Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 75gr | Ferrobull Entox Sport bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 60 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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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 2495 | <<locked>> | 86% | 49,487 psi | 90% | 3235 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 49,588 psi | 90% | 3281 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 49,850 psi | 90% | 3346 fps | 98% |
| ADI AR 2206H | <<locked>> | 82% | 47,137 psi | 85% | 3248 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 88% | 48,573 psi | 88% | 3255 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 49,400 psi | 89% | 3261 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 82% | 49,792 psi | 90% | 3255 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 49,995 psi | 90% | 3425 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 48,472 psi | 88% | 3281 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 86% | 48,820 psi | 88% | 3297 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 96% | 48,457 psi | 88% | 3360 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 92% | 49,008 psi | 89% | 3396 fps | 99.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,189 psi | 71% | 3153 fps | 97.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,251 psi | 80% | 3330 fps | 96.4% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 46,978 psi | 85% | 3248 fps | 97.6% |
| Bofors RP3 | <<locked>> | 88% | 48,414 psi | 88% | 3284 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 82% | 48,892 psi | 88% | 3287 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 88% | 49,603 psi | 90% | 3294 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 82% | 47,572 psi | 86% | 3261 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 47,834 psi | 87% | 3281 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 46,891 psi | 85% | 3284 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,259 psi | 64% | 2156 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 49,095 psi | 89% | 3271 fps | 99.1% |
| IMR 3031 | <<locked>> | 82% | 47,427 psi | 86% | 3268 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 48,051 psi | 87% | 3238 fps | 98.3% |
| IMR 4831 | <<locked>> | 96% | 47,456 psi | 86% | 3281 fps | 97.7% |
| IMR 4895 | <<locked>> | 84% | 46,775 psi | 85% | 3268 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 82% | 49,400 psi | 89% | 3261 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 82% | 46,673 psi | 84% | 3228 fps | 99.9% |
| Lovex S060 | <<locked>> | 82% | 47,340 psi | 86% | 3182 fps | 98.6% |
| Lovex S062 | <<locked>> | 86% | 47,834 psi | 87% | 3238 fps | 99.5% |
| Lovex S065 | <<locked>> | 92% | 47,137 psi | 85% | 3212 fps | 96.1% |
| Norma 201 | <<locked>> | 84% | 49,066 psi | 89% | 3251 fps | 99.6% |
| Norma 202 | <<locked>> | 84% | 49,588 psi | 90% | 3264 fps | 100% |
| Norma 203B | <<locked>> | 86% | 48,080 psi | 87% | 3281 fps | 98.7% |
| Norma URP | <<locked>> | 96% | 49,400 psi | 89% | 3340 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 86% | 48,356 psi | 88% | 3297 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 96% | 48,341 psi | 87% | 3320 fps | 96% |
| Ramshot TAC | <<locked>> | 82% | 49,908 psi | 90% | 3264 fps | 96.9% |
| Ramshot Wild Boar | <<locked>> | 82% | 49,400 psi | 89% | 3287 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,592 psi | 64% | 2205 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 48,936 psi | 89% | 3363 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 48,762 psi | 88% | 3402 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 49,763 psi | 90% | 3366 fps | 97.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 49,574 psi | 90% | 3389 fps | 97.4% |
| Rottweil R 901 | <<locked>> | 82% | 49,777 psi | 90% | 3245 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 49,734 psi | 90% | 3258 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 90% | 48,602 psi | 88% | 3281 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 47,137 psi | 85% | 3212 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 82% | 46,673 psi | 84% | 3228 fps | 99.9% |
| Shooters World Precision | <<locked>> | 86% | 47,834 psi | 87% | 3238 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 47,195 psi | 85% | 3281 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 48,138 psi | 87% | 3235 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 49,226 psi | 89% | 3278 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 47,688 psi | 86% | 3153 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 47,892 psi | 87% | 3146 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 47,195 psi | 85% | 3146 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 47,819 psi | 87% | 3232 fps | 98.6% |
| Somchem S355 | <<locked>> | 90% | 49,124 psi | 89% | 3284 fps | 99.2% |
| Somchem S365 | <<locked>> | 98% | 47,340 psi | 86% | 3343 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 82% | 48,022 psi | 87% | 3146 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 49,313 psi | 89% | 3232 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 47,253 psi | 86% | 3189 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 47,297 psi | 86% | 3205 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 94% | 48,327 psi | 87% | 3278 fps | 97.6% |
| Vihtavuori N530 | <<locked>> | 82% | 49,879 psi | 90% | 3264 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 86% | 48,733 psi | 88% | 3232 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 47,529 psi | 86% | 3274 fps | 97.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,931 psi | 78% | 3241 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 48,820 psi | 88% | 3255 fps | 99.4% |
| Winchester 748 | <<locked>> | 82% | 49,690 psi | 90% | 3310 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 48,631 psi | 88% | 3278 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% | 40,132 psi | 73% | 3054 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 37,971 psi | 69% | 3035 fps | 99.5% |
