Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 73gr | SUS-TAC HPPT 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-17 and Alliant Reloder-16.
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.
A valid access license is required to use the Personalized Load Calculator.
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% | 49,472 psi | 90% | 3264 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 49,487 psi | 90% | 3307 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 49,197 psi | 89% | 3363 fps | 97.6% |
| ADI AR 2206H | <<locked>> | 84% | 49,980 psi | 90% | 3330 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 88% | 48,095 psi | 87% | 3268 fps | 97.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 48,907 psi | 89% | 3281 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 82% | 49,066 psi | 89% | 3278 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 49,153 psi | 89% | 3432 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 47,718 psi | 86% | 3291 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 86% | 48,399 psi | 88% | 3314 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 96% | 47,718 psi | 86% | 3369 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 92% | 48,240 psi | 87% | 3406 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,551 psi | 70% | 3156 fps | 96.5% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 49,763 psi | 90% | 3330 fps | 97.8% |
| Bofors RP3 | <<locked>> | 88% | 48,124 psi | 87% | 3304 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 82% | 48,138 psi | 87% | 3301 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 88% | 48,921 psi | 89% | 3307 fps | 97% |
| Hodgdon H4895 | <<locked>> | 82% | 47,166 psi | 85% | 3278 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 47,050 psi | 85% | 3291 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 49,705 psi | 90% | 3373 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,172 psi | 64% | 2172 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 48,559 psi | 88% | 3291 fps | 98.8% |
| IMR 3031 | <<locked>> | 84% | 49,922 psi | 90% | 3343 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 47,239 psi | 85% | 3245 fps | 97.9% |
| IMR 4831 | <<locked>> | 98% | 49,806 psi | 90% | 3353 fps | 97.8% |
| IMR 4895 | <<locked>> | 86% | 49,603 psi | 90% | 3353 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 82% | 48,907 psi | 89% | 3281 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 84% | 49,356 psi | 89% | 3307 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 49,748 psi | 90% | 3258 fps | 98.7% |
| Lovex S062 | <<locked>> | 86% | 47,166 psi | 85% | 3251 fps | 99.2% |
| Lovex S065 | <<locked>> | 94% | 49,806 psi | 90% | 3291 fps | 96.3% |
| Norma 201 | <<locked>> | 84% | 48,820 psi | 88% | 3274 fps | 99.3% |
| Norma 202 | <<locked>> | 84% | 49,124 psi | 89% | 3284 fps | 100% |
| Norma 203B | <<locked>> | 86% | 47,674 psi | 86% | 3297 fps | 98.3% |
| Norma URP | <<locked>> | 96% | 48,588 psi | 88% | 3353 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 86% | 47,558 psi | 86% | 3310 fps | 98.2% |
| Ramshot TAC | <<locked>> | 82% | 49,226 psi | 89% | 3278 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 82% | 48,617 psi | 88% | 3301 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,549 psi | 64% | 2221 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 47,979 psi | 87% | 3373 fps | 97.8% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 47,993 psi | 87% | 3419 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 48,994 psi | 89% | 3376 fps | 97.3% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 48,950 psi | 89% | 3399 fps | 96.7% |
| Rottweil R 901 | <<locked>> | 82% | 49,937 psi | 90% | 3278 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 49,443 psi | 89% | 3278 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 90% | 47,979 psi | 87% | 3294 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 94% | 49,806 psi | 90% | 3291 fps | 96.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 49,356 psi | 89% | 3307 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 47,166 psi | 85% | 3251 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 49,705 psi | 90% | 3360 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 47,514 psi | 86% | 3248 fps | 96.5% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 48,443 psi | 88% | 3287 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 47,210 psi | 85% | 3169 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 47,427 psi | 86% | 3169 fps | 100% |
| Somchem S335 | <<locked>> | 84% | 49,719 psi | 90% | 3222 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 47,123 psi | 85% | 3241 fps | 98.2% |
| Somchem S355 | <<locked>> | 90% | 48,428 psi | 88% | 3297 fps | 98.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,690 psi | 90% | 3419 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 82% | 47,485 psi | 86% | 3166 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 48,791 psi | 88% | 3255 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 49,748 psi | 90% | 3261 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 49,951 psi | 90% | 3281 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 94% | 47,543 psi | 86% | 3287 fps | 97% |
| Vihtavuori N530 | <<locked>> | 82% | 49,400 psi | 89% | 3281 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 86% | 48,385 psi | 88% | 3251 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 46,934 psi | 85% | 3287 fps | 96.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,989 psi | 76% | 3248 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 47,935 psi | 87% | 3261 fps | 99.1% |
| Winchester 748 | <<locked>> | 82% | 49,095 psi | 89% | 3330 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 48,225 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% | 40,234 psi | 73% | 3084 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 37,971 psi | 69% | 3061 fps | 99.3% |
