Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 85gr | IBEX TRD bullet and 48 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 3100ᴾ | <<locked>> | 100% | 49,806 psi | 90% | 3123 fps | 97.5% |
| Accurate 4064 | <<locked>> | 82% | 49,792 psi | 90% | 3074 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 48,733 psi | 88% | 3133 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 84% | 48,921 psi | 89% | 3071 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 49,487 psi | 90% | 3100 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 82% | 49,748 psi | 90% | 3120 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 92% | 49,095 psi | 89% | 3186 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 88% | 49,864 psi | 90% | 3222 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,441 psi | 84% | 3143 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 49,008 psi | 89% | 3268 fps | 98.8% |
| Bofors RP3 | <<locked>> | 82% | 47,123 psi | 85% | 3061 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 82% | 47,703 psi | 86% | 3068 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 88% | 47,195 psi | 85% | 3110 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 49,081 psi | 89% | 3117 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,245 psi | 66% | 2024 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 48,588 psi | 88% | 3054 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 48,196 psi | 87% | 3048 fps | 95.9% |
| IMR 4831 | <<locked>> | 92% | 49,240 psi | 89% | 3127 fps | 98.8% |
| Lovex S062 | <<locked>> | 82% | 49,139 psi | 89% | 3064 fps | 99.9% |
| Lovex S065 | <<locked>> | 88% | 48,486 psi | 88% | 3054 fps | 97.5% |
| Lovex S070 | <<locked>> | 90% | 49,385 psi | 89% | 3091 fps | 96.6% |
| Norma 203B | <<locked>> | 82% | 49,066 psi | 89% | 3104 fps | 99.5% |
| Norma MRP | <<locked>> | 98% | 48,631 psi | 88% | 3215 fps | 96.1% |
| Norma URP | <<locked>> | 90% | 47,442 psi | 86% | 3114 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 82% | 48,950 psi | 89% | 3120 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 92% | 49,458 psi | 90% | 3163 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,883 psi | 67% | 2070 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 47,587 psi | 86% | 3038 fps | 96.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 49,414 psi | 89% | 3225 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 47,979 psi | 87% | 3146 fps | 98.4% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 46,992 psi | 85% | 3159 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 84% | 47,311 psi | 86% | 3058 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 48,486 psi | 88% | 3054 fps | 97.5% |
| Shooters World Precision | <<locked>> | 82% | 49,139 psi | 89% | 3064 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 90% | 49,385 psi | 89% | 3091 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 48,167 psi | 87% | 3110 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 48,472 psi | 88% | 2963 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 48,066 psi | 87% | 2992 fps | 96.1% |
| Somchem S355 | <<locked>> | 84% | 47,543 psi | 86% | 3054 fps | 99.5% |
| Somchem S365 | <<locked>> | 94% | 48,965 psi | 89% | 3182 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 48,486 psi | 88% | 3035 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 49,414 psi | 89% | 3114 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 49,574 psi | 90% | 3048 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 48,820 psi | 88% | 3114 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 98% | 48,776 psi | 88% | 3179 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 48,849 psi | 88% | 3074 fps | 99.8% |
| Winchester 760 | <<locked>> | 88% | 47,500 psi | 86% | 3117 fps | 96% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,337 psi | 77% | 3179 fps | 99.8% |
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>> | 94% | 41,133 psi | 74% | 2946 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 46,992 psi | 85% | 3022 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,317 psi | 64% | 2831 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 43,555 psi | 79% | 2959 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,019 psi | 80% | 2995 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,891 psi | 85% | 3064 fps | 98.9% |
| Alliant Reloder-16 | 37.7 gr | 82% | 36,448 psi | 66% | 2887 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,334 psi | 69% | 2963 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 88% | 32,445 psi | 59% | 2792 fps | 95.8% |
| Alliant Reloder-26 | 45.7 gr | 90% | 37,594 psi | 68% | 2992 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 44,454 psi | 80% | 3009 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 80% | 44,686 psi | 81% | 3002 fps | 97.4% |
| Hodgdon H414 | <<locked>> | 86% | 44,527 psi | 81% | 3051 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,952 psi | 58% | 2720 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,122 psi | 49% | 1811 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,788 psi | 83% | 2999 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 45,542 psi | 82% | 2992 fps | 95.2% |
| IMR 4831 | <<locked>> | 82% | 36,129 psi | 65% | 2838 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 46,079 psi | 83% | 3005 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 40,886 psi | 74% | 2890 fps | 95.5% |
| Lovex S070 | <<locked>> | 86% | 44,063 psi | 80% | 2979 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 46,282 psi | 84% | 3051 fps | 99.1% |
| Norma MRP | <<locked>> | 96% | 45,527 psi | 82% | 3146 fps | 95.1% |
| Norma URP | <<locked>> | 82% | 37,115 psi | 67% | 2877 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 45,832 psi | 83% | 3058 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 43,468 psi | 79% | 3038 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,760 psi | 50% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,657 psi | 81% | 2979 fps | 95.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,567 psi | 73% | 3035 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 36,985 psi | 67% | 2897 fps | 95.3% |
| ReloadSwiss RS 70 | 42.2 gr | 84% | 38,508 psi | 70% | 2953 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 41,989 psi | 76% | 2946 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 82% | 40,886 psi | 74% | 2890 fps | 95.5% |
| Shooters World Precision | <<locked>> | 80% | 46,079 psi | 83% | 3005 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 86% | 44,063 psi | 80% | 2979 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,264 psi | 76% | 2989 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,975 psi | 78% | 2864 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 45,339 psi | 82% | 2940 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 42,337 psi | 77% | 2946 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 31,705 psi | 57% | 2776 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 80% | 40,321 psi | 73% | 2871 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 36,158 psi | 65% | 2818 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 46,499 psi | 84% | 2995 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 38,247 psi | 69% | 2884 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 86% | 33,489 psi | 61% | 2825 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,476 psi | 64% | 2782 fps | 97.4% |
| Winchester 760 | <<locked>> | 86% | 44,527 psi | 81% | 3051 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 90% | 31,082 psi | 56% | 2828 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 48 powders for .243 Ackley Improved loaded with the .243 | 85gr | IBEX TRD. Alliant Reloder-26 delivers the highest muzzle velocity at 3,268 fps; across all powders the maximum-charge window runs from 2,024 fps to 3,268 fps. Accurate 3100 gives the best case fill at 100 %, and 48 of the 48 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 85.0 gr projectile in 0.243" calls for a 1:8.5 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, ReloadSwiss RS 70 rank at the top here: for .243 Ackley Improved with the .243 | 85gr | IBEX TRD 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.