Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 80gr | Barnes TTSX BT bullet and 68 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, ReloadSwiss RS 60 and Alliant Reloder-17.
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>> | 84% | 47,297 psi | 86% | 3104 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 47,572 psi | 86% | 3150 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 47,427 psi | 86% | 3212 fps | 98% |
| ADI AR 2206H | <<locked>> | 82% | 48,225 psi | 87% | 3179 fps | 99% |
| ADI AR 2208 | <<locked>> | 88% | 49,777 psi | 90% | 3189 fps | 98.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 47,790 psi | 86% | 3291 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 49,472 psi | 90% | 3209 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 86% | 49,792 psi | 90% | 3225 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 49,385 psi | 89% | 3294 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 90% | 46,702 psi | 85% | 3258 fps | 99.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,161 psi | 73% | 3097 fps | 98.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,426 psi | 82% | 3281 fps | 97.4% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 48,037 psi | 87% | 3186 fps | 98.2% |
| Bofors RP3 | <<locked>> | 88% | 49,574 psi | 90% | 3215 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 82% | 49,908 psi | 90% | 3215 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 86% | 47,311 psi | 86% | 3163 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 82% | 48,704 psi | 88% | 3192 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 48,907 psi | 89% | 3215 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 48,341 psi | 87% | 3225 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,346 psi | 64% | 2083 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 49,922 psi | 90% | 3199 fps | 99.5% |
| IMR 3031 | <<locked>> | 82% | 48,559 psi | 88% | 3192 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 48,863 psi | 88% | 3163 fps | 98.8% |
| IMR 4831 | <<locked>> | 96% | 48,573 psi | 88% | 3215 fps | 98.3% |
| IMR 4895 | <<locked>> | 84% | 47,979 psi | 87% | 3202 fps | 99.1% |
| Lovex D073.6 | <<locked>> | 82% | 47,630 psi | 86% | 3153 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 48,240 psi | 87% | 3114 fps | 99.1% |
| Lovex S062 | <<locked>> | 86% | 48,689 psi | 88% | 3163 fps | 99.7% |
| Lovex S065 | <<locked>> | 92% | 48,196 psi | 87% | 3150 fps | 96.9% |
| Lovex S070 | <<locked>> | 94% | 49,255 psi | 89% | 3189 fps | 96% |
| Norma 201 | <<locked>> | 82% | 47,152 psi | 85% | 3123 fps | 99.6% |
| Norma 202 | <<locked>> | 82% | 47,688 psi | 86% | 3136 fps | 100% |
| Norma 203B | <<locked>> | 86% | 49,052 psi | 89% | 3212 fps | 99.2% |
| Norma URP | <<locked>> | 94% | 47,384 psi | 86% | 3212 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 86% | 49,603 psi | 90% | 3235 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 96% | 49,545 psi | 90% | 3261 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,723 psi | 65% | 2129 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 47,892 psi | 87% | 3146 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 46,601 psi | 84% | 3225 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 49,821 psi | 90% | 3333 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 47,616 psi | 86% | 3238 fps | 97.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 47,413 psi | 86% | 3258 fps | 97.4% |
| Rottweil R 902 | <<locked>> | 84% | 47,529 psi | 86% | 3123 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 90% | 49,792 psi | 90% | 3212 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 48,196 psi | 87% | 3150 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 47,630 psi | 86% | 3153 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 48,689 psi | 88% | 3163 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 94% | 49,255 psi | 89% | 3189 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 48,385 psi | 88% | 3219 fps | 99.1% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 49,153 psi | 89% | 3169 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 46,891 psi | 85% | 3143 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 48,530 psi | 88% | 3077 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 48,979 psi | 89% | 3077 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 48,153 psi | 87% | 3074 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 48,892 psi | 88% | 3166 fps | 99.1% |
| Somchem S355 | <<locked>> | 88% | 47,108 psi | 85% | 3153 fps | 99.2% |
| Somchem S365 | <<locked>> | 98% | 48,602 psi | 88% | 3278 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 48,907 psi | 89% | 3068 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 47,355 psi | 86% | 3104 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 48,080 psi | 87% | 3114 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 48,370 psi | 88% | 3136 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 94% | 49,313 psi | 89% | 3209 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 86% | 49,705 psi | 90% | 3156 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 48,617 psi | 88% | 3212 fps | 98% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,193 psi | 80% | 3189 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 49,995 psi | 90% | 3192 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,969 psi | 65% | 3084 fps | 97.6% |
| Winchester StaBALL Match | <<locked>> | 82% | 46,383 psi | 84% | 3143 fps | 99.2% |
