Load Specifications
Load data in caliber .22 Creedmoor with .224 | 64gr | Sierra Tipped GameKing bullet and 94 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 70 and Hodgdon H414.
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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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 2015 | <<locked>> | 84% | 58,131 psi | 89% | 3360 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 57,551 psi | 89% | 3383 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,071 psi | 85% | 3389 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,188 psi | 86% | 3363 fps | 96.2% |
| Accurate 4064 | <<locked>> | 90% | 57,363 psi | 88% | 3428 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 58,291 psi | 90% | 3524 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 57,145 psi | 88% | 3461 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 58,552 psi | 90% | 3461 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 56,260 psi | 87% | 3412 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 57,450 psi | 88% | 3392 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 57,537 psi | 89% | 3599 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 58,813 psi | 90% | 3488 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,666 psi | 86% | 3451 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 58,726 psi | 90% | 3583 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 94% | 56,985 psi | 88% | 3566 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,438 psi | 65% | 3258 fps | 98.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,544 psi | 75% | 3458 fps | 98.1% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 57,551 psi | 89% | 3474 fps | 99.4% |
| Bofors RP3 | <<locked>> | 90% | 56,043 psi | 86% | 3445 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,028 psi | 86% | 3406 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 57,580 psi | 89% | 3392 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,173 psi | 86% | 3438 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 57,957 psi | 89% | 3553 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 90% | 57,130 psi | 88% | 3461 fps | 99% |
| Hodgdon H414 | <<locked>> | 96% | 56,985 psi | 88% | 3507 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 94% | 57,246 psi | 88% | 3468 fps | 96% |
| Hodgdon H4895 | <<locked>> | 86% | 57,798 psi | 89% | 3478 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 55,463 psi | 85% | 3438 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 57,856 psi | 89% | 3510 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 58,160 psi | 89% | 3553 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,592 psi | 55% | 2192 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,506 psi | 85% | 3419 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 58,233 psi | 90% | 3468 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 57,769 psi | 89% | 3442 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 57,769 psi | 89% | 3419 fps | 97.4% |
| IMR 4350 | <<locked>> | 98% | 56,695 psi | 87% | 3432 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 94% | 57,972 psi | 89% | 3445 fps | 97.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 58,624 psi | 90% | 3507 fps | 99.5% |
| IMR 4895 | <<locked>> | 88% | 57,043 psi | 88% | 3488 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 84% | 56,260 psi | 87% | 3412 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 57,609 psi | 89% | 3438 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,405 psi | 87% | 3383 fps | 99.8% |
| Lovex S062 | <<locked>> | 90% | 57,798 psi | 89% | 3442 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 57,363 psi | 88% | 3435 fps | 98.5% |
| Lovex S070 | <<locked>> | 98% | 58,537 psi | 90% | 3471 fps | 97.7% |
| Norma 201 | <<locked>> | 86% | 55,912 psi | 86% | 3402 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,478 psi | 87% | 3406 fps | 100% |
| Norma 203B | <<locked>> | 90% | 58,595 psi | 90% | 3501 fps | 99.9% |
| Norma URP | <<locked>> | 98% | 56,739 psi | 87% | 3501 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 88% | 55,666 psi | 86% | 3458 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 98% | 55,869 psi | 86% | 3491 fps | 98% |
| Ramshot TAC | <<locked>> | 84% | 56,855 psi | 87% | 3425 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 84% | 56,434 psi | 87% | 3445 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 56,985 psi | 88% | 3406 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,129 psi | 56% | 2241 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 57,188 psi | 88% | 3435 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 56,492 psi | 87% | 3530 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 56,637 psi | 87% | 3570 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 58,421 psi | 90% | 3543 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 57,421 psi | 88% | 3573 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 84% | 56,623 psi | 87% | 3389 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 56,391 psi | 87% | 3399 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,854 psi | 86% | 3435 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 94% | 56,028 psi | 86% | 3406 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 96% | 57,363 psi | 88% | 3435 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 57,609 psi | 89% | 3438 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 57,798 psi | 89% | 3442 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 58,537 psi | 90% | 3471 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 57,986 psi | 89% | 3504 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,419 psi | 85% | 3399 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,999 psi | 86% | 3428 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 57,217 psi | 88% | 3340 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 57,957 psi | 89% | 3333 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 57,754 psi | 89% | 3379 fps | 97.4% |
| Somchem S321 | <<locked>> | 82% | 57,595 psi | 89% | 3442 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 56,666 psi | 87% | 3330 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 58,653 psi | 90% | 3448 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 56,144 psi | 86% | 3432 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 55,521 psi | 85% | 3510 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 56,536 psi | 87% | 3297 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 57,508 psi | 88% | 3320 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 56,304 psi | 87% | 3366 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 57,261 psi | 88% | 3379 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 57,754 psi | 89% | 3409 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,521 psi | 85% | 3435 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 84% | 56,826 psi | 87% | 3412 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,767 psi | 86% | 3373 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 58,450 psi | 90% | 3501 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,065 psi | 72% | 3350 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,985 psi | 86% | 3409 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 57,116 psi | 88% | 3465 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 57,406 psi | 88% | 3514 fps | 97.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,290 psi | 59% | 3255 fps | 98.4% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,999 psi | 86% | 3435 fps | 99.9% |
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 2015 | <<locked>> | 80% | 51,169 psi | 79% | 3248 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,888 psi | 68% | 3146 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,474 psi | 79% | 3327 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 52,634 psi | 81% | 3297 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 41,481 psi | 64% | 3133 fps | 99.9% |
