Load Specifications
Bullet:.243 | 103gr | Hornady ELD-X
Bullet Manufacturer:Hornady
Bullet Weight:103 gr
Bullet Diameter:0.243"
Bullet Length:<<locked>>
Caliber:.243 Ackley Improved load data
Case Length (l3):2.045"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:57 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:55,259 psi
Recommended Twist Rate:1:8.0
Load data in caliber .243 Ackley Improved with .243 | 103gr | Hornady ELD-X bullet and 124 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, 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 3100 | <<locked>> | 98% | 49,095 psi | 89% | 2881 fps | 98.9% |
| Accurate 3100 | <<locked>> | 98% | 49,124 psi | 89% | 2884 fps | 98.9% |
| Accurate 4350 | <<locked>> | 88% | 47,747 psi | 86% | 2881 fps | 99.6% |
| Accurate 4350 | <<locked>> | 88% | 47,834 psi | 87% | 2881 fps | 99.7% |
| Accurate High Country | <<locked>> | 96% | 49,966 psi | 90% | 3015 fps | 96% |
| ADI AR 2208 | <<locked>> | 82% | 47,964 psi | 87% | 2815 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 82% | 48,051 psi | 87% | 2815 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 94% | 48,878 psi | 88% | 2913 fps | 96.6% |
| ADI AR 2209 | <<locked>> | 94% | 48,950 psi | 89% | 2917 fps | 96.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 48,863 psi | 88% | 2910 fps | 96.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 48,863 psi | 88% | 2910 fps | 96.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 49,240 psi | 89% | 2917 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 48,472 psi | 88% | 2838 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 48,573 psi | 88% | 2841 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 48,675 psi | 88% | 2940 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 90% | 49,153 psi | 89% | 2946 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 86% | 49,400 psi | 89% | 2963 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 49,487 psi | 90% | 2963 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 48,240 psi | 87% | 2904 fps | 96.5% |
| Alliant Reloder-19 | <<locked>> | 94% | 48,617 psi | 88% | 2910 fps | 96.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 48,878 psi | 88% | 2959 fps | 96.9% |
| Alliant Reloder-22 | <<locked>> | 98% | 48,965 psi | 89% | 2963 fps | 96.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,226 psi | 89% | 2956 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,298 psi | 89% | 2959 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,120 psi | 78% | 2874 fps | 98.6% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,163 psi | 78% | 2877 fps | 98.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 48,979 psi | 89% | 3031 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 49,023 psi | 89% | 3031 fps | 99.8% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,834 psi | 87% | 2940 fps | 96.5% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,892 psi | 87% | 2940 fps | 96.5% |
| Bofors RP3 | <<locked>> | 82% | 49,168 psi | 89% | 2858 fps | 100% |
| Bofors RP3 | <<locked>> | 82% | 49,298 psi | 89% | 2858 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 48,878 psi | 88% | 2959 fps | 96.9% |
| Bofors RP5 | <<locked>> | 98% | 48,965 psi | 89% | 2963 fps | 96.9% |
| Bofors RP7 | <<locked>> | 86% | 48,704 psi | 88% | 2828 fps | 97.6% |
| Bofors RP7 | <<locked>> | 86% | 49,095 psi | 89% | 2838 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 82% | 49,574 psi | 90% | 2867 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 82% | 49,647 psi | 90% | 2867 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 88% | 49,763 psi | 90% | 2927 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 86% | 46,818 psi | 85% | 2871 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 86% | 49,995 psi | 90% | 2887 fps | 97.2% |
| Hodgdon H4350 | <<locked>> | 84% | 47,036 psi | 85% | 2835 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 49,168 psi | 89% | 2871 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 49,240 psi | 89% | 2874 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 49,632 psi | 90% | 2956 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 88% | 49,719 psi | 90% | 2959 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,405 psi | 66% | 1844 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,274 psi | 66% | 1844 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 49,661 psi | 90% | 2864 fps | 97.8% |
| IMR 4350 | <<locked>> | 90% | 49,748 psi | 90% | 2867 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 47,413 psi | 86% | 2805 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 47,500 psi | 86% | 2808 fps | 97.8% |
| IMR 4831 | <<locked>> | 90% | 48,327 psi | 87% | 2874 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 48,747 psi | 88% | 2881 fps | 99.8% |
| Lovex S065 | <<locked>> | 86% | 47,398 psi | 86% | 2805 fps | 98.8% |
| Lovex S065 | <<locked>> | 86% | 47,485 psi | 86% | 2808 fps | 98.9% |
| Lovex S070 | <<locked>> | 88% | 48,559 psi | 88% | 2848 fps | 98.2% |
| Lovex S070 | <<locked>> | 88% | 48,646 psi | 88% | 2851 fps | 98.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,584 psi | 79% | 2782 fps | 97.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,627 psi | 79% | 2782 fps | 98% |
