Load Specifications
Load data in caliber .22-250 Ackley Improved with .224 | 55gr | Sierra HPBT GameKing bullet and 75 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 ReloadSwiss RS 52.
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% | 49,501 psi | 85% | 3409 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 51,329 psi | 89% | 3474 fps | 99.9% |
| Accurate 2495 | <<locked>> | 90% | 50,981 psi | 88% | 3471 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 49,516 psi | 85% | 3471 fps | 99.6% |
| Accurate 4064 | <<locked>> | 92% | 50,894 psi | 88% | 3510 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,328 psi | 87% | 3547 fps | 96.5% |
| ADI AR 2206H | <<locked>> | 88% | 52,214 psi | 90% | 3547 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 92% | 49,966 psi | 86% | 3468 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 51,097 psi | 88% | 3491 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 86% | 51,068 psi | 88% | 3501 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 52,417 psi | 90% | 3622 fps | 98.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 51,576 psi | 89% | 3645 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 49,458 psi | 85% | 3494 fps | 98.4% |
| Alliant Reloder-15 | <<locked>> | 90% | 50,111 psi | 86% | 3514 fps | 97.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,979 psi | 84% | 3550 fps | 96.4% |
| Alliant Reloder-17 | <<locked>> | 96% | 50,154 psi | 86% | 3606 fps | 98.3% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 51,880 psi | 89% | 3537 fps | 97% |
| Bofors RP3 | <<locked>> | 92% | 49,647 psi | 86% | 3504 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 50,067 psi | 86% | 3428 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 86% | 50,531 psi | 87% | 3517 fps | 99.2% |
| Hodgdon CFE223 | <<locked>> | 84% | 51,561 psi | 89% | 3612 fps | 97.4% |
| Hodgdon H322 | <<locked>> | 82% | 51,285 psi | 88% | 3507 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 50,937 psi | 88% | 3507 fps | 96% |
| Hodgdon H4895 | <<locked>> | 86% | 49,110 psi | 85% | 3488 fps | 98% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,353 psi | 78% | 3412 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 51,416 psi | 89% | 3576 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,534 psi | 60% | 2293 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 50,372 psi | 87% | 3491 fps | 98.1% |
| IMR 3031 | <<locked>> | 88% | 51,590 psi | 89% | 3560 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 49,327 psi | 85% | 3451 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,109 psi | 83% | 3478 fps | 96.1% |
| IMR 4895 | <<locked>> | 90% | 51,372 psi | 89% | 3556 fps | 98% |
| IMR 8208 XBR | <<locked>> | 86% | 51,097 psi | 88% | 3491 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 82% | 51,416 psi | 89% | 3481 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 88% | 51,517 psi | 89% | 3520 fps | 99.8% |
| Lovex S060 | <<locked>> | 88% | 52,170 psi | 90% | 3471 fps | 98.1% |
| Lovex S062 | <<locked>> | 92% | 52,301 psi | 90% | 3520 fps | 99.1% |
| Norma 201 | <<locked>> | 88% | 50,966 psi | 88% | 3488 fps | 98.9% |
| Norma 202 | <<locked>> | 88% | 51,343 psi | 89% | 3501 fps | 99.9% |
| Norma 203B | <<locked>> | 90% | 49,342 psi | 85% | 3501 fps | 97.5% |
| Norma URPᴾ | <<locked>> | 100% | 50,024 psi | 86% | 3543 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 90% | 49,574 psi | 85% | 3514 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 51,213 psi | 88% | 3517 fps | 97.8% |
| Ramshot X-Terminator | <<locked>> | 84% | 52,243 psi | 90% | 3484 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,925 psi | 60% | 2349 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 50,473 psi | 87% | 3478 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 49,458 psi | 85% | 3576 fps | 96.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 49,734 psi | 86% | 3619 fps | 99.8% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,314 psi | 87% | 3566 fps | 96.2% |
| Rottweil R 901 | <<locked>> | 86% | 51,953 psi | 90% | 3491 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 90% | 51,474 psi | 89% | 3484 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 94% | 49,501 psi | 85% | 3488 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 88% | 51,517 psi | 89% | 3520 fps | 99.8% |
