Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 95gr | Nosler Partition bullet and 54 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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 98% | 48,631 psi | 88% | 2982 fps | 98.4% |
| Accurate 4350 | <<locked>> | 88% | 47,021 psi | 85% | 2979 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 82% | 47,645 psi | 86% | 2923 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 48,414 psi | 88% | 3015 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 48,051 psi | 87% | 2949 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 48,356 psi | 88% | 3048 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 86% | 48,863 psi | 88% | 3071 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 98% | 48,356 psi | 88% | 3058 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,805 psi | 88% | 3064 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,641 psi | 77% | 2969 fps | 98% |
| Alliant Reloder-26 | <<locked>> | 96% | 48,457 psi | 88% | 3133 fps | 99.5% |
| Bofors RP3 | <<locked>> | 82% | 48,530 psi | 88% | 2963 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 48,356 psi | 88% | 3058 fps | 96.1% |
| Bofors RP7 | <<locked>> | 86% | 48,341 psi | 87% | 2936 fps | 96.9% |
| Hodgdon H380 | <<locked>> | 82% | 48,892 psi | 88% | 2969 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 88% | 49,255 psi | 89% | 3031 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 86% | 49,385 psi | 89% | 2992 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 48,327 psi | 87% | 2976 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 49,269 psi | 89% | 3061 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,071 psi | 65% | 1932 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 49,240 psi | 89% | 2972 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 46,862 psi | 85% | 2907 fps | 97% |
| IMR 4831 | <<locked>> | 90% | 47,848 psi | 87% | 2979 fps | 99.4% |
| Lovex S065 | <<locked>> | 88% | 49,893 psi | 90% | 2966 fps | 98.8% |
| Lovex S070 | <<locked>> | 88% | 47,979 psi | 87% | 2949 fps | 97.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,033 psi | 78% | 2877 fps | 97.3% |
| Norma 204 | <<locked>> | 90% | 49,284 psi | 89% | 3009 fps | 95.9% |
| Norma MRP | <<locked>> | 96% | 47,688 psi | 86% | 3081 fps | 97.4% |
| Norma URP | <<locked>> | 90% | 49,487 psi | 90% | 3028 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 90% | 48,341 psi | 87% | 3022 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,956 psi | 67% | 1982 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 48,820 psi | 88% | 2949 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 48,457 psi | 88% | 3071 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 47,094 psi | 85% | 3005 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 48,921 psi | 89% | 3084 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 84% | 48,733 psi | 88% | 2959 fps | 100% |
| Rottweil R 907 | <<locked>> | 86% | 48,341 psi | 87% | 2936 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 49,893 psi | 90% | 2966 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 88% | 47,979 psi | 87% | 2949 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 49,893 psi | 90% | 3015 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 49,937 psi | 90% | 2858 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 49,385 psi | 89% | 2910 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 49,588 psi | 90% | 3041 fps | 96.4% |
| Somchem S355 | <<locked>> | 84% | 48,762 psi | 88% | 2956 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 48,443 psi | 88% | 3035 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 47,616 psi | 86% | 2966 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 86% | 49,850 psi | 90% | 2933 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 48,153 psi | 87% | 2966 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 98% | 47,050 psi | 85% | 2940 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 88% | 47,718 psi | 86% | 2972 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 96% | 47,877 psi | 87% | 3031 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 47,877 psi | 87% | 2940 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 49,617 psi | 90% | 3038 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,019 psi | 80% | 3110 fps | 100% |
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>> | 90% | 36,796 psi | 67% | 2736 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 35,752 psi | 65% | 2736 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 80% | 44,570 psi | 81% | 2864 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 45,571 psi | 82% | 2956 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,194 psi | 82% | 2897 fps | 99.9% |
| Alliant Reloder-16 | 37.6 gr | 80% | 35,070 psi | 63% | 2746 fps | 96.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,682 psi | 72% | 2884 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 45,165 psi | 82% | 2995 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 84% | 29,037 psi | 53% | 2589 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 94% | 35,186 psi | 64% | 2776 fps | 95.1% |
| Alliant Reloder-26 | 44.6 gr | 86% | 33,663 psi | 61% | 2782 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 45,295 psi | 82% | 2904 fps | 99.9% |
| Bofors RP5 | <<locked>> | 96% | 45,165 psi | 82% | 2995 fps | 95.2% |
| Bofors RP7 | <<locked>> | 82% | 42,598 psi | 77% | 2815 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 45,672 psi | 83% | 2907 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 40,422 psi | 73% | 2848 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 84% | 46,224 psi | 84% | 2930 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,445 psi | 59% | 2635 fps | 97.5% |
| Hodgdon Superformance | <<locked>> | 84% | 42,453 psi | 77% | 2920 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,035 psi | 49% | 1729 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 43,149 psi | 78% | 2848 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,379 psi | 75% | 2792 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 34,360 psi | 62% | 2684 fps | 96.4% |
| Lovex S065 | <<locked>> | 80% | 38,870 psi | 70% | 2736 fps | 96.3% |
| Lovex S070 | <<locked>> | 82% | 39,595 psi | 72% | 2772 fps | 95.3% |
| Lovex S071 | <<locked>> | 96% | 37,869 psi | 69% | 2762 fps | 95.7% |
| Norma 204 | <<locked>> | 88% | 46,050 psi | 83% | 2946 fps | 95% |
| Norma MRP | 46.3 gr | 92% | 41,553 psi | 75% | 2949 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 35,723 psi | 65% | 2733 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 82% | 36,912 psi | 67% | 2772 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,630 psi | 50% | 1775 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,716 psi | 83% | 2890 fps | 97.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,177 psi | 76% | 2949 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,375 psi | 64% | 2746 fps | 96.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 34,693 psi | 63% | 2749 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 42,728 psi | 77% | 2848 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 82% | 42,598 psi | 77% | 2815 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,870 psi | 70% | 2736 fps | 96.3% |
| Shooters World SW4350 | <<locked>> | 82% | 39,595 psi | 72% | 2772 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,598 psi | 79% | 2894 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,164 psi | 80% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,640 psi | 74% | 2736 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 46,543 psi | 84% | 2982 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 42,902 psi | 78% | 2841 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 32,169 psi | 58% | 2684 fps | 98.7% |
| Somchem S385 | <<locked>> | 90% | 41,872 psi | 76% | 2848 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 41,191 psi | 75% | 2776 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 37,057 psi | 67% | 2733 fps | 97% |
| Vihtavuori N165 | <<locked>> | 96% | 43,888 psi | 79% | 2881 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 36,492 psi | 66% | 2730 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 82% | 29,979 psi | 54% | 2618 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,274 psi | 66% | 2700 fps | 98.8% |
| Winchester 760 | <<locked>> | 82% | 40,422 psi | 73% | 2848 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 86% | 27,456 psi | 50% | 2618 fps | 95.5% |
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 54 powders for .243 Ackley Improved loaded with the .243 | 95gr | Nosler Partition. Alliant Reloder-26 delivers the highest muzzle velocity at 3,133 fps; across all powders the maximum-charge window runs from 1,932 fps to 3,133 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 54 of the 54 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 95.0 gr projectile in 0.243" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, 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. Norma MRP, Alliant Reloder-26, Alliant Reloder-16 rank at the top here: for .243 Ackley Improved with the .243 | 95gr | Nosler Partition 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.