Load Specifications
Bullet:.284 | 168gr | CutEdge MTH
Bullet Manufacturer:Cutting Edge
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:1:7.5
Load data in caliber .280 Ackley Improved with .284 | 168gr | CutEdge MTH bullet and 107 powders. The key underlying parameters are shown in the table above.
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% | 56,753 psi | 87% | 2605 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 58,769 psi | 90% | 2690 fps | 99.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,924 psi | 80% | 2674 fps | 99.7% |
| Accurate 4064 | <<locked>> | 86% | 57,145 psi | 88% | 2657 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 58,276 psi | 90% | 2772 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 54,273 psi | 83% | 2812 fps | 96.5% |
| ADI AR 2206H | <<locked>> | 82% | 56,536 psi | 87% | 2690 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,682 psi | 89% | 2697 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,825 psi | 86% | 2769 fps | 98.7% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,214 psi | 82% | 2759 fps | 97.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 57,217 psi | 88% | 2818 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 58,537 psi | 90% | 2717 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,100 psi | 85% | 2690 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,419 psi | 85% | 2776 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,753 psi | 87% | 2799 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 58,566 psi | 90% | 2808 fps | 99.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,851 psi | 80% | 2756 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,081 psi | 76% | 2694 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,598 psi | 66% | 2621 fps | 99.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 56,188 psi | 86% | 2877 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,492 psi | 87% | 2710 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,572 psi | 73% | 2680 fps | 97.4% |
| Bofors RP3 | <<locked>> | 86% | 55,622 psi | 86% | 2687 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,851 psi | 80% | 2756 fps | 98.4% |
| Bofors RP7 | <<locked>> | 92% | 58,697 psi | 90% | 2726 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 82% | 58,813 psi | 90% | 2717 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 56,086 psi | 86% | 2703 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 56,811 psi | 87% | 2772 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 90% | 56,826 psi | 87% | 2736 fps | 99% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 57,261 psi | 88% | 2766 fps | 97.3% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 55,912 psi | 86% | 2746 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 82% | 57,217 psi | 88% | 2700 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,825 psi | 86% | 2703 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,421 psi | 88% | 2733 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 41,640 psi | 64% | 2648 fps | 96.5% |
| Hodgdon Superformance | <<locked>> | 92% | 57,232 psi | 88% | 2815 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,260 psi | 56% | 1644 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 58,407 psi | 90% | 2700 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,914 psi | 89% | 2671 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 57,145 psi | 88% | 2677 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,463 psi | 87% | 2671 fps | 99.6% |
| IMR 4350 | <<locked>> | 94% | 56,072 psi | 86% | 2707 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,884 psi | 88% | 2700 fps | 99.6% |
| IMR 4831 | <<locked>> | 96% | 58,682 psi | 90% | 2762 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 56,565 psi | 87% | 2717 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 58,798 psi | 90% | 2753 fps | 97.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,502 psi | 78% | 2730 fps | 96.7% |
| Lovex D073.6 | <<locked>> | 82% | 56,855 psi | 87% | 2661 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 58,769 psi | 90% | 2664 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,130 psi | 88% | 2667 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,681 psi | 87% | 2694 fps | 100% |
| Lovex S070 | <<locked>> | 94% | 58,030 psi | 89% | 2736 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,946 psi | 66% | 2530 fps | 98.6% |
| Norma 201 | <<locked>> | 84% | 58,653 psi | 90% | 2680 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,796 psi | 86% | 2628 fps | 100% |
| Norma 203B | <<locked>> | 86% | 58,175 psi | 89% | 2730 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,869 psi | 87% | 2762 fps | 98.7% |
| Norma MRPᴾ | <<locked>> | 100% | 55,288 psi | 85% | 2838 fps | 99.6% |
| Norma URP | <<locked>> | 94% | 56,840 psi | 87% | 2756 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 55,172 psi | 85% | 2703 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 50,894 psi | 78% | 2746 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 94% | 55,579 psi | 86% | 2762 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,976 psi | 69% | 2625 fps | 97.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,956 psi | 57% | 1686 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,057 psi | 86% | 2690 fps | 99.8% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,260 psi | 87% | 2756 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 56,246 psi | 87% | 2789 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 58,015 psi | 89% | 2795 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,913 psi | 88% | 2828 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,379 psi | 64% | 2638 fps | 97.6% |
