Load Specifications
Load data in caliber .25 Creedmoor with .257 | 120gr | Swift A-Frame bullet and 98 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance 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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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>> | 82% | 55,056 psi | 89% | 2694 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 54,215 psi | 87% | 2723 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,506 psi | 90% | 2785 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 52,924 psi | 85% | 2726 fps | 97.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,846 psi | 72% | 2690 fps | 97.5% |
| Accurate 4064 | <<locked>> | 88% | 54,520 psi | 88% | 2776 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,157 psi | 87% | 2861 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 54,404 psi | 88% | 2805 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,158 psi | 89% | 2802 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,576 psi | 85% | 2841 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,243 psi | 86% | 2753 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,331 psi | 88% | 2723 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,954 psi | 87% | 2923 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,767 psi | 90% | 2828 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,999 psi | 90% | 2848 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,317 psi | 89% | 2920 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 53,084 psi | 86% | 2900 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,343 psi | 83% | 2828 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,612 psi | 69% | 2720 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,848 psi | 77% | 2887 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,114 psi | 87% | 2818 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 52,605 psi | 85% | 2789 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 52,591 psi | 85% | 2762 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,578 psi | 88% | 2730 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 52,504 psi | 85% | 2779 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,650 psi | 87% | 2805 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 94% | 53,200 psi | 86% | 2858 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 92% | 53,795 psi | 87% | 2822 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 84% | 55,013 psi | 89% | 2815 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 55,434 psi | 89% | 2844 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,360 psi | 88% | 2844 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 53,809 psi | 87% | 2897 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,737 psi | 58% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,898 psi | 90% | 2812 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,027 psi | 89% | 2789 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,868 psi | 88% | 2789 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,462 psi | 88% | 2766 fps | 98.3% |
| IMR 4350 | <<locked>> | 96% | 53,055 psi | 86% | 2792 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,534 psi | 88% | 2795 fps | 98.3% |
| IMR 4831 | <<locked>> | 98% | 54,665 psi | 88% | 2851 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 53,867 psi | 87% | 2825 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 53,243 psi | 86% | 2753 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,302 psi | 88% | 2779 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,795 psi | 87% | 2733 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 54,940 psi | 89% | 2785 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,230 psi | 87% | 2792 fps | 99.2% |
| Lovex S070 | <<locked>> | 96% | 55,172 psi | 89% | 2828 fps | 98.6% |
| Norma 201 | <<locked>> | 84% | 53,272 psi | 86% | 2749 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,780 psi | 87% | 2749 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,201 psi | 89% | 2835 fps | 100% |
| Norma 204 | <<locked>> | 96% | 53,505 psi | 86% | 2838 fps | 96.5% |
| Norma MRPᴾ | <<locked>> | 100% | 47,471 psi | 77% | 2841 fps | 97.1% |
| Norma URP | <<locked>> | 96% | 53,345 psi | 86% | 2851 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 86% | 52,243 psi | 84% | 2805 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 55,477 psi | 89% | 2897 fps | 99.2% |
| Ramshot TAC | <<locked>> | 82% | 53,214 psi | 86% | 2769 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,200 psi | 86% | 2792 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,332 psi | 59% | 1762 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,780 psi | 87% | 2789 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 53,200 psi | 86% | 2861 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 52,475 psi | 85% | 2894 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,172 psi | 87% | 2887 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,214 psi | 86% | 2913 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 82% | 54,143 psi | 87% | 2730 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,722 psi | 87% | 2749 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 56,043 psi | 90% | 2831 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,343 psi | 81% | 2812 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 92% | 52,591 psi | 85% | 2762 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,230 psi | 87% | 2792 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,302 psi | 88% | 2779 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,940 psi | 89% | 2785 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,172 psi | 89% | 2828 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,331 psi | 88% | 2844 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,637 psi | 90% | 2808 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 52,823 psi | 85% | 2776 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,534 psi | 88% | 2687 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,955 psi | 89% | 2687 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,375 psi | 88% | 2746 fps | 98.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 49,850 psi | 80% | 2805 fps | 96.2% |
| Somchem S335 | <<locked>> | 84% | 54,027 psi | 87% | 2687 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,158 psi | 89% | 2795 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 52,837 psi | 85% | 2779 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 55,303 psi | 89% | 2904 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,039 psi | 82% | 2792 fps | 97.3% |
| Vihtavuori N133 | <<locked>> | 84% | 54,882 psi | 89% | 2671 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,650 psi | 87% | 2713 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 53,998 psi | 87% | 2723 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,157 psi | 87% | 2759 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,535 psi | 90% | 2841 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 53,650 psi | 87% | 2753 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,898 psi | 90% | 2772 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,897 psi | 89% | 2854 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,934 psi | 76% | 2792 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,869 psi | 90% | 2825 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,824 psi | 87% | 2799 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 53,592 psi | 86% | 2864 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,971 psi | 61% | 2736 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 52,678 psi | 85% | 2782 fps | 100% |
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% | 51,953 psi | 84% | 2654 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,614 psi | 72% | 2582 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,996 psi | 84% | 2736 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,366 psi | 70% | 2562 fps | 95.1% |
