Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 95gr | Barnes LRX BT bullet and 65 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, 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 2495 | <<locked>> | 82% | 48,327 psi | 87% | 2874 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 47,572 psi | 86% | 2867 fps | 96.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,818 psi | 85% | 2943 fps | 97.8% |
| Accurate 4064 | <<locked>> | 84% | 48,805 psi | 88% | 2927 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 48,994 psi | 89% | 3012 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 84% | 47,079 psi | 85% | 2904 fps | 99.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 48,588 psi | 88% | 3068 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 47,152 psi | 85% | 2927 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 82% | 47,703 psi | 86% | 2949 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 92% | 47,311 psi | 86% | 3018 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 88% | 48,080 psi | 87% | 3051 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,237 psi | 80% | 2972 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,638 psi | 70% | 2861 fps | 96.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 46,702 psi | 85% | 3094 fps | 99.1% |
| Bofors RP3 | <<locked>> | 84% | 47,500 psi | 86% | 2940 fps | 100% |
| Bofors RP7 | <<locked>> | 88% | 47,601 psi | 86% | 2907 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 84% | 48,196 psi | 87% | 2949 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 90% | 48,559 psi | 88% | 3009 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 88% | 48,791 psi | 88% | 2969 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 47,108 psi | 85% | 2949 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 49,110 psi | 89% | 2995 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 48,428 psi | 88% | 3035 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,795 psi | 65% | 1906 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 49,501 psi | 90% | 2940 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 82% | 49,124 psi | 89% | 2913 fps | 97.3% |
| IMR 4350 | <<locked>> | 92% | 48,457 psi | 88% | 2946 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 49,545 psi | 90% | 2949 fps | 97.3% |
| IMR 4831 | <<locked>> | 92% | 46,557 psi | 84% | 2949 fps | 99.1% |
| IMR 4895 | <<locked>> | 82% | 48,936 psi | 89% | 2979 fps | 99.8% |
| Lovex S062 | <<locked>> | 84% | 49,501 psi | 90% | 2936 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 49,139 psi | 89% | 2943 fps | 98.4% |
| Lovex S070 | <<locked>> | 90% | 47,137 psi | 85% | 2923 fps | 97.1% |
| Norma 203B | <<locked>> | 82% | 47,021 psi | 85% | 2936 fps | 99.7% |
| Norma MRPᴾ | <<locked>> | 100% | 49,937 psi | 90% | 3117 fps | 97.6% |
| Norma URP | <<locked>> | 92% | 48,675 psi | 88% | 3005 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 82% | 47,123 psi | 85% | 2953 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 92% | 47,398 psi | 86% | 2995 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,332 psi | 66% | 1952 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 48,414 psi | 88% | 2930 fps | 97.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 47,601 psi | 86% | 3051 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 48,936 psi | 89% | 3031 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 48,327 psi | 87% | 3061 fps | 99% |
| Rottweil R 902 | <<locked>> | 82% | 48,327 psi | 87% | 2900 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 47,747 psi | 86% | 2940 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 98% | 48,892 psi | 88% | 3015 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 88% | 47,601 psi | 86% | 2907 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 49,139 psi | 89% | 2943 fps | 98.4% |
| Shooters World Precision | <<locked>> | 84% | 49,501 psi | 90% | 2936 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 47,137 psi | 85% | 2923 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 49,371 psi | 89% | 2999 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 49,458 psi | 90% | 2844 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 48,936 psi | 89% | 2890 fps | 97.3% |
| Somchem S355 | <<locked>> | 86% | 47,892 psi | 87% | 2933 fps | 99.9% |
| Somchem S365 | <<locked>> | 94% | 46,978 psi | 85% | 3009 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 49,516 psi | 90% | 2992 fps | 96.9% |
| Vihtavuori N135 | <<locked>> | 82% | 48,327 psi | 87% | 2871 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 48,762 psi | 88% | 2881 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 49,342 psi | 89% | 2920 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 47,340 psi | 86% | 2943 fps | 99% |
| Vihtavuori N540 | <<locked>> | 82% | 47,326 psi | 86% | 2874 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 49,690 psi | 90% | 3002 fps | 99.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,284 psi | 89% | 3054 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 47,021 psi | 85% | 2917 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 48,559 psi | 88% | 3009 fps | 97.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,755 psi | 72% | 3002 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% | 45,150 psi | 82% | 2822 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,338 psi | 80% | 2805 fps | 95.2% |