| Accurate 4350 | <<locked>> | 86% | 37,956 psi | 58% | 3100 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 47,253 psi | 73% | 3274 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 40,190 psi | 62% | 3091 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,327 psi | 76% | 3284 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 50,227 psi | 77% | 3281 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,424 psi | 67% | 3301 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,900 psi | 61% | 3114 fps | 98% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,917 psi | 66% | 3192 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 86% | 37,724 psi | 58% | 3120 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,693 psi | 53% | 3058 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 35,201 psi | 54% | 3064 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 96% | 41,814 psi | 64% | 3297 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,934 psi | 72% | 3271 fps | 97.9% |
| Bofors RP3 | <<locked>> | 80% | 39,958 psi | 61% | 3120 fps | 98.1% |
| Bofors RP7 | <<locked>> | 92% | 52,417 psi | 81% | 3337 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,995 psi | 78% | 3278 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,776 psi | 75% | 3307 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 54,186 psi | 83% | 3484 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 80% | 40,727 psi | 63% | 3123 fps | 95.5% |
| Hodgdon H414 | 41.4 gr | 92% | 49,748 psi | 77% | 3373 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 92% | 53,592 psi | 82% | 3399 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 47,703 psi | 73% | 3287 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 32,590 psi | 50% | 2933 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,121 psi | 68% | 3251 fps | 99% |
| Hodgdon Superformance | <<locked>> | 92% | 50,328 psi | 77% | 3402 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,368 psi | 41% | 1962 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,759 psi | 70% | 3228 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 47,529 psi | 73% | 3287 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,206 psi | 65% | 3133 fps | 97.4% |
| IMR 4166 Enduron | <<locked>> | 82% | 47,485 psi | 73% | 3215 fps | 95% |
| IMR 4350 | <<locked>> | 94% | 49,705 psi | 76% | 3301 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 88% | 48,066 psi | 74% | 3255 fps | 95.1% |
| IMR 4831 | <<locked>> | 88% | 39,349 psi | 61% | 3120 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 44,005 psi | 68% | 3228 fps | 98.2% |
| IMR 8208 XBR | <<locked>> | 80% | 49,327 psi | 76% | 3284 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 46,978 psi | 72% | 3255 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,079 psi | 72% | 3205 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 42,351 psi | 65% | 3143 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 44,802 psi | 69% | 3186 fps | 95.8% |
| Lovex S070 | <<locked>> | 92% | 48,341 psi | 74% | 3278 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 46,093 psi | 71% | 3215 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 46,528 psi | 72% | 3228 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,308 psi | 65% | 3176 fps | 97.8% |
| Norma URP | <<locked>> | 86% | 38,029 psi | 59% | 3100 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 42,221 psi | 65% | 3186 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 92% | 45,600 psi | 70% | 3284 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 49,690 psi | 76% | 3287 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,182 psi | 76% | 3310 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 53,461 psi | 82% | 3343 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,919 psi | 41% | 2011 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 47,036 psi | 72% | 3235 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,818 psi | 70% | 3320 fps | 98% |
| ReloadSwiss RS 60 | 36.8 gr | 80% | 36,927 psi | 57% | 3143 fps | 99% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 40,857 psi | 63% | 3192 fps | 95.8% |
| ReloadSwiss RS 70 | 42.1 gr | 90% | 43,424 psi | 67% | 3274 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 50,415 psi | 78% | 3281 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,193 psi | 68% | 3166 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 37,405 psi | 58% | 3048 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 92% | 52,417 psi | 81% | 3337 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 44,802 psi | 69% | 3186 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,978 psi | 72% | 3255 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,351 psi | 65% | 3143 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 92% | 48,341 psi | 74% | 3278 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,682 psi | 60% | 3107 fps | 96.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,138 psi | 74% | 3261 fps | 97.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,021 psi | 71% | 3235 fps | 98.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,369 psi | 73% | 3169 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,639 psi | 61% | 3005 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 47,456 psi | 73% | 3186 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 53,954 psi | 83% | 3383 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,978 psi | 72% | 3166 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,776 psi | 74% | 3255 fps | 98.8% |
| Somchem S355 | <<locked>> | 80% | 38,043 psi | 59% | 3054 fps | 97.1% |
| Somchem S365 | <<locked>> | 82% | 29,878 psi | 46% | 2907 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 53,345 psi | 82% | 3248 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,732 psi | 73% | 3163 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,627 psi | 67% | 3146 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,135 psi | 68% | 3150 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,318 psi | 56% | 2982 fps | 98% |
| Vihtavuori N160 | <<locked>> | 86% | 39,668 psi | 61% | 3107 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 49,661 psi | 76% | 3284 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 42,873 psi | 66% | 3136 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 39,407 psi | 61% | 3110 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 92% | 35,969 psi | 55% | 3091 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,401 psi | 50% | 2884 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 49,893 psi | 77% | 3337 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 50,111 psi | 77% | 3376 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 33,475 psi | 51% | 3091 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,513 psi | 70% | 3235 fps | 98.9% |
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 112 powders for .22 Creedmoor loaded with the .224 | 64gr | Sierra Tipped GameKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,599 fps; across all powders the maximum-charge window runs from 2,192 fps to 3,599 fps. Accurate 3100 gives the best case fill at 100 %, and 112 of the 112 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 64.0 gr projectile in 0.224" calls for a 1:7.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, ADI AR 2209 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, ReloadSwiss RS 70, Hodgdon H414 rank at the top here: for .22 Creedmoor with the .224 | 64gr | Sierra Tipped GameKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate High Country, ADI AR 2209, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.