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:1:11.0
Load data in caliber .280 Ackley Improved with .284 | 150gr | Nosler Ballistic Tip Hunting bullet and 107 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon H4831 SC, ReloadSwiss RS 70 and Alliant Reloder-17.
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% | 56,985 psi | 88% | 2769 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 58,233 psi | 90% | 2838 fps | 98.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,764 psi | 80% | 2822 fps | 99.3% |
| Accurate 4064 | <<locked>> | 86% | 57,014 psi | 88% | 2822 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 57,972 psi | 89% | 2933 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 56,318 psi | 87% | 2854 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,290 psi | 88% | 2854 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,259 psi | 85% | 2917 fps | 97.9% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,982 psi | 82% | 2907 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 58,508 psi | 90% | 2848 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,753 psi | 87% | 2982 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 58,073 psi | 89% | 2877 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 58,465 psi | 90% | 2904 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 58,537 psi | 90% | 2986 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,086 psi | 86% | 2956 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 58,001 psi | 89% | 2959 fps | 98.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,648 psi | 79% | 2904 fps | 97.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,602 psi | 75% | 2841 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,511 psi | 65% | 2759 fps | 98.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,796 psi | 86% | 3035 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,086 psi | 86% | 2867 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,123 psi | 72% | 2822 fps | 96.3% |
| Bofors RP3 | <<locked>> | 86% | 55,288 psi | 85% | 2844 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,648 psi | 79% | 2904 fps | 97.5% |
| Bofors RP7 | <<locked>> | 92% | 58,508 psi | 90% | 2884 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 82% | 58,595 psi | 90% | 2877 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 55,854 psi | 86% | 2861 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 56,318 psi | 87% | 2927 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 90% | 56,405 psi | 87% | 2890 fps | 98.4% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,579 psi | 87% | 2910 fps | 96.3% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 55,608 psi | 86% | 2894 fps | 96% |
| Hodgdon H4895 | <<locked>> | 82% | 56,927 psi | 88% | 2861 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,129 psi | 85% | 2858 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,029 psi | 88% | 2897 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,681 psi | 87% | 2966 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,332 psi | 56% | 1762 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,870 psi | 89% | 2861 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,508 psi | 88% | 2835 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,971 psi | 88% | 2841 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,188 psi | 86% | 2825 fps | 99.1% |
| IMR 4350 | <<locked>> | 94% | 55,709 psi | 86% | 2861 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,449 psi | 87% | 2854 fps | 99.1% |
| IMR 4831 | <<locked>> | 96% | 58,131 psi | 89% | 2920 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 56,391 psi | 87% | 2877 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 58,363 psi | 90% | 2900 fps | 96.8% |
| IMR 8208 XBR | <<locked>> | 82% | 58,508 psi | 90% | 2848 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,739 psi | 87% | 2825 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 58,494 psi | 90% | 2825 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,101 psi | 88% | 2835 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,579 psi | 87% | 2851 fps | 99.8% |
| Lovex S070 | <<locked>> | 94% | 57,870 psi | 89% | 2894 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,946 psi | 66% | 2671 fps | 97.8% |
| Norma 201 | <<locked>> | 84% | 58,523 psi | 90% | 2844 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,738 psi | 86% | 2792 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,740 psi | 89% | 2887 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,362 psi | 87% | 2910 fps | 97.9% |
| Norma MRPᴾ | <<locked>> | 100% | 54,650 psi | 84% | 2986 fps | 99.1% |
| Norma URP | <<locked>> | 94% | 56,521 psi | 87% | 2913 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 58,508 psi | 90% | 2913 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 55,143 psi | 85% | 2913 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,802 psi | 69% | 2756 fps | 96.4% |
