Load Specifications
Bullet Manufacturer:Berger
Bullet Weight:140 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:1:10.5
Load data in caliber .280 Ackley Improved with .284 | 140gr | Berger VLD Hunting bullet and 104 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-16 and Hodgdon Superformance.
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% | 58,363 psi | 90% | 2854 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 58,349 psi | 90% | 2887 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 56,304 psi | 87% | 2900 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,110 psi | 76% | 2867 fps | 98.4% |
| Accurate 4064 | <<locked>> | 88% | 58,523 psi | 90% | 2943 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 55,303 psi | 85% | 2989 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 57,725 psi | 89% | 2972 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 58,697 psi | 90% | 2972 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 56,478 psi | 87% | 3025 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,478 psi | 87% | 2917 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 57,972 psi | 89% | 2884 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 58,131 psi | 89% | 3104 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,738 psi | 86% | 2943 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,188 psi | 86% | 2966 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 56,043 psi | 86% | 3048 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 57,464 psi | 88% | 3077 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,448 psi | 85% | 3012 fps | 97.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,066 psi | 75% | 2946 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,209 psi | 71% | 2890 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,524 psi | 62% | 2795 fps | 97.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,765 psi | 81% | 3081 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 57,827 psi | 89% | 2989 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 56,724 psi | 87% | 2963 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,066 psi | 75% | 2946 fps | 96.2% |
| Bofors RP7 | <<locked>> | 92% | 56,173 psi | 86% | 2936 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 57,653 psi | 89% | 2894 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 56,246 psi | 87% | 2946 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 57,363 psi | 88% | 2979 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 94% | 57,769 psi | 89% | 3045 fps | 99% |
| Hodgdon H4350 | <<locked>> | 92% | 57,769 psi | 89% | 3002 fps | 98% |
| Hodgdon H4895 | <<locked>> | 84% | 58,378 psi | 90% | 2982 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,275 psi | 87% | 2969 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 58,407 psi | 90% | 3015 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 58,218 psi | 90% | 3084 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,013 psi | 55% | 1824 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,782 psi | 86% | 2930 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,303 psi | 85% | 2907 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 58,146 psi | 89% | 2956 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 57,667 psi | 89% | 2940 fps | 98.9% |
| IMR 4350 | <<locked>> | 96% | 57,014 psi | 88% | 2969 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 58,001 psi | 89% | 2969 fps | 98.9% |
| IMR 4831 | <<locked>> | 96% | 55,593 psi | 86% | 2979 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 57,667 psi | 89% | 2995 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 56,478 psi | 87% | 2917 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 57,972 psi | 89% | 2943 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,608 psi | 87% | 2894 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 58,494 psi | 90% | 2949 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 57,696 psi | 89% | 2963 fps | 99.6% |
| Lovex S070 | <<locked>> | 94% | 55,680 psi | 86% | 2953 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,785 psi | 63% | 2713 fps | 96.6% |
| Norma 201 | <<locked>> | 84% | 56,449 psi | 87% | 2913 fps | 100% |
| Norma 202 | <<locked>> | 84% | 57,174 psi | 88% | 2913 fps | 100% |
| Norma 203B | <<locked>> | 86% | 55,477 psi | 85% | 2953 fps | 100% |
| Norma 204 | <<locked>> | 96% | 57,914 psi | 89% | 3025 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 52,040 psi | 80% | 3035 fps | 98.2% |
| Norma URP | <<locked>> | 96% | 57,754 psi | 89% | 3031 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 56,173 psi | 86% | 2979 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 56,420 psi | 87% | 3028 fps | 99.4% |
| Ramshot TAC | <<locked>> | 82% | 56,594 psi | 87% | 2940 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,594 psi | 87% | 2959 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,622 psi | 56% | 1867 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 57,406 psi | 88% | 2963 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 57,290 psi | 88% | 3041 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 56,956 psi | 88% | 3071 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,955 psi | 85% | 3012 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 57,638 psi | 89% | 3097 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 57,276 psi | 88% | 2890 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 56,898 psi | 88% | 2910 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,536 psi | 87% | 2953 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 58,349 psi | 90% | 2995 fps | 