4% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,636 psi | 84% | 2867 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 92% | 56,405 psi | 87% | 2812 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 94% | 57,769 psi | 89% | 2828 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 84% | 58,146 psi | 89% | 2805 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 58,262 psi | 90% | 2808 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,506 psi | 85% | 2818 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 58,697 psi | 90% | 2881 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,303 psi | 85% | 2785 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,289 psi | 87% | 2805 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 57,595 psi | 89% | 2707 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 58,117 psi | 89% | 2707 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 57,827 psi | 89% | 2785 fps | 99.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,143 psi | 83% | 2861 fps | 98% |
| Somchem S335 | <<locked>> | 84% | 56,797 psi | 87% | 2700 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,230 psi | 85% | 2776 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 56,536 psi | 87% | 2812 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 56,623 psi | 87% | 2805 fps | 96.2% |
| Somchem S365 | <<locked>> | 98% | 56,681 psi | 87% | 2890 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,376 psi | 85% | 2844 fps | 98.8% |
| Unknown powder | <<locked>> | 94% | 58,668 psi | 90% | 2900 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 58,102 psi | 89% | 2690 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 57,058 psi | 88% | 2730 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,711 psi | 89% | 2749 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 58,392 psi | 90% | 2792 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 56,492 psi | 87% | 2838 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 47,790 psi | 74% | 2710 fps | 97.1% |
| Vihtavuori N530 | <<locked>> | 82% | 57,116 psi | 88% | 2779 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 55,680 psi | 86% | 2746 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,477 psi | 85% | 2841 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,547 psi | 79% | 2838 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,202 psi | 86% | 2805 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,579 psi | 86% | 2877 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,582 psi | 64% | 2808 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 58,015 psi | 89% | 2871 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 2015 | <<locked>> | 80% | 54,911 psi | 84% | 2671 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 47,442 psi | 73% | 2602 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 54,012 psi | 83% | 2749 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 54,012 psi | 83% | 2749 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 41,350 psi | 64% | 2507 fps | 95.6% |
| Accurate 3100 | <<locked>> | 90% | 34,592 psi | 53% | 2464 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 44,976 psi | 69% | 2608 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,750 psi | 52% | 2457 fps | 97% |
| ADI AR 2206H | <<locked>> | 80% | 50,937 psi | 78% | 2730 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,178 psi | 66% | 2582 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 43,395 psi | 67% | 2664 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,069 psi | 82% | 2730 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 54,650 psi | 84% | 2697 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,224 psi | 73% | 2785 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,265 psi | 67% | 2605 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,427 psi | 71% | 2674 fps | 99.8% |
| Alliant Reloder-16 | 45.2 gr | 80% | 33,605 psi | 52% | 2474 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,681 psi | 58% | 2595 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 42,873 psi | 66% | 2657 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 42,975 psi | 66% | 2707 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 82% | 25,773 psi | 40% | 2277 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 94% | 33,315 psi | 51% | 2503 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 86% | 31,575 psi | 49% | 2503 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,546 psi | 78% | 2743 fps | 99.9% |
| Bofors RP3 | <<locked>> | 80% | 43,265 psi | 67% | 2615 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 42,975 psi | 66% | 2707 fps | 95.4% |
| Bofors RP7 | <<locked>> | 82% | 41,060 psi | 63% | 2543 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 54,447 psi | 84% | 2710 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,605 psi | 81% | 2756 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,888 psi | 68% | 2625 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 80% | 39,305 psi | 60% | 2582 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 86% | 43,627 psi | 67% | 2628 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 51,474 psi | 79% | 2740 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,009 psi | 48% | 2372 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,150 psi | 69% | 2674 fps | 100% |
| Hodgdon Superformance | 54 gr | 84% | 40,524 psi | 62% | 2638 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,774 psi | 41% | 1535 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,730 psi | 70% | 2631 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 47,703 psi | 73% | 2657 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,366 psi | 65% | 2562 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,771 psi | 64% | 2530 fps | 96.6% |
| IMR 4350 | <<locked>> | 84% | 38,914 psi | 60% | 2516 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,914 psi | 61% | 2516 fps | 95.9% |
