Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 90gr | SUS-TAC HPT bullet and 61 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 Alliant Reloder-26.
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% | 49,023 psi | 89% | 2953 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,210 psi | 85% | 3018 fps | 97.5% |
| Accurate 4064 | <<locked>> | 84% | 49,661 psi | 90% | 3012 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 49,255 psi | 89% | 3084 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 84% | 47,427 psi | 86% | 2979 fps | 99.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 48,689 psi | 88% | 3143 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 47,601 psi | 86% | 3005 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 82% | 47,819 psi | 87% | 3022 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 92% | 47,398 psi | 86% | 3094 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 88% | 48,051 psi | 87% | 3120 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,193 psi | 80% | 3038 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 46,702 psi | 85% | 3159 fps | 98.8% |
| Bofors RP3 | <<locked>> | 84% | 47,688 psi | 86% | 3012 fps | 99.9% |
| Bofors RP7 | <<locked>> | 88% | 47,964 psi | 87% | 2982 fps | 96% |
| Hodgdon H380 | <<locked>> | 84% | 48,559 psi | 88% | 3025 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 90% | 48,617 psi | 88% | 3077 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 47,195 psi | 85% | 3018 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 49,356 psi | 89% | 3074 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 48,240 psi | 87% | 3097 fps | 96.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,911 psi | 65% | 1965 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 49,922 psi | 90% | 3018 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 82% | 49,124 psi | 89% | 2979 fps | 96.8% |
| IMR 4350 | <<locked>> | 92% | 48,501 psi | 88% | 3012 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 49,734 psi | 90% | 3018 fps | 96.9% |
| IMR 4831 | <<locked>> | 92% | 46,746 psi | 85% | 3022 fps | 98.8% |
| IMR 4895 | <<locked>> | 82% | 49,037 psi | 89% | 3054 fps | 99.7% |
| Lovex S062 | <<locked>> | 84% | 49,676 psi | 90% | 3012 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 49,443 psi | 89% | 3015 fps | 98.1% |
| Lovex S070 | <<locked>> | 90% | 47,108 psi | 85% | 2989 fps | 96.6% |
| Norma 203B | <<locked>> | 82% | 47,137 psi | 85% | 3005 fps | 99.5% |
| Norma MRPᴾ | <<locked>> | 100% | 49,922 psi | 90% | 3182 fps | 97.1% |
| Norma URP | <<locked>> | 92% | 48,747 psi | 88% | 3077 fps | 99% |
| Ramshot Big Game | <<locked>> | 82% | 47,311 psi | 86% | 3025 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 92% | 47,384 psi | 86% | 3061 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,448 psi | 66% | 2011 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 48,689 psi | 88% | 3002 fps | 97.3% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 47,659 psi | 86% | 3123 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 49,226 psi | 89% | 3107 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 48,196 psi | 87% | 3123 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 82% | 48,704 psi | 88% | 2976 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 47,848 psi | 87% | 3009 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 88% | 47,964 psi | 87% | 2982 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 90% | 49,443 psi | 89% | 3015 fps | 98.1% |
| Shooters World Precision | <<locked>> | 84% | 49,676 psi | 90% | 3012 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 47,108 psi | 85% | 2989 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 49,153 psi | 89% | 3064 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 49,879 psi | 90% | 2923 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 49,153 psi | 89% | 2959 fps | 96.9% |
| Somchem S355 | <<locked>> | 86% | 48,370 psi | 88% | 3012 fps | 99.8% |
| Somchem S365 | <<locked>> | 94% | 46,949 psi | 85% | 3077 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 49,734 psi | 90% | 3064 fps | 96.4% |
| Vihtavuori N135 | <<locked>> | 82% | 48,573 psi | 88% | 2946 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 49,211 psi | 89% | 2963 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 49,284 psi | 89% | 2989 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 47,500 psi | 86% | 3015 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 47,398 psi | 86% | 2946 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 46,746 psi | 85% | 3015 fps | 98.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,226 psi | 89% | 3127 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 47,239 psi | 85% | 2989 fps | 99.9% |
| Winchester 760 | <<locked>> | 90% | 48,617 psi | 88% | 3077 fps | 96.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,001 psi | 72% | 3068 fps | 99.8% |
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% | 45,948 psi | 83% | 2904 fps | 100% |
