Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 75gr | Remington HP 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 Alliant Reloder-16, 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% | 47,442 psi | 86% | 3192 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 47,819 psi | 87% | 3238 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 47,413 psi | 86% | 3294 fps | 97.5% |
| ADI AR 2206H | <<locked>> | 82% | 48,182 psi | 87% | 3261 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 88% | 49,226 psi | 89% | 3261 fps | 98.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 47,384 psi | 86% | 3363 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 49,284 psi | 89% | 3287 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 86% | 49,588 psi | 90% | 3307 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 96% | 48,863 psi | 88% | 3363 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 92% | 49,835 psi | 90% | 3406 fps | 99.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,827 psi | 72% | 3163 fps | 97.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,976 psi | 81% | 3343 fps | 96.6% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 47,703 psi | 86% | 3258 fps | 97.7% |
| Bofors RP3 | <<locked>> | 88% | 49,414 psi | 89% | 3297 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 82% | 49,748 psi | 90% | 3297 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 86% | 47,166 psi | 85% | 3238 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 82% | 48,675 psi | 88% | 3274 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 48,631 psi | 88% | 3291 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 47,993 psi | 87% | 3304 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,201 psi | 64% | 2149 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 49,705 psi | 90% | 3278 fps | 99.2% |
| IMR 3031 | <<locked>> | 82% | 48,138 psi | 87% | 3271 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 48,762 psi | 88% | 3245 fps | 98.4% |
| IMR 4831 | <<locked>> | 96% | 48,399 psi | 88% | 3294 fps | 97.8% |
| IMR 4895 | <<locked>> | 84% | 47,572 psi | 86% | 3278 fps | 98.6% |
| Lovex D073.6 | <<locked>> | 82% | 47,630 psi | 86% | 3235 fps | 99.9% |
| Lovex S060 | <<locked>> | 82% | 47,950 psi | 87% | 3186 fps | 98.6% |
| Lovex S062 | <<locked>> | 86% | 48,675 psi | 88% | 3248 fps | 99.5% |
| Lovex S065 | <<locked>> | 92% | 48,037 psi | 87% | 3225 fps | 96.2% |
| Norma 201 | <<locked>> | 84% | 49,966 psi | 90% | 3264 fps | 99.6% |
| Norma 202 | <<locked>> | 82% | 47,413 psi | 86% | 3219 fps | 100% |
| Norma 203B | <<locked>> | 86% | 48,892 psi | 88% | 3291 fps | 98.8% |
| Norma URP | <<locked>> | 96% | 49,937 psi | 90% | 3346 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 86% | 49,110 psi | 89% | 3307 fps | 98.7% |
| Ramshot Hunter | <<locked>> | 96% | 49,226 psi | 89% | 3333 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,911 psi | 65% | 2201 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 49,719 psi | 90% | 3373 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 49,588 psi | 90% | 3415 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 47,282 psi | 86% | 3310 fps | 97.2% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 47,152 psi | 85% | 3330 fps | 96.6% |
| Rottweil R 902 | <<locked>> | 84% | 47,732 psi | 86% | 3209 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 90% | 49,617 psi | 90% | 3291 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 48,037 psi | 87% | 3225 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 82% | 47,630 psi | 86% | 3235 fps | 99.9% |
| Shooters World Precision | <<locked>> | 86% | 48,675 psi | 88% | 3248 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 47,979 psi | 87% | 3291 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 49,037 psi | 89% | 3245 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 49,966 psi | 90% | 3284 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 48,312 psi | 87% | 3159 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 48,892 psi | 88% | 3159 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 47,993 psi | 87% | 3156 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 48,602 psi | 88% | 3238 fps | 98.7% |
| Somchem S355 | <<locked>> | 90% | 49,980 psi | 90% | 3294 fps | 99.3% |
| Somchem S365 | <<locked>> | 98% | 48,254 psi | 87% | 3356 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 82% | 48,631 psi | 88% | 3150 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 47,079 psi | 85% | 3186 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 47,964 psi | 87% | 3196 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 48,124 psi | 87% | 3212 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 94% | 49,168 psi | 89% | 3287 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 86% | 49,530 psi | 90% | 3238 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 48,457 psi | 88% | 3287 fps | 97.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,671 psi | 79% | 3255 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 49,647 psi | 90% | 3264 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,955 psi | 65% | 3140 fps | 96.7% |
