Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 90gr | Nosler AccuBond bullet and 61 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Alliant Reloder-16 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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 48,646 psi | 88% | 2959 fps | 96% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,269 psi | 87% | 3038 fps | 97.8% |
| Accurate 4064 | <<locked>> | 82% | 47,282 psi | 86% | 2972 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 47,268 psi | 86% | 3051 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 84% | 47,950 psi | 87% | 2995 fps | 99.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 49,559 psi | 90% | 3163 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 48,501 psi | 88% | 3025 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 82% | 48,689 psi | 88% | 3041 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 92% | 48,501 psi | 88% | 3117 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 88% | 48,834 psi | 88% | 3143 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,440 psi | 82% | 3068 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,726 psi | 72% | 2949 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 47,993 psi | 87% | 3192 fps | 99.1% |
| Bofors RP3 | <<locked>> | 84% | 48,559 psi | 88% | 3031 fps | 99.9% |
| Bofors RP7 | <<locked>> | 88% | 48,689 psi | 88% | 3002 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 84% | 49,400 psi | 89% | 3045 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 90% | 49,676 psi | 90% | 3104 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 48,327 psi | 87% | 3041 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 90% | 49,487 psi | 90% | 3127 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,027 psi | 65% | 1975 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 47,413 psi | 86% | 2976 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 82% | 49,908 psi | 90% | 3002 fps | 97.1% |
| IMR 4350 | <<locked>> | 92% | 49,501 psi | 90% | 3035 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 47,543 psi | 86% | 2982 fps | 96.5% |
| IMR 4831 | <<locked>> | 92% | 47,863 psi | 87% | 3045 fps | 99% |
| IMR 4895 | <<locked>> | 82% | 49,951 psi | 90% | 3074 fps | 99.8% |
| Lovex S062 | <<locked>> | 82% | 47,587 psi | 86% | 2979 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 47,282 psi | 86% | 2979 fps | 97.8% |
| Lovex S070 | <<locked>> | 90% | 48,167 psi | 87% | 3015 fps | 97% |
| Norma 203B | <<locked>> | 82% | 48,037 psi | 87% | 3028 fps | 99.6% |
| Norma MRP | <<locked>> | 98% | 47,732 psi | 86% | 3146 fps | 96.7% |
| Norma URP | <<locked>> | 92% | 49,530 psi | 90% | 3097 fps | 99.2% |
| Ramshot Big Game | <<locked>> | 82% | 48,167 psi | 87% | 3045 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 92% | 48,414 psi | 88% | 3084 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,579 psi | 66% | 2021 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 49,429 psi | 89% | 3022 fps | 97.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 48,776 psi | 88% | 3150 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 46,920 psi | 85% | 3068 fps | 98.7% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 49,124 psi | 89% | 3150 fps | 98.9% |
| Rottweil R 902 | <<locked>> | 82% | 49,603 psi | 90% | 2999 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 48,776 psi | 88% | 3028 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 88% | 48,689 psi | 88% | 3002 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 47,282 psi | 86% | 2979 fps | 97.8% |
| Shooters World Precision | <<locked>> | 82% | 47,587 psi | 86% | 2979 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 48,167 psi | 87% | 3015 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 46,992 psi | 85% | 3031 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 47,340 psi | 86% | 2884 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 49,879 psi | 90% | 2976 fps | 97.2% |
| Somchem S355 | <<locked>> | 86% | 49,211 psi | 89% | 3031 fps | 99.9% |
| Somchem S365 | <<locked>> | 94% | 48,182 psi | 87% | 3104 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 47,659 psi | 86% | 3028 fps | 96% |
| Vihtavuori N135 | <<locked>> | 82% | 49,255 psi | 89% | 2963 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 49,792 psi | 90% | 2976 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 47,094 psi | 85% | 2953 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 48,602 psi | 88% | 3038 fps | 99% |
| Vihtavuori N540 | <<locked>> | 82% | 48,269 psi | 87% | 2966 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 47,819 psi | 87% | 3038 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 98% | 47,253 psi | 86% | 3091 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 48,182 psi | 87% | 3009 fps | 99.9% |
| Winchester 760 | <<locked>> | 90% | 49,676 psi | 90% | 3104 fps | 97.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,770 psi | 74% | 3094 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 2700 | <<locked>> | 80% | 45,513 psi | 82% | 2900 fps | 95.2% |
