Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 85gr | Nosler Partition bullet and 60 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 Somchem S365.
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% | 49,647 psi | 90% | 3054 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,819 psi | 87% | 3107 fps | 97.3% |
| Accurate 4064 | <<locked>> | 82% | 46,891 psi | 85% | 3051 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 46,630 psi | 84% | 3120 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 84% | 47,834 psi | 87% | 3074 fps | 99.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 49,110 psi | 89% | 3238 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 47,964 psi | 87% | 3100 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 82% | 48,211 psi | 87% | 3117 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 92% | 47,921 psi | 87% | 3189 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 88% | 48,791 psi | 88% | 3222 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,179 psi | 82% | 3140 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 47,950 psi | 87% | 3268 fps | 98.8% |
| Bofors RP3 | <<locked>> | 84% | 48,240 psi | 87% | 3110 fps | 99.9% |
| Bofors RP7 | <<locked>> | 88% | 48,660 psi | 88% | 3081 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 84% | 49,052 psi | 89% | 3120 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 90% | 49,269 psi | 89% | 3176 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 48,008 psi | 87% | 3120 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 49,821 psi | 90% | 3169 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 90% | 49,110 psi | 89% | 3199 fps | 96.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,810 psi | 65% | 2037 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 47,065 psi | 85% | 3051 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 82% | 49,763 psi | 90% | 3081 fps | 96.7% |
| IMR 4350 | <<locked>> | 92% | 49,182 psi | 89% | 3110 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 86% | 47,268 psi | 86% | 3054 fps | 96% |
| IMR 4831 | <<locked>> | 92% | 47,514 psi | 86% | 3120 fps | 98.7% |
| IMR 4895 | <<locked>> | 82% | 49,414 psi | 89% | 3150 fps | 99.6% |
| Lovex S062 | <<locked>> | 82% | 47,224 psi | 85% | 3054 fps | 99.9% |
| Lovex S065 | <<locked>> | 88% | 46,920 psi | 85% | 3051 fps | 97.4% |
| Lovex S070 | <<locked>> | 90% | 48,008 psi | 87% | 3091 fps | 96.6% |
| Norma 203B | <<locked>> | 82% | 47,558 psi | 86% | 3100 fps | 99.4% |
| Norma MRP | <<locked>> | 98% | 47,181 psi | 85% | 3209 fps | 96% |
| Norma URP | <<locked>> | 92% | 49,226 psi | 89% | 3169 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 82% | 47,718 psi | 86% | 3120 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 92% | 48,225 psi | 87% | 3163 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,318 psi | 66% | 2087 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 49,023 psi | 89% | 3097 fps | 97.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 48,153 psi | 87% | 3219 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 46,412 psi | 84% | 3136 fps | 98.3% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 49,153 psi | 89% | 3228 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 82% | 49,269 psi | 89% | 3077 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 86% | 48,443 psi | 88% | 3107 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 88% | 48,660 psi | 88% | 3081 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 46,920 psi | 85% | 3051 fps | 97.4% |
| Shooters World Precision | <<locked>> | 82% | 47,224 psi | 85% | 3054 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 90% | 48,008 psi | 87% | 3091 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 49,777 psi | 90% | 3163 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 47,007 psi | 85% | 2963 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 49,647 psi | 90% | 3051 fps | 96.7% |
| Somchem S355 | <<locked>> | 86% | 48,965 psi | 89% | 3110 fps | 99.8% |
| Somchem S365 | <<locked>> | 94% | 47,688 psi | 86% | 3176 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 48,994 psi | 89% | 3045 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 49,632 psi | 90% | 3058 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 49,995 psi | 90% | 3087 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 48,008 psi | 87% | 3107 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 48,008 psi | 87% | 3045 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 47,456 psi | 86% | 3110 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 98% | 46,949 psi | 85% | 3163 fps | 99.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 47,950 psi | 87% | 3084 fps | 99.9% |
| Winchester 760 | <<locked>> | 90% | 49,269 psi | 89% | 3176 fps | 96.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,524 psi | 73% | 3159 fps | 99.7% |
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 2495 | <<locked>> | 80% | 46,615 psi | 84% | 3002 fps | 100% |