| Winchester StaBALL Match | <<locked>> | 84% | 49,429 psi | 89% | 3284 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% | 41,771 psi | 76% | 3081 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 39,450 psi | 71% | 3061 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 40,959 psi | 74% | 3150 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 45,092 psi | 82% | 3196 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 80% | 38,392 psi | 69% | 3012 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,089 psi | 74% | 3209 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,072 psi | 69% | 3038 fps | 97.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,814 psi | 74% | 3110 fps | 96.4% |
| Alliant Reloder-16 | 42.5 gr | 90% | 40,480 psi | 73% | 3163 fps | 95.7% |
| Alliant Reloder-17 | 41.7 gr | 82% | 35,201 psi | 64% | 3045 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 96% | 35,070 psi | 63% | 3028 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 98% | 41,901 psi | 76% | 3268 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,353 psi | 80% | 3186 fps | 96.9% |
| Bofors RP3 | <<locked>> | 80% | 37,666 psi | 68% | 3035 fps | 97.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,195 psi | 84% | 3225 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 82% | 41,176 psi | 75% | 3100 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 45,513 psi | 82% | 3209 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 35,027 psi | 63% | 2976 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,539 psi | 75% | 3163 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,339 psi | 48% | 1929 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,729 psi | 79% | 3153 fps | 98.2% |
| IMR 3031 | <<locked>> | 80% | 45,150 psi | 82% | 3215 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,306 psi | 73% | 3058 fps | 96.4% |
| IMR 4831 | <<locked>> | 90% | 39,566 psi | 72% | 3097 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 41,800 psi | 76% | 3150 fps | 97.4% |
| Lovex D073.6 | <<locked>> | 80% | 44,469 psi | 80% | 3176 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 44,875 psi | 81% | 3123 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 40,001 psi | 72% | 3058 fps | 98.1% |
| Lovex S065 | <<locked>> | 90% | 45,281 psi | 82% | 3166 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 44,266 psi | 80% | 3146 fps | 98.9% |
| Norma 202 | <<locked>> | 80% | 44,556 psi | 81% | 3159 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 40,176 psi | 73% | 3097 fps | 96.9% |
| Norma URP | <<locked>> | 90% | 41,089 psi | 74% | 3153 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 39,769 psi | 72% | 3104 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 94% | 46,006 psi | 83% | 3264 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,513 psi | 48% | 1972 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,120 psi | 78% | 3232 fps | 97% |
| ReloadSwiss RS 60 | 40.7 gr | 80% | 35,027 psi | 63% | 3058 fps | 98% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 40,799 psi | 74% | 3166 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 43,758 psi | 79% | 3248 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 41,959 psi | 76% | 3084 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 80% | 35,505 psi | 64% | 2969 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 45,281 psi | 82% | 3166 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,469 psi | 80% | 3176 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 40,001 psi | 72% | 3058 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,506 psi | 66% | 3022 fps | 95.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,556 psi | 82% | 3173 fps | 96.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,758 psi | 79% | 3156 fps | 97.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,440 psi | 82% | 3104 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,826 psi | 68% | 2936 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 45,223 psi | 82% | 3104 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,165 psi | 82% | 3169 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 36,347 psi | 66% | 2982 fps | 96.2% |
| Somchem S365 | <<locked>> | 86% | 32,169 psi | 58% | 2956 fps | 96% |
| Vihtavuori N133 | <<locked>> | 80% | 45,730 psi | 83% | 3097 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,452 psi | 75% | 3074 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,177 psi | 76% | 3081 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 34,534 psi | 62% | 2907 fps | 97.1% |
| Vihtavuori N160 | <<locked>> | 88% | 40,176 psi | 73% | 3091 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 40,553 psi | 73% | 3058 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 42,351 psi | 77% | 3156 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 96% | 38,130 psi | 69% | 3123 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 35,085 psi | 63% | 2930 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 33,634 psi | 61% | 3058 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,192 psi | 78% | 3156 fps | 98.2% |
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 65 powders for .243 Ackley Improved loaded with the .243 | 75gr | Remington HP V-Max. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,415 fps; across all powders the maximum-charge window runs from 2,149 fps to 3,415 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 1:9.5 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. Alliant Reloder-16, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .243 Ackley Improved with the .243 | 75gr | Remington HP 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.