Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 90gr | SUS-TAC HPPT 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% | 48,776 psi | 88% | 2949 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,717 psi | 85% | 3005 fps | 97.3% |
| Accurate 4064 | <<locked>> | 84% | 49,081 psi | 89% | 3002 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 49,023 psi | 89% | 3081 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 86% | 49,937 psi | 90% | 3025 fps | 99.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 48,167 psi | 87% | 3130 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 47,369 psi | 86% | 2999 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 82% | 47,587 psi | 86% | 3015 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 92% | 47,195 psi | 85% | 3087 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 88% | 47,529 psi | 86% | 3110 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,048 psi | 80% | 3035 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 46,615 psi | 84% | 3156 fps | 98.7% |
| Bofors RP3 | <<locked>> | 84% | 47,471 psi | 86% | 3005 fps | 99.9% |
| Bofors RP7 | <<locked>> | 88% | 47,761 psi | 86% | 2976 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 84% | 48,051 psi | 87% | 3012 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 90% | 48,080 psi | 87% | 3068 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 46,963 psi | 85% | 3015 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 49,110 psi | 89% | 3068 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 48,109 psi | 87% | 3091 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,839 psi | 65% | 1962 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 49,342 psi | 89% | 3009 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 82% | 48,950 psi | 89% | 2976 fps | 96.7% |
| IMR 4350 | <<locked>> | 92% | 48,341 psi | 87% | 3005 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 88% | 49,211 psi | 89% | 3009 fps | 96.7% |
| IMR 4831 | <<locked>> | 94% | 49,617 psi | 90% | 3074 fps | 99.2% |
| IMR 4895 | <<locked>> | 82% | 48,776 psi | 88% | 3048 fps | 99.7% |
| Lovex S062 | <<locked>> | 84% | 49,472 psi | 90% | 3005 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 49,284 psi | 89% | 3012 fps | 98.1% |
| Lovex S070 | <<locked>> | 92% | 49,980 psi | 90% | 3041 fps | 97.2% |
| Norma 203B | <<locked>> | 84% | 49,966 psi | 90% | 3058 fps | 99.7% |
| Norma MRPᴾ | <<locked>> | 100% | 49,472 psi | 90% | 3176 fps | 96.9% |
| Norma URP | <<locked>> | 92% | 48,196 psi | 87% | 3064 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 82% | 46,804 psi | 85% | 3015 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 92% | 47,195 psi | 85% | 3054 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,390 psi | 66% | 2008 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 48,211 psi | 87% | 2992 fps | 97.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 47,427 psi | 86% | 3117 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 48,689 psi | 88% | 3097 fps | 98.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 48,051 psi | 87% | 3120 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 82% | 48,457 psi | 88% | 2969 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 47,674 psi | 86% | 3005 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 88% | 47,761 psi | 86% | 2976 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 49,284 psi | 89% | 3012 fps | 98.1% |
| Shooters World Precision | <<locked>> | 84% | 49,472 psi | 90% | 3005 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 49,980 psi | 90% | 3041 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 48,950 psi | 89% | 3061 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 49,284 psi | 89% | 2910 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 49,023 psi | 89% | 2956 fps | 96.8% |
| Somchem S355 | <<locked>> | 86% | 47,819 psi | 87% | 3002 fps | 99.7% |
| Somchem S365 | <<locked>> | 94% | 46,789 psi | 85% | 3074 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 49,588 psi | 90% | 3058 fps | 96.3% |
| Vihtavuori N135 | <<locked>> | 82% | 48,312 psi | 87% | 2940 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 48,646 psi | 88% | 2949 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 49,110 psi | 89% | 2982 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 47,311 psi | 86% | 3009 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 47,239 psi | 85% | 2943 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 49,588 psi | 90% | 3068 fps | 98.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,037 psi | 89% | 3120 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 46,818 psi | 85% | 2976 fps | 99.8% |
| Winchester 760 | <<locked>> | 90% | 48,399 psi | 88% | 3071 fps | 96.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,595 psi | 72% | 3054 fps | 99.7% |
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% | 45,687 psi | 83% | 2897 fps | 100% |
