Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 100gr | CutEdge MTAC bullet and 67 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and Norma MRP.
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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 49,255 psi | 89% | 2841 fps | 97.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,559 psi | 90% | 2930 fps | 98.8% |
| Accurate 4064 | <<locked>> | 82% | 48,022 psi | 87% | 2844 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 48,312 psi | 87% | 2933 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 84% | 49,095 psi | 89% | 2874 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 96% | 49,922 psi | 90% | 2972 fps | 96.5% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 49,748 psi | 90% | 2966 fps | 96.5% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 49,748 psi | 90% | 2966 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 49,385 psi | 89% | 2900 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 49,545 psi | 90% | 2917 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 92% | 49,690 psi | 90% | 3002 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 86% | 46,992 psi | 85% | 2963 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 49,081 psi | 89% | 2959 fps | 96.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,632 psi | 90% | 3015 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,702 psi | 85% | 2956 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,611 psi | 73% | 2858 fps | 97.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 49,501 psi | 90% | 3084 fps | 99.7% |
| Bofors RP3 | <<locked>> | 84% | 49,545 psi | 90% | 2910 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,632 psi | 90% | 3015 fps | 96.7% |
| Bofors RP7 | <<locked>> | 88% | 49,676 psi | 90% | 2887 fps | 97.5% |
| Hodgdon H380 | <<locked>> | 82% | 46,949 psi | 85% | 2864 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 88% | 47,456 psi | 86% | 2927 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 86% | 47,935 psi | 87% | 2894 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 49,661 psi | 90% | 2927 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 47,326 psi | 86% | 2956 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,129 psi | 65% | 1867 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 48,443 psi | 88% | 2858 fps | 99.8% |
| IMR 4350 | <<locked>> | 90% | 47,601 psi | 86% | 2871 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 48,501 psi | 88% | 2867 fps | 97.6% |
| IMR 4831 | <<locked>> | 92% | 49,008 psi | 89% | 2927 fps | 99.7% |
| Lovex S062 | <<locked>> | 82% | 48,530 psi | 88% | 2854 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 48,196 psi | 87% | 2864 fps | 98.7% |
| Lovex S070 | <<locked>> | 90% | 48,979 psi | 89% | 2897 fps | 98% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,886 psi | 74% | 2769 fps | 97% |
| Norma 203B | <<locked>> | 82% | 48,863 psi | 88% | 2904 fps | 99.9% |
| Norma MRP | <<locked>> | 98% | 48,907 psi | 89% | 3035 fps | 97.9% |
| Norma URP | <<locked>> | 90% | 47,558 psi | 86% | 2920 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 82% | 49,472 psi | 90% | 2927 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 92% | 49,879 psi | 90% | 2976 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,709 psi | 66% | 1913 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 47,195 psi | 85% | 2848 fps | 98% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 46,499 psi | 84% | 2959 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 48,341 psi | 87% | 2956 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 47,224 psi | 85% | 2976 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 86% | 49,763 psi | 90% | 2907 fps | 100% |
| Rottweil R 905 | <<locked>> | 96% | 48,153 psi | 87% | 2943 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 88% | 49,676 psi | 90% | 2887 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 48,196 psi | 87% | 2864 fps | 98.7% |
| Shooters World Precision | <<locked>> | 82% | 48,530 psi | 88% | 2854 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 48,979 psi | 89% | 2897 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 48,225 psi | 87% | 2913 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 48,341 psi | 87% | 2759 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 47,892 psi | 87% | 2812 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 47,703 psi | 86% | 2933 fps | 96.2% |
| Somchem S355 | <<locked>> | 84% | 47,050 psi | 85% | 2854 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 49,806 psi | 90% | 2986 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 48,776 psi | 88% | 2920 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 86% | 48,037 psi | 87% | 2831 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 49,748 psi | 90% | 2923 fps | 99.6% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,211 psi | 87% | 2894 fps | 96.8% |
| Vihtavuori N540 | <<locked>> | 82% | 49,124 psi | 89% | 2838 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 48,907 psi | 89% | 2923 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 98% | 48,776 psi | 88% | 2982 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 49,269 psi | 89% | 2890 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 47,819 psi | 87% | 2933 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,003 psi | 76% | 2999 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 48,907 psi | 89% | 2913 fps | 96.2% |
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 2700 | <<locked>> | 80% | 46,253 psi | 84% | 2785 fps | 96.5% |
