Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 105gr | Berger VLD Target bullet and 62 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and ReloadSwiss RS 70.
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>> | 96% | 47,587 psi | 86% | 2835 fps | 98.9% |
| Accurate 4350 | <<locked>> | 88% | 49,240 psi | 89% | 2881 fps | 99.8% |
| Accurate High Country | <<locked>> | 94% | 48,182 psi | 87% | 2959 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 82% | 49,182 psi | 89% | 2815 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 92% | 47,369 psi | 86% | 2867 fps | 96.5% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 47,369 psi | 86% | 2864 fps | 96.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 47,369 psi | 86% | 2864 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 49,835 psi | 90% | 2838 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 47,297 psi | 86% | 2890 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 84% | 47,645 psi | 86% | 2910 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 49,821 psi | 90% | 2913 fps | 97.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 47,123 psi | 85% | 2907 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 47,805 psi | 87% | 2910 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,527 psi | 81% | 2887 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 94% | 47,210 psi | 85% | 2976 fps | 99.8% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,472 psi | 90% | 2949 fps | 97.2% |
| Bofors RP5 | <<locked>> | 96% | 47,123 psi | 85% | 2907 fps | 96.8% |
| Bofors RP7 | <<locked>> | 84% | 46,934 psi | 85% | 2776 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 86% | 48,022 psi | 87% | 2874 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 84% | 48,182 psi | 87% | 2835 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 47,384 psi | 86% | 2822 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,584 psi | 79% | 2913 fps | 96.3% |
| Hodgdon Superformance | <<locked>> | 86% | 47,471 psi | 86% | 2897 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,506 psi | 66% | 1834 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 47,877 psi | 87% | 2815 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 48,559 psi | 88% | 2812 fps | 98.2% |
| IMR 4831 | <<locked>> | 88% | 46,978 psi | 85% | 2828 fps | 99.7% |
| Lovex S065 | <<locked>> | 86% | 48,588 psi | 88% | 2808 fps | 99.2% |
| Lovex S070 | <<locked>> | 88% | 49,821 psi | 90% | 2851 fps | 98.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,237 psi | 82% | 2792 fps | 98.5% |
| Norma 204 | <<locked>> | 88% | 48,153 psi | 87% | 2858 fps | 96.6% |
| Norma MRP | <<locked>> | 96% | 49,980 psi | 90% | 2995 fps | 98.7% |
| Norma URP | <<locked>> | 88% | 48,515 psi | 88% | 2874 fps | 99.8% |
| Ramshot Grand | <<locked>> | 98% | 49,327 psi | 89% | 2953 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 88% | 47,355 psi | 86% | 2867 fps | 98.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,224 psi | 85% | 2890 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,173 psi | 67% | 1877 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 47,123 psi | 85% | 2904 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 49,182 psi | 89% | 2904 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 47,703 psi | 86% | 2927 fps | 99.6% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,584 psi | 79% | 2907 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 82% | 47,355 psi | 86% | 2795 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 49,081 psi | 89% | 2897 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 84% | 46,934 psi | 85% | 2776 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 48,588 psi | 88% | 2808 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 88% | 49,821 psi | 90% | 2851 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 48,704 psi | 88% | 2854 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 48,704 psi | 88% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 48,095 psi | 87% | 2756 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 48,631 psi | 88% | 2890 fps | 97.1% |
| Somchem S355 | <<locked>> | 82% | 47,587 psi | 86% | 2795 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 47,456 psi | 86% | 2877 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 49,777 psi | 90% | 2877 fps | 98.1% |
| Vihtavuori N150 | <<locked>> | 84% | 48,443 psi | 88% | 2772 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 47,152 psi | 85% | 2812 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 98% | 49,052 psi | 89% | 2851 fps | 97.6% |
| Vihtavuori N550 | <<locked>> | 88% | 49,472 psi | 90% | 2871 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 94% | 47,123 psi | 85% | 2884 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 49,530 psi | 90% | 2831 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 48,370 psi | 88% | 2881 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,064 psi | 83% | 3018 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 49,617 psi | 90% | 2867 fps | 97.1% |
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>> | 86% | 33,736 psi | 61% | 2546 fps | 95.2% |
| Accurate 4350 | <<locked>> | 80% | 37,449 psi | 68% | 2651 fps | 98.2% |