| Accurate 3100 | <<locked>> | 96% | 40,495 psi | 73% | 2877 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 43,178 psi | 78% | 2894 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,679 psi | 63% | 2766 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 41,394 psi | 75% | 2851 fps | 98.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,846 psi | 81% | 3061 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,452 psi | 75% | 2881 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,353 psi | 80% | 2949 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 34,403 psi | 62% | 2776 fps | 95.4% |
| Alliant Reloder-17 | 38.8 gr | 80% | 36,013 psi | 65% | 2848 fps | 97.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,182 psi | 55% | 2677 fps | 95.3% |
| Alliant Reloder-26 | 45.8 gr | 92% | 37,478 psi | 68% | 2940 fps | 96% |
| Bofors RP3 | <<locked>> | 80% | 41,379 psi | 75% | 2884 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 44,889 psi | 81% | 2917 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 41,989 psi | 76% | 2890 fps | 97.2% |
| Hodgdon H414 | <<locked>> | 88% | 45,121 psi | 82% | 3005 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,617 psi | 54% | 2605 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,730 psi | 83% | 3005 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 44,860 psi | 81% | 3025 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,760 psi | 48% | 1755 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,439 psi | 79% | 2890 fps | 98.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,050 psi | 83% | 2920 fps | 96% |
| IMR 4350 | <<locked>> | 90% | 45,165 psi | 82% | 2943 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,540 psi | 79% | 2890 fps | 95.2% |
| IMR 4831 | <<locked>> | 82% | 33,402 psi | 60% | 2717 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 45,484 psi | 82% | 2982 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 43,613 psi | 79% | 2897 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 38,218 psi | 69% | 2776 fps | 95.2% |
| Lovex S070 | <<locked>> | 88% | 44,150 psi | 80% | 2927 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 43,758 psi | 79% | 2940 fps | 99.1% |
| Norma MRP | <<locked>> | 96% | 43,192 psi | 78% | 3038 fps | 95% |
| Norma URP | <<locked>> | 82% | 34,548 psi | 63% | 2759 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 43,613 psi | 79% | 2953 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 41,350 psi | 75% | 2930 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,050 psi | 49% | 1795 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,308 psi | 77% | 2871 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,290 psi | 69% | 2923 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 36,651 psi | 66% | 2838 fps | 95.8% |
| ReloadSwiss RS 70 | 42.4 gr | 86% | 38,972 psi | 71% | 2913 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 45,527 psi | 82% | 2913 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 38,928 psi | 70% | 2825 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 86% | 44,889 psi | 81% | 2917 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,218 psi | 69% | 2776 fps | 95.2% |
| Shooters World Precision | <<locked>> | 80% | 43,613 psi | 79% | 2897 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 44,150 psi | 80% | 2927 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,914 psi | 72% | 2877 fps | 98.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,930 psi | 74% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,931 psi | 78% | 2835 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 39,552 psi | 72% | 2828 fps | 98.6% |
| Somchem S365 | <<locked>> | 80% | 29,037 psi | 53% | 2644 fps | 96.6% |
| Somchem S385 | <<locked>> | 96% | 46,209 psi | 84% | 2995 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 45,223 psi | 82% | 2890 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,672 psi | 83% | 2897 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,695 psi | 68% | 2759 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 82% | 36,230 psi | 66% | 2769 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 80% | 44,077 psi | 80% | 2887 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,694 psi | 65% | 2766 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 88% | 32,663 psi | 59% | 2756 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,547 psi | 61% | 2680 fps | 97.3% |
| Winchester 760 | <<locked>> | 86% | 42,308 psi | 77% | 2946 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 92% | 30,414 psi | 55% | 2766 fps | 96.2% |
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 61 powders for .243 Ackley Improved loaded with the .243 | 90gr | SUS-TAC HPPT. Norma MRP delivers the highest muzzle velocity at 3,176 fps; across all powders the maximum-charge window runs from 1,962 fps to 3,176 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 HPPT 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.