| Accurate 3100 | <<locked>> | 92% | 37,275 psi | 67% | 2690 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 44,976 psi | 81% | 2792 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,779 psi | 61% | 2625 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 80% | 43,207 psi | 78% | 2766 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 94% | 46,775 psi | 85% | 2910 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 46,630 psi | 84% | 2910 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 46,630 psi | 84% | 2910 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,381 psi | 79% | 2789 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,456 psi | 84% | 2861 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,504 psi | 61% | 2641 fps | 96.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,927 psi | 69% | 2776 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,035 psi | 83% | 2900 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 46,108 psi | 83% | 2946 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 84% | 27,601 psi | 50% | 2487 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 96% | 35,737 psi | 65% | 2733 fps | 95.8% |
| Alliant Reloder-26 | 43.4 gr | 88% | 34,200 psi | 62% | 2740 fps | 96.1% |
| Bofors RP3 | <<locked>> | 80% | 43,381 psi | 79% | 2795 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 46,108 psi | 83% | 2946 fps | 95.8% |
| Bofors RP7 | <<locked>> | 82% | 40,988 psi | 74% | 2717 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 43,976 psi | 80% | 2805 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 82% | 38,711 psi | 70% | 2743 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 84% | 44,657 psi | 81% | 2828 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,995 psi | 56% | 2536 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 84% | 40,654 psi | 74% | 2812 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,890 psi | 49% | 1670 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,382 psi | 82% | 2802 fps | 99.6% |
| IMR 4350 | <<locked>> | 86% | 41,640 psi | 75% | 2749 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,161 psi | 73% | 2697 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 32,822 psi | 59% | 2585 fps | 96.1% |
| Lovex S062 | <<locked>> | 80% | 45,484 psi | 82% | 2802 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,376 psi | 68% | 2638 fps | 96.2% |
| Lovex S070 | <<locked>> | 82% | 37,942 psi | 69% | 2671 fps | 95.1% |
| Lovex S071 | <<locked>> | 96% | 35,578 psi | 64% | 2651 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 45,832 psi | 83% | 2848 fps | 99.8% |
| Norma MRP | 44 gr | 92% | 39,508 psi | 71% | 2835 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 34,026 psi | 62% | 2628 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 80% | 46,035 psi | 83% | 2867 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 37,942 psi | 69% | 2733 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,195 psi | 49% | 1706 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,280 psi | 80% | 2792 fps | 97.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,422 psi | 73% | 2841 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,504 psi | 61% | 2641 fps | 95.9% |
| ReloadSwiss RS 70 | 39.1 gr | 80% | 33,156 psi | 60% | 2644 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 40,741 psi | 74% | 2740 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 94% | 45,005 psi | 81% | 2881 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 82% | 40,988 psi | 74% | 2717 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,376 psi | 68% | 2638 fps | 96.2% |
| Shooters World Precision | <<locked>> | 80% | 45,484 psi | 82% | 2802 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 37,942 psi | 69% | 2671 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,076 psi | 76% | 2795 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,670 psi | 77% | 2664 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,131 psi | 71% | 2638 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 44,585 psi | 81% | 2874 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 41,307 psi | 75% | 2743 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 30,472 psi | 55% | 2579 fps | 98.4% |
| Somchem S385 | <<locked>> | 92% | 42,801 psi | 77% | 2805 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 39,436 psi | 71% | 2674 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 35,418 psi | 64% | 2631 fps | 96.8% |
| Vihtavuori N165 | <<locked>> | 96% | 41,887 psi | 76% | 2772 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 46,079 psi | 83% | 2789 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,882 psi | 63% | 2631 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 84% | 30,211 psi | 55% | 2569 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,882 psi | 63% | 2605 fps | 98.7% |
| Winchester 760 | <<locked>> | 82% | 38,711 psi | 70% | 2743 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 88% | 27,775 psi | 50% | 2579 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 96% | 45,353 psi | 82% | 2844 fps | 95.3% |
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 67 powders for .243 Ackley Improved loaded with the .243 | 100gr | CutEdge MTAC. Alliant Reloder-26 delivers the highest muzzle velocity at 3,084 fps; across all powders the maximum-charge window runs from 1,867 fps to 3,084 fps. Accurate 3100 gives the best case fill at 100 %, and 67 of the 67 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (381 MPa), the top charges use 65–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.243" calls for a 1:7.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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. Alliant Reloder-26, ReloadSwiss RS 70, Norma MRP rank at the top here: for .243 Ackley Improved with the .243 | 100gr | CutEdge MTAC 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.