Load Specifications
Bullet Manufacturer:Peregrine
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:1:8.0
Load data in caliber .280 Ackley Improved with .284 | 160gr | Peregrine Glider GRM bullet and 112 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 2015 | <<locked>> | 82% | 58,407 psi | 90% | 2654 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 57,769 psi | 89% | 2680 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 56,173 psi | 86% | 2710 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,907 psi | 75% | 2687 fps | 99.1% |
| Accurate 4064 | <<locked>> | 88% | 58,059 psi | 89% | 2736 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,013 psi | 85% | 2792 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 57,725 psi | 89% | 2769 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,419 psi | 85% | 2726 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 56,623 psi | 87% | 2838 fps | 98.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,536 psi | 87% | 2717 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 58,334 psi | 90% | 2680 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 58,523 psi | 90% | 2904 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 56,478 psi | 87% | 2831 fps | 98.3% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 56,478 psi | 87% | 2831 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,753 psi | 86% | 2743 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,144 psi | 86% | 2769 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 56,028 psi | 86% | 2848 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 57,566 psi | 89% | 2874 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,637 psi | 86% | 2825 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 48,965 psi | 75% | 2762 fps | 97.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,224 psi | 71% | 2710 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,306 psi | 62% | 2625 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,707 psi | 81% | 2890 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 57,870 psi | 89% | 2792 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 44,918 psi | 69% | 2690 fps | 96.1% |
| Bofors RP3 | <<locked>> | 88% | 56,623 psi | 87% | 2762 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 48,965 psi | 75% | 2762 fps | 97.2% |
| Bofors RP7 | <<locked>> | 92% | 56,043 psi | 86% | 2746 fps | 98.9% |
| Hodgdon Benchmark | <<locked>> | 82% | 57,856 psi | 89% | 2694 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,304 psi | 87% | 2746 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,174 psi | 88% | 2779 fps | 100% |
| Hodgdon H414 | <<locked>> | 94% | 57,769 psi | 89% | 2848 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 92% | 57,943 psi | 89% | 2808 fps | 98.7% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 54,433 psi | 84% | 2776 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 84% | 58,363 psi | 90% | 2779 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,405 psi | 87% | 2772 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 58,755 psi | 90% | 2818 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 58,479 psi | 90% | 2894 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,955 psi | 55% | 1677 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,796 psi | 86% | 2730 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,288 psi | 85% | 2703 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 58,407 psi | 90% | 2756 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 57,812 psi | 89% | 2746 fps | 99.4% |
| IMR 4350 | <<locked>> | 96% | 56,869 psi | 87% | 2776 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 58,175 psi | 89% | 2779 fps | 99.4% |
| IMR 4831 | <<locked>> | 96% | 55,608 psi | 86% | 2785 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 57,624 psi | 89% | 2792 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 56,115 psi | 86% | 2766 fps | 96.6% |
| IMR 8208 XBR | <<locked>> | 82% | 56,536 psi | 87% | 2717 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 57,885 psi | 89% | 2740 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,652 psi | 87% | 2697 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 58,276 psi | 90% | 2746 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 57,841 psi | 89% | 2769 fps | 99.9% |
| Lovex S070 | <<locked>> | 94% | 55,303 psi | 85% | 2756 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,335 psi | 62% | 2536 fps | 97.5% |
| Norma 201 | <<locked>> | 84% | 56,318 psi | 87% | 2713 fps | 100% |
| Norma 202 | <<locked>> | 84% | 56,971 psi | 88% | 2707 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,361 psi | 85% | 2753 fps | 100% |
| Norma 204 | <<locked>> | 96% | 57,986 psi | 89% | 2835 fps | 98.4% |
| Norma MRPᴾ | <<locked>> | 100% | 51,793 psi | 80% | 2844 fps | 98.9% |
| Norma URP | <<locked>> | 96% | 57,812 psi | 89% | 2831 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 56,405 psi | 87% | 2782 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 56,478 psi | 87% | 2835 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 42,467 psi | 65% | 2625 fps | 96.1% |
