Load Specifications
Bullet:.284 | 150gr | Lapua ScenarL
Bullet Manufacturer:Lapua
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:1:10.0
Load data in caliber .280 Ackley Improved with .284 | 150gr | Lapua ScenarL bullet and 109 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-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% | 56,260 psi | 87% | 2759 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 58,044 psi | 89% | 2831 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,285 psi | 79% | 2812 fps | 99.2% |
| Accurate 4064 | <<locked>> | 86% | 56,681 psi | 87% | 2815 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 57,363 psi | 88% | 2920 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 56,057 psi | 86% | 3009 fps | 97.3% |
| ADI AR 2206H | <<locked>> | 82% | 55,680 psi | 86% | 2841 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,956 psi | 88% | 2848 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 58,552 psi | 90% | 2966 fps | 98.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 57,841 psi | 89% | 2838 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,144 psi | 86% | 2969 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 58,378 psi | 90% | 2959 fps | 98.4% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 58,378 psi | 90% | 2959 fps | 98.4% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 58,378 psi | 90% | 2959 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,725 psi | 89% | 2871 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,870 psi | 89% | 2894 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,928 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,477 psi | 85% | 2946 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,508 psi | 88% | 2949 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,879 psi | 78% | 2887 fps | 97.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,109 psi | 74% | 2831 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,090 psi | 65% | 2749 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,259 psi | 85% | 3025 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,782 psi | 86% | 2861 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,615 psi | 72% | 2808 fps | 96.1% |
| Bofors RP3 | <<locked>> | 88% | 58,624 psi | 90% | 2887 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,879 psi | 78% | 2887 fps | 97.3% |
| Bofors RP7 | <<locked>> | 92% | 57,914 psi | 89% | 2871 fps | 99% |
| Hodgdon BL-C2 | <<locked>> | 82% | 57,986 psi | 89% | 2867 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 55,274 psi | 85% | 2851 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 55,782 psi | 86% | 2917 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 90% | 55,825 psi | 86% | 2877 fps | 98.2% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,086 psi | 86% | 2897 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 82% | 56,289 psi | 87% | 2848 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 58,320 psi | 90% | 2897 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,710 psi | 87% | 2890 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,188 psi | 86% | 2956 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,245 psi | 56% | 1759 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,537 psi | 89% | 2854 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,087 psi | 88% | 2828 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,347 psi | 87% | 2831 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,593 psi | 86% | 2812 fps | 99% |
| IMR 4350 | <<locked>> | 96% | 58,798 psi | 90% | 2900 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,173 psi | 86% | 2848 fps | 99.1% |
| IMR 4831 | <<locked>> | 96% | 57,551 psi | 89% | 2910 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,709 psi | 86% | 2867 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 57,914 psi | 89% | 2890 fps | 96.7% |
| IMR 8208 XBR | <<locked>> | 82% | 57,841 psi | 89% | 2838 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,086 psi | 86% | 2815 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 58,175 psi | 89% | 2815 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,463 psi | 87% | 2822 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,028 psi | 86% | 2841 fps | 99.7% |
| Lovex S070 | <<locked>> | 94% | 57,334 psi | 88% | 2884 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,438 psi | 65% | 2657 fps | 97.7% |
| Norma 201 | <<locked>> | 84% | 57,870 psi | 89% | 2831 fps | 100% |
| Norma 202 | <<locked>> | 84% | 58,682 psi | 90% | 2828 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,116 psi | 88% | 2877 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,854 psi | 86% | 2900 fps | 97.8% |
| Norma MRPᴾ | <<locked>> | 100% | 54,143 psi | 83% | 2976 fps | 99% |
| Norma URP | <<locked>> | 94% | 55,927 psi | 86% | 2904 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 58,218 psi | 90% | 2907 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 58,508 psi | 90% | 2959 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,440 psi | 68% | 2749 fps | 96.3% |
