Load Specifications
Load data in caliber .223 Ackley Improved with .224 | 58gr | Peregrine Plainsmaster (VLR-4) bullet and 98 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2219, SNPE Vectan SP 10 and ReloadSwiss RS 40.
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 1680 | <<locked>> | 84% | 48,240 psi | 88% | 2986 fps | 99.9% |
| Accurate 1680 | <<locked>> | 84% | 48,979 psi | 89% | 2999 fps | 100% |
| Accurate 2015 | <<locked>> | 98% | 48,443 psi | 88% | 3071 fps | 99.7% |
| Accurate 2015 | <<locked>> | 98% | 48,588 psi | 88% | 3074 fps | 99.7% |
| Accurate 2460 | <<locked>> | 94% | 47,311 psi | 86% | 3064 fps | 97.6% |
| Accurate 2460 | <<locked>> | 94% | 47,456 psi | 86% | 3071 fps | 97.6% |
| Accurate 2495ᴾ | <<locked>> | 100% | 39,595 psi | 72% | 2976 fps | 98.9% |
| Accurate 2495ᴾ | <<locked>> | 100% | 39,784 psi | 72% | 2979 fps | 99% |
| Accurate 2520 | <<locked>> | 98% | 47,703 psi | 87% | 3107 fps | 97.3% |
| Accurate 2520 | <<locked>> | 98% | 47,819 psi | 87% | 3114 fps | 97.4% |
| Accurate 4064ᴾ | <<locked>> | 100% | 36,825 psi | 67% | 2927 fps | 95.8% |
| Accurate 4064ᴾ | <<locked>> | 100% | 37,014 psi | 67% | 2933 fps | 95.9% |
| Accurate LT-30 | <<locked>> | 90% | 49,400 psi | 90% | 3002 fps | 99% |
| Accurate LT-30 | <<locked>> | 90% | 49,545 psi | 90% | 3009 fps | 99% |
| Accurate LT-32 | <<locked>> | 88% | 46,847 psi | 85% | 2959 fps | 96.9% |
| Accurate LT-32 | <<locked>> | 88% | 46,992 psi | 85% | 2963 fps | 96.9% |
| ADI AR 2207 | <<locked>> | 88% | 48,370 psi | 88% | 3054 fps | 100% |
| ADI AR 2207 | <<locked>> | 88% | 49,240 psi | 89% | 3071 fps | 100% |
| ADI AR 2219 | <<locked>> | 90% | 47,065 psi | 85% | 3094 fps | 98.6% |
| ADI AR 2219 | <<locked>> | 90% | 47,181 psi | 86% | 3100 fps | 98.6% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 48,153 psi | 87% | 3156 fps | 100% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 48,283 psi | 88% | 3163 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 94% | 49,110 psi | 89% | 3110 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 94% | 49,298 psi | 89% | 3114 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 86% | 47,369 psi | 86% | 3015 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 86% | 47,543 psi | 86% | 3022 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 47,732 psi | 87% | 2979 fps | 99% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 48,399 psi | 88% | 2995 fps | 99.1% |
| Hodgdon Benchmark | <<locked>> | 96% | 48,240 psi | 88% | 3031 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 96% | 48,907 psi | 89% | 3048 fps | 96.2% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 48,617 psi | 88% | 3143 fps | 96.3% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 49,356 psi | 90% | 3159 fps | 96.5% |
| Hodgdon H322 | <<locked>> | 94% | 48,878 psi | 89% | 3130 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 94% | 49,052 psi | 89% | 3133 fps | 98.9% |
| Hodgdon H335 | <<locked>> | 92% | 46,630 psi | 85% | 3081 fps | 97.7% |
| Hodgdon H335 | <<locked>> | 92% | 46,731 psi | 85% | 3084 fps | 97.7% |
| Hodgdon H4198 | <<locked>> | 86% | 48,153 psi | 87% | 3005 fps | 98.3% |
| Hodgdon H4198 | <<locked>> | 86% | 48,356 psi | 88% | 3012 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,430 psi | 57% | 1936 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,778 psi | 58% | 1946 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 45,788 psi | 83% | 3136 fps | 99.1% |
| IMR 3031ᴾ | <<locked>> | 100% | 45,919 psi | 83% | 3140 fps | 99.1% |
| IMR 4198 | <<locked>> | 92% | 47,906 psi | 87% | 3048 fps | 100% |
| IMR 4198 | <<locked>> | 92% | 48,095 psi | 87% | 3051 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 48,182 psi | 87% | 2982 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 48,428 psi | 88% | 2989 fps | 100% |
| Lovex D073.4 | <<locked>> | 88% | 48,225 psi | 88% | 3094 fps | 97.1% |
| Lovex D073.4 | <<locked>> | 88% | 48,370 psi | 88% | 3097 fps | 97.1% |
| Lovex D073.5 | <<locked>> | 94% | 47,732 psi | 87% | 3068 fps | 96.4% |
