Load Specifications
Bullet:.284 | 157gr | CutEdge MTAC
Bullet Manufacturer:Cutting Edge
Bullet Weight:157 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 | 157gr | CutEdge MTAC 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, 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>> | 86% | 58,624 psi | 90% | 2726 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,203 psi | 88% | 2759 fps | 98.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,937 psi | 77% | 2733 fps | 99.2% |
| Accurate 4064 | <<locked>> | 86% | 55,303 psi | 85% | 2733 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,405 psi | 87% | 2844 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 58,740 psi | 90% | 2822 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,347 psi | 87% | 2776 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 57,609 psi | 89% | 2887 fps | 98.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 51,648 psi | 79% | 2818 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 57,348 psi | 88% | 2762 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,361 psi | 85% | 2894 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,695 psi | 87% | 2792 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,116 psi | 88% | 2818 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,348 psi | 88% | 2900 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,868 psi | 84% | 2874 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 56,579 psi | 87% | 2871 fps | 98.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,169 psi | 77% | 2818 fps | 97.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,253 psi | 73% | 2756 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,089 psi | 63% | 2674 fps | 98.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,172 psi | 83% | 2946 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,969 psi | 85% | 2785 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 45,832 psi | 71% | 2736 fps | 96.3% |
| Bofors RP3 | <<locked>> | 88% | 57,537 psi | 89% | 2808 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,169 psi | 77% | 2818 fps | 97.5% |
| Bofors RP7 | <<locked>> | 92% | 57,087 psi | 88% | 2795 fps | 99.1% |
| Hodgdon Benchmark | <<locked>> | 82% | 58,668 psi | 90% | 2743 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 57,246 psi | 88% | 2795 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 58,276 psi | 90% | 2831 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 55,129 psi | 85% | 2844 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 90% | 55,158 psi | 85% | 2805 fps | 98.4% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 55,274 psi | 85% | 2825 fps | 96.3% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 54,288 psi | 84% | 2808 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 82% | 55,666 psi | 86% | 2776 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 57,377 psi | 88% | 2818 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,767 psi | 86% | 2812 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,347 psi | 85% | 2884 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,216 psi | 56% | 1709 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,840 psi | 87% | 2779 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,318 psi | 87% | 2753 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,579 psi | 86% | 2753 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 58,639 psi | 90% | 2795 fps | 99.5% |
| IMR 4350 | <<locked>> | 96% | 57,986 psi | 89% | 2828 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,434 psi | 85% | 2772 fps | 99.2% |
| IMR 4831 | <<locked>> | 96% | 56,855 psi | 87% | 2835 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 58,624 psi | 90% | 2841 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 57,014 psi | 88% | 2815 fps | 96.8% |
| IMR 8208 XBR | <<locked>> | 82% | 57,348 psi | 88% | 2762 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,056 psi | 85% | 2740 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,392 psi | 88% | 2740 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,825 psi | 86% | 2749 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 58,813 psi | 90% | 2818 fps | 99.9% |
| Lovex S070 | <<locked>> | 94% | 56,492 psi | 87% | 2808 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,423 psi | 64% | 2585 fps | 97.8% |
| Norma 201 | <<locked>> | 84% | 57,130 psi | 88% | 2759 fps | 100% |
| Norma 202 | <<locked>> | 84% | 58,073 psi | 89% | 2756 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,333 psi | 87% | 2802 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,100 psi | 85% | 2828 fps | 98% |
| Norma MRPᴾ | <<locked>> | 100% | 53,258 psi | 82% | 2900 fps | 99.1% |
| Norma URP | <<locked>> | 96% | 58,755 psi | 90% | 2881 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 57,450 psi | 88% | 2831 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 57,493 psi | 88% | 2884 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 43,569 psi | 67% | 2677 fps | 96.4% |
| Ramshot TAC | <<locked>> | 82% | 57,406 psi | 88% | 2795 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 82% | 57,392 psi | 88% | 2805 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,608 psi | 56% | 1745 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 58,204 psi | 90% | 2815 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 58,233 psi | 90% | 2884 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 58,421 psi | 90% | 2920 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,289 psi | 87% | 2867 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 58,813 psi | 90% | 2953 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 57,653 psi | 89% | 2730 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 57,638 psi | 89% | 2756 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 57,696 psi | 89% | 2805 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,825 psi | 86% | 2805 fps | 