Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 70gr | Sierra Tipped VarmintKing bullet and 68 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 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 2015 | <<locked>> | 82% | 49,966 psi | 90% | 3297 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 48,559 psi | 88% | 3310 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 48,907 psi | 89% | 3356 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 48,312 psi | 87% | 3399 fps | 97.1% |
| ADI AR 2206H | <<locked>> | 84% | 49,226 psi | 89% | 3376 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 88% | 47,326 psi | 86% | 3310 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 48,501 psi | 88% | 3330 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 82% | 48,660 psi | 88% | 3333 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 48,820 psi | 88% | 3481 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 47,166 psi | 85% | 3340 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 86% | 47,558 psi | 86% | 3356 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 98% | 49,937 psi | 90% | 3474 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 92% | 47,442 psi | 86% | 3445 fps | 98.7% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 49,139 psi | 89% | 3376 fps | 97.4% |
| Bofors RP3 | <<locked>> | 88% | 47,485 psi | 86% | 3350 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 82% | 47,601 psi | 86% | 3346 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 88% | 48,312 psi | 87% | 3353 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 84% | 49,661 psi | 90% | 3389 fps | 98.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,647 psi | 90% | 3399 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 49,052 psi | 89% | 3415 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,186 psi | 64% | 2224 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 47,805 psi | 87% | 3333 fps | 98.5% |
| IMR 3031 | <<locked>> | 84% | 49,487 psi | 90% | 3399 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 49,792 psi | 90% | 3356 fps | 98.1% |
| IMR 4831 | <<locked>> | 98% | 49,269 psi | 89% | 3402 fps | 97.4% |
| IMR 4895 | <<locked>> | 86% | 48,733 psi | 88% | 3396 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 82% | 48,501 psi | 88% | 3330 fps | 99.1% |
| Lovex D073.6 | <<locked>> | 84% | 48,733 psi | 88% | 3356 fps | 99.9% |
| Lovex S060 | <<locked>> | 84% | 49,124 psi | 89% | 3304 fps | 98.4% |
| Lovex S062 | <<locked>> | 88% | 49,588 psi | 90% | 3356 fps | 99.3% |
| Lovex S065 | <<locked>> | 94% | 49,139 psi | 89% | 3333 fps | 95.8% |
| Norma 201 | <<locked>> | 84% | 48,066 psi | 87% | 3320 fps | 99.1% |
| Norma 202 | <<locked>> | 84% | 48,704 psi | 88% | 3340 fps | 100% |
| Norma 203B | <<locked>> | 86% | 46,833 psi | 85% | 3340 fps | 97.9% |
| Norma URP | <<locked>> | 96% | 47,834 psi | 87% | 3392 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 86% | 47,166 psi | 85% | 3360 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 82% | 48,109 psi | 87% | 3350 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,520 psi | 64% | 2270 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 47,355 psi | 86% | 3419 fps | 97.4% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 47,268 psi | 86% | 3461 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 47,993 psi | 87% | 3412 fps | 96.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 48,385 psi | 88% | 3438 fps | 96.2% |
| Rottweil R 901 | <<locked>> | 82% | 49,327 psi | 89% | 3327 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 48,718 psi | 88% | 3323 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 90% | 47,369 psi | 86% | 3340 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 94% | 49,139 psi | 89% | 3333 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 84% | 48,733 psi | 88% | 3356 fps | 99.9% |
| Shooters World Precision | <<locked>> | 88% | 49,588 psi | 90% | 3356 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 48,950 psi | 89% | 3402 fps | 98.3% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 47,007 psi | 85% | 3291 fps | 96% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 47,950 psi | 87% | 3337 fps | 98.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 49,647 psi | 90% | 3278 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 47,036 psi | 85% | 3219 fps | 100% |
| Somchem S335 | <<locked>> | 84% | 49,066 psi | 89% | 3268 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 46,543 psi | 84% | 3287 fps | 97.8% |
| Somchem S355 | <<locked>> | 90% | 47,892 psi | 87% | 3343 fps | 98.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,037 psi | 89% | 3461 fps | 99.7% |
| Vihtavuori N133 | <<locked>> | 84% | 49,864 psi | 90% | 3271 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 48,066 psi | 87% | 3304 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 49,269 psi | 89% | 3317 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 49,327 psi | 89% | 3327 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 94% | 46,789 psi | 85% | 3327 fps | 96.5% |
| Vihtavuori N530 | <<locked>> | 82% | 48,660 psi | 88% | 3327 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 86% | 47,514 psi | 86% | 3294 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 96% | 49,356 psi | 89% | 3392 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 47,442 psi | 86% | 3307 fps | 98.8% |
| Winchester 748 | <<locked>> | 82% | 48,254 psi | 87% | 3373 fps | 99.6% |
| Winchester StaBALL Match | <<locked>> | 84% | 47,645 psi | 86% | 3343 fps | 98.6% |
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 2015 | <<locked>> | 80% | 46,978 psi | 85% | 3245 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,595 psi | 72% | 3127 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 37,420 psi | 68% | 3104 fps | 99% |