| Ramshot TAC | <<locked>> | 82% | 58,233 psi | 90% | 2867 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 82% | 58,291 psi | 90% | 2881 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,912 psi | 57% | 1801 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,390 psi | 85% | 2835 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,187 psi | 85% | 2907 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,187 psi | 85% | 2943 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,188 psi | 88% | 2946 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,854 psi | 86% | 2972 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 58,697 psi | 90% | 2835 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 58,508 psi | 90% | 2881 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,565 psi | 87% | 2877 fps | 97% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,550 psi | 87% | 2933 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 92% | 57,914 psi | 89% | 2871 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,028 psi | 86% | 2841 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,086 psi | 86% | 2815 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,463 psi | 87% | 2822 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,334 psi | 88% | 2884 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,463 psi | 87% | 2890 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,014 psi | 88% | 2848 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,899 psi | 89% | 2867 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,477 psi | 85% | 2717 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,333 psi | 87% | 2720 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,825 psi | 86% | 2795 fps | 99.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,057 psi | 86% | 2927 fps | 98.2% |
| Somchem S335 | <<locked>> | 84% | 58,378 psi | 90% | 2759 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,811 psi | 87% | 2835 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 58,320 psi | 90% | 2874 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 58,436 psi | 90% | 2871 fps | 96.5% |
| Somchem S365 | <<locked>> | 96% | 54,998 psi | 85% | 2907 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,276 psi | 88% | 2910 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 82% | 55,985 psi | 86% | 2700 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 58,798 psi | 90% | 2789 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,782 psi | 86% | 2762 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,217 psi | 86% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 58,233 psi | 90% | 2900 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,545 psi | 76% | 2776 fps | 97.4% |
| Vihtavuori N530 | <<locked>> | 82% | 58,624 psi | 90% | 2838 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 57,305 psi | 88% | 2805 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,217 psi | 88% | 2904 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,766 psi | 83% | 2907 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,636 psi | 84% | 2963 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 58,146 psi | 89% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,072 psi | 86% | 2920 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,294 psi | 67% | 2877 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 58,146 psi | 89% | 2877 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,737 psi | 83% | 2844 fps | 97.5% |
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 2495 | <<locked>> | 80% | 49,559 psi | 76% | 2667 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,543 psi | 73% | 2664 fps | 97.1% |
| Accurate 3100 | <<locked>> | 88% | 34,011 psi | 52% | 2477 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 46,949 psi | 72% | 2674 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,389 psi | 54% | 2523 fps | 97.3% |
| Accurate High Country | <<locked>> | 96% | 48,660 psi | 75% | 2884 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 52,272 psi | 80% | 2789 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,411 psi | 68% | 2641 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 44,991 psi | 69% | 2730 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,331 psi | 84% | 2785 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,921 psi | 75% | 2854 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 45,005 psi | 69% | 2730 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 45,005 psi | 69% | 2730 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 45,005 psi | 69% | 2730 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,933 psi | 69% | 2671 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,790 psi | 74% | 2733 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,867 psi | 54% | 2536 fps | 97.4% |
| Alliant Reloder-17 | 50.1 gr | 80% | 39,334 psi | 61% | 2664 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,454 psi | 68% | 2723 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,599 psi | 69% | 2772 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 82% | 27,180 psi | 42% | 2346 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,795 psi | 54% | 2572 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 86% | 33,257 psi | 51% | 2579 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,170 psi | 80% | 2805 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 43,700 psi | 67% | 2753 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 45,136 psi | 69% | 2680 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,599 psi | 69% | 2772 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 39,900 psi | 61% | 2549 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 54,433 psi | 84% | 2818 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 45,513 psi | 70% | 2687 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 37,521 psi | 58% | 2572 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 82% | 43,294 psi | 67% | 2654 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 98% | 52,446 psi | 81% | 2838 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 52,823 psi | 81% | 2799 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,387 psi | 50% | 2438 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,574 psi | 76% | 2782 fps | 100% |
| Hodgdon Superformance | 54.3 gr | 82% | 39,233 psi | 60% | 2641 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 42% | 1572 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,662 psi | 78% | 2749 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,417 psi | 82% | 2779 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,702 psi | 72% | 2674 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,052 psi | 75% | 2703 fps | 98.1% |