97.2% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,825 psi | 86% | 2861 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 92% | 57,087 psi | 88% | 2795 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 58,813 psi | 90% | 2818 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,056 psi | 85% | 2740 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,825 psi | 86% | 2749 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,492 psi | 87% | 2808 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,666 psi | 86% | 2815 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,304 psi | 87% | 2776 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,942 psi | 88% | 2789 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 58,204 psi | 90% | 2690 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,550 psi | 85% | 2648 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,013 psi | 85% | 2723 fps | 99.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,332 psi | 85% | 2854 fps | 98.3% |
| Somchem S335 | <<locked>> | 84% | 57,740 psi | 89% | 2687 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,912 psi | 86% | 2759 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 57,595 psi | 89% | 2802 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 57,682 psi | 89% | 2799 fps | 96.7% |
| Somchem S365 | <<locked>> | 98% | 58,001 psi | 89% | 2881 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 56,507 psi | 87% | 2838 fps | 99% |
| Vihtavuori N133 | <<locked>> | 84% | 58,697 psi | 90% | 2671 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 58,102 psi | 89% | 2717 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 58,682 psi | 90% | 2736 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,579 psi | 86% | 2730 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 57,595 psi | 89% | 2825 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,559 psi | 75% | 2700 fps | 97.5% |
| Vihtavuori N530 | <<locked>> | 82% | 57,783 psi | 89% | 2762 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 56,637 psi | 87% | 2733 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,246 psi | 87% | 2828 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,765 psi | 81% | 2831 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 53,780 psi | 83% | 2890 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 57,290 psi | 88% | 2795 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 58,508 psi | 90% | 2812 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,129 psi | 85% | 2844 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,308 psi | 65% | 2802 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 57,246 psi | 88% | 2799 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,156 psi | 82% | 2779 fps | 97.7% |
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% | 48,124 psi | 74% | 2589 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,688 psi | 72% | 2592 fps | 97.2% |
| Accurate 3100 | <<locked>> | 88% | 32,938 psi | 51% | 2405 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 45,629 psi | 70% | 2592 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,345 psi | 53% | 2451 fps | 97.4% |
| ADI AR 2206H | <<locked>> | 80% | 51,532 psi | 79% | 2713 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,932 psi | 68% | 2575 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 92% | 44,237 psi | 68% | 2661 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 98% | 48,211 psi | 74% | 2759 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,679 psi | 83% | 2713 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,196 psi | 74% | 2779 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,077 psi | 68% | 2598 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,021 psi | 72% | 2661 fps | 99.9% |
| Alliant Reloder-16 | 45.2 gr | 80% | 34,098 psi | 52% | 2467 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,508 psi | 59% | 2592 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 43,729 psi | 67% | 2654 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 96% | 43,685 psi | 67% | 2700 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,339 psi | 41% | 2277 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,011 psi | 52% | 2503 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 86% | 32,343 psi | 50% | 2507 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,488 psi | 79% | 2736 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 43,062 psi | 66% | 2684 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 43,903 psi | 68% | 2602 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 43,685 psi | 67% | 2700 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 39,073 psi | 60% | 2477 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 55,013 psi | 85% | 2694 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,548 psi | 82% | 2743 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,498 psi | 68% | 2612 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 36,593 psi | 56% | 2500 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 82% | 42,496 psi | 65% | 2582 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 98% | 51,822 psi | 80% | 2772 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 98% | 50,618 psi | 78% | 2753 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 52,069 psi | 80% | 2723 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,517 psi | 48% | 2365 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,747 psi | 75% | 2707 fps | 100% |
| Hodgdon Superformance | 52.8 gr | 82% | 38,435 psi | 59% | 2572 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,803 psi | 41% | 1522 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,053 psi | 77% | 2677 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,823 psi | 81% | 2707 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,195 psi | 71% | 2608 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,457 psi | 75% | 2635 fps | 98.2% |
