Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 75gr | Hornady V-MAX bullet and 65 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 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 2495 | <<locked>> | 84% | 47,993 psi | 87% | 3202 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 48,022 psi | 87% | 3245 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 47,906 psi | 87% | 3304 fps | 97.6% |
| ADI AR 2206H | <<locked>> | 82% | 48,399 psi | 88% | 3268 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 88% | 49,690 psi | 90% | 3271 fps | 98.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 47,543 psi | 86% | 3366 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 49,443 psi | 89% | 3294 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 86% | 49,777 psi | 90% | 3310 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 96% | 49,284 psi | 89% | 3373 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 90% | 46,659 psi | 84% | 3343 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,161 psi | 73% | 3173 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,368 psi | 82% | 3353 fps | 96.8% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 47,863 psi | 87% | 3261 fps | 97.8% |
| Bofors RP3 | <<locked>> | 88% | 49,908 psi | 90% | 3307 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 82% | 49,864 psi | 90% | 3301 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 86% | 47,616 psi | 86% | 3251 fps | 97% |
| Hodgdon H4895 | <<locked>> | 82% | 48,834 psi | 88% | 3281 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 48,776 psi | 88% | 3297 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 48,124 psi | 87% | 3307 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,259 psi | 64% | 2152 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 49,850 psi | 90% | 3284 fps | 99.2% |
| IMR 3031 | <<locked>> | 82% | 48,385 psi | 88% | 3278 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 48,892 psi | 88% | 3248 fps | 98.5% |
| IMR 4831 | <<locked>> | 96% | 48,544 psi | 88% | 3297 fps | 97.9% |
| IMR 4895 | <<locked>> | 84% | 48,080 psi | 87% | 3287 fps | 98.7% |
| Lovex D073.6 | <<locked>> | 82% | 47,819 psi | 87% | 3241 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 48,080 psi | 87% | 3196 fps | 98.7% |
| Lovex S062 | <<locked>> | 86% | 48,849 psi | 88% | 3251 fps | 99.6% |
| Lovex S065 | <<locked>> | 92% | 48,457 psi | 88% | 3235 fps | 96.4% |
| Norma 201 | <<locked>> | 82% | 47,210 psi | 85% | 3209 fps | 99.4% |
| Norma 202 | <<locked>> | 82% | 47,587 psi | 86% | 3222 fps | 100% |
| Norma 203B | <<locked>> | 86% | 49,023 psi | 89% | 3297 fps | 98.9% |
| Norma URP | <<locked>> | 94% | 47,384 psi | 86% | 3294 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 86% | 49,603 psi | 90% | 3320 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 96% | 49,603 psi | 90% | 3343 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,955 psi | 65% | 2205 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 49,951 psi | 90% | 3379 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 49,705 psi | 90% | 3419 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 47,442 psi | 86% | 3317 fps | 97.3% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 47,181 psi | 85% | 3330 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 84% | 47,877 psi | 87% | 3212 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 90% | 49,792 psi | 90% | 3297 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 48,457 psi | 88% | 3235 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 82% | 47,819 psi | 87% | 3241 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 48,849 psi | 88% | 3251 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 48,138 psi | 87% | 3297 fps | 98.7% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 49,197 psi | 89% | 3251 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 46,905 psi | 85% | 3225 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 48,530 psi | 88% | 3163 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 49,023 psi | 89% | 3163 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 48,167 psi | 87% | 3159 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 48,733 psi | 88% | 3245 fps | 98.7% |
| Somchem S355 | <<locked>> | 88% | 47,224 psi | 85% | 3238 fps | 98.9% |
| Somchem S365 | <<locked>> | 98% | 48,428 psi | 88% | 3360 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 82% | 48,791 psi | 88% | 3156 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 47,311 psi | 86% | 3192 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 48,138 psi | 87% | 3202 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 48,283 psi | 87% | 3219 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 94% | 49,617 psi | 90% | 3297 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 86% | 49,980 psi | 90% | 3248 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 48,588 psi | 88% | 3291 fps | 97.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,179 psi | 80% | 3264 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 49,676 psi | 90% | 3268 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,260 psi | 66% | 3156 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 49,893 psi | 90% | 3297 fps | 99.3% |