96.7% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 54,723 psi | 84% | 2999 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 92% | 56,173 psi | 86% | 2936 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 57,696 psi | 89% | 2963 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 84% | 57,972 psi | 89% | 2943 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 58,494 psi | 90% | 2949 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,680 psi | 86% | 2953 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 58,320 psi | 90% | 3015 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,288 psi | 85% | 2917 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,275 psi | 87% | 2943 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 57,406 psi | 88% | 2844 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 58,218 psi | 90% | 2844 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 57,885 psi | 89% | 2917 fps | 98.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,230 psi | 83% | 2992 fps | 97.3% |
| Somchem S335 | <<locked>> | 84% | 57,029 psi | 88% | 2841 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,085 psi | 85% | 2907 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 56,565 psi | 87% | 2949 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 56,521 psi | 87% | 3028 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,361 psi | 85% | 2972 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 84% | 57,769 psi | 89% | 2825 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 57,290 psi | 88% | 2874 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,522 psi | 88% | 2887 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 58,334 psi | 90% | 2930 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 56,391 psi | 87% | 2969 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 47,630 psi | 73% | 2828 fps | 96.2% |
| Vihtavuori N530 | <<locked>> | 82% | 56,826 psi | 87% | 2913 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 55,695 psi | 86% | 2881 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 55,332 psi | 85% | 2972 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,576 psi | 79% | 2972 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,072 psi | 86% | 2936 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 57,421 psi | 88% | 2966 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 57,769 psi | 89% | 3045 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,626 psi | 64% | 2930 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 56,333 psi | 87% | 2949 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 51,895 psi | 80% | 2904 fps | 96.5% |
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% | 54,824 psi | 84% | 2805 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 47,979 psi | 74% | 2743 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,282 psi | 71% | 2730 fps | 96.1% |
| Accurate 3100 | <<locked>> | 92% | 37,478 psi | 58% | 2638 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 45,382 psi | 70% | 2743 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,953 psi | 52% | 2575 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 80% | 50,749 psi | 78% | 2861 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,178 psi | 66% | 2707 fps | 99% |
| ADI AR 2209 | <<locked>> | 94% | 46,528 psi | 72% | 2848 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,808 psi | 81% | 2861 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 54,563 psi | 84% | 2838 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,079 psi | 72% | 2917 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,540 psi | 67% | 2736 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,325 psi | 71% | 2799 fps | 99.5% |
| Alliant Reloder-16 | 47.5 gr | 80% | 33,765 psi | 52% | 2592 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,826 psi | 58% | 2720 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 94% | 45,847 psi | 71% | 2838 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 98% | 45,977 psi | 71% | 2887 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 84% | 27,920 psi | 43% | 2444 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 96% | 35,795 psi | 55% | 2674 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 88% | 34,156 psi | 53% | 2680 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,618 psi | 78% | 2877 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 43,555 psi | 67% | 2743 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 45,977 psi | 71% | 2887 fps | 95.3% |
| Bofors RP7 | <<locked>> | 84% | 43,729 psi | 67% | 2717 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 54,273 psi | 83% | 2844 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,562 psi | 81% | 2890 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,019 psi | 68% | 2749 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 84% | 41,307 psi | 64% | 2743 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 84% | 44,556 psi | 69% | 2766 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 51,271 psi | 79% | 2871 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,256 psi | 48% | 2487 fps | 97% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,819 psi | 74% | 2851 fps | 100% |
| Hodgdon Superformance | 58.1 gr | 86% | 43,598 psi | 67% | 2822 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,876 psi | 41% | 1631 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,197 psi | 76% | 2825 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 51,764 psi | 80% | 2858 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,397 psi | 70% | 2743 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,703 psi | 73% | 2769 fps | 97.2% |
