Load Specifications
Load data in caliber .243 Ackley Improved with .243 | 62gr | Berger M bullet and 61 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 Hodgdon LEVERevolution.
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>> | 84% | 48,936 psi | 89% | 3451 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 46,920 psi | 85% | 3445 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 47,195 psi | 85% | 3482 fps | 99.2% |
| Accurate 4064 | <<locked>> | 90% | 47,181 psi | 85% | 3484 fps | 99.7% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,792 psi | 90% | 3579 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 86% | 48,399 psi | 88% | 3511 fps | 97% |
| ADI AR 2208 | <<locked>> | 92% | 49,530 psi | 90% | 3509 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 84% | 47,529 psi | 86% | 3468 fps | 98% |
| Alliant AR-Comp | <<locked>> | 84% | 47,108 psi | 85% | 3484 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 49,066 psi | 89% | 3534 fps | 98.1% |
| Alliant Reloder-15 | <<locked>> | 90% | 49,443 psi | 89% | 3549 fps | 96.8% |
| Alliant Reloder-17 | <<locked>> | 96% | 49,516 psi | 90% | 3635 fps | 98% |
| Bofors RP3 | <<locked>> | 92% | 49,240 psi | 89% | 3544 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 84% | 49,603 psi | 90% | 3468 fps | 98.9% |
| Hodgdon BL-C2 | <<locked>> | 86% | 49,763 psi | 90% | 3550 fps | 98.9% |
| Hodgdon CFE223 | <<locked>> | 82% | 47,456 psi | 86% | 3573 fps | 96.2% |
| Hodgdon H322 | <<locked>> | 82% | 47,253 psi | 86% | 3480 fps | 99.9% |
| Hodgdon H4895 | <<locked>> | 86% | 48,820 psi | 88% | 3528 fps | 97.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,672 psi | 83% | 3441 fps | 96.7% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 47,718 psi | 86% | 3547 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,360 psi | 64% | 2336 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 49,066 psi | 89% | 3514 fps | 97.7% |
| IMR 3031 | <<locked>> | 90% | 49,690 psi | 90% | 3578 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 48,080 psi | 87% | 3471 fps | 96.5% |
| IMR 4895 | <<locked>> | 88% | 47,703 psi | 86% | 3527 fps | 97% |
| IMR 8208 XBR | <<locked>> | 84% | 47,529 psi | 86% | 3468 fps | 98% |
| Lovex D073.6 | <<locked>> | 86% | 47,543 psi | 86% | 3490 fps | 99.3% |
| Lovex S060 | <<locked>> | 86% | 48,399 psi | 88% | 3441 fps | 97.1% |
| Lovex S062 | <<locked>> | 90% | 48,399 psi | 88% | 3491 fps | 98.3% |
| Norma 201 | <<locked>> | 86% | 47,311 psi | 86% | 3459 fps | 98.1% |
| Norma 202 | <<locked>> | 86% | 47,529 psi | 86% | 3478 fps | 99.6% |
| Norma 203B | <<locked>> | 90% | 48,704 psi | 88% | 3536 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 90% | 49,153 psi | 89% | 3553 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 84% | 47,210 psi | 85% | 3483 fps | 96.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 48,544 psi | 88% | 3456 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,636 psi | 64% | 2387 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 48,892 psi | 88% | 3611 fps | 96.5% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 49,356 psi | 89% | 3656 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 84% | 48,341 psi | 87% | 3470 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 88% | 47,630 psi | 86% | 3454 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 94% | 49,081 psi | 89% | 3530 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 86% | 47,543 psi | 86% | 3490 fps | 99.3% |
| Shooters World Precision | <<locked>> | 90% | 48,399 psi | 88% | 3491 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 47,703 psi | 86% | 3530 fps | 96.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 49,951 psi | 90% | 3532 fps | 97.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 48,878 psi | 88% | 3423 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 49,066 psi | 89% | 3417 fps | 100% |
| Somchem S321 | <<locked>> | 82% | 48,588 psi | 88% | 3501 fps | 98.5% |
| Somchem S335 | <<locked>> | 86% | 48,472 psi | 88% | 3420 fps | 99.9% |
| Somchem S341 | <<locked>> | 86% | 49,081 psi | 89% | 3490 fps | 97.2% |
| Somchem S355 | <<locked>> | 94% | 49,734 psi | 90% | 3533 fps | 97.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,150 psi | 80% | 3501 fps | 98% |
| Vihtavuori N130 | <<locked>> | 82% | 47,630 psi | 86% | 3389 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 48,341 psi | 87% | 3415 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 49,719 psi | 90% | 3504 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 47,253 psi | 86% | 3440 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 98% | 47,674 psi | 86% | 3456 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 82% | 46,818 psi | 85% | 3467 fps | 98% |
| Vihtavuori N540 | <<locked>> | 88% | 47,137 psi | 85% | 3462 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 46,572 psi | 84% | 3423 fps | 97.4% |
| Winchester 748 | <<locked>> | 82% | 47,776 psi | 86% | 3525 fps | 98.8% |
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% | 43,207 psi | 78% | 3333 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,679 psi | 65% | 3189 fps | 99.5% |
| Accurate 2520 | <<locked>> | 80% | 41,060 psi | 74% | 3344 fps | 98.1% |