| Accurate High Country | <<locked>> | 92% | 45,136 psi | 82% | 2900 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 46,253 psi | 84% | 2762 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 44,135 psi | 80% | 2802 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 44,512 psi | 81% | 2808 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 44,512 psi | 81% | 2808 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,789 psi | 85% | 2789 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,390 psi | 66% | 2657 fps | 98.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,263 psi | 75% | 2785 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,990 psi | 80% | 2799 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 41,495 psi | 75% | 2792 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,774 psi | 48% | 2408 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,256 psi | 58% | 2582 fps | 95% |
| Alliant Reloder-26 | 41 gr | 82% | 30,603 psi | 55% | 2579 fps | 95.2% |
| Bofors RP15 | <<locked>> | 96% | 43,555 psi | 79% | 2835 fps | 95.6% |
| Bofors RP5 | <<locked>> | 92% | 41,495 psi | 75% | 2792 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 41,452 psi | 75% | 2667 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 80% | 39,450 psi | 71% | 2697 fps | 96.1% |
| Hodgdon H4350 | <<locked>> | 80% | 42,293 psi | 77% | 2720 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,026 psi | 62% | 2552 fps | 98.7% |
| Hodgdon Retumbo | <<locked>> | 98% | 40,683 psi | 74% | 2841 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 38,479 psi | 70% | 2707 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 49% | 1634 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 39,523 psi | 72% | 2644 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,004 psi | 78% | 2700 fps | 97% |
| IMR 4831 | <<locked>> | 80% | 36,129 psi | 65% | 2605 fps | 97.9% |
| Lovex S065 | <<locked>> | 80% | 40,466 psi | 73% | 2648 fps | 97.7% |
| Lovex S070 | <<locked>> | 80% | 38,682 psi | 70% | 2628 fps | 96.1% |
| Lovex S071 | <<locked>> | 92% | 34,998 psi | 63% | 2579 fps | 95.7% |
| Norma 204 | <<locked>> | 86% | 44,831 psi | 81% | 2795 fps | 95.7% |
| Norma MRP | 42.7 gr | 88% | 37,869 psi | 69% | 2740 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 37,246 psi | 67% | 2644 fps | 98% |
| Ramshot Grand | <<locked>> | 96% | 45,818 psi | 83% | 2884 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 36,071 psi | 65% | 2628 fps | 95.9% |
| Ramshot Magnum | <<locked>> | 96% | 40,683 psi | 74% | 2756 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,775 psi | 50% | 1680 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,859 psi | 79% | 2841 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,217 psi | 67% | 2667 fps | 97.8% |
| ReloadSwiss RS 70 | 39.6 gr | 80% | 36,071 psi | 65% | 2667 fps | 97.1% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 37,869 psi | 69% | 2766 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 44,396 psi | 80% | 2746 fps | 100% |
| Rottweil R 905 | <<locked>> | 90% | 42,801 psi | 77% | 2776 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 41,452 psi | 75% | 2667 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,466 psi | 73% | 2648 fps | 97.7% |
| Shooters World SW4350 | <<locked>> | 80% | 38,682 psi | 70% | 2628 fps | 96.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,469 psi | 82% | 2795 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,716 psi | 83% | 2651 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,624 psi | 72% | 2592 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 42,395 psi | 77% | 2769 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 44,701 psi | 81% | 2743 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 33,692 psi | 61% | 2602 fps | 99.6% |
| Somchem S385 | <<locked>> | 86% | 38,159 psi | 69% | 2644 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 42,699 psi | 77% | 2671 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,638 psi | 70% | 2644 fps | 98.3% |
| Vihtavuori N165 | <<locked>> | 92% | 40,190 psi | 73% | 2680 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 38,072 psi | 69% | 2644 fps | 98% |
| Vihtavuori N555 | <<locked>> | 80% | 29,530 psi | 53% | 2487 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,695 psi | 68% | 2612 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 39,450 psi | 71% | 2697 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,280 psi | 46% | 2431 fps | 95.4% |
| Winchester Supreme 780 | <<locked>> | 92% | 43,178 psi | 78% | 2746 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 62 powders for .243 Ackley Improved loaded with the .243 | 105gr | Berger VLD Target. Winchester StaBALL HD delivers the highest muzzle velocity at 3,018 fps; across all powders the maximum-charge window runs from 1,834 fps to 3,018 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 62 of the 62 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 105.0 gr projectile in 0.243" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Bofors RP15, Hodgdon Retumbo 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, Norma MRP, ReloadSwiss RS 70 rank at the top here: for .243 Ackley Improved with the .243 | 105gr | Berger VLD Target 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.