Load Specifications
Bullet Manufacturer:Remington
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 | Remington PSP Core-Lokt bullet and 105 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 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>> | 84% | 58,218 psi | 90% | 2792 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,840 psi | 86% | 2812 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,374 psi | 82% | 2851 fps | 99.5% |
| Accurate 4064 | <<locked>> | 86% | 58,494 psi | 90% | 2848 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,796 psi | 86% | 2907 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 55,506 psi | 85% | 2992 fps | 96% |
| ADI AR 2206H | <<locked>> | 82% | 57,348 psi | 88% | 2874 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 58,508 psi | 90% | 2881 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,782 psi | 87% | 2949 fps | 98.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,288 psi | 84% | 2940 fps | 96.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 58,117 psi | 89% | 3009 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 56,768 psi | 87% | 2943 fps | 98.3% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 56,768 psi | 87% | 2943 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,854 psi | 86% | 2854 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,275 psi | 87% | 2877 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,362 psi | 87% | 2959 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 58,001 psi | 89% | 2989 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,956 psi | 86% | 2936 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,113 psi | 82% | 2936 fps | 97.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,183 psi | 77% | 2871 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,729 psi | 67% | 2792 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 58,030 psi | 89% | 3071 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,580 psi | 89% | 2897 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,834 psi | 75% | 2858 fps | 96.9% |
| Bofors RP3 | <<locked>> | 86% | 56,913 psi | 88% | 2871 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,113 psi | 82% | 2936 fps | 97.9% |
| Bofors RP7 | <<locked>> | 90% | 56,043 psi | 86% | 2854 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 86% | 57,087 psi | 88% | 2887 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 58,015 psi | 89% | 2959 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 90% | 57,798 psi | 89% | 2920 fps | 98.7% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 58,291 psi | 90% | 2943 fps | 96.8% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 57,029 psi | 88% | 2923 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 82% | 58,044 psi | 89% | 2884 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,681 psi | 87% | 2881 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 58,653 psi | 90% | 2927 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 58,610 psi | 90% | 3002 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,376 psi | 56% | 1775 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,666 psi | 86% | 2838 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 57,972 psi | 89% | 2861 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,334 psi | 88% | 2851 fps | 99.3% |
| IMR 4350 | <<locked>> | 94% | 56,985 psi | 88% | 2887 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,798 psi | 89% | 2884 fps | 99.3% |
| IMR 4831 | <<locked>> | 94% | 56,260 psi | 87% | 2900 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,711 psi | 89% | 2907 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,217 psi | 86% | 2877 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,764 psi | 80% | 2907 fps | 96.2% |
| Lovex D073.6 | <<locked>> | 82% | 58,160 psi | 89% | 2851 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,999 psi | 86% | 2795 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 58,117 psi | 89% | 2854 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 57,928 psi | 89% | 2881 fps | 99.9% |
| Lovex S070 | <<locked>> | 92% | 55,753 psi | 86% | 2867 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,512 psi | 68% | 2703 fps | 98.3% |
| Norma 201 | <<locked>> | 82% | 56,057 psi | 86% | 2818 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,840 psi | 87% | 2815 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,564 psi | 85% | 2864 fps | 100% |
| Norma 204 | <<locked>> | 94% | 57,957 psi | 89% | 2943 fps | 98.3% |
| Norma MRPᴾ | <<locked>> | 100% | 56,492 psi | 87% | 3022 fps | 99.4% |
| Norma URP | <<locked>> | 94% | 58,044 psi | 89% | 2943 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,130 psi | 86% | 2887 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,083 psi | 80% | 2923 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 94% | 56,768 psi | 87% | 2943 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,499 psi | 72% | 2799 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,043 psi | 57% | 1814 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,014 psi | 88% | 2871 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,334 psi | 88% | 2946 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,421 psi | 88% | 2979 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,550 psi | 85% | 2930 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 57,957 psi | 89% | 3015 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,598 psi | 66% | 2808 fps | 97% |
| Rottweil R 902 | <<locked>> | 84% | 56,826 psi | 87% | 2818 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,782 psi | 87% | 2864 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 58,276 psi | 90% | 2917 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 98% | 55,027 psi | 85% | 2920 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 90% | 56,043 psi | 86% | 2854 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 57,928 psi | 89% | 2881 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 58,160 psi | 89% | 2851 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 58,117 psi | 89% | 2854 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,753 psi | 86% | 2867 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 58,523 psi | 90% | 2927 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,956 psi | 86% | 2848 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,985 psi | 88% | 2749 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 57,899 psi | 89% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,653 psi | 89% | 2831 fps | 99.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 58,581 psi | 90% | 2976 fps | 98.7% |
| Somchem S335 | <<locked>> | 82% | 56,521 psi | 87% | 2743 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 58,566 psi | 90% | 2871 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,623 psi | 87% | 2858 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 56,550 psi | 87% | 2854 fps | 96.4% |
| Somchem S365 | <<locked>> | 96% | 57,232 psi | 88% | 2943 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,014 psi | 86% | 2900 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 82% | 57,522 psi | 88% | 2730 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,029 psi | 88% | 2776 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,435 psi | 88% | 2792 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 58,291 psi | 90% | 2838 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,550 psi | 87% | 2884 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,459 psi | 79% | 2815 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 84% | 55,622 psi | 86% | 2792 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,550 psi | 85% | 2887 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,159 psi | 86% | 2949 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 56,782 psi | 87% | 3009 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,173 psi | 86% | 2851 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 58,015 psi | 89% | 2959 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,237 psi | 70% | 2927 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,144 psi | 86% | 2858 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,941 psi | 86% | 2890 fps | 98.1% |
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% | 51,271 psi | 79% | 2697 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,936 psi | 75% | 2700 fps | 97.6% |
