Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 106gr | SUS-TAC HP bullet and 63 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 98% | 48,762 psi | 88% | 2835 fps | 99% |
| Accurate 4350 | <<locked>> | 88% | 47,485 psi | 86% | 2831 fps | 99.7% |
| Accurate High Country | <<locked>> | 96% | 49,748 psi | 90% | 2969 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 82% | 48,095 psi | 87% | 2772 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 94% | 48,849 psi | 88% | 2871 fps | 96.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 48,805 psi | 88% | 2867 fps | 96.8% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 48,805 psi | 88% | 2867 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 48,341 psi | 87% | 2792 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 48,762 psi | 88% | 2897 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 86% | 49,211 psi | 89% | 2913 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 48,167 psi | 87% | 2861 fps | 96.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 48,660 psi | 88% | 2913 fps | 97% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,936 psi | 89% | 2910 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,902 psi | 78% | 2831 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 48,501 psi | 88% | 2979 fps | 99.8% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,558 psi | 86% | 2890 fps | 96.6% |
| Bofors RP3 | <<locked>> | 82% | 48,704 psi | 88% | 2805 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 48,660 psi | 88% | 2913 fps | 97% |
| Bofors RP7 | <<locked>> | 86% | 48,689 psi | 88% | 2785 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 82% | 49,139 psi | 89% | 2818 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 88% | 49,966 psi | 90% | 2887 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 84% | 46,615 psi | 84% | 2782 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 48,921 psi | 89% | 2825 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 49,371 psi | 89% | 2910 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,303 psi | 66% | 1808 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 49,487 psi | 90% | 2818 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 47,355 psi | 86% | 2762 fps | 97.8% |
| IMR 4831 | <<locked>> | 90% | 48,457 psi | 88% | 2835 fps | 99.8% |
| Lovex S065 | <<locked>> | 86% | 47,340 psi | 86% | 2762 fps | 98.9% |
| Lovex S070 | <<locked>> | 88% | 48,283 psi | 87% | 2802 fps | 98.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,526 psi | 79% | 2740 fps | 98.1% |
| Norma 204 | <<locked>> | 90% | 49,559 psi | 90% | 2861 fps | 96.8% |
| Norma MRP | <<locked>> | 96% | 48,080 psi | 87% | 2936 fps | 98.2% |
| Norma URP | <<locked>> | 88% | 46,847 psi | 85% | 2822 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 90% | 48,631 psi | 88% | 2867 fps | 98.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,368 psi | 82% | 2831 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,985 psi | 67% | 1850 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 49,269 psi | 89% | 2799 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 48,936 psi | 89% | 2913 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 47,326 psi | 86% | 2854 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 49,545 psi | 90% | 2936 fps | 99.7% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,698 psi | 75% | 2838 fps | 96.6% |
| Rottweil R 903 | <<locked>> | 84% | 48,936 psi | 89% | 2802 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 47,282 psi | 86% | 2844 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 86% | 48,689 psi | 88% | 2785 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 47,340 psi | 86% | 2762 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 88% | 48,283 psi | 87% | 2802 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 47,036 psi | 85% | 2805 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 47,210 psi | 85% | 2654 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 49,806 psi | 90% | 2762 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 46,847 psi | 85% | 2838 fps | 96.5% |
| Somchem S355 | <<locked>> | 84% | 49,182 psi | 89% | 2802 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 48,994 psi | 89% | 2881 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 48,109 psi | 87% | 2825 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 84% | 47,065 psi | 85% | 2726 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 48,588 psi | 88% | 2818 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 98% | 47,210 psi | 85% | 2795 fps | 97.1% |
| Vihtavuori N550 | <<locked>> | 88% | 48,022 psi | 87% | 2822 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 96% | 48,298 psi | 87% | 2884 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 47,993 psi | 87% | 2785 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 49,966 psi | 90% | 2887 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,396 psi | 80% | 2966 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 47,732 psi | 86% | 2812 fps | 96.5% |
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>> | 88% | 34,664 psi | 63% | 2552 fps | 95.5% |
| Accurate 4350 | <<locked>> | 80% | 36,013 psi | 65% | 2598 fps | 97.7% |