| Norma 204 | <<locked>> | 90% | 49,995 psi | 90% | 2910 fps | 96.7% |
| Norma 204 | <<locked>> | 88% | 46,615 psi | 84% | 2851 fps | 95.9% |
| Norma MRP | <<locked>> | 96% | 48,298 psi | 87% | 2982 fps | 98.1% |
| Norma MRP | <<locked>> | 96% | 48,312 psi | 87% | 2986 fps | 98.1% |
| Norma URP | <<locked>> | 88% | 47,123 psi | 85% | 2867 fps | 99.5% |
| Norma URP | <<locked>> | 88% | 47,239 psi | 85% | 2871 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 90% | 49,066 psi | 89% | 2920 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 90% | 49,153 psi | 89% | 2920 fps | 98.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,368 psi | 82% | 2871 fps | 96.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,759 psi | 83% | 2881 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,057 psi | 67% | 1886 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,927 psi | 67% | 1886 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 49,559 psi | 90% | 2848 fps | 98.7% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 49,676 psi | 90% | 2851 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 48,834 psi | 88% | 2956 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 49,269 psi | 89% | 2963 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 47,442 psi | 86% | 2897 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 47,877 psi | 87% | 2907 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 49,545 psi | 90% | 2982 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 49,588 psi | 90% | 2982 fps | 99.7% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,974 psi | 76% | 2884 fps | 96.5% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,989 psi | 76% | 2884 fps | 96.5% |
| Rottweil R 903 | <<locked>> | 84% | 49,052 psi | 89% | 2848 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 49,516 psi | 90% | 2858 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 47,398 psi | 86% | 2887 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 94% | 47,456 psi | 86% | 2887 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 86% | 48,704 psi | 88% | 2828 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 86% | 49,095 psi | 89% | 2838 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 47,398 psi | 86% | 2805 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 47,485 psi | 86% | 2808 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 88% | 48,559 psi | 88% | 2848 fps | 98.2% |
| Shooters World SW4350 | <<locked>> | 88% | 48,646 psi | 88% | 2851 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 47,398 psi | 86% | 2854 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 47,471 psi | 86% | 2858 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 47,471 psi | 86% | 2700 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 47,558 psi | 86% | 2703 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 50,009 psi | 90% | 2808 fps | 98.3% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 47,036 psi | 85% | 2756 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 46,963 psi | 85% | 2881 fps | 96.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 47,021 psi | 85% | 2881 fps | 96.4% |
| Somchem S355 | <<locked>> | 84% | 49,298 psi | 89% | 2848 fps | 100% |
| Somchem S355 | <<locked>> | 84% | 49,400 psi | 89% | 2851 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 49,153 psi | 89% | 2927 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 49,240 psi | 89% | 2930 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 48,124 psi | 87% | 2867 fps | 97.5% |
| Somchem S385 | <<locked>> | 94% | 48,225 psi | 87% | 2871 fps | 97.5% |
| Vihtavuori N150 | <<locked>> | 84% | 47,181 psi | 85% | 2772 fps | 100% |
| Vihtavuori N150 | <<locked>> | 84% | 47,587 psi | 86% | 2779 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 48,878 psi | 88% | 2864 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 88% | 48,965 psi | 89% | 2864 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 98% | 47,456 psi | 86% | 2841 fps | 96.9% |
| Vihtavuori N165 | <<locked>> | 98% | 47,514 psi | 86% | 2841 fps | 97% |
| Vihtavuori N550 | <<locked>> | 88% | 48,182 psi | 87% | 2867 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 88% | 48,269 psi | 87% | 2871 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 96% | 48,370 psi | 88% | 2930 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 96% | 48,501 psi | 88% | 2930 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 48,370 psi | 88% | 2835 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 48,443 psi | 88% | 2835 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 46,717 psi | 85% | 2867 fps | 97.8% |
| Winchester 760 | <<locked>> | 86% | 47,137 psi | 85% | 2877 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,469 psi | 80% | 3009 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,541 psi | 81% | 3012 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 48,008 psi | 87% | 2858 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 96% | 48,095 psi | 87% | 2858 fps | 96.4% |
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 3100 | <<locked>> | 88% | 34,882 psi | 63% | 2592 fps | 95.3% |