| Accurate 3100 | <<locked>> | 94% | 39,015 psi | 71% | 2851 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 44,411 psi | 80% | 2923 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,170 psi | 60% | 2730 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 42,424 psi | 77% | 2881 fps | 98.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,195 psi | 84% | 3097 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,540 psi | 77% | 2907 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,498 psi | 82% | 2979 fps | 99.1% |
| Alliant Reloder-16 | 37.8 gr | 82% | 35,041 psi | 63% | 2802 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,173 psi | 67% | 2884 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,908 psi | 56% | 2703 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 98% | 37,376 psi | 68% | 2887 fps | 95.1% |
| Alliant Reloder-26 | 45.9 gr | 90% | 36,100 psi | 65% | 2907 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 42,496 psi | 77% | 2913 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 45,818 psi | 83% | 2943 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 43,033 psi | 78% | 2917 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 43,279 psi | 78% | 2972 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,501 psi | 55% | 2635 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 88% | 45,861 psi | 83% | 3051 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,861 psi | 49% | 1768 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,585 psi | 81% | 2920 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,036 psi | 85% | 2946 fps | 96.5% |
| IMR 4350 | <<locked>> | 90% | 46,325 psi | 84% | 2976 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 44,440 psi | 80% | 2917 fps | 95.6% |
| IMR 4831 | <<locked>> | 82% | 34,374 psi | 62% | 2746 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 46,673 psi | 84% | 3012 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 44,744 psi | 81% | 2923 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 39,160 psi | 71% | 2805 fps | 95.7% |
| Lovex S070 | <<locked>> | 86% | 42,395 psi | 77% | 2897 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 44,875 psi | 81% | 2966 fps | 99.3% |
| Norma MRP | <<locked>> | 96% | 44,512 psi | 81% | 3074 fps | 95.7% |
| Norma URP | <<locked>> | 82% | 35,534 psi | 64% | 2789 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 44,976 psi | 81% | 2982 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 39,653 psi | 72% | 2897 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,151 psi | 49% | 1808 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,279 psi | 78% | 2897 fps | 96.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,537 psi | 72% | 2956 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 35,302 psi | 64% | 2805 fps | 95.4% |
| ReloadSwiss RS 70 | 42.4 gr | 84% | 37,362 psi | 68% | 2877 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 46,673 psi | 84% | 2943 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 40,045 psi | 72% | 2854 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 45,818 psi | 83% | 2943 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 82% | 39,160 psi | 71% | 2805 fps | 95.7% |
| Shooters World Precision | <<locked>> | 80% | 44,744 psi | 81% | 2923 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 42,395 psi | 77% | 2897 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,234 psi | 75% | 2910 fps | 98.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,003 psi | 76% | 2789 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 43,787 psi | 79% | 2861 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 40,640 psi | 74% | 2861 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 29,907 psi | 54% | 2677 fps | 97.2% |
| Somchem S385 | <<locked>> | 94% | 44,483 psi | 80% | 2963 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 46,572 psi | 84% | 2917 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,804 psi | 85% | 2923 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,682 psi | 70% | 2785 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 34,664 psi | 63% | 2733 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 45,092 psi | 82% | 2910 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,171 psi | 62% | 2733 fps | 95% |
| Vihtavuori N555 | <<locked>> | 86% | 31,720 psi | 57% | 2730 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,258 psi | 62% | 2707 fps | 97.7% |
| Winchester 760 | <<locked>> | 86% | 43,569 psi | 79% | 2979 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 90% | 29,196 psi | 53% | 2730 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 61 powders for .243 Ackley Improved loaded with the .243 | 90gr | Nosler AccuBond. Alliant Reloder-26 delivers the highest muzzle velocity at 3,192 fps; across all powders the maximum-charge window runs from 1,975 fps to 3,192 fps. Accurate 3100 gives the best case fill at 100 %, and 61 of the 61 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 90.0 gr projectile in 0.243" calls for a 1:9.0 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-26, Alliant Reloder-16, ReloadSwiss RS 70 rank at the top here: for .243 Ackley Improved with the .243 | 90gr | Nosler AccuBond 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.