| Ramshot TAC | <<locked>> | 82% | 58,479 psi | 90% | 2874 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 82% | 58,624 psi | 90% | 2887 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,999 psi | 57% | 1804 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,912 psi | 86% | 2844 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,854 psi | 86% | 2917 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,825 psi | 86% | 2953 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,740 psi | 89% | 2953 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,362 psi | 87% | 2982 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,365 psi | 64% | 2769 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 84% | 55,709 psi | 86% | 2795 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,448 psi | 85% | 2841 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 57,058 psi | 88% | 2887 fps | 97.1% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 57,130 psi | 88% | 2943 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 92% | 58,508 psi | 90% | 2884 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,579 psi | 87% | 2851 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,739 psi | 87% | 2825 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,101 psi | 88% | 2835 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,870 psi | 89% | 2894 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 57,029 psi | 88% | 2900 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,624 psi | 89% | 2861 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 58,160 psi | 89% | 2874 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,840 psi | 86% | 2726 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,637 psi | 87% | 2726 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,304 psi | 87% | 2805 fps | 99.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,637 psi | 87% | 2936 fps | 98.3% |
| Somchem S335 | <<locked>> | 82% | 55,492 psi | 85% | 2723 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,058 psi | 88% | 2841 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,376 psi | 85% | 2835 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 55,259 psi | 85% | 2825 fps | 95.9% |
| Somchem S365 | <<locked>> | 96% | 55,622 psi | 86% | 2917 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 58,073 psi | 89% | 2923 fps | 99% |
| Vihtavuori N133 | <<locked>> | 82% | 56,362 psi | 87% | 2710 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,811 psi | 86% | 2753 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,130 psi | 86% | 2769 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,811 psi | 87% | 2812 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 58,813 psi | 90% | 2910 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,053 psi | 77% | 2785 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 86% | 57,870 psi | 89% | 2815 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,754 psi | 89% | 2913 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,317 psi | 84% | 2917 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 55,056 psi | 85% | 2976 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 58,610 psi | 90% | 2877 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,637 psi | 87% | 2933 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,932 psi | 68% | 2894 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 58,450 psi | 90% | 2881 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,505 psi | 84% | 2861 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% | 49,951 psi | 77% | 2674 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,080 psi | 74% | 2677 fps | 97.3% |
| Accurate 3100 | <<locked>> | 88% | 34,461 psi | 53% | 2490 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 47,326 psi | 73% | 2680 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,911 psi | 55% | 2539 fps | 97.5% |
| ADI AR 2206H | <<locked>> | 80% | 52,866 psi | 81% | 2802 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,730 psi | 69% | 2651 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 92% | 45,440 psi | 70% | 2743 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 98% | 49,342 psi | 76% | 2841 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,969 psi | 85% | 2795 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,226 psi | 76% | 2861 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,266 psi | 70% | 2677 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,414 psi | 74% | 2746 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,157 psi | 54% | 2546 fps | 97.6% |
| Alliant Reloder-17 | 50.5 gr | 80% | 39,639 psi | 61% | 2674 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,918 psi | 69% | 2736 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,177 psi | 65% | 2723 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 82% | 27,412 psi | 42% | 2356 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,054 psi | 51% | 2526 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 84% | 31,386 psi | 48% | 2526 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,460 psi | 81% | 2812 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 44,367 psi | 68% | 2769 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 45,455 psi | 70% | 2687 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,177 psi | 65% | 2723 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 40,234 psi | 62% | 2559 fps | 95.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 54,737 psi | 84% | 2825 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 45,861 psi | 71% | 2694 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 37,826 psi | 58% | 2582 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 82% | 43,598 psi | 67% | 2664 fps | 95.6% |
| Hodgdon H4831 | <<locked>> | 98% | 52,939 psi | 81% | 2851 fps | 95.4% |
| Hodgdon H4831 SC | 59.6 gr | 98% | 51,779 psi | 80% | 2831 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 53,490 psi | 82% | 2812 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,692 psi | 50% | 2444 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,908 psi | 77% | 2789 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 39,479 psi | 61% | 2648 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,050 psi | 42% | 1572 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,981 psi | 78% | 2759 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,853 psi | 83% | 2785 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,036 psi | 72% | 2684 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,356 psi | 76% | 2713 fps | 98.2% |