| Accurate 3100 | <<locked>> | 88% | 34,940 psi | 63% | 2595 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 36,143 psi | 65% | 2641 fps | 97.5% |
| Accurate 4350 | <<locked>> | 80% | 36,260 psi | 66% | 2644 fps | 97.6% |
| Accurate High Country | <<locked>> | 94% | 46,412 psi | 84% | 2946 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 45,049 psi | 82% | 2759 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 45,455 psi | 82% | 2769 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 92% | 45,890 psi | 83% | 2854 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 92% | 45,934 psi | 83% | 2858 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,033 psi | 78% | 2795 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,033 psi | 78% | 2795 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,091 psi | 78% | 2795 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,498 psi | 82% | 2785 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,614 psi | 83% | 2789 fps | 100% |
| Alliant Reloder-16 | 35.9 gr | 80% | 35,549 psi | 64% | 2657 fps | 97.7% |
| Alliant Reloder-16 | 35.9 gr | 80% | 35,636 psi | 64% | 2657 fps | 97.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,030 psi | 72% | 2782 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,103 psi | 73% | 2782 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 45,281 psi | 82% | 2844 fps | 95.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 45,643 psi | 83% | 2851 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,670 psi | 77% | 2835 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,714 psi | 77% | 2838 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 82% | 27,630 psi | 50% | 2451 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 82% | 27,688 psi | 50% | 2454 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,359 psi | 60% | 2631 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,402 psi | 60% | 2631 fps | 95.1% |
| Alliant Reloder-26 | 41.6 gr | 84% | 31,792 psi | 58% | 2631 fps | 95.4% |
| Alliant Reloder-26 | 41.6 gr | 84% | 31,865 psi | 58% | 2635 fps | 95.4% |
| Bofors RP15 | <<locked>> | 98% | 44,860 psi | 81% | 2877 fps | 95.6% |
| Bofors RP15 | <<locked>> | 98% | 44,933 psi | 81% | 2881 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 45,774 psi | 83% | 2795 fps | 100% |
| Bofors RP3 | <<locked>> | 80% | 45,876 psi | 83% | 2799 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,670 psi | 77% | 2835 fps | 95.1% |
| Bofors RP5 | <<locked>> | 94% | 42,714 psi | 77% | 2838 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 40,321 psi | 73% | 2661 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 40,712 psi | 74% | 2667 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 46,195 psi | 84% | 2805 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 80% | 46,267 psi | 84% | 2808 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 38,261 psi | 69% | 2690 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 38,348 psi | 69% | 2694 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 82% | 44,121 psi | 80% | 2776 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 82% | 44,193 psi | 80% | 2779 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,909 psi | 60% | 2546 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,996 psi | 60% | 2546 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 82% | 39,856 psi | 72% | 2756 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 82% | 40,219 psi | 73% | 2766 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,180 psi | 49% | 1647 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,093 psi | 49% | 1647 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 40,930 psi | 74% | 2694 fps | 95.6% |
| IMR 4350 | <<locked>> | 84% | 41,292 psi | 75% | 2703 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,887 psi | 76% | 2694 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,003 psi | 76% | 2700 fps | 96.4% |
| IMR 4831 | <<locked>> | 80% | 34,925 psi | 63% | 2598 fps | 97.2% |
| IMR 4831 | <<locked>> | 80% | 35,027 psi | 63% | 2598 fps | 97.3% |
| Lovex S065 | <<locked>> | 80% | 39,334 psi | 71% | 2641 fps | 97.1% |
| Lovex S065 | <<locked>> | 80% | 39,407 psi | 71% | 2644 fps | 97.2% |
| Lovex S070 | <<locked>> | 80% | 37,550 psi | 68% | 2621 fps | 95.4% |
| Lovex S070 | <<locked>> | 80% | 37,666 psi | 68% | 2621 fps | 95.4% |
| Lovex S071 | <<locked>> | 94% | 35,897 psi | 65% | 2618 fps | 95.7% |
| Lovex S071 | <<locked>> | 92% | 33,939 psi | 61% | 2569 fps | 95% |
| Norma 204 | <<locked>> | 86% | 43,627 psi | 79% | 2789 fps | 95% |
| Norma 204 | <<locked>> | 86% | 43,714 psi | 79% | 2792 fps | 95% |
| Norma MRP | 43.2 gr | 90% | 39,204 psi | 71% | 2789 fps | 95.5% |
| Norma MRP | 43.2 gr | 90% | 39,276 psi | 71% | 2792 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 36,042 psi | 65% | 2635 fps | 97.4% |
| Norma URP | <<locked>> | 80% | 36,172 psi | 65% | 2641 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 80% | 34,940 psi | 63% | 2618 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 35,056 psi | 63% | 2621 fps | 95.2% |