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% | 41,133 psi | 74% | 2986 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 38,899 psi | 70% | 2972 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 38,334 psi | 69% | 3012 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 45,324 psi | 82% | 3120 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 80% | 38,261 psi | 69% | 2933 fps | 96.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,495 psi | 75% | 3143 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,869 psi | 69% | 2956 fps | 97.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,959 psi | 74% | 3038 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 88% | 38,174 psi | 69% | 3031 fps | 95.6% |
| Alliant Reloder-17 | 40 gr | 80% | 32,793 psi | 59% | 2900 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 94% | 33,025 psi | 60% | 2900 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 96% | 38,957 psi | 70% | 3120 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,846 psi | 81% | 3117 fps | 97.6% |
| Bofors RP3 | <<locked>> | 80% | 37,652 psi | 68% | 2959 fps | 97.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,572 psi | 84% | 3153 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 82% | 41,379 psi | 75% | 3031 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 80% | 45,788 psi | 83% | 3133 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 32,779 psi | 59% | 2841 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,974 psi | 76% | 3091 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,266 psi | 48% | 1867 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,743 psi | 79% | 3071 fps | 98.7% |
| IMR 3031 | <<locked>> | 80% | 45,440 psi | 82% | 3133 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,161 psi | 73% | 2979 fps | 97% |
| IMR 4831 | <<locked>> | 88% | 36,927 psi | 67% | 2959 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 42,018 psi | 76% | 3074 fps | 97.9% |
| Lovex D073.6 | <<locked>> | 80% | 44,338 psi | 80% | 3091 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 45,092 psi | 82% | 3048 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 40,030 psi | 72% | 2982 fps | 98.6% |
| Lovex S065 | <<locked>> | 88% | 42,627 psi | 77% | 3031 fps | 95.4% |
| Lovex S070 | <<locked>> | 92% | 45,977 psi | 83% | 3120 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 43,990 psi | 80% | 3061 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 44,440 psi | 80% | 3074 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,321 psi | 73% | 3025 fps | 97.5% |
| Norma URP | <<locked>> | 88% | 38,421 psi | 70% | 3012 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 40,176 psi | 73% | 3035 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 92% | 43,134 psi | 78% | 3123 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,426 psi | 48% | 1906 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 44,744 psi | 81% | 3077 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,279 psi | 78% | 3153 fps | 97.6% |
| ReloadSwiss RS 60 | 40 gr | 80% | 34,998 psi | 63% | 2986 fps | 98.6% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 38,247 psi | 69% | 3028 fps | 95.1% |
| ReloadSwiss RS 70 | 45.7 gr | 90% | 40,973 psi | 74% | 3107 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 41,901 psi | 76% | 3005 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 80% | 35,404 psi | 64% | 2894 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 42,627 psi | 77% | 3031 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,338 psi | 80% | 3091 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 40,030 psi | 72% | 2982 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 92% | 45,977 psi | 83% | 3120 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,506 psi | 66% | 2949 fps | 96.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,556 psi | 82% | 3094 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,801 psi | 79% | 3077 fps | 98.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,527 psi | 82% | 3022 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,884 psi | 69% | 2858 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 45,005 psi | 81% | 3015 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,614 psi | 83% | 3097 fps | 98.6% |
| Somchem S355 | <<locked>> | 80% | 36,056 psi | 65% | 2900 fps | 96.7% |
| Somchem S365 | <<locked>> | 84% | 30,023 psi | 54% | 2818 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 45,934 psi | 83% | 3015 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,524 psi | 75% | 2995 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,366 psi | 77% | 3002 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,563 psi | 63% | 2835 fps | 97.7% |
| Vihtavuori N160 | <<locked>> | 86% | 37,536 psi | 68% | 2953 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 40,770 psi | 74% | 2982 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 39,726 psi | 72% | 3015 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 94% | 35,882 psi | 65% | 2992 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 32,851 psi | 59% | 2799 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 33,562 psi | 61% | 3002 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,294 psi | 78% | 3081 fps | 98.7% |
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 68 powders for .243 Ackley Improved loaded with the .243 | 80gr | Barnes TTSX BT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,333 fps; across all powders the maximum-charge window runs from 2,083 fps to 3,333 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 68 of the 68 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (381 MPa), the top charges use 64–90 %, leaving at least 10 % headroom. The 80.0 gr projectile in 0.243" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, 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. ReloadSwiss RS 70, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .243 Ackley Improved with the .243 | 80gr | Barnes TTSX BT 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.