Load Specifications
Bullet Manufacturer:Peregrine
Bullet Weight:165 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 | 165gr | Peregrine VLR-5 bullet and 114 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% | 56,028 psi | 86% | 2621 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 58,117 psi | 89% | 2703 fps | 99.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,126 psi | 79% | 2684 fps | 99.5% |
| Accurate 4064 | <<locked>> | 86% | 56,449 psi | 87% | 2674 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 57,421 psi | 88% | 2785 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 53,388 psi | 82% | 2822 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 82% | 55,941 psi | 86% | 2707 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,072 psi | 88% | 2713 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 58,711 psi | 90% | 2835 fps | 98.9% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,446 psi | 81% | 2769 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 58,218 psi | 90% | 2700 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,449 psi | 87% | 2835 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 58,639 psi | 90% | 2828 fps | 98.9% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 58,639 psi | 90% | 2828 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,856 psi | 89% | 2733 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 58,276 psi | 90% | 2759 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 58,291 psi | 90% | 2838 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,898 psi | 86% | 2812 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,740 psi | 89% | 2818 fps | 98.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,068 psi | 79% | 2766 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,283 psi | 74% | 2703 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,989 psi | 65% | 2631 fps | 99% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,492 psi | 85% | 2894 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,840 psi | 86% | 2726 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,847 psi | 72% | 2694 fps | 97.1% |
| Bofors RP3 | <<locked>> | 88% | 58,552 psi | 90% | 2749 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,068 psi | 79% | 2766 fps | 98.1% |
| Bofors RP7 | <<locked>> | 92% | 58,030 psi | 89% | 2740 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 82% | 58,131 psi | 89% | 2733 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 55,419 psi | 85% | 2720 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 56,028 psi | 86% | 2785 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 90% | 56,144 psi | 86% | 2749 fps | 98.8% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,463 psi | 87% | 2776 fps | 97% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 55,129 psi | 85% | 2756 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 82% | 56,608 psi | 87% | 2717 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 58,740 psi | 90% | 2762 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,710 psi | 87% | 2753 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,318 psi | 87% | 2828 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,100 psi | 56% | 1657 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,812 psi | 89% | 2717 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,217 psi | 88% | 2687 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,550 psi | 87% | 2694 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,912 psi | 86% | 2684 fps | 99.5% |
| IMR 4350 | <<locked>> | 94% | 55,434 psi | 85% | 2723 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,260 psi | 87% | 2717 fps | 99.5% |
| IMR 4831 | <<locked>> | 96% | 57,856 psi | 89% | 2776 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,927 psi | 86% | 2733 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 58,059 psi | 89% | 2762 fps | 97.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,067 psi | 77% | 2743 fps | 96.4% |
| IMR 8208 XBR | <<locked>> | 82% | 58,218 psi | 90% | 2700 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,188 psi | 86% | 2680 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 58,233 psi | 90% | 2680 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,521 psi | 87% | 2687 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,028 psi | 86% | 2710 fps | 99.9% |
| Lovex S070 | <<locked>> | 94% | 57,305 psi | 88% | 2749 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,293 psi | 65% | 2539 fps | 98.3% |
| Norma 201 | <<locked>> | 84% | 58,030 psi | 89% | 2697 fps | 100% |
| Norma 202 | <<locked>> | 84% | 58,726 psi | 90% | 2690 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,522 psi | 88% | 2746 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,086 psi | 86% | 2772 fps | 98.5% |
| Norma MRPᴾ | <<locked>> | 100% | 54,404 psi | 84% | 2848 fps | 99.5% |
| Norma URP | <<locked>> | 94% | 56,101 psi | 86% | 2772 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 58,262 psi | 90% | 2769 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 50,125 psi | 77% | 2753 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 96% | 58,668 psi | 90% | 2828 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,541 psi | 69% | 2635 fps | 97.2% |
| Ramshot TAC | <<locked>> | 82% | 58,233 psi | 90% | 2733 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 82% | 58,566 psi | 90% | 2746 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,782 psi | 57% | 1699 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,419 psi | 85% | 2707 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,521 psi | 85% | 2772 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,419 psi | 85% | 2805 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,493 psi | 88% | 2812 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,057 psi | 86% | 2841 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,698 psi | 63% | 2641 fps | 97% |