| IMR 4831 | <<locked>> | 80% | 29,544 psi | 45% | 2336 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 47,630 psi | 73% | 2703 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 52,721 psi | 81% | 2769 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 98% | 48,602 psi | 75% | 2802 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 53,069 psi | 82% | 2730 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,763 psi | 78% | 2703 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,125 psi | 77% | 2657 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,382 psi | 70% | 2615 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,362 psi | 57% | 2470 fps | 96.7% |
| Lovex S070 | <<locked>> | 82% | 37,840 psi | 58% | 2497 fps | 95.6% |
| Lovex S071 | <<locked>> | 96% | 35,404 psi | 54% | 2484 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 49,676 psi | 76% | 2677 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,198 psi | 77% | 2674 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,774 psi | 70% | 2661 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 44,164 psi | 68% | 2661 fps | 95.3% |
| Norma MRP | <<locked>> | 92% | 39,450 psi | 61% | 2661 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 33,982 psi | 52% | 2461 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 80% | 45,876 psi | 71% | 2680 fps | 99.9% |
| Ramshot Grand | <<locked>> | 96% | 47,834 psi | 74% | 2799 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 82% | 35,288 psi | 54% | 2500 fps | 95.5% |
| Ramshot Magnum | <<locked>> | 96% | 41,118 psi | 63% | 2648 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 52,982 psi | 82% | 2749 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 53,127 psi | 82% | 2769 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,195 psi | 42% | 1575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,990 psi | 68% | 2605 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,937 psi | 77% | 2789 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,147 psi | 62% | 2654 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,504 psi | 52% | 2474 fps | 96.5% |
| ReloadSwiss RS 70 | 49.4 gr | 80% | 33,025 psi | 51% | 2477 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 53,693 psi | 83% | 2700 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,166 psi | 73% | 2628 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,698 psi | 63% | 2559 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 48,124 psi | 74% | 2700 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 92% | 41,713 psi | 64% | 2638 fps | 95% |
| Rottweil R 907 | <<locked>> | 82% | 41,060 psi | 63% | 2543 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,362 psi | 57% | 2470 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,763 psi | 78% | 2703 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,382 psi | 70% | 2615 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 37,840 psi | 58% | 2497 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,959 psi | 65% | 2615 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,721 psi | 80% | 2733 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,400 psi | 76% | 2700 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,850 psi | 78% | 2618 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,728 psi | 66% | 2487 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 36,535 psi | 56% | 2415 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 44,353 psi | 68% | 2694 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 50,430 psi | 78% | 2615 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,416 psi | 79% | 2720 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,292 psi | 64% | 2562 fps | 99.7% |
| Somchem S361 | <<locked>> | 96% | 53,026 psi | 82% | 2753 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 30,356 psi | 47% | 2411 fps | 98.8% |
| Somchem S385 | <<locked>> | 90% | 39,581 psi | 61% | 2566 fps | 95.3% |
| Unknown powder | <<locked>> | 80% | 36,854 psi | 57% | 2516 fps | 97.2% |
| Vihtavuori N133 | <<locked>> | 80% | 51,416 psi | 79% | 2602 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,413 psi | 73% | 2598 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,747 psi | 73% | 2612 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,392 psi | 61% | 2497 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 35,389 psi | 54% | 2464 fps | 97.3% |
| Vihtavuori N165 | <<locked>> | 96% | 41,843 psi | 64% | 2602 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 53,374 psi | 82% | 2726 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,977 psi | 71% | 2605 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,795 psi | 54% | 2461 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 82% | 28,007 psi | 43% | 2349 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,708 psi | 53% | 2438 fps | 99% |
| Winchester 760 | <<locked>> | 80% | 39,305 psi | 60% | 2582 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,831 psi | 40% | 2356 fps | 95.7% |
| Winchester Supreme 780 | <<locked>> | 92% | 43,236 psi | 67% | 2631 fps | 95.2% |
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 121 powders for .280 Ackley Improved loaded with the .284 | 154gr | Peregrine VLR-5. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,966 fps; across all powders the maximum-charge window runs from 1,722 fps to 2,966 fps. Accurate 3100 gives the best case fill at 100 %, and 121 of the 121 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 154.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. ReloadSwiss RS 70, Alliant Reloder-16, Hodgdon Superformance rank at the top here: for .280 Ackley Improved with the .284 | 154gr | Peregrine VLR-5 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, Baschieri & Pellagri 109, Bofors RP30 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.