| Accurate 4350 | <<locked>> | 92% | 41,727 psi | 76% | 3255 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 43,381 psi | 79% | 3248 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 82% | 39,276 psi | 71% | 3120 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,397 psi | 82% | 3264 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 80% | 45,281 psi | 82% | 3274 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 42,366 psi | 77% | 3323 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,172 psi | 65% | 3074 fps | 95.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,088 psi | 71% | 3153 fps | 95.1% |
| Alliant Reloder-16 | 43.8 gr | 92% | 41,408 psi | 75% | 3271 fps | 95.2% |
| Alliant Reloder-17 | 43 gr | 84% | 35,998 psi | 65% | 3146 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,786 psi | 77% | 3238 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 35,955 psi | 65% | 3074 fps | 95.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,208 psi | 80% | 3274 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 86% | 45,165 psi | 82% | 3284 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 43,743 psi | 79% | 3261 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 35,563 psi | 64% | 3071 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,653 psi | 72% | 3205 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,121 psi | 47% | 1995 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,090 psi | 76% | 3202 fps | 97.2% |
| IMR 3031 | <<locked>> | 80% | 43,163 psi | 78% | 3271 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,479 psi | 70% | 3097 fps | 95% |
| IMR 4831 | <<locked>> | 94% | 42,888 psi | 78% | 3261 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 40,045 psi | 72% | 3196 fps | 96.2% |
| IMR 8208 XBR | <<locked>> | 80% | 45,397 psi | 82% | 3264 fps | 98.6% |
| Lovex D073.6 | <<locked>> | 80% | 42,496 psi | 77% | 3225 fps | 99.2% |
| Lovex S060 | <<locked>> | 80% | 43,352 psi | 78% | 3176 fps | 97.1% |
| Lovex S062 | <<locked>> | 80% | 38,435 psi | 70% | 3107 fps | 97.1% |
| Lovex S065 | <<locked>> | 92% | 46,311 psi | 84% | 3274 fps | 95% |
| Norma 201 | <<locked>> | 80% | 42,322 psi | 77% | 3192 fps | 98.1% |
| Norma 202 | <<locked>> | 80% | 42,554 psi | 77% | 3209 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 38,508 psi | 70% | 3143 fps | 95.6% |
| Norma URP | <<locked>> | 92% | 41,916 psi | 76% | 3258 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 38,014 psi | 69% | 3140 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,049 psi | 82% | 3284 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,252 psi | 48% | 2037 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,002 psi | 74% | 3274 fps | 95.7% |
| ReloadSwiss RS 60 | 41 gr | 80% | 33,504 psi | 61% | 3091 fps | 96.6% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 44,701 psi | 81% | 3343 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 44,962 psi | 81% | 3356 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 46,137 psi | 83% | 3261 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 40,408 psi | 73% | 3136 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 82% | 36,085 psi | 65% | 3071 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 46,311 psi | 84% | 3274 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,496 psi | 77% | 3225 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 38,435 psi | 70% | 3107 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 37,362 psi | 68% | 3133 fps | 95% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,656 psi | 79% | 3219 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,032 psi | 76% | 3202 fps | 96.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,874 psi | 79% | 3163 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,405 psi | 66% | 2989 fps | 99.3% |
| Somchem S335 | <<locked>> | 80% | 43,308 psi | 78% | 3156 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 43,540 psi | 79% | 3222 fps | 97.1% |
| Somchem S355 | <<locked>> | 82% | 37,028 psi | 67% | 3084 fps | 95.7% |
| Somchem S365 | <<locked>> | 88% | 32,793 psi | 59% | 3054 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 44,121 psi | 80% | 3163 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,697 psi | 72% | 3133 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,524 psi | 73% | 3133 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 33,054 psi | 60% | 2949 fps | 95.8% |
| Vihtavuori N160 | <<locked>> | 92% | 43,656 psi | 79% | 3258 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 45,455 psi | 82% | 3258 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 80% | 38,928 psi | 70% | 3107 fps | 99% |
| Vihtavuori N550 | <<locked>> | 92% | 43,134 psi | 78% | 3258 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 36,085 psi | 65% | 3035 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 45,063 psi | 82% | 3307 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,394 psi | 75% | 3202 fps | 97.2% |
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 68 powders for .243 Ackley Improved loaded with the .243 | 70gr | Sierra Tipped VarmintKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,481 fps; across all powders the maximum-charge window runs from 2,224 fps to 3,481 fps. Hodgdon Hybrid 100V gives the best case fill at 100 %, and 68 of the 68 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 70.0 gr projectile in 0.243" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Hodgdon Hybrid 100V, 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, Alliant Reloder-17 rank at the top here: for .243 Ackley Improved with the .243 | 70gr | Sierra Tipped VarmintKing 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.