Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 73gr | SUS-TAC HPT bullet and 70 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-16 and Norma URP.
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>> | 86% | 49,385 psi | 89% | 3264 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 49,385 psi | 89% | 3307 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 49,037 psi | 89% | 3360 fps | 97.5% |
| ADI AR 2206H | <<locked>> | 84% | 49,879 psi | 90% | 3330 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 88% | 47,993 psi | 87% | 3268 fps | 97.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 49,124 psi | 89% | 3284 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 82% | 49,356 psi | 89% | 3281 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 49,385 psi | 89% | 3435 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 47,935 psi | 87% | 3297 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 86% | 48,254 psi | 87% | 3310 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 96% | 47,601 psi | 86% | 3366 fps | 97.5% |
| Alliant Reloder-17 | <<locked>> | 92% | 48,472 psi | 88% | 3409 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,711 psi | 70% | 3159 fps | 96.5% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 49,661 psi | 90% | 3330 fps | 97.8% |
| Bofors RP3 | <<locked>> | 88% | 47,993 psi | 87% | 3304 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 82% | 48,399 psi | 88% | 3307 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 88% | 49,168 psi | 89% | 3310 fps | 97% |
| Hodgdon H4895 | <<locked>> | 82% | 47,369 psi | 86% | 3281 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 46,934 psi | 85% | 3291 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 49,922 psi | 90% | 3376 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,099 psi | 64% | 2172 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 48,428 psi | 88% | 3287 fps | 98.8% |
| IMR 3031 | <<locked>> | 82% | 47,036 psi | 85% | 3291 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 47,485 psi | 86% | 3251 fps | 97.9% |
| IMR 4831 | <<locked>> | 98% | 50,009 psi | 90% | 3356 fps | 97.8% |
| IMR 4895 | <<locked>> | 86% | 49,487 psi | 90% | 3350 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 82% | 49,124 psi | 89% | 3284 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 84% | 49,559 psi | 90% | 3310 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 49,632 psi | 90% | 3255 fps | 98.7% |
| Lovex S062 | <<locked>> | 86% | 47,369 psi | 86% | 3255 fps | 99.2% |
| Lovex S065 | <<locked>> | 94% | 49,980 psi | 90% | 3297 fps | 96.4% |
| Norma 201 | <<locked>> | 84% | 49,023 psi | 89% | 3278 fps | 99.4% |
| Norma 202 | <<locked>> | 84% | 49,327 psi | 89% | 3287 fps | 100% |
| Norma 203B | <<locked>> | 86% | 47,558 psi | 86% | 3297 fps | 98.3% |
| Norma URP | <<locked>> | 96% | 48,472 psi | 88% | 3350 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 86% | 47,761 psi | 86% | 3314 fps | 98.2% |
| Ramshot TAC | <<locked>> | 82% | 49,414 psi | 89% | 3281 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 82% | 48,849 psi | 88% | 3304 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,491 psi | 64% | 2221 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 48,211 psi | 87% | 3379 fps | 97.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 48,225 psi | 87% | 3422 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 48,849 psi | 88% | 3376 fps | 97.3% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 48,805 psi | 88% | 3396 fps | 96.7% |
| Rottweil R 901 | <<locked>> | 82% | 49,821 psi | 90% | 3274 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 49,327 psi | 89% | 3274 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 90% | 48,211 psi | 87% | 3301 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 94% | 49,980 psi | 90% | 3297 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 49,559 psi | 90% | 3310 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 47,369 psi | 86% | 3255 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 49,588 psi | 90% | 3360 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 47,761 psi | 86% | 3251 fps | 96.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 48,689 psi | 88% | 3294 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 47,094 psi | 85% | 3169 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 47,616 psi | 86% | 3173 fps | 100% |
| Somchem S335 | <<locked>> | 84% | 49,980 psi | 90% | 3225 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 47,297 psi | 86% | 3248 fps | 98.2% |
| Somchem S355 | <<locked>> | 90% | 48,646 psi | 88% | 3301 fps | 98.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,893 psi | 90% | 3422 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 82% | 47,384 psi | 86% | 3166 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 49,037 psi | 89% | 3258 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 49,980 psi | 90% | 3268 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 49,835 psi | 90% | 3281 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 94% | 47,747 psi | 86% | 3291 fps | 97.1% |
| Vihtavuori N530 | <<locked>> | 82% | 49,269 psi | 89% | 3281 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 86% | 48,269 psi | 87% | 3248 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 46,804 psi | 85% | 3287 fps | 96.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,192 psi | 76% | 3255 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 48,095 psi | 87% | 3264 fps | 99.1% |
| Winchester 748 | <<locked>> | 82% | 48,994 psi | 89% | 3330 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 48,124 psi | 87% | 3294 fps | 98.9% |
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% | 40,451 psi | 73% | 3087 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 38,189 psi | 69% | 3068 fps | 99.4% |