| Ramshot Magnum | <<locked>> | 98% | 42,424 psi | 77% | 2808 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 98% | 42,467 psi | 77% | 2812 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,557 psi | 50% | 1683 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,731 psi | 50% | 1690 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,311 psi | 84% | 2789 fps | 98.1% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,398 psi | 84% | 2792 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,554 psi | 77% | 2841 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,627 psi | 77% | 2844 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,998 psi | 65% | 2657 fps | 97.2% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,085 psi | 65% | 2661 fps | 97.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,027 psi | 63% | 2661 fps | 96.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,085 psi | 63% | 2664 fps | 96.4% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,073 psi | 71% | 2812 fps | 95.2% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,392 psi | 71% | 2822 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 43,091 psi | 78% | 2743 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 43,178 psi | 78% | 2743 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 92% | 44,411 psi | 80% | 2828 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 92% | 44,469 psi | 80% | 2831 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 40,321 psi | 73% | 2661 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 40,712 psi | 74% | 2667 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,334 psi | 71% | 2641 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,407 psi | 71% | 2644 fps | 97.2% |
| Shooters World SW4350 | <<locked>> | 80% | 37,550 psi | 68% | 2621 fps | 95.4% |
| Shooters World SW4350 | <<locked>> | 80% | 37,666 psi | 68% | 2621 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,193 psi | 80% | 2795 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,266 psi | 80% | 2795 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,498 psi | 81% | 2651 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,614 psi | 81% | 2654 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,566 psi | 70% | 2585 fps | 95.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,624 psi | 70% | 2589 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 43,990 psi | 80% | 2822 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 44,048 psi | 80% | 2825 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 43,453 psi | 79% | 2743 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 43,569 psi | 79% | 2743 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 32,532 psi | 59% | 2592 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 32,619 psi | 59% | 2595 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 39,479 psi | 71% | 2694 fps | 95.1% |
| Somchem S385 | <<locked>> | 88% | 39,842 psi | 72% | 2700 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 41,466 psi | 75% | 2671 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,568 psi | 75% | 2671 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,420 psi | 68% | 2638 fps | 97.7% |
| Vihtavuori N160 | <<locked>> | 80% | 37,536 psi | 68% | 2641 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 94% | 41,379 psi | 75% | 2723 fps | 95.3% |
| Vihtavuori N165 | <<locked>> | 94% | 41,742 psi | 76% | 2733 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 36,927 psi | 67% | 2638 fps | 97.4% |
| Vihtavuori N550 | <<locked>> | 80% | 37,043 psi | 67% | 2641 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 80% | 28,369 psi | 51% | 2474 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 80% | 28,456 psi | 51% | 2477 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,709 psi | 66% | 2608 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,753 psi | 67% | 2612 fps | 99.3% |
| Winchester 760 | <<locked>> | 80% | 38,261 psi | 69% | 2690 fps | 95.4% |
| Winchester 760 | <<locked>> | 80% | 38,348 psi | 69% | 2694 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,063 psi | 47% | 2477 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,121 psi | 47% | 2480 fps | 95.6% |
| Winchester Supreme 780 | <<locked>> | 94% | 44,585 psi | 81% | 2792 fps | 95.5% |
| Winchester Supreme 780 | <<locked>> | 94% | 44,962 psi | 81% | 2802 fps | 95.6% |
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 124 powders for .243 Ackley Improved loaded with the .243 | 103gr | Hornady ELD-X. Alliant Reloder-26 delivers the highest muzzle velocity at 3,031 fps; across all powders the maximum-charge window runs from 1,844 fps to 3,031 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 124 of the 124 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (381 MPa), the top charges use 66–90 %, leaving at least 10 % headroom. The 103.0 gr projectile in 0.243" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-23, Alliant Reloder-25 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. Norma MRP, Alliant Reloder-26, Alliant Reloder-16 rank at the top here: for .243 Ackley Improved with the .243 | 103gr | Hornady ELD-X 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.