| Accurate 3100 | <<locked>> | 94% | 36,593 psi | 59% | 2526 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 42,163 psi | 68% | 2582 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,270 psi | 50% | 2415 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 47,863 psi | 77% | 2700 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 40,785 psi | 66% | 2552 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 98% | 49,139 psi | 79% | 2782 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,937 psi | 81% | 2700 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,111 psi | 82% | 2680 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,859 psi | 71% | 2743 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,538 psi | 65% | 2572 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,497 psi | 70% | 2638 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,589 psi | 51% | 2431 fps | 95.2% |
| Alliant Reloder-17 | 36.9 gr | 80% | 35,099 psi | 57% | 2552 fps | 98.3% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,138 psi | 78% | 2769 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,298 psi | 47% | 2398 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 90% | 33,678 psi | 54% | 2572 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,326 psi | 76% | 2707 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 40,524 psi | 65% | 2582 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 43,656 psi | 70% | 2605 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,634 psi | 83% | 2687 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,182 psi | 79% | 2726 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,234 psi | 67% | 2589 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 40,857 psi | 66% | 2631 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 88% | 47,268 psi | 76% | 2710 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 48,327 psi | 78% | 2710 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,095 psi | 47% | 2336 fps | 96.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,643 psi | 72% | 2687 fps | 99.9% |
| Hodgdon Superformance | 42.9 gr | 88% | 43,178 psi | 70% | 2703 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,818 psi | 43% | 1539 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,340 psi | 75% | 2661 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 48,327 psi | 78% | 2694 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,844 psi | 69% | 2585 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,310 psi | 73% | 2612 fps | 96.5% |
| IMR 4350 | <<locked>> | 90% | 44,106 psi | 71% | 2638 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,248 psi | 65% | 2536 fps | 95% |
| IMR 4831 | <<locked>> | 82% | 32,648 psi | 53% | 2434 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 44,570 psi | 72% | 2667 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 49,937 psi | 81% | 2700 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,543 psi | 77% | 2677 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,355 psi | 76% | 2628 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 42,670 psi | 69% | 2585 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 37,507 psi | 60% | 2484 fps | 95.8% |
| Lovex S070 | <<locked>> | 86% | 40,292 psi | 65% | 2562 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 46,746 psi | 75% | 2648 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,195 psi | 76% | 2651 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,859 psi | 69% | 2628 fps | 99.3% |
| Norma 204 | <<locked>> | 94% | 50,053 psi | 81% | 2782 fps | 95.8% |
| Norma MRP | <<locked>> | 96% | 41,582 psi | 67% | 2723 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 31,560 psi | 51% | 2418 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 42,656 psi | 69% | 2644 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 37,550 psi | 61% | 2569 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 50,024 psi | 81% | 2717 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,588 psi | 80% | 2733 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,137 psi | 44% | 1575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,365 psi | 67% | 2569 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,441 psi | 75% | 2749 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,347 psi | 60% | 2615 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 33,243 psi | 54% | 2487 fps | 95.5% |
| ReloadSwiss RS 70 | 39.4 gr | 84% | 35,491 psi | 57% | 2549 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 50,792 psi | 82% | 2680 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,512 psi | 72% | 2602 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,043 psi | 61% | 2526 fps | 99% |
| Rottweil R 905 | <<locked>> | 98% | 46,992 psi | 76% | 2753 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 86% | 43,656 psi | 70% | 2605 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,507 psi | 60% | 2484 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,543 psi | 77% | 2677 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,670 psi | 69% | 2585 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 40,292 psi | 65% | 2562 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,175 psi | 63% | 2579 fps | 98.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,544 psi | 78% | 2697 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,514 psi | 75% | 2671 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,080 psi | 78% | 2595 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,248 psi | 65% | 2464 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,756 psi | 67% | 2533 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 46,543 psi | 75% | 2749 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 47,601 psi | 77% | 2592 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,182 psi | 78% | 2687 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 38,653 psi | 62% | 2530 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 28,326 psi | 46% | 2372 fps | 97.3% |
| Somchem S385 | <<locked>> | 96% | 44,715 psi | 72% | 2684 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 48,486 psi | 78% | 2582 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,440 psi | 72% | 2579 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,773 psi | 72% | 2589 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,869 psi | 59% | 2467 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 32,953 psi | 53% | 2421 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 50,183 psi | 81% | 2700 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,323 psi | 70% | 2582 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,561 psi | 53% | 2425 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 86% | 29,675 psi | 48% | 2418 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,634 psi | 53% | 2398 fps | 97.7% |
| Winchester 748 | <<locked>> | 80% | 50,430 psi | 81% | 2749 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 41,162 psi | 66% | 2638 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,586 psi | 44% | 2418 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,963 psi | 74% | 2674 fps | 99.9% |
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 98 powders for .25 Creedmoor loaded with the .257 | 120gr | Swift A-Frame. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,923 fps; across all powders the maximum-charge window runs from 1,719 fps to 2,923 fps. Accurate 3100 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 (427 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.257" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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 70, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .25 Creedmoor with the .257 | 120gr | Swift A-Frame 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.