Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:150 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:1:12.0
Load data in caliber .280 Ackley Improved with .284 | 150gr | Nosler SP SolBase bullet and 103 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-26 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 2495 | <<locked>> | 84% | 58,450 psi | 90% | 2795 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,014 psi | 86% | 2818 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,838 psi | 83% | 2861 fps | 99.5% |
| Accurate 4064 | <<locked>> | 86% | 58,740 psi | 90% | 2851 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,985 psi | 86% | 2910 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 55,927 psi | 86% | 2999 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 82% | 57,580 psi | 89% | 2881 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 58,711 psi | 90% | 2884 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,942 psi | 88% | 2953 fps | 98.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,433 psi | 84% | 2943 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 58,334 psi | 90% | 3012 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,057 psi | 86% | 2858 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,492 psi | 87% | 2881 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,550 psi | 87% | 2966 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 58,189 psi | 90% | 2992 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,101 psi | 86% | 2940 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,287 psi | 82% | 2940 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,357 psi | 77% | 2874 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,830 psi | 67% | 2795 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 58,233 psi | 90% | 3074 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,769 psi | 89% | 2900 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,950 psi | 75% | 2864 fps | 97% |
| Bofors RP3 | <<locked>> | 86% | 57,130 psi | 88% | 2877 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,287 psi | 82% | 2940 fps | 98% |
| Bofors RP7 | <<locked>> | 90% | 56,217 psi | 86% | 2858 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 86% | 57,276 psi | 88% | 2894 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 58,247 psi | 90% | 2966 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 90% | 57,957 psi | 89% | 2923 fps | 98.7% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 58,450 psi | 90% | 2946 fps | 96.8% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 57,145 psi | 88% | 2927 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 82% | 58,218 psi | 90% | 2887 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,855 psi | 87% | 2887 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,071 psi | 85% | 2877 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 58,755 psi | 90% | 3005 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,463 psi | 56% | 1778 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,564 psi | 85% | 2835 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 58,189 psi | 90% | 2867 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,537 psi | 89% | 2854 fps | 99.4% |
| IMR 4350 | <<locked>> | 94% | 57,203 psi | 88% | 2890 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,972 psi | 89% | 2887 fps | 99.4% |
| IMR 4831 | <<locked>> | 94% | 56,420 psi | 87% | 2904 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,928 psi | 89% | 2910 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,318 psi | 87% | 2881 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,851 psi | 80% | 2910 fps | 96.2% |
| Lovex D073.6 | <<locked>> | 82% | 58,392 psi | 90% | 2854 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 56,217 psi | 86% | 2802 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 58,349 psi | 90% | 2858 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 58,131 psi | 89% | 2884 fps | 99.9% |
| Lovex S070 | <<locked>> | 92% | 55,912 psi | 86% | 2874 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,643 psi | 69% | 2710 fps | 98.3% |
| Norma 201 | <<locked>> | 82% | 56,275 psi | 87% | 2822 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,087 psi | 88% | 2818 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,782 psi | 86% | 2867 fps | 100% |
| Norma 204 | <<locked>> | 94% | 58,146 psi | 89% | 2946 fps | 98.4% |
| Norma MRPᴾ | <<locked>> | 100% | 56,927 psi | 88% | 3028 fps | 99.5% |
| Norma URP | <<locked>> | 94% | 58,204 psi | 90% | 2946 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,318 psi | 87% | 2890 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,199 psi | 80% | 2927 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 94% | 56,898 psi | 88% | 2946 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,586 psi | 72% | 2802 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,115 psi | 57% | 1818 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,188 psi | 88% | 2877 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,566 psi | 89% | 2953 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,653 psi | 89% | 2986 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,709 psi | 86% | 2933 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 58,073 psi | 89% | 3018 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,902 psi | 66% | 2815 fps | 97.1% |
| Rottweil R 902 | <<locked>> | 84% | 57,029 psi | 88% | 2825 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,985 psi | 88% | 2867 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 58,726 psi | 90% | 2927 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 98% | 55,506 psi | 85% | 2927 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 90% | 56,217 psi | 86% | 2858 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 58,131 psi | 89% | 2884 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 58,392 psi | 90% | 2854 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 58,349 psi | 90% | 2858 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,912 psi | 86% | 2874 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 58,697 psi | 90% | 2930 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,159 psi | 86% | 2854 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,232 psi | 88% | 2753 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 58,102 psi | 89% | 2756 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,812 psi | 89% | 2838 fps | 99.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 58,740 psi | 90% | 2979 fps | 98.7% |
| Somchem S335 | <<locked>> | 82% | 56,739 psi | 87% | 2749 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 58,755 psi | 90% | 2874 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,826 psi | 87% | 2864 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 56,985 psi | 88% | 2864 fps | 96.5% |
| Somchem S365 | <<locked>> | 96% | 57,754 psi | 89% | 2949 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,115 psi | 86% | 2904 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 82% | 57,725 psi | 89% | 2733 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,305 psi | 88% | 2779 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,653 psi | 89% | 2799 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 58,465 psi | 90% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,797 psi | 87% | 2887 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,880 psi | 80% | 2822 fps | 98% |
| Vihtavuori N540 | <<locked>> | 84% | 55,825 psi | 86% | 2795 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,738 psi | 86% | 2894 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,608 psi | 87% | 2956 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 57,203 psi | 88% | 3018 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,318 psi | 87% | 2854 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 58,508 psi | 90% | 2969 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,614 psi | 70% | 2933 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,347 psi | 87% | 2861 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,420 psi | 87% | 2900 fps | 98.2% |
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% | 51,488 psi | 79% | 2700 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,110 psi | 76% | 2707 fps | 97.6% |