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% | 41,974 psi | 76% | 3084 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 39,668 psi | 72% | 3068 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 41,423 psi | 75% | 3163 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 45,266 psi | 82% | 3199 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 80% | 38,551 psi | 70% | 3022 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,510 psi | 75% | 3222 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,232 psi | 69% | 3045 fps | 97.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,973 psi | 74% | 3114 fps | 96.5% |
| Alliant Reloder-16 | <<locked>> | 90% | 40,886 psi | 74% | 3176 fps | 95.9% |
| Alliant Reloder-17 | 42 gr | 82% | 35,578 psi | 64% | 3058 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 35,404 psi | 64% | 3041 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 42,264 psi | 76% | 3278 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,788 psi | 81% | 3199 fps | 97.1% |
| Bofors RP3 | <<locked>> | 80% | 37,826 psi | 68% | 3041 fps | 97.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,673 psi | 84% | 3238 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 82% | 41,611 psi | 75% | 3114 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 45,716 psi | 83% | 3215 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 35,128 psi | 64% | 2982 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,018 psi | 76% | 3176 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,165 psi | 47% | 1926 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,903 psi | 79% | 3159 fps | 98.3% |
| IMR 3031 | <<locked>> | 80% | 45,382 psi | 82% | 3222 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,480 psi | 73% | 3064 fps | 96.5% |
| IMR 4831 | <<locked>> | 90% | 39,711 psi | 72% | 3104 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 42,003 psi | 76% | 3156 fps | 97.5% |
| Lovex D073.6 | <<locked>> | 80% | 44,657 psi | 81% | 3179 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 45,324 psi | 82% | 3136 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 40,495 psi | 73% | 3071 fps | 98.3% |
| Lovex S065 | <<locked>> | 90% | 45,368 psi | 82% | 3169 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 44,469 psi | 80% | 3153 fps | 99% |
| Norma 202 | <<locked>> | 80% | 44,744 psi | 81% | 3166 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,364 psi | 73% | 3104 fps | 97% |
| Norma URP | <<locked>> | 90% | 41,249 psi | 75% | 3159 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 40,205 psi | 73% | 3114 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 94% | 46,122 psi | 83% | 3268 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,600 psi | 48% | 1975 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,337 psi | 78% | 3238 fps | 97.1% |
| ReloadSwiss RS 60 | 40.9 gr | 80% | 35,172 psi | 64% | 3064 fps | 98.1% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 41,249 psi | 75% | 3179 fps | 95.5% |
| ReloadSwiss RS 70 | 47.8 gr | 92% | 44,164 psi | 80% | 3261 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 42,148 psi | 76% | 3091 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 80% | 35,665 psi | 65% | 2976 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 45,368 psi | 82% | 3169 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,657 psi | 81% | 3179 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 40,495 psi | 73% | 3071 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,695 psi | 66% | 3028 fps | 95.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,963 psi | 83% | 3182 fps | 96.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,903 psi | 79% | 3159 fps | 97.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,600 psi | 83% | 3107 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,985 psi | 69% | 2943 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 45,397 psi | 82% | 3107 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,614 psi | 83% | 3182 fps | 98.2% |
| Somchem S355 | <<locked>> | 80% | 36,535 psi | 66% | 2989 fps | 96.3% |
| Somchem S365 | <<locked>> | 84% | 30,342 psi | 55% | 2897 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 45,919 psi | 83% | 3104 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,669 psi | 75% | 3084 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,351 psi | 77% | 3084 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 34,693 psi | 63% | 2913 fps | 97.2% |
| Vihtavuori N160 | <<locked>> | 88% | 40,335 psi | 73% | 3097 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 41,017 psi | 74% | 3068 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 88% | 39,987 psi | 72% | 3100 fps | 95% |
| Vihtavuori N555 | <<locked>> | 96% | 38,566 psi | 70% | 3133 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 32,996 psi | 60% | 2871 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 98% | 33,910 psi | 61% | 3071 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,381 psi | 79% | 3163 fps | 98.3% |
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 65 powders for .243 Ackley Improved loaded with the .243 | 75gr | Hornady V-MAX. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,419 fps; across all powders the maximum-charge window runs from 2,152 fps to 3,419 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 65 of the 65 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 1:10.5 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 60, Alliant Reloder-17, ReloadSwiss RS 70 rank at the top here: for .243 Ackley Improved with the .243 | 75gr | Hornady V-MAX 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.