| Accurate 4350 | <<locked>> | 92% | 42,395 psi | 77% | 3215 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 43,961 psi | 80% | 3202 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 39,784 psi | 72% | 3077 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,050 psi | 83% | 3219 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 80% | 45,963 psi | 83% | 3222 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,016 psi | 72% | 3209 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,738 psi | 66% | 3035 fps | 96.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,711 psi | 72% | 3114 fps | 95.7% |
| Alliant Reloder-16 | 43.1 gr | 92% | 41,959 psi | 76% | 3228 fps | 95.8% |
| Alliant Reloder-17 | 42.4 gr | 84% | 36,680 psi | 66% | 3117 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 98% | 36,274 psi | 66% | 3091 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,236 psi | 78% | 3192 fps | 96.2% |
| Bofors RP3 | <<locked>> | 80% | 36,535 psi | 66% | 3038 fps | 96.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,991 psi | 81% | 3235 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 84% | 42,946 psi | 78% | 3176 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 44,396 psi | 80% | 3215 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 36,245 psi | 66% | 3038 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,350 psi | 73% | 3169 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,223 psi | 47% | 1949 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,380 psi | 77% | 3153 fps | 97.6% |
| IMR 3031 | <<locked>> | 80% | 43,801 psi | 79% | 3225 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,986 psi | 71% | 3054 fps | 95.6% |
| IMR 4831 | <<locked>> | 92% | 40,654 psi | 74% | 3153 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 40,698 psi | 74% | 3153 fps | 96.7% |
| IMR 8208 XBR | <<locked>> | 80% | 46,050 psi | 83% | 3219 fps | 98.9% |
| Lovex D073.6 | <<locked>> | 80% | 42,902 psi | 78% | 3176 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 43,845 psi | 79% | 3133 fps | 97.6% |
| Lovex S062 | <<locked>> | 80% | 38,972 psi | 71% | 3064 fps | 97.5% |
| Lovex S065 | <<locked>> | 92% | 46,876 psi | 85% | 3232 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 42,873 psi | 78% | 3150 fps | 98.4% |
| Norma 202 | <<locked>> | 80% | 43,105 psi | 78% | 3163 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 39,102 psi | 71% | 3100 fps | 96.2% |
| Norma URP | <<locked>> | 92% | 42,554 psi | 77% | 3219 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 38,711 psi | 70% | 3107 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 46,108 psi | 83% | 3212 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,484 psi | 82% | 3235 fps | 97.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,382 psi | 48% | 1991 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,466 psi | 75% | 3228 fps | 96.2% |
| ReloadSwiss RS 60 | 40.3 gr | 80% | 33,852 psi | 61% | 3051 fps | 97.2% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 42,511 psi | 77% | 3238 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 45,440 psi | 82% | 3317 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 46,702 psi | 85% | 3215 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 40,915 psi | 74% | 3094 fps | 98% |
| Rottweil R 903 | <<locked>> | 80% | 34,156 psi | 62% | 2966 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 46,876 psi | 85% | 3232 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,902 psi | 78% | 3176 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 38,972 psi | 71% | 3064 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 37,768 psi | 68% | 3091 fps | 95.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,425 psi | 80% | 3179 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,395 psi | 77% | 3156 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,324 psi | 80% | 3114 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,840 psi | 67% | 2946 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 43,859 psi | 79% | 3107 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,034 psi | 80% | 3179 fps | 97.5% |
| Somchem S355 | <<locked>> | 80% | 35,070 psi | 63% | 2979 fps | 95.3% |
| Somchem S365 | <<locked>> | 88% | 33,214 psi | 60% | 3018 fps | 96.1% |
| Vihtavuori N133 | <<locked>> | 80% | 44,614 psi | 81% | 3110 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,263 psi | 73% | 3087 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,799 psi | 74% | 3084 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 33,301 psi | 60% | 2904 fps | 96.3% |
| Vihtavuori N160 | <<locked>> | 90% | 41,611 psi | 75% | 3156 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 46,079 psi | 83% | 3215 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 39,552 psi | 72% | 3064 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 92% | 43,830 psi | 79% | 3222 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 98% | 39,349 psi | 71% | 3186 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 34,258 psi | 62% | 2933 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 45,818 psi | 83% | 3264 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,105 psi | 76% | 3163 fps | 97.7% |
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 70 powders for .243 Ackley Improved loaded with the .243 | 73gr | SUS-TAC HPPT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,432 fps; across all powders the maximum-charge window runs from 2,172 fps to 3,432 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-17, Alliant Reloder-16 rank at the top here: for .243 Ackley Improved with the .243 | 73gr | SUS-TAC HPPT 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.