| Rottweil R 902 | <<locked>> | 84% | 55,695 psi | 86% | 2635 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,477 psi | 85% | 2680 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 57,508 psi | 88% | 2740 fps | 98% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 57,899 psi | 89% | 2795 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 92% | 58,697 psi | 90% | 2726 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,681 psi | 87% | 2694 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,855 psi | 87% | 2661 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,130 psi | 88% | 2667 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 58,030 psi | 89% | 2736 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,450 psi | 88% | 2740 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,885 psi | 89% | 2700 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 58,697 psi | 90% | 2717 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,231 psi | 87% | 2569 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 57,058 psi | 88% | 2572 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,681 psi | 87% | 2654 fps | 99.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,406 psi | 88% | 2792 fps | 99% |
| Somchem S335 | <<locked>> | 82% | 55,753 psi | 86% | 2566 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,450 psi | 88% | 2684 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,666 psi | 86% | 2677 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 55,579 psi | 86% | 2684 fps | 96.9% |
| Somchem S365 | <<locked>> | 96% | 55,999 psi | 86% | 2756 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 58,262 psi | 90% | 2769 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 82% | 56,782 psi | 87% | 2549 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,057 psi | 86% | 2592 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,492 psi | 87% | 2612 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 57,188 psi | 88% | 2654 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,651 psi | 86% | 2703 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,401 psi | 78% | 2641 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 86% | 58,146 psi | 89% | 2654 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 58,320 psi | 90% | 2759 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,795 psi | 84% | 2762 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 55,695 psi | 86% | 2831 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,056 psi | 85% | 2674 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 57,159 psi | 88% | 2779 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,888 psi | 68% | 2743 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,027 psi | 85% | 2671 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,882 psi | 84% | 2713 fps | 98.5% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 49,806 psi | 77% | 2516 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,022 psi | 74% | 2530 fps | 98.1% |
| Accurate 3100 | <<locked>> | 86% | 32,024 psi | 49% | 2306 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 47,268 psi | 73% | 2523 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,824 psi | 55% | 2402 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 98% | 50,517 psi | 78% | 2753 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 53,171 psi | 82% | 2644 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,020 psi | 69% | 2503 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 40,016 psi | 62% | 2493 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 96% | 46,456 psi | 71% | 2644 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,647 psi | 76% | 2707 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,353 psi | 70% | 2526 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,646 psi | 75% | 2595 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,331 psi | 54% | 2415 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,929 psi | 61% | 2533 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 39,668 psi | 61% | 2487 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 92% | 39,595 psi | 61% | 2530 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,541 psi | 39% | 2182 fps | 96.1% |
| Alliant Reloder-25 | <<locked>> | 90% | 30,821 psi | 47% | 2343 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 82% | 29,066 psi | 45% | 2336 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,852 psi | 81% | 2661 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 41,597 psi | 64% | 2572 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 45,339 psi | 70% | 2533 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 39,595 psi | 61% | 2530 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 40,118 psi | 62% | 2418 fps | 96.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 54,984 psi | 85% | 2664 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 45,847 psi | 71% | 2546 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 37,884 psi | 58% | 2444 fps | 96.4% |
| Hodgdon H4350 | <<locked>> | 80% | 40,915 psi | 63% | 2467 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 96% | 49,966 psi | 77% | 2654 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 48,791 psi | 75% | 2635 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 53,766 psi | 83% | 2651 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,721 psi | 50% | 2313 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,372 psi | 77% | 2638 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 39,117 psi | 60% | 2589 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 36,883 psi | 57% | 2457 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,079 psi | 42% | 1470 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,314 psi | 79% | 2602 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 54,259 psi | 83% | 2625 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,355 psi | 73% | 2536 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,705 psi | 76% | 2566 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 35,926 psi | 55% | 2352 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,669 psi | 64% | 2451 fps | 97.3% |