| Lovex D073.5 | <<locked>> | 94% | 47,892 psi | 87% | 3071 fps | 96.4% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 44,875 psi | 81% | 3071 fps | 96.7% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 45,571 psi | 83% | 3084 fps | 96.9% |
| Lovex S053 | <<locked>> | 84% | 49,342 psi | 90% | 2969 fps | 100% |
| Lovex S053 | <<locked>> | 84% | 49,588 psi | 90% | 2976 fps | 100% |
| Norma 200 | <<locked>> | 90% | 49,443 psi | 90% | 3094 fps | 100% |
| Norma 200 | <<locked>> | 90% | 49,676 psi | 90% | 3100 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 46,427 psi | 84% | 3077 fps | 97.7% |
| Norma 202ᴾ | <<locked>> | 100% | 47,195 psi | 86% | 3094 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,372 psi | 57% | 1982 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,705 psi | 58% | 1991 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 47,834 psi | 87% | 3012 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 48,037 psi | 87% | 3018 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 94% | 48,631 psi | 88% | 3094 fps | 97% |
| ReloadSwiss RS 40 | <<locked>> | 94% | 48,747 psi | 88% | 3097 fps | 97.1% |
| Rottweil R 901 | <<locked>> | 98% | 47,688 psi | 87% | 3071 fps | 97.6% |
| Rottweil R 901 | <<locked>> | 98% | 47,863 psi | 87% | 3077 fps | 97.7% |
| Shooters World AR Plus | <<locked>> | 88% | 48,225 psi | 88% | 3094 fps | 97.1% |
| Shooters World AR Plus | <<locked>> | 88% | 48,370 psi | 88% | 3097 fps | 97.1% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 44,875 psi | 81% | 3071 fps | 96.7% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 45,571 psi | 83% | 3084 fps | 96.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 47,863 psi | 87% | 2785 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 48,066 psi | 87% | 2792 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 90% | 47,993 psi | 87% | 3100 fps | 97.8% |
| SNPE Vectan SP 10 | <<locked>> | 90% | 48,109 psi | 87% | 3107 fps | 97.9% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 47,398 psi | 86% | 3071 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 47,645 psi | 86% | 3077 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 98% | 47,558 psi | 86% | 2999 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 98% | 47,718 psi | 87% | 3002 fps | 97.7% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 39,987 psi | 73% | 2864 fps | 97.1% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 40,611 psi | 74% | 2881 fps | 97.3% |
| Somchem S321 | <<locked>> | 96% | 49,269 psi | 89% | 3117 fps | 96% |
| Somchem S321 | <<locked>> | 96% | 49,371 psi | 90% | 3123 fps | 96.1% |
| Somchem S335ᴾ | <<locked>> | 100% | 48,660 psi | 88% | 3038 fps | 98.7% |
| Somchem S335ᴾ | <<locked>> | 100% | 48,762 psi | 88% | 3041 fps | 98.7% |
| Vihtavuori N120 | <<locked>> | 88% | 48,472 psi | 88% | 3005 fps | 100% |
| Vihtavuori N120 | <<locked>> | 88% | 49,313 psi | 89% | 3018 fps | 100% |
| Vihtavuori N130 | <<locked>> | 94% | 47,326 psi | 86% | 3009 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 94% | 47,456 psi | 86% | 3012 fps | 99.9% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 49,211 psi | 89% | 3045 fps | 99.7% |
| Vihtavuori N133 | <<locked>> | 98% | 46,920 psi | 85% | 3009 fps | 99.5% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 40,959 psi | 74% | 2989 fps | 99% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 41,655 psi | 76% | 3002 fps | 99.1% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 44,324 psi | 80% | 3005 fps | 97.6% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 44,454 psi | 81% | 3012 fps | 97.6% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 42,641 psi | 77% | 2986 fps | 96.6% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 42,743 psi | 78% | 2989 fps | 96.7% |
| Winchester 748 | <<locked>> | 98% | 46,659 psi | 85% | 3110 fps | 96% |
| Winchester 748 | <<locked>> | 98% | 47,355 psi | 86% | 3123 fps | 96.2% |
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 1680 | <<locked>> | 80% | 42,540 psi | 77% | 2884 fps | 99.5% |
| Accurate 1680 | <<locked>> | 80% | 42,685 psi | 77% | 2890 fps | 99.6% |
