Load Specifications
Bullet Manufacturer:Peregrine
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:1:8.0
Load data in caliber .280 Ackley Improved with .284 | 168gr | Peregrine Glider GRM 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, Hodgdon Superformance and Alliant Reloder-16.
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% | 55,230 psi | 85% | 2579 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,406 psi | 88% | 2661 fps | 99.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,386 psi | 78% | 2644 fps | 99.5% |
| Accurate 4064 | <<locked>> | 86% | 55,680 psi | 86% | 2635 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,347 psi | 87% | 2740 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 52,199 psi | 80% | 2772 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 84% | 58,798 psi | 90% | 2713 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,478 psi | 87% | 2671 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 58,015 psi | 89% | 2792 fps | 98.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 51,866 psi | 80% | 2726 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 82% | 57,522 psi | 88% | 2657 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,579 psi | 86% | 2789 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,971 psi | 88% | 2690 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,334 psi | 88% | 2713 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,609 psi | 89% | 2795 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,201 psi | 85% | 2772 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,043 psi | 88% | 2779 fps | 98.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,401 psi | 78% | 2723 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,514 psi | 73% | 2664 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,394 psi | 64% | 2589 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,288 psi | 84% | 2844 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,347 psi | 85% | 2687 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,180 psi | 71% | 2651 fps | 96.9% |
| Bofors RP3 | <<locked>> | 88% | 57,986 psi | 89% | 2707 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,401 psi | 78% | 2723 fps | 98% |
| Bofors RP7 | <<locked>> | 92% | 57,334 psi | 88% | 2697 fps | 99.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 58,755 psi | 90% | 2635 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 57,566 psi | 89% | 2690 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 58,508 psi | 90% | 2730 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 55,463 psi | 85% | 2746 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 90% | 55,463 psi | 85% | 2707 fps | 98.7% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 55,506 psi | 85% | 2730 fps | 96.8% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 54,505 psi | 84% | 2713 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 82% | 55,854 psi | 86% | 2671 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 57,783 psi | 89% | 2720 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,144 psi | 86% | 2710 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,651 psi | 86% | 2785 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,114 psi | 56% | 1631 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,159 psi | 88% | 2677 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,637 psi | 87% | 2648 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,883 psi | 86% | 2654 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,347 psi | 85% | 2641 fps | 99.4% |
| IMR 4350 | <<locked>> | 96% | 58,378 psi | 90% | 2730 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,579 psi | 86% | 2674 fps | 99.4% |
| IMR 4831 | <<locked>> | 96% | 56,971 psi | 88% | 2733 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,245 psi | 85% | 2690 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 57,406 psi | 88% | 2720 fps | 97.3% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 49,153 psi | 76% | 2697 fps | 96.2% |
| IMR 8208 XBR | <<locked>> | 82% | 57,522 psi | 88% | 2657 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,463 psi | 85% | 2638 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,856 psi | 89% | 2641 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,840 psi | 86% | 2644 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,303 psi | 85% | 2667 fps | 99.9% |
| Lovex S070 | <<locked>> | 94% | 56,710 psi | 87% | 2710 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,698 psi | 64% | 2500 fps | 98.2% |
| Norma 201 | <<locked>> | 84% | 57,319 psi | 88% | 2654 fps | 100% |
| Norma 202 | <<locked>> | 84% | 58,334 psi | 90% | 2654 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,550 psi | 87% | 2700 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,303 psi | 85% | 2730 fps | 98.4% |
| Norma MRPᴾ | <<locked>> | 100% | 53,447 psi | 82% | 2802 fps | 99.4% |
| Norma URP | <<locked>> | 94% | 55,390 psi | 85% | 2730 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 57,522 psi | 88% | 2726 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 49,313 psi | 76% | 2710 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 96% | 57,914 psi | 89% | 2785 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 43,526 psi | 67% | 2585 fps | 97% |
| Ramshot TAC | <<locked>> | 82% | 57,812 psi | 89% | 2694 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 82% | 57,740 psi | 89% | 2703 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,811 psi | 57% | 1673 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 58,581 psi | 90% | 2717 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 58,552 psi | 90% | 2779 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 58,798 psi | 90% | 2815 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,318 psi | 87% | 2766 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,027 psi | 85% | 2795 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,147 psi | 62% | 2602 fps | 96.9% |