| Accurate 4350 | <<locked>> | 92% | 42,612 psi | 77% | 3222 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 43,874 psi | 79% | 3199 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 39,697 psi | 72% | 3077 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,919 psi | 83% | 3219 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 80% | 46,195 psi | 84% | 3225 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,929 psi | 72% | 3205 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,912 psi | 67% | 3041 fps | 96.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,624 psi | 72% | 3114 fps | 95.7% |
| Alliant Reloder-16 | 43.1 gr | 92% | 41,829 psi | 76% | 3228 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 84% | 36,593 psi | 66% | 3114 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 98% | 36,405 psi | 66% | 3097 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,149 psi | 78% | 3192 fps | 96.2% |
| Bofors RP3 | <<locked>> | 80% | 36,463 psi | 66% | 3035 fps | 96.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,889 psi | 81% | 3232 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 84% | 42,844 psi | 78% | 3173 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 44,295 psi | 80% | 3215 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 36,143 psi | 65% | 3035 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,263 psi | 73% | 3166 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,179 psi | 47% | 1949 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,554 psi | 77% | 3159 fps | 97.7% |
| IMR 3031 | <<locked>> | 80% | 43,714 psi | 79% | 3222 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,175 psi | 71% | 3058 fps | 95.7% |
| IMR 4831 | <<locked>> | 92% | 40,814 psi | 74% | 3159 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 40,611 psi | 73% | 3153 fps | 96.7% |
| IMR 8208 XBR | <<locked>> | 80% | 45,919 psi | 83% | 3219 fps | 98.9% |
| Lovex D073.6 | <<locked>> | 80% | 43,105 psi | 78% | 3179 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 44,092 psi | 80% | 3136 fps | 97.6% |
| Lovex S062 | <<locked>> | 80% | 39,131 psi | 71% | 3068 fps | 97.6% |
| Lovex S065 | <<locked>> | 92% | 46,760 psi | 85% | 3228 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 43,076 psi | 78% | 3153 fps | 98.5% |
| Norma 202 | <<locked>> | 80% | 43,308 psi | 78% | 3169 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 39,015 psi | 71% | 3100 fps | 96.2% |
| Norma URP | 43.8 gr | 92% | 42,438 psi | 77% | 3219 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 38,638 psi | 70% | 3107 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 46,021 psi | 83% | 3209 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,716 psi | 83% | 3241 fps | 97.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,353 psi | 48% | 1991 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,669 psi | 75% | 3232 fps | 96.2% |
| ReloadSwiss RS 60 | 40.4 gr | 80% | 33,997 psi | 62% | 3054 fps | 97.3% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 42,395 psi | 77% | 3238 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 45,585 psi | 82% | 3320 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 46,949 psi | 85% | 3215 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 40,828 psi | 74% | 3091 fps | 98% |
| Rottweil R 903 | <<locked>> | 80% | 34,330 psi | 62% | 2969 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 46,760 psi | 85% | 3228 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,105 psi | 78% | 3179 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 39,131 psi | 71% | 3068 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 37,956 psi | 69% | 3094 fps | 95.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,324 psi | 80% | 3176 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,598 psi | 77% | 3163 fps | 97.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,237 psi | 80% | 3114 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,753 psi | 67% | 2943 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 44,048 psi | 80% | 3114 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,932 psi | 80% | 3176 fps | 97.5% |
| Somchem S355 | <<locked>> | 80% | 35,259 psi | 64% | 2982 fps | 95.4% |
| Somchem S365 | <<locked>> | 86% | 31,140 psi | 56% | 2949 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 44,527 psi | 81% | 3110 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,190 psi | 73% | 3087 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,988 psi | 74% | 3087 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 33,460 psi | 61% | 2910 fps | 96.4% |
| Vihtavuori N160 | <<locked>> | 90% | 41,495 psi | 75% | 3153 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 45,992 psi | 83% | 3215 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 39,726 psi | 72% | 3071 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 90% | 41,147 psi | 74% | 3156 fps | 95% |
| Vihtavuori N555 | <<locked>> | 98% | 39,508 psi | 71% | 3192 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 34,171 psi | 62% | 2930 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 45,730 psi | 83% | 3264 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,018 psi | 76% | 3159 fps | 97.6% |
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 70 powders for .243 Ackley Improved loaded with the .243 | 73gr | SUS-TAC HPT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,435 fps; across all powders the maximum-charge window runs from 2,172 fps to 3,435 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 70 of the 70 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 73.0 gr projectile in 0.243" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Hodgdon TrailBoss, ReloadSwiss RS 14 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-16, Norma URP rank at the top here: for .243 Ackley Improved with the .243 | 73gr | SUS-TAC HPT 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.