| IMR 4350 | <<locked>> | 84% | 40,727 psi | 63% | 2589 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,568 psi | 64% | 2589 fps | 96.3% |
| IMR 4831 | <<locked>> | 80% | 34,476 psi | 53% | 2490 fps | 97.2% |
| IMR 4895 | <<locked>> | 80% | 49,676 psi | 76% | 2776 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 51,503 psi | 79% | 2792 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 54,969 psi | 85% | 2795 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,910 psi | 81% | 2772 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,692 psi | 80% | 2723 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,224 psi | 73% | 2680 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,073 psi | 60% | 2539 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 37,260 psi | 57% | 2516 fps | 95.3% |
| Lovex S071 | <<locked>> | 94% | 35,476 psi | 55% | 2513 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 51,619 psi | 79% | 2743 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,286 psi | 80% | 2743 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,790 psi | 74% | 2733 fps | 100% |
| Norma 204 | <<locked>> | 88% | 46,093 psi | 71% | 2736 fps | 95.7% |
| Norma MRP | <<locked>> | 90% | 38,638 psi | 59% | 2677 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 35,694 psi | 55% | 2530 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 80% | 47,834 psi | 74% | 2753 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 80% | 34,606 psi | 53% | 2516 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 98% | 41,858 psi | 64% | 2700 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 54,795 psi | 84% | 2818 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 55,085 psi | 85% | 2838 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,499 psi | 42% | 1611 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,948 psi | 71% | 2680 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,982 psi | 80% | 2858 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,134 psi | 65% | 2730 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,592 psi | 55% | 2552 fps | 97.1% |
| ReloadSwiss RS 70 | 51.3 gr | 80% | 34,737 psi | 53% | 2556 fps | 96.2% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,595 psi | 59% | 2700 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 49,081 psi | 76% | 2697 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,699 psi | 66% | 2631 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 94% | 50,212 psi | 77% | 2776 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 92% | 44,005 psi | 68% | 2720 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 40,234 psi | 62% | 2559 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,073 psi | 60% | 2539 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,910 psi | 81% | 2772 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,224 psi | 73% | 2680 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,260 psi | 57% | 2516 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,772 psi | 67% | 2684 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,824 psi | 83% | 2802 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,140 psi | 79% | 2769 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,330 psi | 81% | 2677 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,179 psi | 68% | 2546 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,319 psi | 59% | 2484 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 43,584 psi | 67% | 2713 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 52,185 psi | 80% | 2677 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,345 psi | 82% | 2789 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,120 psi | 66% | 2631 fps | 99.8% |
| Somchem S361 | <<locked>> | 94% | 51,692 psi | 80% | 2769 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 32,256 psi | 50% | 2490 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 39,044 psi | 60% | 2589 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 52,866 psi | 81% | 2661 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,226 psi | 76% | 2661 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,458 psi | 76% | 2674 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,118 psi | 63% | 2566 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,246 psi | 57% | 2536 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 94% | 41,075 psi | 63% | 2618 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 47,834 psi | 74% | 2671 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,622 psi | 56% | 2536 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 80% | 28,021 psi | 43% | 2375 fps | 95% |
| Vihtavuori N560 | <<locked>> | 98% | 51,619 psi | 79% | 2913 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,361 psi | 56% | 2507 fps | 99.3% |
| Winchester 760 | <<locked>> | 80% | 38,014 psi | 58% | 2589 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,788 psi | 40% | 2379 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,271 psi | 79% | 2776 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 44,208 psi | 68% | 2684 fps | 95.4% |
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 107 powders for .280 Ackley Improved loaded with the .284 | 150gr | Nosler Ballistic Tip Hunting. Alliant Reloder-26 delivers the highest muzzle velocity at 3,035 fps; across all powders the maximum-charge window runs from 1,762 fps to 3,035 fps. Accurate 3100 gives the best case fill at 100 %, and 107 of the 107 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 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, 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. Hodgdon H4831 SC, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for .280 Ackley Improved with the .284 | 150gr | Nosler Ballistic Tip 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.