| Accurate 3100 | <<locked>> | 96% | 40,988 psi | 74% | 2890 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 43,482 psi | 79% | 2900 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,896 psi | 63% | 2772 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 41,597 psi | 75% | 2858 fps | 98.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,382 psi | 82% | 3074 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,669 psi | 75% | 2887 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,628 psi | 81% | 2956 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 34,577 psi | 63% | 2785 fps | 95.6% |
| Alliant Reloder-17 | 39.1 gr | 80% | 36,434 psi | 66% | 2861 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,313 psi | 55% | 2680 fps | 95.4% |
| Alliant Reloder-26 | 46 gr | 92% | 37,623 psi | 68% | 2946 fps | 96.1% |
| Bofors RP3 | <<locked>> | 80% | 41,597 psi | 75% | 2890 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 45,049 psi | 82% | 2923 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 42,496 psi | 77% | 2900 fps | 97.4% |
| Hodgdon H414 | <<locked>> | 86% | 42,496 psi | 77% | 2953 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,791 psi | 54% | 2612 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,963 psi | 83% | 3012 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 44,991 psi | 81% | 3028 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,600 psi | 48% | 1755 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,671 psi | 79% | 2897 fps | 98.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,224 psi | 84% | 2923 fps | 96.1% |
| IMR 4350 | <<locked>> | 90% | 45,614 psi | 83% | 2953 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,700 psi | 79% | 2897 fps | 95.3% |
| IMR 4831 | <<locked>> | 82% | 33,576 psi | 61% | 2723 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 45,730 psi | 83% | 2989 fps | 99.4% |
| Lovex S062 | <<locked>> | 80% | 43,845 psi | 79% | 2900 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 38,392 psi | 69% | 2782 fps | 95.3% |
| Lovex S070 | <<locked>> | 86% | 41,655 psi | 75% | 2874 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 43,976 psi | 80% | 2943 fps | 99.1% |
| Norma MRP | <<locked>> | 96% | 43,308 psi | 78% | 3041 fps | 95.1% |
| Norma URP | <<locked>> | 82% | 34,983 psi | 63% | 2772 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 44,121 psi | 80% | 2963 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 41,481 psi | 75% | 2936 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,151 psi | 49% | 1801 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,525 psi | 77% | 2877 fps | 95.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,783 psi | 70% | 2933 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,534 psi | 62% | 2785 fps | 95% |
| ReloadSwiss RS 70 | 41.7 gr | 84% | 36,753 psi | 67% | 2854 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 45,759 psi | 83% | 2920 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 39,175 psi | 71% | 2831 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 86% | 45,049 psi | 82% | 2923 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,392 psi | 69% | 2782 fps | 95.3% |
| Shooters World Precision | <<locked>> | 80% | 43,845 psi | 79% | 2900 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 86% | 41,655 psi | 75% | 2874 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,408 psi | 73% | 2890 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,162 psi | 74% | 2769 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 43,047 psi | 78% | 2838 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 39,769 psi | 72% | 2835 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 29,211 psi | 53% | 2651 fps | 96.8% |
| Somchem S385 | <<locked>> | 96% | 46,717 psi | 85% | 3005 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 45,498 psi | 82% | 2894 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,890 psi | 83% | 2904 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,884 psi | 69% | 2766 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 82% | 36,434 psi | 66% | 2776 fps | 96% |
| Vihtavuori N540 | <<locked>> | 80% | 44,614 psi | 81% | 2897 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,882 psi | 65% | 2772 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 88% | 33,112 psi | 60% | 2766 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,692 psi | 61% | 2687 fps | 97.4% |
| Winchester 760 | <<locked>> | 86% | 42,496 psi | 77% | 2953 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 92% | 30,516 psi | 55% | 2772 fps | 96.3% |
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 61 powders for .243 Ackley Improved loaded with the .243 | 90gr | SUS-TAC HPT. Norma MRP delivers the highest muzzle velocity at 3,182 fps; across all powders the maximum-charge window runs from 1,965 fps to 3,182 fps. Accurate 3100 gives the best case fill at 100 %, and 61 of the 61 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 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, Hodgdon TrailBoss 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, Alliant Reloder-26 rank at the top here: for .243 Ackley Improved with the .243 | 90gr | SUS-TAC HPT 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.