| Rottweil R 901 | <<locked>> | 82% | 57,812 psi | 89% | 2625 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 57,928 psi | 89% | 2654 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 57,870 psi | 89% | 2700 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,970 psi | 86% | 2707 fps | 97.6% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,941 psi | 86% | 2759 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 92% | 57,334 psi | 88% | 2697 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,303 psi | 85% | 2667 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,463 psi | 85% | 2638 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,840 psi | 86% | 2644 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,710 psi | 87% | 2710 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,985 psi | 86% | 2713 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,391 psi | 87% | 2674 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,217 psi | 88% | 2687 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 58,494 psi | 90% | 2589 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,825 psi | 86% | 2549 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,071 psi | 85% | 2621 fps | 99.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,448 psi | 85% | 2756 fps | 98.7% |
| Somchem S335 | <<locked>> | 84% | 57,914 psi | 89% | 2585 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,333 psi | 87% | 2661 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 57,638 psi | 89% | 2694 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 57,856 psi | 89% | 2703 fps | 97.1% |
| Somchem S365 | <<locked>> | 98% | 58,305 psi | 90% | 2779 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 56,753 psi | 87% | 2740 fps | 99.3% |
| Vihtavuori N133 | <<locked>> | 82% | 55,376 psi | 85% | 2526 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 58,262 psi | 90% | 2612 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 58,813 psi | 90% | 2631 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,753 psi | 86% | 2628 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 57,522 psi | 88% | 2720 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,979 psi | 75% | 2612 fps | 98% |
| Vihtavuori N530 | <<locked>> | 82% | 58,059 psi | 89% | 2657 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 57,014 psi | 88% | 2635 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,695 psi | 87% | 2730 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,055 psi | 82% | 2733 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 53,969 psi | 83% | 2792 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 57,508 psi | 88% | 2694 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 58,711 psi | 90% | 2703 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,463 psi | 85% | 2746 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,641 psi | 66% | 2713 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 57,348 psi | 88% | 2694 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,142 psi | 82% | 2680 fps | 98.1% |
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% | 48,341 psi | 74% | 2490 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,934 psi | 72% | 2503 fps | 97.7% |
| Accurate 3100 | <<locked>> | 88% | 33,040 psi | 51% | 2326 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 45,818 psi | 70% | 2497 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,621 psi | 53% | 2369 fps | 98% |
| Accurate MAGPRO | <<locked>> | 98% | 48,820 psi | 75% | 2717 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 51,851 psi | 80% | 2615 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,034 psi | 68% | 2480 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 41,742 psi | 64% | 2520 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 98% | 48,269 psi | 74% | 2664 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,027 psi | 83% | 2612 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,385 psi | 74% | 2680 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,309 psi | 68% | 2503 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,369 psi | 73% | 2566 fps | 100% |
| Alliant Reloder-16 | 43.1 gr | 80% | 34,447 psi | 53% | 2388 fps | 98.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,812 psi | 60% | 2503 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 41,075 psi | 63% | 2510 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 41,104 psi | 63% | 2556 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 24,729 psi | 38% | 2149 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,068 psi | 49% | 2369 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 84% | 30,182 psi | 46% | 2362 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,706 psi | 80% | 2635 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 40,495 psi | 62% | 2543 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 44,280 psi | 68% | 2510 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 41,104 psi | 63% | 2556 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 39,247 psi | 60% | 2392 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 80% | 55,230 psi | 85% | 2589 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,722 psi | 83% | 2641 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,904 psi | 69% | 2523 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 36,999 psi | 57% | 2421 fps | 96% |
| Hodgdon H4350 | <<locked>> | 80% | 40,045 psi | 62% | 2441 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 96% | 48,588 psi | 75% | 2621 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 50,691 psi | 78% | 2654 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 52,431 psi | 81% | 2625 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,836 psi | 49% | 2287 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,081 psi | 76% | 2612 fps | 100% |
| Hodgdon Superformance | 49 gr | 80% | 35,824 psi | 55% | 2425 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,963 psi | 41% | 1457 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,343 psi | 77% | 2582 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,953 psi | 81% | 2602 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,311 psi | 71% | 2510 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,544 psi | 75% | 2539 fps | 98.6% |