| IMR 4350 | <<locked>> | 84% | 39,697 psi | 61% | 2513 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,640 psi | 63% | 2513 fps | 96.4% |
| IMR 4831 | <<locked>> | 80% | 33,257 psi | 51% | 2411 fps | 97.1% |
| IMR 4895 | <<locked>> | 80% | 48,269 psi | 74% | 2687 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 50,256 psi | 77% | 2710 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 53,679 psi | 83% | 2713 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,416 psi | 79% | 2687 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,952 psi | 78% | 2648 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,224 psi | 71% | 2605 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,869 psi | 58% | 2461 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 36,042 psi | 55% | 2438 fps | 95.3% |
| Lovex S071 | <<locked>> | 94% | 33,953 psi | 52% | 2431 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 50,285 psi | 77% | 2661 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,126 psi | 79% | 2661 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,383 psi | 71% | 2648 fps | 100% |
| Norma 204 | <<locked>> | 88% | 44,817 psi | 69% | 2651 fps | 95.7% |
| Norma MRP | <<locked>> | 90% | 37,434 psi | 58% | 2595 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 34,548 psi | 53% | 2451 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 80% | 46,789 psi | 72% | 2671 fps | 100% |
| Ramshot Hunter | <<locked>> | 80% | 33,475 psi | 51% | 2434 fps | 95% |
| Ramshot Magnum | <<locked>> | 98% | 40,321 psi | 62% | 2612 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 53,882 psi | 83% | 2740 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 53,766 psi | 83% | 2753 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,238 psi | 42% | 1558 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,788 psi | 69% | 2598 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,676 psi | 78% | 2772 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,988 psi | 63% | 2648 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,113 psi | 52% | 2467 fps | 97% |
| ReloadSwiss RS 70 | 49.5 gr | 80% | 33,707 psi | 52% | 2477 fps | 96.2% |
| Rottweil R 901 | <<locked>> | 80% | 54,317 psi | 84% | 2684 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 48,008 psi | 74% | 2618 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,307 psi | 64% | 2549 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 94% | 49,023 psi | 75% | 2697 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 92% | 42,627 psi | 66% | 2635 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 39,073 psi | 60% | 2477 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,869 psi | 58% | 2461 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,416 psi | 79% | 2687 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,224 psi | 71% | 2605 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,042 psi | 55% | 2438 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,540 psi | 65% | 2602 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,388 psi | 81% | 2717 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,980 psi | 77% | 2687 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,387 psi | 79% | 2598 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,236 psi | 67% | 2470 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,014 psi | 57% | 2402 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,221 psi | 65% | 2628 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 50,995 psi | 78% | 2598 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,344 psi | 81% | 2710 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,858 psi | 64% | 2552 fps | 99.8% |
| Somchem S361 | <<locked>> | 94% | 50,328 psi | 77% | 2687 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 31,067 psi | 48% | 2408 fps | 99.1% |
| Somchem S385 | <<locked>> | 90% | 40,437 psi | 62% | 2562 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 51,967 psi | 80% | 2585 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,051 psi | 74% | 2582 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,341 psi | 74% | 2595 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,943 psi | 61% | 2484 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 35,940 psi | 55% | 2454 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 94% | 39,900 psi | 61% | 2543 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 54,012 psi | 83% | 2710 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 46,572 psi | 72% | 2589 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,331 psi | 54% | 2454 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 82% | 28,732 psi | 44% | 2349 fps | 95.8% |
| Vihtavuori N560 | <<locked>> | 98% | 49,966 psi | 77% | 2825 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,375 psi | 54% | 2431 fps | 99.3% |
| Winchester 748 | <<locked>> | 80% | 54,723 psi | 84% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 36,796 psi | 57% | 2503 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,281 psi | 40% | 2356 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,140 psi | 77% | 2697 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 42,888 psi | 66% | 2605 fps | 95.3% |
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 110 powders for .280 Ackley Improved loaded with the .284 | 157gr | CutEdge MTAC. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,953 fps; across all powders the maximum-charge window runs from 1,709 fps to 2,953 fps. Accurate 3100 gives the best case fill at 100 %, and 110 of the 110 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 157.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, 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. ReloadSwiss RS 70, Hodgdon Superformance, Alliant Reloder-16 rank at the top here: for .280 Ackley Improved with the .284 | 157gr | CutEdge MTAC 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.