| Rottweil R 901 | <<locked>> | 82% | 58,726 psi | 90% | 2667 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 58,639 psi | 90% | 2697 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 58,726 psi | 90% | 2746 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,753 psi | 87% | 2749 fps | 97.7% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 57,029 psi | 88% | 2808 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 92% | 58,030 psi | 89% | 2740 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,028 psi | 86% | 2710 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,188 psi | 86% | 2680 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,521 psi | 87% | 2687 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,305 psi | 88% | 2749 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,724 psi | 87% | 2756 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,217 psi | 88% | 2717 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 58,059 psi | 89% | 2730 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,724 psi | 86% | 2585 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,478 psi | 87% | 2589 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,999 psi | 86% | 2667 fps | 99.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,536 psi | 87% | 2802 fps | 98.8% |
| Somchem S335 | <<locked>> | 84% | 58,595 psi | 90% | 2625 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,811 psi | 87% | 2700 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 58,494 psi | 90% | 2740 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 58,624 psi | 90% | 2746 fps | 97.3% |
| Somchem S365 | <<locked>> | 96% | 55,100 psi | 85% | 2769 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,435 psi | 88% | 2779 fps | 99.4% |
| Vihtavuori N133 | <<locked>> | 82% | 56,260 psi | 87% | 2569 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,448 psi | 85% | 2608 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,883 psi | 86% | 2628 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,507 psi | 87% | 2671 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 58,523 psi | 90% | 2766 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,632 psi | 76% | 2651 fps | 98.1% |
| Vihtavuori N530 | <<locked>> | 82% | 58,769 psi | 90% | 2700 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 57,508 psi | 88% | 2671 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,537 psi | 89% | 2772 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,954 psi | 83% | 2776 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,868 psi | 84% | 2841 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 58,494 psi | 90% | 2736 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,376 psi | 87% | 2789 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,424 psi | 67% | 2756 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 58,160 psi | 89% | 2736 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,085 psi | 83% | 2726 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% | 49,226 psi | 76% | 2533 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,500 psi | 73% | 2543 fps | 97.8% |
| Accurate 3100 | <<locked>> | 86% | 31,502 psi | 48% | 2313 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 46,659 psi | 72% | 2539 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,099 psi | 54% | 2408 fps | 98% |
| Accurate MAGPRO | <<locked>> | 98% | 49,676 psi | 76% | 2759 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 52,344 psi | 81% | 2654 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,556 psi | 69% | 2520 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 42,337 psi | 65% | 2559 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 96% | 45,818 psi | 70% | 2651 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,476 psi | 84% | 2651 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,994 psi | 75% | 2720 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 42,177 psi | 65% | 2556 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 42,177 psi | 65% | 2556 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,802 psi | 69% | 2543 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,819 psi | 74% | 2605 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,867 psi | 54% | 2425 fps | 98.3% |
| Alliant Reloder-17 | 47.7 gr | 80% | 39,378 psi | 61% | 2543 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 41,684 psi | 64% | 2549 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 41,814 psi | 64% | 2598 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,208 psi | 39% | 2188 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,503 psi | 50% | 2408 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 84% | 30,690 psi | 47% | 2405 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,243 psi | 80% | 2674 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 41,017 psi | 63% | 2579 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 44,759 psi | 69% | 2549 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 41,814 psi | 64% | 2598 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 39,653 psi | 61% | 2428 fps | 96.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 54,346 psi | 84% | 2684 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 45,310 psi | 70% | 2559 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 37,362 psi | 57% | 2457 fps | 96.1% |
| Hodgdon H4350 | <<locked>> | 80% | 40,437 psi | 62% | 2480 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 96% | 49,255 psi | 76% | 2664 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 48,109 psi | 74% | 2641 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 52,910 psi | 81% | 2664 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,300 psi | 50% | 2323 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,748 psi | 77% | 2651 fps | 100% |
| Hodgdon Superformance | <<locked>> | 80% | 36,405 psi | 56% | 2464 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,963 psi | 41% | 1480 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,792 psi | 78% | 2618 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,621 psi | 82% | 2641 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,833 psi | 72% | 2549 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,226 psi | 76% | 2582 fps | 98.7% |