| IMR 4831 | <<locked>> | 80% | 34,606 psi | 53% | 2359 fps | 98.1% |
| IMR 4895 | <<locked>> | 80% | 49,893 psi | 77% | 2621 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 48,617 psi | 75% | 2595 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 96% | 44,353 psi | 68% | 2618 fps | 95% |
| Lovex D073.6 | <<locked>> | 80% | 53,040 psi | 82% | 2615 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,040 psi | 80% | 2572 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,413 psi | 73% | 2530 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,117 psi | 60% | 2402 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 37,333 psi | 57% | 2382 fps | 96.5% |
| Lovex S071 | <<locked>> | 90% | 31,053 psi | 48% | 2283 fps | 95% |
| Norma 201 | <<locked>> | 80% | 51,808 psi | 80% | 2589 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,417 psi | 81% | 2582 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,993 psi | 74% | 2582 fps | 100% |
| Norma 204 | <<locked>> | 84% | 40,480 psi | 62% | 2484 fps | 95.2% |
| Norma MRP | <<locked>> | 88% | 36,303 psi | 56% | 2490 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 35,911 psi | 55% | 2402 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 80% | 48,124 psi | 74% | 2602 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 43,961 psi | 68% | 2621 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 34,635 psi | 53% | 2385 fps | 96.3% |
| Ramshot Magnum | <<locked>> | 96% | 38,812 psi | 60% | 2503 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,557 psi | 42% | 1503 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,151 psi | 71% | 2536 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,402 psi | 81% | 2703 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,525 psi | 65% | 2582 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,520 psi | 55% | 2418 fps | 98% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 34,708 psi | 53% | 2425 fps | 97.4% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 35,984 psi | 55% | 2510 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 49,153 psi | 76% | 2539 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,859 psi | 66% | 2487 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 44,382 psi | 68% | 2530 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 88% | 38,522 psi | 59% | 2467 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 40,118 psi | 62% | 2418 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,117 psi | 60% | 2402 fps | 98% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,040 psi | 82% | 2615 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,413 psi | 73% | 2530 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,333 psi | 57% | 2382 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,961 psi | 68% | 2539 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 54,056 psi | 83% | 2648 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,416 psi | 79% | 2615 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,750 psi | 81% | 2523 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,483 psi | 68% | 2402 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,290 psi | 59% | 2352 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,799 psi | 63% | 2516 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 52,446 psi | 81% | 2523 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,737 psi | 83% | 2635 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,279 psi | 67% | 2487 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 48,617 psi | 75% | 2575 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 32,198 psi | 50% | 2356 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 36,666 psi | 56% | 2402 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 53,359 psi | 82% | 2507 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,545 psi | 76% | 2507 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,893 psi | 77% | 2523 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,336 psi | 64% | 2421 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,333 psi | 57% | 2402 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 92% | 38,624 psi | 59% | 2434 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 47,877 psi | 74% | 2516 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,535 psi | 56% | 2398 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 80% | 27,949 psi | 43% | 2251 fps | 96.3% |
| Vihtavuori N560 | <<locked>> | 96% | 48,414 psi | 74% | 2710 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,419 psi | 56% | 2372 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 38,087 psi | 59% | 2451 fps | 96.5% |
| Winchester StaBALL HD | <<locked>> | 82% | 23,873 psi | 37% | 2198 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,445 psi | 79% | 2621 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 41,263 psi | 63% | 2490 fps | 95.6% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 113 powders for .280 Ackley Improved loaded with the .284 | 168gr | CutEdge MTH. Alliant Reloder-26 delivers the highest muzzle velocity at 2,877 fps; across all powders the maximum-charge window runs from 1,644 fps to 2,877 fps. Accurate 3100 gives the best case fill at 100 %, and 113 of the 113 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 168.0 gr projectile in 0.284" calls for a 1:7.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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. 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.