| Accurate 2015 | <<locked>> | 82% | 28,892 psi | 52% | 2644 fps | 95.1% |
| Accurate 2015 | <<locked>> | 82% | 29,066 psi | 53% | 2651 fps | 95.2% |
| Accurate 2460 | <<locked>> | 88% | 38,392 psi | 70% | 2890 fps | 95.3% |
| Accurate 2460 | <<locked>> | 88% | 38,522 psi | 70% | 2894 fps | 95.4% |
| Accurate 2495 | <<locked>> | 90% | 27,818 psi | 50% | 2687 fps | 95.3% |
| Accurate 2495 | <<locked>> | 90% | 27,992 psi | 51% | 2694 fps | 95.4% |
| Accurate 2520 | <<locked>> | 94% | 41,118 psi | 75% | 2986 fps | 95.7% |
| Accurate 2520 | <<locked>> | 94% | 41,249 psi | 75% | 2989 fps | 95.7% |
| Accurate 4064 | <<locked>> | 98% | 34,418 psi | 62% | 2867 fps | 95% |
| Accurate 4064 | <<locked>> | 98% | 34,548 psi | 63% | 2874 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 36,042 psi | 65% | 2736 fps | 96.1% |
| Accurate LT-30 | <<locked>> | 80% | 36,216 psi | 66% | 2743 fps | 96.2% |
| Accurate LT-32 | <<locked>> | 84% | 41,307 psi | 75% | 2848 fps | 95.4% |
| Accurate LT-32 | <<locked>> | 84% | 41,510 psi | 75% | 2854 fps | 95.5% |
| ADI AR 2207 | <<locked>> | 80% | 37,579 psi | 68% | 2858 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 37,782 psi | 69% | 2864 fps | 100% |
| ADI AR 2219 | 22.1 gr | 82% | 35,824 psi | 65% | 2858 fps | 95.7% |
| ADI AR 2219 | 22.1 gr | 82% | 35,955 psi | 65% | 2864 fps | 95.9% |
| Alliant AR-Comp | <<locked>> | 80% | 24,860 psi | 45% | 2589 fps | 95.7% |
| Alliant AR-Comp | <<locked>> | 80% | 25,005 psi | 45% | 2595 fps | 95.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 31,343 psi | 57% | 2733 fps | 97.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 31,546 psi | 57% | 2740 fps | 97.4% |
| Alliant Reloder-7 | <<locked>> | 80% | 39,102 psi | 71% | 2858 fps | 99.4% |
| Alliant Reloder-7 | <<locked>> | 80% | 39,305 psi | 71% | 2864 fps | 99.4% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 34,156 psi | 62% | 2703 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 34,693 psi | 63% | 2720 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 94% | 45,382 psi | 82% | 2979 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 94% | 45,542 psi | 83% | 2982 fps | 95.4% |
| Hodgdon BL-C2 | <<locked>> | 98% | 45,571 psi | 83% | 3087 fps | 95.5% |
| Hodgdon BL-C2 | <<locked>> | 98% | 45,629 psi | 83% | 3091 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 84% | 34,853 psi | 63% | 2831 fps | 95.4% |
| Hodgdon H322 | <<locked>> | 84% | 35,041 psi | 64% | 2838 fps | 95.5% |
| Hodgdon H335 | <<locked>> | 86% | 37,594 psi | 68% | 2894 fps | 95.2% |
| Hodgdon H335 | <<locked>> | 86% | 38,203 psi | 69% | 2910 fps | 95.5% |
| Hodgdon H4198 | <<locked>> | 80% | 39,813 psi | 72% | 2838 fps | 96.5% |
| Hodgdon H4198 | <<locked>> | 80% | 40,001 psi | 73% | 2844 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,177 psi | 42% | 1739 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,061 psi | 42% | 1736 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 32,982 psi | 60% | 2844 fps | 95.7% |
| IMR 3031 | <<locked>> | 90% | 33,156 psi | 60% | 2851 fps | 95.8% |
| IMR 4198 | <<locked>> | 80% | 33,272 psi | 60% | 2740 fps | 98.6% |
| IMR 4198 | <<locked>> | 80% | 33,460 psi | 61% | 2746 fps | 98.7% |
| IMR 4227 | <<locked>> | 80% | 45,121 psi | 82% | 2933 fps | 100% |
| IMR 4227 | <<locked>> | 80% | 45,368 psi | 82% | 2936 fps | 100% |
| Lovex D073.4 | <<locked>> | 84% | 41,640 psi | 76% | 2969 fps | 95.4% |
| Lovex D073.4 | <<locked>> | 84% | 41,843 psi | 76% | 2972 fps | 95.5% |
| Lovex D073.5 | <<locked>> | 92% | 44,121 psi | 80% | 3002 fps | 95.5% |
| Lovex D073.5 | <<locked>> | 92% | 44,295 psi | 80% | 3005 fps | 95.6% |
| Lovex D073.6 | <<locked>> | 96% | 39,160 psi | 71% | 2956 fps | 95% |
| Lovex D073.6 | <<locked>> | 96% | 39,305 psi | 71% | 2959 fps | 95.1% |
| Lovex S053 | <<locked>> | 80% | 43,961 psi | 80% | 2884 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 44,222 psi | 80% | 2890 fps | 100% |
| Norma 200 | <<locked>> | 80% | 35,317 psi | 64% | 2818 fps | 99% |
| Norma 200 | <<locked>> | 80% | 35,520 psi | 64% | 2825 fps | 99% |