| Accurate 3100 | <<locked>> | 88% | 35,505 psi | 55% | 2516 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 48,530 psi | 75% | 2703 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,985 psi | 57% | 2569 fps | 98% |
| Accurate MAGPRO | <<locked>> | 98% | 51,692 psi | 80% | 2927 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 53,969 psi | 83% | 2825 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,745 psi | 70% | 2674 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 43,787 psi | 67% | 2717 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 98% | 50,937 psi | 78% | 2877 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,546 psi | 78% | 2890 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,874 psi | 67% | 2717 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,874 psi | 67% | 2717 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,369 psi | 71% | 2703 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,516 psi | 76% | 2772 fps | 100% |
| Alliant Reloder-16 | 48.1 gr | 80% | 36,071 psi | 55% | 2575 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,814 psi | 63% | 2700 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,366 psi | 67% | 2710 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,598 psi | 67% | 2759 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,426 psi | 41% | 2329 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,982 psi | 52% | 2559 fps | 95.7% |
| Alliant Reloder-26 | 55.7 gr | 84% | 32,271 psi | 50% | 2556 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,650 psi | 83% | 2838 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 42,757 psi | 66% | 2740 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 46,572 psi | 72% | 2713 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,598 psi | 67% | 2759 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 41,133 psi | 63% | 2585 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 47,079 psi | 72% | 2726 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 38,943 psi | 60% | 2615 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 80% | 41,814 psi | 64% | 2631 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 96% | 50,923 psi | 78% | 2825 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,461 psi | 82% | 2867 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 54,592 psi | 84% | 2835 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,649 psi | 52% | 2474 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,256 psi | 79% | 2818 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 40,611 psi | 62% | 2680 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 42% | 1581 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,069 psi | 80% | 2782 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,124 psi | 74% | 2710 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,517 psi | 78% | 2743 fps | 98.5% |
| IMR 4350 | <<locked>> | 82% | 39,073 psi | 60% | 2562 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,482 psi | 65% | 2615 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 35,636 psi | 55% | 2523 fps | 97.6% |
| IMR 4895 | <<locked>> | 80% | 50,778 psi | 78% | 2799 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 49,487 psi | 76% | 2762 fps | 95% |
| IMR 7828 SSC | <<locked>> | 98% | 48,486 psi | 75% | 2848 fps | 95.3% |
| Lovex D073.6 | <<locked>> | 80% | 54,317 psi | 84% | 2799 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,736 psi | 81% | 2746 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,327 psi | 74% | 2707 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,987 psi | 62% | 2566 fps | 97.5% |
| Lovex S070 | <<locked>> | 80% | 38,334 psi | 59% | 2546 fps | 95.9% |
| Lovex S071 | <<locked>> | 92% | 34,360 psi | 53% | 2490 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 52,736 psi | 81% | 2769 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,417 psi | 82% | 2766 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,849 psi | 75% | 2759 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,193 psi | 68% | 2707 fps | 95.4% |
| Norma MRP | <<locked>> | 88% | 37,362 psi | 57% | 2651 fps | 95% |
| Norma URP | <<locked>> | 80% | 36,883 psi | 57% | 2562 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 80% | 49,095 psi | 76% | 2779 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,414 psi | 74% | 2858 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 35,636 psi | 55% | 2546 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 96% | 40,248 psi | 62% | 2674 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,760 psi | 43% | 1624 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,050 psi | 72% | 2707 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,490 psi | 82% | 2887 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,352 psi | 67% | 2756 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,753 psi | 57% | 2585 fps | 97.6% |
| ReloadSwiss RS 70 | 52.6 gr | 80% | 35,665 psi | 55% | 2585 fps | 96.8% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,784 psi | 61% | 2740 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 50,227 psi | 77% | 2723 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,005 psi | 68% | 2661 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 48,327 psi | 74% | 2753 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 90% | 42,250 psi | 65% | 2690 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 41,133 psi | 63% | 2585 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,987 psi | 62% | 2566 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 54,317 psi | 84% | 2799 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 48,327 psi | 74% | 2707 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,334 psi | 59% | 2546 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,991 psi | 69% | 2710 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,431 psi | 81% | 2795 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,505 psi | 82% | 2700 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,208 psi | 70% | 2569 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,175 psi | 60% | 2510 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,858 psi | 64% | 2684 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 53,243 psi | 82% | 2697 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 54,578 psi | 84% | 2812 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,222 psi | 68% | 2657 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 52,939 psi | 81% | 2799 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 33,199 psi | 51% | 2516 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 40,263 psi | 62% | 2618 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 54,041 psi | 83% | 2684 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,488 psi | 78% | 2687 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,821 psi | 78% | 2700 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,351 psi | 65% | 2592 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,203 psi | 59% | 2562 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 94% | 42,221 psi | 65% | 2648 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 49,052 psi | 75% | 2694 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,724 psi | 58% | 2562 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 29,008 psi | 45% | 2405 fps | 95.7% |
| Vihtavuori N560 | <<locked>> | 96% | 49,458 psi | 76% | 2884 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,246 psi | 57% | 2530 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 38,943 psi | 60% | 2615 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,527 psi | 41% | 2415 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,504 psi | 81% | 2805 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 42,453 psi | 65% | 2657 fps | 95% |
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 105 powders for .280 Ackley Improved loaded with the .284 | 150gr | Remington PSP Core-Lokt. Alliant Reloder-26 delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,775 fps to 3,071 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 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, Alliant Reloder-16 rank at the top here: for .280 Ackley Improved with the .284 | 150gr | Remington PSP Core-Lokt 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.