| Shooters World Precision | <<locked>> | 92% | 52,301 psi | 90% | 3520 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 51,416 psi | 89% | 3560 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 50,415 psi | 87% | 3491 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 49,385 psi | 85% | 3383 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 49,226 psi | 85% | 3369 fps | 100% |
| Somchem S321 | <<locked>> | 82% | 49,110 psi | 85% | 3465 fps | 98.8% |
| Somchem S335 | <<locked>> | 88% | 52,040 psi | 90% | 3438 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 49,356 psi | 85% | 3448 fps | 97.4% |
| Somchem S355 | <<locked>> | 94% | 50,241 psi | 87% | 3497 fps | 98.1% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,498 psi | 77% | 3468 fps | 98.3% |
| Vihtavuori N130 | <<locked>> | 84% | 52,170 psi | 90% | 3419 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 49,472 psi | 85% | 3379 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 50,560 psi | 87% | 3468 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 51,851 psi | 89% | 3474 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 51,561 psi | 89% | 3481 fps | 99.3% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,460 psi | 90% | 3543 fps | 96.8% |
| Vihtavuori N530 | <<locked>> | 86% | 51,561 psi | 89% | 3494 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 90% | 50,241 psi | 87% | 3458 fps | 99.9% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,692 psi | 89% | 3540 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 50,488 psi | 87% | 3461 fps | 98.5% |
| Winchester 748 | <<locked>> | 86% | 51,169 psi | 88% | 3543 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 88% | 50,169 psi | 87% | 3501 fps | 98.2% |
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 2015 | <<locked>> | 80% | 43,497 psi | 75% | 3291 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,776 psi | 82% | 3402 fps | 99.6% |
| Accurate 2495 | <<locked>> | 80% | 36,085 psi | 62% | 3153 fps | 99.6% |
| Accurate 2520 | <<locked>> | 80% | 43,120 psi | 74% | 3337 fps | 98.7% |
| Accurate 4064 | <<locked>> | 80% | 34,069 psi | 59% | 3117 fps | 97.4% |
| Accurate 4350 | <<locked>> | 98% | 46,949 psi | 81% | 3474 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 82% | 42,931 psi | 74% | 3340 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 88% | 44,063 psi | 76% | 3340 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,308 psi | 73% | 3297 fps | 97% |
| Alliant AR-Comp | <<locked>> | 80% | 41,466 psi | 72% | 3320 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,037 psi | 85% | 3550 fps | 97.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 45,049 psi | 78% | 3491 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 37,956 psi | 65% | 3225 fps | 95.3% |
| Alliant Reloder-15 | <<locked>> | 86% | 43,816 psi | 76% | 3376 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 98% | 45,992 psi | 79% | 3478 fps | 95.4% |
| Alliant Reloder-17 | 39 gr | 90% | 40,741 psi | 70% | 3373 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 45,382 psi | 78% | 3399 fps | 95.3% |
| Bofors RP3 | <<locked>> | 84% | 37,753 psi | 65% | 3225 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,251 psi | 76% | 3304 fps | 98.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,727 psi | 70% | 3301 fps | 97.2% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,570 psi | 77% | 3458 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 80% | 48,022 psi | 83% | 3448 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 47,747 psi | 82% | 3442 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 40,582 psi | 70% | 3287 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 39,798 psi | 69% | 3278 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 39,088 psi | 67% | 3294 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,527 psi | 44% | 2057 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,740 psi | 67% | 3222 fps | 95% |
| IMR 3031 | <<locked>> | 80% | 39,262 psi | 68% | 3301 fps | 99.6% |
| IMR 4064 | <<locked>> | 86% | 43,439 psi | 75% | 3320 fps | 95.5% |
