Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 95gr | Sierra Tipped MatchKing bullet and 64 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% | 49,284 psi | 89% | 2874 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 47,790 psi | 86% | 2861 fps | 96% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,862 psi | 85% | 2936 fps | 97.7% |
| Accurate 4064 | <<locked>> | 84% | 49,327 psi | 89% | 2923 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 49,095 psi | 89% | 3002 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 84% | 47,413 psi | 86% | 2897 fps | 99.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 48,675 psi | 88% | 3061 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 47,311 psi | 86% | 2920 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 82% | 47,819 psi | 87% | 2940 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 92% | 47,514 psi | 86% | 3012 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 88% | 47,950 psi | 87% | 3038 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,063 psi | 80% | 2963 fps | 99.7% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,928 psi | 70% | 2854 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 98% | 46,659 psi | 84% | 3084 fps | 99% |
| Bofors RP3 | <<locked>> | 84% | 47,848 psi | 87% | 2933 fps | 100% |
| Bofors RP7 | <<locked>> | 88% | 47,848 psi | 87% | 2900 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 84% | 48,457 psi | 88% | 2943 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 90% | 48,515 psi | 88% | 2999 fps | 97.2% |
| Hodgdon H4350 | <<locked>> | 88% | 48,994 psi | 89% | 2959 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 47,340 psi | 86% | 2943 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 49,211 psi | 89% | 2989 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 48,196 psi | 87% | 3018 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,998 psi | 65% | 1900 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 49,908 psi | 90% | 2936 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 82% | 49,197 psi | 89% | 2904 fps | 97.2% |
| IMR 4350 | <<locked>> | 92% | 48,370 psi | 88% | 2930 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 49,676 psi | 90% | 2940 fps | 97.2% |
| IMR 4831 | <<locked>> | 92% | 46,920 psi | 85% | 2946 fps | 99.1% |
| IMR 4895 | <<locked>> | 82% | 49,066 psi | 89% | 2972 fps | 99.8% |
| Lovex S062 | <<locked>> | 84% | 49,661 psi | 90% | 2930 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 49,487 psi | 90% | 2936 fps | 98.4% |
| Lovex S070 | <<locked>> | 90% | 47,210 psi | 85% | 2913 fps | 97% |
| Norma 203B | <<locked>> | 82% | 47,166 psi | 85% | 2927 fps | 99.7% |
| Norma MRPᴾ | <<locked>> | 100% | 49,835 psi | 90% | 3104 fps | 97.4% |
| Norma URP | <<locked>> | 92% | 48,588 psi | 88% | 2995 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 82% | 47,297 psi | 86% | 2946 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 92% | 47,413 psi | 86% | 2982 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,593 psi | 66% | 1946 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 48,675 psi | 88% | 2923 fps | 97.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 47,398 psi | 86% | 3038 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 49,037 psi | 89% | 3025 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 48,066 psi | 87% | 3045 fps | 98.8% |
| Rottweil R 902 | <<locked>> | 82% | 48,878 psi | 88% | 2897 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 47,703 psi | 86% | 2927 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 88% | 47,848 psi | 87% | 2900 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 49,487 psi | 90% | 2936 fps | 98.4% |
| Shooters World Precision | <<locked>> | 84% | 49,661 psi | 90% | 2930 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 47,210 psi | 85% | 2913 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 49,197 psi | 89% | 2986 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 49,850 psi | 90% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 48,936 psi | 89% | 2877 fps | 97.1% |
| Somchem S355 | <<locked>> | 86% | 48,138 psi | 87% | 2927 fps | 99.9% |
| Somchem S365 | <<locked>> | 94% | 46,934 psi | 85% | 2999 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 49,705 psi | 90% | 2986 fps | 96.7% |
| Vihtavuori N135 | <<locked>> | 82% | 48,689 psi | 88% | 2864 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 49,168 psi | 89% | 2877 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 49,226 psi | 89% | 2907 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 47,297 psi | 86% | 2933 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 47,543 psi | 86% | 2871 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 49,705 psi | 90% | 2992 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,081 psi | 89% | 3045 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 47,094 psi | 85% | 2907 fps | 99.9% |
| Winchester 760 | <<locked>> | 90% | 48,515 psi | 88% | 2999 fps | 97.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,856 psi | 72% | 2992 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% | 46,093 psi | 83% | 2825 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,541 psi | 81% | 2795 fps | 95.1% |
