Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 115gr | DTAC RBT Closed Nose - Boron Nitride 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-26, Winchester StaBALL HD and IMR 7828 SSC.
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>> | 96% | 50,009 psi | 90% | 2756 fps | 99.6% |
| Accurate 4350 | <<locked>> | 86% | 48,617 psi | 88% | 2746 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 49,530 psi | 90% | 2789 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 94% | 47,355 psi | 86% | 2779 fps | 96.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,275 psi | 67% | 2618 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 49,327 psi | 89% | 2802 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 49,980 psi | 90% | 2818 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 49,052 psi | 89% | 2779 fps | 97.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 49,835 psi | 90% | 2838 fps | 98.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 47,384 psi | 86% | 2776 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,760 psi | 85% | 2815 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 92% | 46,427 psi | 84% | 2841 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 48,762 psi | 88% | 2818 fps | 97.9% |
| Bofors RP5 | <<locked>> | 96% | 49,835 psi | 90% | 2838 fps | 98.2% |
| Bofors RP7 | <<locked>> | 84% | 49,124 psi | 89% | 2700 fps | 98.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,412 psi | 84% | 2753 fps | 96.7% |
| Hodgdon H414 | <<locked>> | 84% | 47,384 psi | 86% | 2743 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 82% | 47,253 psi | 86% | 2700 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 49,661 psi | 90% | 2766 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 49,937 psi | 90% | 2736 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,847 psi | 83% | 2854 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 84% | 46,528 psi | 84% | 2762 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 66% | 1749 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 47,065 psi | 85% | 2684 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 82% | 47,413 psi | 86% | 2671 fps | 98.6% |
| IMR 4831 | <<locked>> | 88% | 49,066 psi | 89% | 2740 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 49,211 psi | 89% | 2723 fps | 96.1% |
| IMR 7828 SSC | <<locked>> | 96% | 48,240 psi | 87% | 2808 fps | 96.5% |
| Lovex S065 | <<locked>> | 84% | 47,572 psi | 86% | 2671 fps | 99.5% |
| Lovex S070 | <<locked>> | 86% | 48,602 psi | 88% | 2710 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,790 psi | 86% | 2720 fps | 99.4% |
| Norma 204 | <<locked>> | 86% | 46,818 psi | 85% | 2717 fps | 97.2% |
| Norma MRP | <<locked>> | 94% | 49,385 psi | 89% | 2861 fps | 99.1% |
| Norma URP | <<locked>> | 86% | 47,442 psi | 86% | 2730 fps | 99.9% |
| Ramshot Grand | <<locked>> | 96% | 48,182 psi | 87% | 2822 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 88% | 49,617 psi | 90% | 2785 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,647 psi | 90% | 2822 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,463 psi | 68% | 1788 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 49,676 psi | 90% | 2812 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 48,167 psi | 87% | 2762 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 46,630 psi | 84% | 2785 fps | 99.8% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,861 psi | 83% | 2851 fps | 99% |
| Rottweil R 903 | <<locked>> | 82% | 49,748 psi | 90% | 2710 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,863 psi | 87% | 2707 fps | 96.4% |
| Rottweil R 905 | <<locked>> | 92% | 48,327 psi | 87% | 2766 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 84% | 49,124 psi | 89% | 2700 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 47,572 psi | 86% | 2671 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 86% | 48,602 psi | 88% | 2710 fps | 99.1% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 46,804 psi | 85% | 2621 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 47,906 psi | 87% | 2759 fps | 97.8% |
| Somchem S355 | <<locked>> | 82% | 49,835 psi | 90% | 2707 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,979 psi | 89% | 2697 fps | 95.8% |
| Somchem S365 | <<locked>> | 88% | 47,094 psi | 85% | 2743 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 48,704 psi | 88% | 2740 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 82% | 47,688 psi | 86% | 2635 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 49,458 psi | 90% | 2730 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 48,167 psi | 87% | 2720 fps | 98.2% |
| Vihtavuori N550 | <<locked>> | 86% | 48,530 psi | 88% | 2730 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 94% | 49,748 psi | 90% | 2802 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 49,647 psi | 90% | 2851 fps | 96.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,443 psi | 88% | 2815 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 48,428 psi | 88% | 2694 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 47,384 psi | 86% | 2743 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,443 psi | 89% | 2943 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 48,602 psi | 88% | 2733 fps | 97.7% |