| Accurate 3100 | <<locked>> | 86% | 33,417 psi | 51% | 2470 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 48,791 psi | 75% | 2710 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,188 psi | 57% | 2572 fps | 98% |
| Accurate MAGPRO | <<locked>> | 98% | 52,141 psi | 80% | 2936 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 54,215 psi | 83% | 2828 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,948 psi | 71% | 2680 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 43,947 psi | 68% | 2723 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 98% | 51,039 psi | 79% | 2884 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,763 psi | 78% | 2897 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,557 psi | 72% | 2707 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,690 psi | 76% | 2776 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,274 psi | 56% | 2582 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,017 psi | 63% | 2707 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,511 psi | 67% | 2717 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,743 psi | 67% | 2766 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,571 psi | 41% | 2333 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,098 psi | 52% | 2566 fps | 95.8% |
| Alliant Reloder-26 | 56 gr | 84% | 32,561 psi | 50% | 2566 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,838 psi | 83% | 2841 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 42,931 psi | 66% | 2746 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 46,804 psi | 72% | 2717 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,743 psi | 67% | 2766 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 41,292 psi | 64% | 2589 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 47,297 psi | 73% | 2730 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 39,146 psi | 60% | 2618 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 80% | 41,989 psi | 65% | 2638 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 96% | 51,097 psi | 79% | 2828 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 49,995 psi | 77% | 2812 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 54,795 psi | 84% | 2838 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,837 psi | 52% | 2477 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,488 psi | 79% | 2822 fps | 100% |
| Hodgdon Superformance | 55 gr | 80% | 38,072 psi | 59% | 2625 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,195 psi | 42% | 1585 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,286 psi | 80% | 2789 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,327 psi | 74% | 2717 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,720 psi | 78% | 2746 fps | 98.6% |
| IMR 4350 | <<locked>> | 82% | 39,247 psi | 60% | 2566 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,641 psi | 66% | 2621 fps | 96.8% |
| IMR 4831 | <<locked>> | 80% | 35,607 psi | 55% | 2523 fps | 97.7% |
| IMR 4895 | <<locked>> | 80% | 50,981 psi | 78% | 2805 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 49,661 psi | 76% | 2769 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 98% | 48,646 psi | 75% | 2851 fps | 95.4% |
| Lovex D073.6 | <<locked>> | 80% | 54,549 psi | 84% | 2802 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,910 psi | 81% | 2753 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,573 psi | 75% | 2713 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,147 psi | 62% | 2572 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 38,305 psi | 59% | 2549 fps | 95.9% |
| Lovex S071 | <<locked>> | 92% | 34,534 psi | 53% | 2497 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 52,924 psi | 81% | 2772 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,664 psi | 83% | 2772 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,052 psi | 75% | 2762 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,353 psi | 68% | 2710 fps | 95.5% |
| Norma MRP | <<locked>> | 88% | 37,492 psi | 58% | 2657 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 36,869 psi | 57% | 2566 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 80% | 49,284 psi | 76% | 2782 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,544 psi | 75% | 2861 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 35,824 psi | 55% | 2549 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 96% | 40,364 psi | 62% | 2677 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,644 psi | 43% | 1624 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,239 psi | 73% | 2713 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,722 psi | 83% | 2894 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,555 psi | 67% | 2762 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,738 psi | 57% | 2585 fps | 97.6% |
| ReloadSwiss RS 70 | 52.8 gr | 80% | 35,810 psi | 55% | 2592 fps | 96.9% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,885 psi | 61% | 2743 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 50,444 psi | 78% | 2726 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,990 psi | 68% | 2664 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 48,472 psi | 75% | 2756 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 90% | 42,424 psi | 65% | 2694 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 41,292 psi | 64% | 2589 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,147 psi | 62% | 2572 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 54,549 psi | 84% | 2802 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 48,573 psi | 75% | 2713 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,305 psi | 59% | 2549 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,194 psi | 70% | 2717 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,576 psi | 81% | 2802 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,737 psi | 83% | 2707 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,440 psi | 70% | 2575 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,363 psi | 61% | 2516 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 42,018 psi | 65% | 2690 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 53,476 psi | 82% | 2703 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 54,781 psi | 84% | 2818 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,396 psi | 68% | 2664 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 53,098 psi | 82% | 2802 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 33,388 psi | 51% | 2523 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 40,422 psi | 62% | 2625 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 54,288 psi | 84% | 2690 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,734 psi | 78% | 2690 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,749 psi | 78% | 2700 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,308 psi | 65% | 2592 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,377 psi | 59% | 2569 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 92% | 39,755 psi | 61% | 2598 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 49,226 psi | 76% | 2697 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,898 psi | 58% | 2569 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 29,167 psi | 45% | 2408 fps | 95.8% |
| Vihtavuori N560 | <<locked>> | 96% | 49,850 psi | 77% | 2894 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,391 psi | 58% | 2536 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 39,146 psi | 60% | 2618 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,048 psi | 39% | 2356 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,707 psi | 81% | 2808 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 42,627 psi | 66% | 2664 fps | 95.1% |
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 103 powders for .280 Ackley Improved loaded with the .284 | 150gr | Nosler SP SolBase. Alliant Reloder-26 delivers the highest muzzle velocity at 3,074 fps; across all powders the maximum-charge window runs from 1,778 fps to 3,074 fps. Accurate 3100 gives the best case fill at 100 %, and 103 of the 103 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 150.0 gr projectile in 0.284" calls for a 1:12.0 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. ReloadSwiss RS 70, Alliant Reloder-26, Hodgdon Superformance rank at the top here: for .280 Ackley Improved with the .284 | 150gr | Nosler SP SolBase 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.