| Ramshot TAC | <<locked>> | 82% | 56,637 psi | 87% | 2746 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,521 psi | 87% | 2756 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,637 psi | 56% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 57,217 psi | 88% | 2766 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 57,159 psi | 88% | 2835 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 57,029 psi | 88% | 2867 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,810 psi | 84% | 2815 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 57,899 psi | 89% | 2904 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 57,014 psi | 88% | 2687 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 56,869 psi | 87% | 2710 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,492 psi | 87% | 2756 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 58,378 psi | 90% | 2805 fps | 97.6% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,752 psi | 84% | 2808 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 92% | 56,043 psi | 86% | 2746 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 94% | 57,841 psi | 89% | 2769 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 84% | 57,885 psi | 89% | 2740 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 58,276 psi | 90% | 2746 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,303 psi | 85% | 2756 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 58,450 psi | 90% | 2818 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,143 psi | 85% | 2723 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,057 psi | 86% | 2743 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 57,334 psi | 88% | 2644 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 58,160 psi | 89% | 2644 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 57,667 psi | 89% | 2723 fps | 99.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,288 psi | 84% | 2805 fps | 98.2% |
| Somchem S335 | <<locked>> | 84% | 56,971 psi | 88% | 2644 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,071 psi | 85% | 2713 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 56,695 psi | 87% | 2753 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 56,724 psi | 87% | 2753 fps | 96.5% |
| Somchem S365 | <<locked>> | 98% | 56,695 psi | 87% | 2831 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,274 psi | 85% | 2785 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 84% | 57,812 psi | 89% | 2625 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 57,174 psi | 88% | 2667 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,696 psi | 89% | 2690 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 58,059 psi | 89% | 2726 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 56,304 psi | 87% | 2776 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 47,674 psi | 73% | 2651 fps | 97.3% |
| Vihtavuori N530 | <<locked>> | 82% | 57,000 psi | 88% | 2717 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 55,840 psi | 86% | 2687 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,405 psi | 85% | 2782 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,547 psi | 79% | 2782 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 52,402 psi | 81% | 2831 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,101 psi | 86% | 2746 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 57,479 psi | 88% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 57,769 psi | 89% | 2848 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,336 psi | 64% | 2749 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 56,391 psi | 87% | 2753 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 51,982 psi | 80% | 2726 fps | 97.5% |
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% | 54,781 psi | 84% | 2608 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 47,398 psi | 73% | 2546 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,079 psi | 71% | 2546 fps | 97.1% |
| Accurate 3100 | <<locked>> | 90% | 34,519 psi | 53% | 2415 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 44,947 psi | 69% | 2549 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,562 psi | 52% | 2405 fps | 97.2% |
| ADI AR 2206H | <<locked>> | 80% | 50,705 psi | 78% | 2667 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,105 psi | 66% | 2530 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 43,410 psi | 67% | 2612 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,837 psi | 81% | 2667 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 54,578 psi | 84% | 2638 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,268 psi | 73% | 2730 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 43,424 psi | 67% | 2612 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 43,424 psi | 67% | 2612 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,265 psi | 67% | 2549 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,209 psi | 71% | 2615 fps | 99.9% |
| Alliant Reloder-16 | 43.8 gr | 80% | 33,605 psi | 52% | 2425 fps | 97.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,623 psi | 58% | 2543 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 42,902 psi | 66% | 2605 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 42,728 psi | 66% | 2648 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 82% | 25,831 psi | 40% | 2234 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 94% | 33,185 psi | 51% | 2454 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 86% | 31,430 psi | 48% | 2454 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,618 psi | 78% | 2687 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 42,134 psi | 65% | 2635 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 43,091 psi | 66% | 2556 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 42,728 psi | 66% | 2648 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 38,363 psi | 59% | 2431 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 54,462 psi | 84% | 2648 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,605 psi | 81% | 2697 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,758 psi | 67% | 2566 fps | 99% |
| Hodgdon H414 | <<locked>> | 80% | 35,926 psi | 55% | 2454 fps | 95% |
| Hodgdon H4350 | <<locked>> | 82% | 41,858 psi | 64% | 2539 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 98% | 50,633 psi | 78% | 2717 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 51,242 psi | 79% | 2677 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,951 psi | 48% | 2323 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,993 psi | 74% | 2664 fps | 100% |
| Hodgdon Superformance | 51.1 gr | 82% | 37,637 psi | 58% | 2523 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,745 psi | 41% | 1496 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,211 psi | 76% | 2631 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 51,721 psi | 80% | 2657 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,324 psi | 70% | 2559 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,805 psi | 74% | 2589 fps | 98.1% |