| IMR 4350 | <<locked>> | 82% | 37,797 psi | 58% | 2411 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,220 psi | 63% | 2461 fps | 97% |
| IMR 4831 | <<locked>> | 80% | 34,142 psi | 53% | 2369 fps | 97.8% |
| IMR 4895 | <<locked>> | 80% | 49,066 psi | 75% | 2631 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 48,008 psi | 74% | 2605 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 98% | 46,644 psi | 72% | 2680 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 54,476 psi | 84% | 2651 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,417 psi | 81% | 2631 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,561 psi | 79% | 2585 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,876 psi | 72% | 2546 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,667 psi | 59% | 2415 fps | 97.7% |
| Lovex S070 | <<locked>> | 80% | 36,854 psi | 57% | 2395 fps | 96.1% |
| Lovex S071 | <<locked>> | 92% | 32,489 psi | 50% | 2336 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 51,285 psi | 79% | 2605 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,880 psi | 80% | 2602 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,181 psi | 73% | 2592 fps | 100% |
| Norma 204 | <<locked>> | 86% | 42,641 psi | 66% | 2546 fps | 95.6% |
| Norma MRP | <<locked>> | 88% | 35,752 psi | 55% | 2497 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 35,433 psi | 55% | 2411 fps | 98% |
| Ramshot Big Game | <<locked>> | 80% | 47,529 psi | 73% | 2615 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 46,543 psi | 72% | 2690 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 34,185 psi | 53% | 2392 fps | 95.9% |
| Ramshot Magnum | <<locked>> | 96% | 38,421 psi | 59% | 2513 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 54,592 psi | 84% | 2680 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 54,839 psi | 84% | 2697 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,412 psi | 42% | 1516 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,600 psi | 70% | 2549 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,735 psi | 80% | 2717 fps | 100% |
| ReloadSwiss RS 60 | 47.7 gr | 80% | 41,901 psi | 64% | 2595 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,983 psi | 54% | 2425 fps | 97.7% |
| ReloadSwiss RS 70 | 48.4 gr | 80% | 34,258 psi | 53% | 2434 fps | 97% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 37,942 psi | 58% | 2575 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 55,230 psi | 85% | 2625 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 48,660 psi | 75% | 2556 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,308 psi | 65% | 2500 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 46,688 psi | 72% | 2592 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 90% | 40,582 psi | 62% | 2530 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 39,653 psi | 61% | 2428 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,667 psi | 59% | 2415 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,417 psi | 81% | 2631 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,876 psi | 72% | 2546 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,854 psi | 57% | 2395 fps | 96.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,410 psi | 67% | 2552 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,432 psi | 82% | 2664 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,865 psi | 78% | 2631 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,257 psi | 80% | 2539 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,019 psi | 68% | 2418 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,652 psi | 58% | 2356 fps | 96.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,190 psi | 62% | 2526 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 51,953 psi | 80% | 2539 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,127 psi | 82% | 2651 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,786 psi | 66% | 2500 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 48,022 psi | 74% | 2585 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 31,734 psi | 49% | 2365 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 38,522 psi | 59% | 2461 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 52,852 psi | 81% | 2523 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,008 psi | 75% | 2526 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,371 psi | 76% | 2539 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,857 psi | 63% | 2438 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,637 psi | 56% | 2408 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 92% | 38,087 psi | 59% | 2444 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 54,853 psi | 84% | 2648 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 47,369 psi | 73% | 2533 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,071 psi | 55% | 2408 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 27,514 psi | 42% | 2257 fps | 95.8% |
| Vihtavuori N560 | <<locked>> | 96% | 47,718 psi | 73% | 2720 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,955 psi | 55% | 2385 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 37,579 psi | 58% | 2461 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,179 psi | 39% | 2267 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,850 psi | 78% | 2638 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 40,901 psi | 63% | 2503 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 114 powders for .280 Ackley Improved loaded with the .284 | 165gr | Peregrine VLR-5. Alliant Reloder-26 delivers the highest muzzle velocity at 2,894 fps; across all powders the maximum-charge window runs from 1,657 fps to 2,894 fps. Accurate 3100 gives the best case fill at 100 %, and 114 of the 114 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 165.0 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, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .280 Ackley Improved with the .284 | 165gr | Peregrine VLR-5 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.