| IMR 4831 | <<locked>> | 98% | 44,599 psi | 77% | 3402 fps | 95% |
| IMR 4895 | <<locked>> | 84% | 42,061 psi | 73% | 3346 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 42,308 psi | 73% | 3297 fps | 97% |
| Lovex D073.5 | <<locked>> | 80% | 47,834 psi | 82% | 3409 fps | 99% |
| Lovex D073.6 | <<locked>> | 80% | 38,957 psi | 67% | 3248 fps | 97.8% |
| Lovex S060 | <<locked>> | 80% | 40,727 psi | 70% | 3212 fps | 95.2% |
| Lovex S062 | <<locked>> | 82% | 38,043 psi | 66% | 3199 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 39,189 psi | 68% | 3215 fps | 96.2% |
| Norma 202 | <<locked>> | 80% | 39,378 psi | 68% | 3241 fps | 98.5% |
| Norma 203B | <<locked>> | 84% | 40,437 psi | 70% | 3291 fps | 95.1% |
| Norma URP | <<locked>> | 98% | 46,775 psi | 81% | 3471 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 86% | 43,308 psi | 75% | 3376 fps | 95.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,452 psi | 71% | 3297 fps | 95.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,919 psi | 79% | 3353 fps | 96.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,976 psi | 45% | 2113 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,355 psi | 82% | 3415 fps | 99.1% |
| ReloadSwiss RS 52 | 35.8 gr | 84% | 42,844 psi | 74% | 3425 fps | 95% |
| ReloadSwiss RS 60 | 36.4 gr | 84% | 35,360 psi | 61% | 3238 fps | 96% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 46,673 psi | 80% | 3488 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 43,018 psi | 74% | 3304 fps | 98.9% |
| Rottweil R 902 | <<locked>> | 80% | 37,449 psi | 65% | 3159 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 88% | 40,538 psi | 70% | 3287 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,957 psi | 67% | 3248 fps | 97.8% |
| Shooters World Precision | <<locked>> | 82% | 38,043 psi | 66% | 3199 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 41,814 psi | 72% | 3346 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 41,524 psi | 72% | 3291 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,915 psi | 71% | 3202 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,721 psi | 58% | 3018 fps | 98% |
| Somchem S321 | <<locked>> | 80% | 45,774 psi | 79% | 3389 fps | 98.2% |
| Somchem S335 | <<locked>> | 80% | 40,335 psi | 70% | 3196 fps | 99.2% |
| Somchem S341 | <<locked>> | 82% | 43,091 psi | 74% | 3310 fps | 95.8% |
| Somchem S355 | <<locked>> | 86% | 38,870 psi | 67% | 3235 fps | 95.1% |
| Somchem S365 | <<locked>> | 94% | 36,318 psi | 63% | 3251 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 46,340 psi | 80% | 3310 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,089 psi | 71% | 3209 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 80% | 36,434 psi | 63% | 3166 fps | 99.6% |
| Vihtavuori N140 | <<locked>> | 80% | 37,289 psi | 64% | 3159 fps | 98.3% |
| Vihtavuori N150 | <<locked>> | 84% | 34,534 psi | 60% | 3087 fps | 95.2% |
| Vihtavuori N160 | <<locked>> | 96% | 45,977 psi | 79% | 3409 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 42,134 psi | 73% | 3287 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 80% | 36,100 psi | 62% | 3136 fps | 97.5% |
| Vihtavuori N550 | <<locked>> | 98% | 48,501 psi | 84% | 3474 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 40,944 psi | 71% | 3248 fps | 96% |
| Winchester 748 | <<locked>> | 80% | 41,394 psi | 71% | 3330 fps | 97.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,203 psi | 66% | 3222 fps | 95% |
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 75 powders for .22-250 Ackley Improved loaded with the .224 | 55gr | Sierra HPBT GameKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,645 fps; across all powders the maximum-charge window runs from 2,293 fps to 3,645 fps. Accurate 4350 gives the best case fill at 100 %, and 75 of the 75 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (400 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 55.0 gr projectile in 0.224" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon Hybrid 100V 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, ReloadSwiss RS 52 rank at the top here: for .22-250 Ackley Improved with the .224 | 55gr | Sierra HPBT GameKing 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.