| IMR 4350 | <<locked>> | 82% | 37,449 psi | 58% | 2379 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,843 psi | 63% | 2425 fps | 96.9% |
| IMR 4831 | <<locked>> | 80% | 33,475 psi | 51% | 2329 fps | 97.7% |
| IMR 4895 | <<locked>> | 80% | 48,573 psi | 75% | 2592 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 47,514 psi | 73% | 2566 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 98% | 46,006 psi | 71% | 2638 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 80% | 54,027 psi | 83% | 2612 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,982 psi | 80% | 2592 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,068 psi | 79% | 2546 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,354 psi | 71% | 2507 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,029 psi | 59% | 2372 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 36,245 psi | 56% | 2352 fps | 95.9% |
| Lovex S071 | <<locked>> | 92% | 32,039 psi | 49% | 2300 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 50,444 psi | 78% | 2559 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,343 psi | 79% | 2562 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,688 psi | 72% | 2552 fps | 100% |
| Norma 204 | <<locked>> | 86% | 42,192 psi | 65% | 2510 fps | 95.5% |
| Norma MRP | <<locked>> | 88% | 35,041 psi | 54% | 2451 fps | 95% |
| Norma URP | <<locked>> | 80% | 34,766 psi | 53% | 2369 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 80% | 46,920 psi | 72% | 2575 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 45,701 psi | 70% | 2644 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 33,649 psi | 52% | 2352 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 96% | 37,710 psi | 58% | 2470 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 54,099 psi | 83% | 2641 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 53,954 psi | 83% | 2651 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,441 psi | 42% | 1493 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,049 psi | 69% | 2507 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,937 psi | 78% | 2674 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,307 psi | 64% | 2556 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,403 psi | 53% | 2388 fps | 97.6% |
| ReloadSwiss RS 70 | 47.1 gr | 80% | 33,837 psi | 52% | 2395 fps | 96.9% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 37,405 psi | 58% | 2536 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 54,592 psi | 84% | 2582 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 48,095 psi | 74% | 2516 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,553 psi | 64% | 2457 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 46,079 psi | 71% | 2549 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 90% | 40,161 psi | 62% | 2493 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 39,247 psi | 60% | 2392 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,029 psi | 59% | 2372 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,982 psi | 80% | 2592 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,354 psi | 71% | 2507 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,245 psi | 56% | 2352 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,801 psi | 66% | 2510 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,576 psi | 81% | 2618 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,241 psi | 77% | 2589 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,648 psi | 79% | 2500 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,482 psi | 67% | 2379 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,275 psi | 57% | 2323 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 39,769 psi | 61% | 2490 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 51,140 psi | 79% | 2497 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,562 psi | 81% | 2612 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,047 psi | 65% | 2457 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 50,444 psi | 78% | 2595 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 31,328 psi | 48% | 2333 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 38,116 psi | 59% | 2425 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 52,228 psi | 80% | 2484 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,341 psi | 74% | 2484 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,588 psi | 75% | 2500 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,161 psi | 62% | 2395 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,201 psi | 56% | 2369 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 94% | 39,885 psi | 61% | 2454 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 54,404 psi | 84% | 2612 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 46,992 psi | 72% | 2497 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,708 psi | 55% | 2372 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 26,876 psi | 41% | 2218 fps | 95.6% |
| Vihtavuori N560 | <<locked>> | 96% | 47,079 psi | 72% | 2677 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,563 psi | 55% | 2349 fps | 99.6% |
| Winchester 748 | <<locked>> | 80% | 55,071 psi | 85% | 2661 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 36,999 psi | 57% | 2421 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 84% | 24,743 psi | 38% | 2224 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,241 psi | 77% | 2595 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 40,176 psi | 62% | 2461 fps | 95% |
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 | 168gr | Peregrine Glider GRM. Alliant Reloder-26 delivers the highest muzzle velocity at 2,844 fps; across all powders the maximum-charge window runs from 1,631 fps to 2,844 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 168.0 gr projectile in 0.284" calls for a 1:8.0 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, Hodgdon Superformance, Alliant Reloder-16 rank at the top here: for .280 Ackley Improved with the .284 | 168gr | Peregrine Glider GRM 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.