Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 90gr | CutEdge MTAC bullet and 66 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-17 and ReloadSwiss RS 62.
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 2495 | <<locked>> | 82% | 47,398 psi | 86% | 2936 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 49,980 psi | 90% | 2986 fps | 96.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,498 psi | 82% | 2989 fps | 97.1% |
| Accurate 4064 | <<locked>> | 84% | 47,805 psi | 87% | 2989 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 47,950 psi | 87% | 3068 fps | 99% |
| ADI AR 2208 | <<locked>> | 86% | 49,284 psi | 89% | 3022 fps | 99.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 47,456 psi | 86% | 3123 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 49,632 psi | 90% | 3048 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 49,893 psi | 90% | 3064 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 94% | 49,559 psi | 90% | 3140 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 88% | 46,731 psi | 85% | 3100 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,149 psi | 78% | 3025 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,081 psi | 89% | 3212 fps | 99.2% |
| Bofors RP3 | <<locked>> | 86% | 49,588 psi | 90% | 3054 fps | 100% |
| Bofors RP7 | <<locked>> | 90% | 49,995 psi | 90% | 3028 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 84% | 47,166 psi | 85% | 3005 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 90% | 47,558 psi | 86% | 3064 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 49,385 psi | 89% | 3061 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 48,008 psi | 87% | 3058 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 90% | 47,239 psi | 85% | 3084 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,607 psi | 64% | 1962 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 49,661 psi | 90% | 3031 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 48,689 psi | 88% | 3002 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 82% | 48,312 psi | 87% | 2972 fps | 96.7% |
| IMR 4350 | <<locked>> | 92% | 47,630 psi | 86% | 3002 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 88% | 48,573 psi | 88% | 3002 fps | 96.6% |
| IMR 4831 | <<locked>> | 94% | 48,660 psi | 88% | 3064 fps | 99.1% |
| IMR 4895 | <<locked>> | 82% | 47,659 psi | 86% | 3035 fps | 99.6% |
| Lovex S062 | <<locked>> | 84% | 48,602 psi | 88% | 3002 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 48,414 psi | 88% | 3002 fps | 98% |
| Lovex S070 | <<locked>> | 92% | 49,037 psi | 89% | 3035 fps | 97.1% |
| Norma 201 | <<locked>> | 82% | 49,951 psi | 90% | 3015 fps | 100% |
| Norma 203B | <<locked>> | 84% | 49,168 psi | 89% | 3054 fps | 99.7% |
| Norma MRPᴾ | <<locked>> | 100% | 48,805 psi | 88% | 3169 fps | 96.8% |
| Norma URP | <<locked>> | 92% | 47,355 psi | 86% | 3058 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 84% | 49,429 psi | 89% | 3071 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 94% | 49,763 psi | 90% | 3110 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,085 psi | 65% | 2008 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 47,413 psi | 86% | 2986 fps | 97.1% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 49,792 psi | 90% | 3166 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 48,066 psi | 87% | 3091 fps | 98.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 47,210 psi | 85% | 3110 fps | 98.4% |
| Rottweil R 902 | <<locked>> | 82% | 47,572 psi | 86% | 2966 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 88% | 49,821 psi | 90% | 3051 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 90% | 49,995 psi | 90% | 3028 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 48,414 psi | 88% | 3002 fps | 98% |
| Shooters World Precision | <<locked>> | 84% | 48,602 psi | 88% | 3002 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 49,037 psi | 89% | 3035 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 48,196 psi | 87% | 3054 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 49,893 psi | 90% | 3041 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 48,675 psi | 88% | 2910 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 48,153 psi | 87% | 2946 fps | 96.7% |
| Somchem S355 | <<locked>> | 86% | 46,978 psi | 85% | 2992 fps | 99.7% |
| Somchem S365 | <<locked>> | 96% | 49,066 psi | 89% | 3123 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 48,617 psi | 88% | 3048 fps | 96.2% |
| Vihtavuori N135 | <<locked>> | 82% | 47,558 psi | 86% | 2936 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 47,964 psi | 87% | 2946 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 48,254 psi | 87% | 2976 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 49,617 psi | 90% | 3058 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 84% | 49,443 psi | 89% | 2989 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 48,660 psi | 88% | 3058 fps | 98.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,921 psi | 87% | 3107 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 49,661 psi | 90% | 3035 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 47,558 psi | 86% | 3064 fps | 96.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,856 psi | 70% | 3045 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 82% | 49,603 psi | 90% | 3045 fps | 99.9% |
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% | 44,367 psi | 80% | 2884 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 46,673 psi | 84% | 2923 fps | 95.4% |