| Accurate 4064 | <<locked>> | 80% | 33,707 psi | 61% | 3153 fps | 97% |
| Accurate 4350 | <<locked>> | 98% | 46,238 psi | 84% | 3504 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 82% | 42,366 psi | 77% | 3372 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 88% | 43,627 psi | 79% | 3374 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,843 psi | 76% | 3337 fps | 96.7% |
| Alliant AR-Comp | <<locked>> | 80% | 40,915 psi | 74% | 3359 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 40,248 psi | 73% | 3329 fps | 95.8% |
| Alliant Reloder-15 | <<locked>> | 86% | 43,511 psi | 79% | 3412 fps | 95.1% |
| Alliant Reloder-17 | 46 gr | 90% | 40,379 psi | 73% | 3407 fps | 95.1% |
| Bofors RP3 | <<locked>> | 86% | 39,842 psi | 72% | 3325 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,772 psi | 79% | 3342 fps | 97.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,292 psi | 73% | 3337 fps | 96.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,280 psi | 80% | 3497 fps | 95.2% |
| Hodgdon H322 | <<locked>> | 80% | 44,048 psi | 80% | 3411 fps | 99.6% |
| Hodgdon H4895 | <<locked>> | 80% | 40,118 psi | 73% | 3321 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 42,757 psi | 77% | 3378 fps | 95.9% |
| Hodgdon LEVERevolution | 41.8 gr | 84% | 38,827 psi | 70% | 3333 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,512 psi | 46% | 2097 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 40,582 psi | 73% | 3314 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 35,476 psi | 64% | 3248 fps | 98.7% |
| IMR 4064 | <<locked>> | 90% | 45,223 psi | 82% | 3409 fps | 95.8% |
| IMR 4895 | <<locked>> | 84% | 41,626 psi | 75% | 3382 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 41,843 psi | 76% | 3335 fps | 96.7% |
| Lovex D073.6 | <<locked>> | 80% | 38,218 psi | 69% | 3272 fps | 97.3% |
| Lovex S060 | <<locked>> | 82% | 42,685 psi | 77% | 3307 fps | 95.6% |
| Lovex S062 | <<locked>> | 82% | 37,362 psi | 68% | 3224 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 38,899 psi | 70% | 3255 fps | 95.8% |
| Norma 202 | <<locked>> | 80% | 38,943 psi | 70% | 3276 fps | 98.2% |
| Norma 203B | <<locked>> | 86% | 42,801 psi | 77% | 3399 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 86% | 42,641 psi | 77% | 3404 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 44,106 psi | 80% | 3409 fps | 95.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,484 psi | 82% | 3388 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,802 psi | 47% | 2148 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 45,513 psi | 82% | 3537 fps | 95.6% |
| ReloadSwiss RS 60 | 42.9 gr | 84% | 34,998 psi | 63% | 3265 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 42,554 psi | 77% | 3339 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 80% | 37,057 psi | 67% | 3195 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 88% | 39,987 psi | 72% | 3321 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,218 psi | 69% | 3272 fps | 97.3% |
| Shooters World Precision | <<locked>> | 82% | 37,362 psi | 68% | 3224 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 44,556 psi | 81% | 3458 fps | 96% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 43,787 psi | 79% | 3393 fps | 95.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,306 psi | 73% | 3232 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,156 psi | 60% | 3046 fps | 97.6% |
| Somchem S321 | <<locked>> | 80% | 45,165 psi | 82% | 3424 fps | 97.8% |
| Somchem S335 | <<locked>> | 80% | 40,001 psi | 72% | 3234 fps | 99% |
| Somchem S341 | <<locked>> | 82% | 42,641 psi | 77% | 3346 fps | 95.4% |
| Somchem S355 | <<locked>> | 88% | 40,872 psi | 74% | 3332 fps | 95.6% |
| Somchem S365 | <<locked>> | 94% | 35,882 psi | 65% | 3279 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 44,788 psi | 81% | 3334 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,927 psi | 69% | 3186 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 80% | 35,752 psi | 65% | 3196 fps | 99.4% |
| Vihtavuori N140 | <<locked>> | 80% | 36,361 psi | 66% | 3184 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 90% | 36,840 psi | 67% | 3201 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 43,976 psi | 80% | 3403 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 80% | 36,216 psi | 66% | 3198 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 40,567 psi | 73% | 3280 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 44,266 psi | 80% | 3445 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 61 powders for .243 Ackley Improved loaded with the .243 | 62gr | Berger M. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,656 fps; across all powders the maximum-charge window runs from 2,336 fps to 3,656 fps. Accurate 4350 gives the best case fill at 100 %, and 61 of the 61 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 62.0 gr projectile in 0.243" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Hodgdon Hybrid 100V, 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, Hodgdon LEVERevolution rank at the top here: for .243 Ackley Improved with the .243 | 62gr | Berger M 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.