| IMR 4350 | <<locked>> | 86% | 41,611 psi | 64% | 2694 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,118 psi | 62% | 2641 fps | 95.1% |
| IMR 4831 | <<locked>> | 80% | 32,880 psi | 51% | 2533 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 47,485 psi | 73% | 2831 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 52,808 psi | 81% | 2861 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,778 psi | 78% | 2838 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,067 psi | 77% | 2789 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 45,513 psi | 70% | 2746 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,579 psi | 58% | 2589 fps | 95.9% |
| Lovex S070 | <<locked>> | 84% | 40,553 psi | 62% | 2671 fps | 95.6% |
| Lovex S071 | <<locked>> | 98% | 38,363 psi | 59% | 2661 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 49,806 psi | 77% | 2808 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,430 psi | 78% | 2812 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,701 psi | 70% | 2789 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 47,123 psi | 72% | 2841 fps | 95.2% |
| Norma MRP | <<locked>> | 94% | 42,351 psi | 65% | 2844 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 34,098 psi | 52% | 2575 fps | 96% |
| Ramshot Big Game | <<locked>> | 80% | 45,759 psi | 70% | 2805 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 37,956 psi | 58% | 2677 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 53,040 psi | 82% | 2884 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,953 psi | 81% | 2900 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,282 psi | 42% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,150 psi | 68% | 2730 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,690 psi | 76% | 2917 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,219 psi | 62% | 2782 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,779 psi | 52% | 2592 fps | 95.6% |
| ReloadSwiss RS 70 | 53.2 gr | 82% | 35,549 psi | 55% | 2654 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 53,838 psi | 83% | 2841 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,413 psi | 73% | 2759 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,872 psi | 63% | 2687 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 96% | 51,372 psi | 79% | 2884 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 94% | 44,628 psi | 69% | 2818 fps | 95% |
| Rottweil R 907 | <<locked>> | 84% | 43,729 psi | 67% | 2717 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,579 psi | 58% | 2589 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,778 psi | 78% | 2838 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,513 psi | 70% | 2746 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 40,553 psi | 62% | 2671 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,887 psi | 64% | 2736 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,692 psi | 80% | 2861 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,255 psi | 76% | 2831 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,734 psi | 78% | 2749 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,670 psi | 66% | 2612 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,320 psi | 60% | 2585 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 47,500 psi | 73% | 2874 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 50,473 psi | 78% | 2749 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,474 psi | 79% | 2854 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,481 psi | 64% | 2690 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 30,719 psi | 47% | 2530 fps | 98.2% |
| Somchem S385 | <<locked>> | 92% | 42,641 psi | 66% | 2746 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 51,198 psi | 79% | 2736 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,384 psi | 73% | 2730 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,688 psi | 73% | 2743 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,494 psi | 61% | 2618 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 35,404 psi | 54% | 2575 fps | 96.5% |
| Vihtavuori N165 | <<locked>> | 98% | 44,643 psi | 69% | 2772 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 53,330 psi | 82% | 2864 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 46,050 psi | 71% | 2733 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,998 psi | 54% | 2579 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 84% | 30,400 psi | 47% | 2523 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,969 psi | 54% | 2552 fps | 98.5% |
| Winchester 748 | <<locked>> | 80% | 53,635 psi | 83% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 41,524 psi | 64% | 2749 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 88% | 28,050 psi | 43% | 2530 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,197 psi | 76% | 2838 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 48,501 psi | 75% | 2848 fps | 95.7% |
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 104 powders for .280 Ackley Improved loaded with the .284 | 140gr | Berger VLD Hunting. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,104 fps; across all powders the maximum-charge window runs from 1,824 fps to 3,104 fps. Accurate 3100 gives the best case fill at 100 %, and 104 of the 104 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 140.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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-16, Hodgdon Superformance rank at the top here: for .280 Ackley Improved with the .284 | 140gr | Berger VLD Hunting 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.