| Accurate 3100 | <<locked>> | 94% | 38,058 psi | 69% | 2756 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 43,613 psi | 79% | 2822 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,547 psi | 59% | 2641 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 41,669 psi | 75% | 2785 fps | 98.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,223 psi | 82% | 2992 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,800 psi | 76% | 2812 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,817 psi | 81% | 2881 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,314 psi | 58% | 2648 fps | 95% |
| Alliant Reloder-17 | 37.5 gr | 80% | 36,260 psi | 66% | 2785 fps | 98.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,255 psi | 55% | 2615 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,550 psi | 66% | 2792 fps | 95% |
| Alliant Reloder-26 | 43.3 gr | 90% | 35,128 psi | 64% | 2808 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 41,858 psi | 76% | 2818 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 44,889 psi | 81% | 2841 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 42,496 psi | 77% | 2825 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 42,511 psi | 77% | 2877 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 86% | 45,963 psi | 83% | 2900 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,878 psi | 54% | 2546 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,093 psi | 83% | 2933 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 44,846 psi | 81% | 2953 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,890 psi | 49% | 1699 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,772 psi | 79% | 2822 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,166 psi | 84% | 2844 fps | 96.5% |
| IMR 4350 | <<locked>> | 90% | 45,397 psi | 82% | 2874 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,801 psi | 79% | 2822 fps | 95.7% |
| IMR 4831 | <<locked>> | 82% | 33,576 psi | 61% | 2651 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 45,963 psi | 83% | 2913 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 43,976 psi | 80% | 2825 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 38,609 psi | 70% | 2713 fps | 95.8% |
| Lovex S070 | <<locked>> | 86% | 41,524 psi | 75% | 2795 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 44,208 psi | 80% | 2867 fps | 99.3% |
| Norma MRP | <<locked>> | 96% | 43,279 psi | 78% | 2969 fps | 95.6% |
| Norma URP | <<locked>> | 82% | 34,998 psi | 63% | 2700 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 44,019 psi | 80% | 2884 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 38,769 psi | 70% | 2799 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,209 psi | 49% | 1739 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,583 psi | 77% | 2802 fps | 96.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,580 psi | 70% | 2854 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,461 psi | 62% | 2713 fps | 95.4% |
| ReloadSwiss RS 70 | 40 gr | 84% | 36,564 psi | 66% | 2782 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 45,832 psi | 83% | 2841 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 39,334 psi | 71% | 2759 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 44,889 psi | 81% | 2841 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,609 psi | 70% | 2713 fps | 95.8% |
| Shooters World Precision | <<locked>> | 80% | 43,976 psi | 80% | 2825 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 41,524 psi | 75% | 2795 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,161 psi | 73% | 2808 fps | 98.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,147 psi | 74% | 2690 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 43,004 psi | 78% | 2762 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 39,900 psi | 72% | 2762 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 29,341 psi | 53% | 2589 fps | 97.3% |
| Somchem S385 | <<locked>> | 94% | 43,555 psi | 79% | 2867 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 45,527 psi | 82% | 2812 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,079 psi | 83% | 2828 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,058 psi | 69% | 2694 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 34,069 psi | 62% | 2644 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 44,614 psi | 81% | 2818 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,692 psi | 61% | 2644 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 86% | 30,864 psi | 56% | 2638 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,620 psi | 61% | 2615 fps | 97.7% |
| Winchester 760 | <<locked>> | 86% | 42,511 psi | 77% | 2877 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,660 psi | 52% | 2641 fps | 95.6% |
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 88 powders for .243 Ackley Improved loaded with the .243 | 95gr | Sierra Tipped MatchKing. Norma MRP delivers the highest muzzle velocity at 3,104 fps; across all powders the maximum-charge window runs from 1,900 fps to 3,104 fps. Accurate 3100 gives the best case fill at 100 %, and 88 of the 88 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. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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 | 95gr | Sierra Tipped MatchKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate High Country, Accurate MAGPRO, ADI AR 2209 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.