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 3100 | <<locked>> | 82% | 31,256 psi | 57% | 2379 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 39,624 psi | 72% | 2582 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 86% | 40,756 psi | 74% | 2618 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 92% | 44,063 psi | 80% | 2713 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 98% | 34,998 psi | 63% | 2559 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,218 psi | 69% | 2589 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,424 psi | 79% | 2707 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,495 psi | 73% | 2612 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,087 psi | 69% | 2602 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,239 psi | 51% | 2356 fps | 97.7% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,023 psi | 54% | 2418 fps | 95.1% |
| Alliant Reloder-26 | 39 gr | 80% | 30,168 psi | 55% | 2464 fps | 96.2% |
| Bofors RP15 | <<locked>> | 92% | 40,103 psi | 73% | 2648 fps | 95.6% |
| Bofors RP5 | <<locked>> | 88% | 38,087 psi | 69% | 2602 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 43,279 psi | 78% | 2592 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 98% | 43,120 psi | 78% | 2687 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 41,336 psi | 75% | 2625 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 80% | 44,063 psi | 80% | 2641 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,180 psi | 84% | 2703 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,926 psi | 65% | 2484 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,579 psi | 68% | 2661 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 40,277 psi | 73% | 2638 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,354 psi | 50% | 1558 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 38,957 psi | 70% | 2523 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,541 psi | 81% | 2618 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 37,826 psi | 68% | 2530 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,267 psi | 84% | 2667 fps | 95.4% |
| IMR 7828 SSC | 42.8 gr | 94% | 45,150 psi | 82% | 2749 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 42,279 psi | 77% | 2572 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 40,524 psi | 73% | 2556 fps | 97.5% |
| Lovex S071 | <<locked>> | 88% | 32,445 psi | 59% | 2408 fps | 95.8% |
| Norma 204 | <<locked>> | 82% | 41,104 psi | 74% | 2605 fps | 95.6% |
| Norma MRP | <<locked>> | 84% | 34,766 psi | 63% | 2552 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 39,262 psi | 71% | 2575 fps | 99.1% |
| Ramshot Grand | <<locked>> | 94% | 45,005 psi | 81% | 2759 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 37,840 psi | 68% | 2559 fps | 97.5% |
| Ramshot Magnum | <<locked>> | 92% | 37,231 psi | 67% | 2575 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 51% | 1601 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,122 psi | 83% | 2756 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,276 psi | 71% | 2598 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,855 psi | 69% | 2605 fps | 98.5% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,664 psi | 63% | 2582 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 46,630 psi | 84% | 2661 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 44,904 psi | 81% | 2651 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 86% | 39,595 psi | 72% | 2595 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 43,279 psi | 78% | 2592 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,279 psi | 77% | 2572 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 80% | 40,524 psi | 73% | 2556 fps | 97.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,162 psi | 74% | 2513 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,233 psi | 71% | 2592 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 46,746 psi | 85% | 2657 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,035 psi | 83% | 2644 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 35,781 psi | 65% | 2533 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,331 psi | 64% | 2470 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 44,730 psi | 81% | 2585 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,654 psi | 74% | 2572 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 37,101 psi | 67% | 2507 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 39,842 psi | 72% | 2569 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 31,140 psi | 56% | 2425 fps | 97.6% |
| Vihtavuori N560 | <<locked>> | 92% | 46,238 psi | 84% | 2785 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 98% | 45,339 psi | 82% | 2759 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,479 psi | 71% | 2536 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,336 psi | 75% | 2625 fps | 97.6% |
| Winchester StaBALL HD | 37.4 gr | 80% | 24,845 psi | 45% | 2329 fps | 96.7% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,494 psi | 71% | 2562 fps | 95.3% |
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 | 115gr | DTAC RBT Closed Nose - Boron Nitride. Winchester StaBALL HD delivers the highest muzzle velocity at 2,943 fps; across all powders the maximum-charge window runs from 1,749 fps to 2,943 fps. ADI AR 2225 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 66–90 %, leaving at least 10 % headroom. The 115.0 gr projectile in 0.243" calls for a 1:7.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Hodgdon H1000 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-26, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for .243 Ackley Improved with the .243 | 115gr | DTAC RBT Closed Nose - Boron Nitride 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.