| Norma 202 | <<locked>> | 94% | 38,232 psi | 69% | 2910 fps | 95.6% |
| Norma 202 | <<locked>> | 94% | 38,377 psi | 70% | 2917 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,814 psi | 41% | 1775 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,148 psi | 42% | 1785 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 44,875 psi | 81% | 2963 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 45,092 psi | 82% | 2969 fps | 100% |
| ReloadSwiss RS 40 | 23.9 gr | 90% | 42,308 psi | 77% | 2969 fps | 95.4% |
| ReloadSwiss RS 40 | 23.9 gr | 90% | 42,409 psi | 77% | 2976 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 92% | 39,465 psi | 72% | 2907 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 92% | 39,668 psi | 72% | 2913 fps | 95.7% |
| Shooters World AR Plus | <<locked>> | 84% | 41,640 psi | 76% | 2969 fps | 95.4% |
| Shooters World AR Plus | <<locked>> | 84% | 41,843 psi | 76% | 2972 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 96% | 39,160 psi | 71% | 2956 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 96% | 39,305 psi | 71% | 2959 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 40,437 psi | 73% | 2671 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 40,698 psi | 74% | 2677 fps | 100% |
| SNPE Vectan SP 10 | 23.4 gr | 84% | 38,754 psi | 70% | 2917 fps | 95.5% |
| SNPE Vectan SP 10 | 23.4 gr | 84% | 38,914 psi | 71% | 2920 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 31,850 psi | 58% | 2730 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 32,039 psi | 58% | 2736 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 39,102 psi | 71% | 2835 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 39,218 psi | 71% | 2838 fps | 95.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 35,592 psi | 65% | 2769 fps | 95.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 33,489 psi | 61% | 2720 fps | 95% |
| Somchem S321 | <<locked>> | 94% | 46,253 psi | 84% | 3064 fps | 95.3% |
| Somchem S321 | <<locked>> | 94% | 46,340 psi | 84% | 3068 fps | 95.3% |
| Somchem S335 | <<locked>> | 90% | 35,578 psi | 65% | 2779 fps | 95.6% |
| Somchem S335 | <<locked>> | 90% | 35,752 psi | 65% | 2785 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 37,739 psi | 68% | 2818 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 37,971 psi | 69% | 2825 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 30,095 psi | 55% | 2638 fps | 96.6% |
| Vihtavuori N130 | <<locked>> | 80% | 30,269 psi | 55% | 2644 fps | 96.7% |
| Vihtavuori N133 | <<locked>> | 84% | 29,718 psi | 54% | 2631 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 84% | 29,878 psi | 54% | 2638 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 90% | 29,704 psi | 54% | 2717 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 90% | 29,863 psi | 54% | 2723 fps | 95.8% |
| Vihtavuori N140 | <<locked>> | 94% | 36,129 psi | 66% | 2831 fps | 95.2% |
| Vihtavuori N140 | <<locked>> | 94% | 36,274 psi | 66% | 2838 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 96% | 37,579 psi | 68% | 2877 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 96% | 37,666 psi | 68% | 2881 fps | 95.2% |
| Winchester 748 | <<locked>> | 96% | 43,801 psi | 79% | 3051 fps | 95.2% |
| Winchester 748 | <<locked>> | 96% | 43,903 psi | 80% | 3058 fps | 95.3% |
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 98 powders for .223 Ackley Improved loaded with the .224 | 58gr | Peregrine Plainsmaster (VLR-4). Alliant AR-Comp delivers the highest muzzle velocity at 3,163 fps; across all powders the maximum-charge window runs from 1,936 fps to 3,163 fps. Accurate 2495 gives the best case fill at 100 %, and 98 of the 98 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 58.0 gr projectile in 0.224" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 2495, Accurate 4064 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. ADI AR 2219, SNPE Vectan SP 10, ReloadSwiss RS 40 rank at the top here: for .223 Ackley Improved with the .224 | 58gr | Peregrine Plainsmaster (VLR-4) 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.