| Accurate High Country | <<locked>> | 94% | 46,485 psi | 84% | 2907 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 45,136 psi | 82% | 2717 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 42,844 psi | 78% | 2749 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 42,844 psi | 78% | 2749 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 42,844 psi | 78% | 2749 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,643 psi | 83% | 2746 fps | 100% |
| Alliant Reloder-16 | 34.9 gr | 80% | 35,360 psi | 64% | 2612 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,987 psi | 72% | 2740 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,351 psi | 77% | 2743 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,656 psi | 77% | 2795 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,962 psi | 47% | 2362 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,272 psi | 60% | 2589 fps | 95.3% |
| Alliant Reloder-26 | 40.5 gr | 84% | 31,691 psi | 57% | 2595 fps | 95.6% |
| Bofors RP15 | <<locked>> | 98% | 44,556 psi | 81% | 2835 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 45,614 psi | 83% | 2749 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,656 psi | 77% | 2795 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 40,422 psi | 73% | 2621 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 46,064 psi | 83% | 2759 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 38,159 psi | 69% | 2651 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 80% | 41,031 psi | 74% | 2671 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,953 psi | 60% | 2507 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 82% | 39,711 psi | 72% | 2713 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,180 psi | 49% | 1614 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 40,886 psi | 74% | 2654 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,727 psi | 76% | 2651 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 34,795 psi | 63% | 2556 fps | 97.4% |
| Lovex S065 | <<locked>> | 80% | 39,421 psi | 71% | 2605 fps | 97.3% |
| Lovex S070 | <<locked>> | 80% | 37,666 psi | 68% | 2582 fps | 95.6% |
| Lovex S071 | <<locked>> | 92% | 33,591 psi | 61% | 2526 fps | 95% |
| Norma 204 | <<locked>> | 86% | 43,424 psi | 79% | 2743 fps | 95.1% |
| Norma MRP | 42.1 gr | 90% | 39,117 psi | 71% | 2749 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 36,158 psi | 65% | 2602 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 80% | 34,882 psi | 63% | 2582 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 98% | 42,018 psi | 76% | 2762 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,557 psi | 50% | 1654 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,267 psi | 84% | 2746 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,482 psi | 77% | 2795 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,940 psi | 65% | 2618 fps | 97.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,012 psi | 63% | 2621 fps | 96.5% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,073 psi | 71% | 2772 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 43,207 psi | 78% | 2700 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 90% | 41,336 psi | 75% | 2726 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 40,422 psi | 73% | 2621 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,421 psi | 71% | 2605 fps | 97.3% |
| Shooters World SW4350 | <<locked>> | 80% | 37,666 psi | 68% | 2582 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,106 psi | 80% | 2749 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,512 psi | 81% | 2612 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,435 psi | 70% | 2543 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 43,845 psi | 79% | 2779 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 43,569 psi | 79% | 2700 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 32,634 psi | 59% | 2559 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 39,566 psi | 72% | 2657 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 41,568 psi | 75% | 2631 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,304 psi | 68% | 2595 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 94% | 41,336 psi | 75% | 2684 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 36,811 psi | 67% | 2598 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 80% | 28,224 psi | 51% | 2434 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,724 psi | 66% | 2572 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 38,159 psi | 69% | 2651 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,078 psi | 47% | 2448 fps | 95.9% |
| Winchester Supreme 780 | <<locked>> | 94% | 44,599 psi | 81% | 2753 fps | 95.7% |
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 63 powders for .243 Ackley Improved loaded with the .243 | 106gr | SUS-TAC HP. Alliant Reloder-26 delivers the highest muzzle velocity at 2,979 fps; across all powders the maximum-charge window runs from 1,808 fps to 2,979 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 63 of the 63 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (381 MPa), the top charges use 66–90 %, leaving at least 10 % headroom. The 106.0 gr projectile in 0.243" calls for a 1:7.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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 | 106gr | SUS-TAC HP 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.