| IMR 4350 | <<locked>> | 84% | 38,899 psi | 60% | 2467 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,929 psi | 61% | 2467 fps | 96.2% |
| IMR 4831 | <<locked>> | 80% | 32,735 psi | 50% | 2369 fps | 96.9% |
| IMR 4895 | <<locked>> | 80% | 47,398 psi | 73% | 2641 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 49,298 psi | 76% | 2657 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 52,837 psi | 81% | 2667 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,604 psi | 78% | 2641 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,067 psi | 77% | 2598 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,339 psi | 70% | 2556 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,347 psi | 57% | 2418 fps | 96.9% |
| Lovex S070 | <<locked>> | 80% | 35,549 psi | 55% | 2395 fps | 95.1% |
| Lovex S071 | <<locked>> | 94% | 33,040 psi | 51% | 2382 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 49,647 psi | 76% | 2615 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,198 psi | 77% | 2615 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,585 psi | 70% | 2598 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 44,164 psi | 68% | 2608 fps | 95.6% |
| Norma MRP | <<locked>> | 90% | 36,709 psi | 56% | 2549 fps | 95% |
| Norma URP | <<locked>> | 80% | 33,997 psi | 52% | 2411 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 80% | 45,861 psi | 71% | 2625 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 35,288 psi | 54% | 2451 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 98% | 39,421 psi | 61% | 2562 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 53,055 psi | 82% | 2694 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,866 psi | 81% | 2703 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,180 psi | 42% | 1532 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,150 psi | 68% | 2556 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,835 psi | 77% | 2726 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,103 psi | 62% | 2598 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,460 psi | 51% | 2425 fps | 96.8% |
| ReloadSwiss RS 70 | 47.9 gr | 80% | 33,025 psi | 51% | 2431 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 53,534 psi | 82% | 2638 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,065 psi | 72% | 2569 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,741 psi | 63% | 2507 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 48,182 psi | 74% | 2648 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 92% | 41,742 psi | 64% | 2585 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 38,363 psi | 59% | 2431 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,347 psi | 57% | 2418 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,604 psi | 78% | 2641 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,339 psi | 70% | 2556 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 35,549 psi | 55% | 2395 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,858 psi | 64% | 2559 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,474 psi | 79% | 2671 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,298 psi | 76% | 2641 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,676 psi | 78% | 2556 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,598 psi | 66% | 2431 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 36,390 psi | 56% | 2359 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 41,336 psi | 64% | 2582 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 50,401 psi | 78% | 2556 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,459 psi | 79% | 2661 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,263 psi | 63% | 2507 fps | 99.8% |
| Somchem S361 | <<locked>> | 96% | 52,982 psi | 82% | 2697 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 30,356 psi | 47% | 2365 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 39,566 psi | 61% | 2513 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 51,242 psi | 79% | 2539 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,268 psi | 73% | 2536 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,776 psi | 74% | 2556 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,392 psi | 61% | 2444 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 35,215 psi | 54% | 2408 fps | 97.5% |
| Vihtavuori N165 | <<locked>> | 96% | 41,539 psi | 64% | 2543 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 53,185 psi | 82% | 2664 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,861 psi | 71% | 2546 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,693 psi | 53% | 2408 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 28,065 psi | 43% | 2306 fps | 95.6% |
| Vihtavuori N560 | <<locked>> | 98% | 49,139 psi | 76% | 2776 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,766 psi | 53% | 2388 fps | 99.2% |
| Winchester 748 | <<locked>> | 80% | 53,621 psi | 82% | 2710 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 36,143 psi | 56% | 2461 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,802 psi | 40% | 2310 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,182 psi | 76% | 2648 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 41,945 psi | 65% | 2556 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 112 powders for .280 Ackley Improved loaded with the .284 | 160gr | Peregrine Glider GRM. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,904 fps; across all powders the maximum-charge window runs from 1,677 fps to 2,904 fps. Accurate 3100 gives the best case fill at 100 %, and 112 of the 112 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 160.0 gr projectile in 0.284" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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 | 160gr | 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.