| IMR 4350 | <<locked>> | 84% | 40,451 psi | 62% | 2582 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,292 psi | 64% | 2579 fps | 96.2% |
| IMR 4831 | <<locked>> | 80% | 34,156 psi | 53% | 2480 fps | 97% |
| IMR 4895 | <<locked>> | 80% | 49,023 psi | 75% | 2759 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 51,053 psi | 79% | 2779 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 54,331 psi | 84% | 2785 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,533 psi | 81% | 2766 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,372 psi | 79% | 2717 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,876 psi | 72% | 2674 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,783 psi | 60% | 2530 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 36,941 psi | 57% | 2507 fps | 95.2% |
| Lovex S071 | <<locked>> | 94% | 34,969 psi | 54% | 2500 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 51,213 psi | 79% | 2736 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,938 psi | 80% | 2736 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,166 psi | 73% | 2720 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 45,614 psi | 70% | 2723 fps | 95.5% |
| Norma MRP | <<locked>> | 90% | 38,261 psi | 59% | 2664 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 35,389 psi | 54% | 2523 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 80% | 47,529 psi | 73% | 2743 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 36,637 psi | 56% | 2562 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 98% | 41,263 psi | 63% | 2680 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 54,491 psi | 84% | 2812 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 54,520 psi | 84% | 2825 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,543 psi | 42% | 1608 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,643 psi | 70% | 2671 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,605 psi | 79% | 2851 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,814 psi | 64% | 2720 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,114 psi | 54% | 2543 fps | 96.9% |
| ReloadSwiss RS 70 | 50.9 gr | 80% | 34,490 psi | 53% | 2546 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 48,718 psi | 75% | 2687 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,351 psi | 65% | 2625 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 49,705 psi | 76% | 2766 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 92% | 43,482 psi | 67% | 2707 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 39,900 psi | 61% | 2549 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,783 psi | 60% | 2530 fps | 97% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,533 psi | 81% | 2766 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,876 psi | 72% | 2674 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,941 psi | 57% | 2507 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,439 psi | 67% | 2677 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,200 psi | 82% | 2792 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,850 psi | 78% | 2762 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,996 psi | 80% | 2671 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,830 psi | 67% | 2539 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,855 psi | 58% | 2470 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 43,076 psi | 66% | 2700 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 51,851 psi | 80% | 2671 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,069 psi | 82% | 2782 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,786 psi | 66% | 2625 fps | 99.8% |
| Somchem S361 | <<locked>> | 96% | 54,592 psi | 84% | 2812 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 31,966 psi | 49% | 2480 fps | 99.1% |
| Somchem S385 | <<locked>> | 90% | 41,394 psi | 64% | 2635 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 52,475 psi | 81% | 2654 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,805 psi | 75% | 2654 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,124 psi | 76% | 2667 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,785 psi | 63% | 2556 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,724 psi | 56% | 2523 fps | 97.6% |
| Vihtavuori N165 | <<locked>> | 94% | 40,625 psi | 63% | 2608 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 54,955 psi | 85% | 2789 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 47,500 psi | 73% | 2664 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,318 psi | 56% | 2526 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 82% | 29,733 psi | 46% | 2421 fps | 95.8% |
| Vihtavuori N560 | <<locked>> | 98% | 50,836 psi | 78% | 2897 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,114 psi | 56% | 2500 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 37,521 psi | 58% | 2572 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,599 psi | 39% | 2365 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,676 psi | 78% | 2766 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,772 psi | 67% | 2674 fps | 95.2% |
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 109 powders for .280 Ackley Improved loaded with the .284 | 150gr | Lapua ScenarL. Alliant Reloder-26 delivers the highest muzzle velocity at 3,025 fps; across all powders the maximum-charge window runs from 1,759 fps to 3,025 fps. Accurate 3100 gives the best case fill at 100 %, and 109 of the 109 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 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, ADI AR 2209 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-17 rank at the top here: for .280 Ackley Improved with the .284 | 150gr | Lapua ScenarL 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.