| Accurate 3100 | <<locked>> | 94% | 37,652 psi | 68% | 2756 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 42,728 psi | 77% | 2818 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,461 psi | 62% | 2700 fps | 96% |
| ADI AR 2208 | <<locked>> | 80% | 41,669 psi | 75% | 2795 fps | 98.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,150 psi | 82% | 3002 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,379 psi | 75% | 2812 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,382 psi | 80% | 2884 fps | 99.1% |
| Alliant Reloder-16 | 35.6 gr | 80% | 32,155 psi | 58% | 2654 fps | 95.1% |
| Alliant Reloder-17 | 38.3 gr | 80% | 36,013 psi | 65% | 2789 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,820 psi | 54% | 2612 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,230 psi | 66% | 2795 fps | 95% |
| Alliant Reloder-26 | 44.2 gr | 90% | 34,780 psi | 63% | 2808 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 41,249 psi | 75% | 2818 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 44,962 psi | 81% | 2854 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 41,959 psi | 76% | 2825 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 42,279 psi | 77% | 2881 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 86% | 45,788 psi | 83% | 2910 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,370 psi | 53% | 2543 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,021 psi | 83% | 2940 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 45,049 psi | 82% | 2966 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,571 psi | 48% | 1703 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,772 psi | 79% | 2831 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,137 psi | 83% | 2854 fps | 96.6% |
| IMR 4350 | <<locked>> | 88% | 42,656 psi | 77% | 2828 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,988 psi | 74% | 2772 fps | 95% |
| IMR 4831 | <<locked>> | 82% | 33,257 psi | 60% | 2654 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 45,527 psi | 82% | 2917 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 43,468 psi | 79% | 2828 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 38,043 psi | 69% | 2713 fps | 95.7% |
| Lovex S070 | <<locked>> | 86% | 41,466 psi | 75% | 2808 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 43,758 psi | 79% | 2871 fps | 99.3% |
| Norma MRP | <<locked>> | 96% | 43,352 psi | 78% | 2982 fps | 95.8% |
| Norma URP | <<locked>> | 82% | 34,490 psi | 62% | 2700 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 43,845 psi | 79% | 2890 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 38,740 psi | 70% | 2808 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,847 psi | 49% | 1742 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,337 psi | 77% | 2812 fps | 96.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,363 psi | 69% | 2861 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,069 psi | 62% | 2713 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 36,463 psi | 66% | 2792 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 45,295 psi | 82% | 2844 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,711 psi | 70% | 2759 fps | 99% |
| Rottweil R 905 | <<locked>> | 96% | 45,672 psi | 83% | 2956 fps | 95% |
| Rottweil R 907 | <<locked>> | 86% | 44,962 psi | 81% | 2854 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,043 psi | 69% | 2713 fps | 95.7% |
| Shooters World Precision | <<locked>> | 80% | 43,468 psi | 79% | 2828 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 41,466 psi | 75% | 2808 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,001 psi | 72% | 2815 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,147 psi | 74% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,931 psi | 78% | 2772 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 39,363 psi | 71% | 2762 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 28,776 psi | 52% | 2582 fps | 97.1% |
| Somchem S385 | <<locked>> | 94% | 43,381 psi | 79% | 2874 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 45,498 psi | 82% | 2825 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,730 psi | 83% | 2831 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,565 psi | 68% | 2694 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 33,605 psi | 61% | 2644 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 44,106 psi | 80% | 2818 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,098 psi | 60% | 2641 fps | 95% |
| Vihtavuori N555 | <<locked>> | 86% | 30,414 psi | 55% | 2631 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,272 psi | 60% | 2618 fps | 97.7% |
| Winchester 760 | <<locked>> | 86% | 42,279 psi | 77% | 2881 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,065 psi | 51% | 2631 fps | 95.4% |
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 65 powders for .243 Ackley Improved loaded with the .243 | 95gr | Barnes LRX BT. Norma MRP delivers the highest muzzle velocity at 3,117 fps; across all powders the maximum-charge window runs from 1,906 fps to 3,117 fps. Accurate 3100 gives the best case fill at 100 %, and 65 of the 65 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 1:7.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-25 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. Alliant Reloder-17, Alliant Reloder-26, Alliant Reloder-16 rank at the top here: for .243 Ackley Improved with the .243 | 95gr | Barnes LRX BT 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.