| Accurate 4350 | <<locked>> | 90% | 39,856 psi | 72% | 3130 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 44,353 psi | 80% | 3186 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 80% | 37,521 psi | 68% | 2999 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,514 psi | 84% | 3205 fps | 99.2% |
| Alliant AR-Comp | <<locked>> | 80% | 46,615 psi | 84% | 3202 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,350 psi | 73% | 3196 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,999 psi | 67% | 3018 fps | 96.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,016 psi | 72% | 3097 fps | 96.3% |
| Alliant Reloder-16 | 42.8 gr | 90% | 39,740 psi | 72% | 3150 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 82% | 34,418 psi | 62% | 3028 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 34,403 psi | 62% | 3015 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 40,872 psi | 74% | 3245 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,642 psi | 79% | 3176 fps | 96.8% |
| Bofors RP3 | <<locked>> | 80% | 36,651 psi | 66% | 3018 fps | 96.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,339 psi | 82% | 3215 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 84% | 43,178 psi | 78% | 3159 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 80% | 44,759 psi | 81% | 3199 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 34,200 psi | 62% | 2959 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,799 psi | 74% | 3153 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,121 psi | 47% | 1932 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,815 psi | 77% | 3140 fps | 98.1% |
| IMR 3031 | <<locked>> | 80% | 44,063 psi | 80% | 3199 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,334 psi | 71% | 3041 fps | 96.2% |
| IMR 4831 | <<locked>> | 90% | 38,638 psi | 70% | 3081 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 40,988 psi | 74% | 3133 fps | 97.2% |
| IMR 8208 XBR | <<locked>> | 80% | 46,514 psi | 84% | 3205 fps | 99.2% |
| Lovex D073.6 | <<locked>> | 80% | 43,497 psi | 79% | 3163 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 44,280 psi | 80% | 3120 fps | 98% |
| Lovex S062 | <<locked>> | 80% | 39,175 psi | 71% | 3045 fps | 97.9% |
| Lovex S065 | <<locked>> | 90% | 44,367 psi | 80% | 3153 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 43,120 psi | 78% | 3130 fps | 98.7% |
| Norma 202 | <<locked>> | 80% | 43,482 psi | 79% | 3143 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 39,392 psi | 71% | 3084 fps | 96.7% |
| Norma URP | <<locked>> | 90% | 40,248 psi | 73% | 3140 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 39,030 psi | 71% | 3091 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 94% | 45,165 psi | 82% | 3251 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 46,441 psi | 84% | 3196 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,905 psi | 83% | 3219 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,237 psi | 47% | 1972 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,032 psi | 76% | 3212 fps | 96.7% |
| ReloadSwiss RS 60 | 41 gr | 80% | 34,258 psi | 62% | 3041 fps | 97.8% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 39,842 psi | 72% | 3150 fps | 95% |
| ReloadSwiss RS 70 | 47.9 gr | 92% | 43,207 psi | 78% | 3241 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 46,862 psi | 85% | 3189 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,075 psi | 74% | 3071 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 80% | 34,258 psi | 62% | 2946 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 44,367 psi | 80% | 3153 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,497 psi | 79% | 3163 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 39,175 psi | 71% | 3045 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,505 psi | 64% | 3002 fps | 95.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,657 psi | 81% | 3163 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,757 psi | 77% | 3140 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,454 psi | 80% | 3091 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,898 psi | 67% | 2920 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 44,164 psi | 80% | 3087 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,396 psi | 80% | 3159 fps | 97.9% |
| Somchem S355 | <<locked>> | 80% | 35,230 psi | 64% | 2959 fps | 95.8% |
| Somchem S365 | <<locked>> | 86% | 31,285 psi | 57% | 2933 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 44,817 psi | 81% | 3087 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,335 psi | 73% | 3061 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,147 psi | 74% | 3068 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 33,460 psi | 61% | 2884 fps | 96.7% |
| Vihtavuori N160 | <<locked>> | 88% | 39,392 psi | 71% | 3077 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 46,543 psi | 84% | 3196 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 80% | 39,798 psi | 72% | 3045 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 90% | 41,466 psi | 75% | 3140 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 96% | 37,362 psi | 68% | 3107 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 34,330 psi | 62% | 2917 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 46,369 psi | 84% | 3245 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,453 psi | 77% | 3146 fps | 98.1% |
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 72 powders for .243 Ackley Improved loaded with the .243 | 75gr | Ferrobull Entox Sport. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,425 fps; across all powders the maximum-charge window runs from 2,156 fps to 3,425 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 72 of the 72 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 75.0 gr projectile in 0.243" calls for a 1:10.0 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. Alliant Reloder-16, ReloadSwiss RS 60, ReloadSwiss RS 70 rank at the top here: for .243 Ackley Improved with the .243 | 75gr | Ferrobull Entox Sport 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.