| Accurate 3100 | <<locked>> | 96% | 39,624 psi | 72% | 2867 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 41,974 psi | 76% | 2881 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 33,344 psi | 60% | 2740 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 40,785 psi | 74% | 2848 fps | 98% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,135 psi | 80% | 3054 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,654 psi | 74% | 2871 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,627 psi | 79% | 2943 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 82% | 33,475 psi | 61% | 2759 fps | 95.1% |
| Alliant Reloder-17 | 39.1 gr | 80% | 35,215 psi | 64% | 2835 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 90% | 31,241 psi | 57% | 2717 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 92% | 36,448 psi | 66% | 2920 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 40,422 psi | 73% | 2874 fps | 99.2% |
| Bofors RP7 | <<locked>> | 88% | 46,949 psi | 85% | 2966 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 41,162 psi | 74% | 2881 fps | 97.1% |
| Hodgdon H414 | <<locked>> | 88% | 44,280 psi | 80% | 2995 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,848 psi | 52% | 2592 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,034 psi | 81% | 2999 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 88% | 44,005 psi | 80% | 3012 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,585 psi | 48% | 1759 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,630 psi | 84% | 2976 fps | 99.7% |
| IMR 4064 | <<locked>> | 80% | 42,801 psi | 77% | 2887 fps | 98.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,426 psi | 82% | 2913 fps | 95.9% |
| IMR 4350 | <<locked>> | 90% | 44,425 psi | 80% | 2936 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,931 psi | 78% | 2884 fps | 95.1% |
| IMR 4831 | <<locked>> | 84% | 34,737 psi | 63% | 2759 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 44,715 psi | 81% | 2979 fps | 99.2% |
| Lovex S062 | <<locked>> | 80% | 42,801 psi | 77% | 2890 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 39,842 psi | 72% | 2822 fps | 95.8% |
| Lovex S070 | <<locked>> | 88% | 43,221 psi | 78% | 2917 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 46,876 psi | 85% | 2959 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 42,960 psi | 78% | 2930 fps | 99% |
| Norma MRP | <<locked>> | 98% | 45,397 psi | 82% | 3094 fps | 95.9% |
| Norma URP | <<locked>> | 82% | 33,750 psi | 61% | 2749 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 42,859 psi | 78% | 2943 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 40,553 psi | 73% | 2923 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,803 psi | 49% | 1798 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,553 psi | 75% | 2864 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,550 psi | 68% | 2910 fps | 99.8% |
| ReloadSwiss RS 62 | 41 gr | 84% | 35,723 psi | 65% | 2822 fps | 95.5% |
| ReloadSwiss RS 70 | 42.7 gr | 86% | 38,130 psi | 69% | 2900 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 44,672 psi | 81% | 2910 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 37,971 psi | 69% | 2812 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 46,949 psi | 85% | 2966 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 84% | 39,842 psi | 72% | 2822 fps | 95.8% |
| Shooters World Precision | <<locked>> | 80% | 42,801 psi | 77% | 2890 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 43,221 psi | 78% | 2917 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,175 psi | 71% | 2867 fps | 98.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,543 psi | 84% | 2979 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,292 psi | 73% | 2759 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,076 psi | 76% | 2825 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 38,711 psi | 70% | 2818 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 28,166 psi | 51% | 2628 fps | 96.3% |
| Somchem S385 | <<locked>> | 96% | 45,571 psi | 82% | 2989 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 44,483 psi | 80% | 2887 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,976 psi | 81% | 2894 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,898 psi | 67% | 2749 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 35,186 psi | 64% | 2753 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 43,323 psi | 78% | 2881 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 34,838 psi | 63% | 2753 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 88% | 31,662 psi | 57% | 2733 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,561 psi | 59% | 2661 fps | 97% |
| Winchester 760 | <<locked>> | 88% | 44,599 psi | 81% | 3002 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 92% | 29,443 psi | 53% | 2736 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,224 psi | 84% | 2982 fps | 99.7% |
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 66 powders for .243 Ackley Improved loaded with the .243 | 90gr | CutEdge MTAC. Alliant Reloder-26 delivers the highest muzzle velocity at 3,212 fps; across all powders the maximum-charge window runs from 1,962 fps to 3,212 fps. Accurate 3100 gives the best case fill at 100 %, and 66 of the 66 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (381 MPa), the top charges use 64–90 %, leaving at least 10 % headroom. The 90.0 gr projectile in 0.243" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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-17, ReloadSwiss RS 62 rank at the top here: for .243 Ackley Improved with the .243 | 90gr | 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.