| Accurate 3100 | <<locked>> | 96% | 41,756 psi | 76% | 2982 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 44,106 psi | 80% | 2999 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 35,259 psi | 64% | 2854 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 42,177 psi | 76% | 2956 fps | 98% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,861 psi | 83% | 3169 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,235 psi | 76% | 2982 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,107 psi | 82% | 3051 fps | 98.7% |
| Alliant Reloder-16 | 39.2 gr | 82% | 35,012 psi | 63% | 2874 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,695 psi | 66% | 2946 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,647 psi | 55% | 2759 fps | 95.1% |
| Alliant Reloder-26 | 48.5 gr | 92% | 38,406 psi | 70% | 3038 fps | 96% |
| Bofors RP3 | <<locked>> | 80% | 42,366 psi | 77% | 2989 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 45,542 psi | 82% | 3015 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 42,902 psi | 78% | 2992 fps | 97.2% |
| Hodgdon H414 | <<locked>> | 88% | 46,093 psi | 83% | 3110 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,095 psi | 54% | 2690 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,601 psi | 84% | 3110 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 45,571 psi | 82% | 3123 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,687 psi | 48% | 1827 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,324 psi | 80% | 2995 fps | 98.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,644 psi | 84% | 3018 fps | 95.9% |
| IMR 4350 | <<locked>> | 90% | 46,108 psi | 83% | 3048 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 44,295 psi | 80% | 2992 fps | 95.1% |
| IMR 4831 | <<locked>> | 84% | 36,405 psi | 66% | 2871 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 46,267 psi | 84% | 3087 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 44,483 psi | 80% | 2999 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 38,841 psi | 70% | 2871 fps | 95.1% |
| Lovex S070 | <<locked>> | 88% | 44,933 psi | 81% | 3028 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 44,483 psi | 80% | 3038 fps | 99% |
| Norma MRP | <<locked>> | 96% | 44,063 psi | 80% | 3140 fps | 95% |
| Norma URP | <<locked>> | 82% | 35,404 psi | 64% | 2861 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 44,643 psi | 81% | 3058 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 42,221 psi | 76% | 3031 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,195 psi | 49% | 1873 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,047 psi | 78% | 2969 fps | 95.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,015 psi | 71% | 3022 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 37,768 psi | 68% | 2943 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 39,697 psi | 72% | 3012 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 46,122 psi | 83% | 3015 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 39,711 psi | 72% | 2923 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 86% | 45,542 psi | 82% | 3015 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,841 psi | 70% | 2871 fps | 95.1% |
| Shooters World Precision | <<locked>> | 80% | 44,483 psi | 80% | 2999 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 44,933 psi | 81% | 3028 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,741 psi | 74% | 2979 fps | 98.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,582 psi | 75% | 2861 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 43,729 psi | 79% | 2933 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 40,364 psi | 73% | 2930 fps | 98.6% |
| Somchem S365 | 39 gr | 80% | 29,617 psi | 54% | 2736 fps | 96.5% |
| Vihtavuori N135 | <<locked>> | 80% | 46,035 psi | 83% | 2992 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,470 psi | 84% | 2999 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,392 psi | 69% | 2854 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 82% | 36,796 psi | 67% | 2861 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 44,976 psi | 81% | 2989 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 36,390 psi | 66% | 2861 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 88% | 33,533 psi | 61% | 2851 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,982 psi | 61% | 2769 fps | 97.2% |
| Winchester 760 | <<locked>> | 88% | 46,093 psi | 83% | 3110 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 92% | 31,067 psi | 56% | 2861 fps | 96.2% |
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 60 powders for .243 Ackley Improved loaded with the .243 | 85gr | Nosler Partition. Alliant Reloder-26 delivers the highest muzzle velocity at 3,268 fps; across all powders the maximum-charge window runs from 2,037 fps to 3,268 fps. Accurate 3100 gives the best case fill at 100 %, and 60 of the 60 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 85.0 gr projectile in 0.243" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Hodgdon TrailBoss 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, Somchem S365 rank at the top here: for .243 Ackley Improved with the .243 | 85gr | Nosler Partition 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.