Load Specifications
Load data in caliber 6.5 Creedmoor with .257 | 115gr | Federal Trophy Bonded bullet and 97 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 52 and ReloadSwiss RS 60.
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.
A valid access license is required to use the Personalized Load Calculator.
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>> | 88% | 55,085 psi | 87% | 2795 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 53,272 psi | 84% | 2812 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 56,188 psi | 89% | 2858 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 54,940 psi | 87% | 2874 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 55,796 psi | 88% | 2897 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 47,834 psi | 76% | 2848 fps | 97.8% |
| Accurate LT-30 | <<locked>> | 82% | 54,375 psi | 86% | 2736 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 54,766 psi | 87% | 2759 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 54,085 psi | 86% | 2884 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 96% | 54,940 psi | 87% | 2877 fps | 99.2% |
| ADI AR 2219 | <<locked>> | 82% | 55,332 psi | 88% | 2861 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 56,797 psi | 90% | 2890 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 56,405 psi | 89% | 2864 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 54,795 psi | 87% | 2946 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 56,826 psi | 90% | 3045 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 54,230 psi | 86% | 2897 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 84% | 54,650 psi | 87% | 2799 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 55,013 psi | 87% | 2917 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,268 psi | 75% | 2851 fps | 97.8% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 54,766 psi | 87% | 3009 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 56,971 psi | 90% | 2779 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 53,635 psi | 85% | 2890 fps | 98.8% |
| Bofors RP3 | <<locked>> | 96% | 54,795 psi | 87% | 2913 fps | 99.9% |
| Bofors RP7ᴾ | <<locked>> | 100% | 55,288 psi | 88% | 2867 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 88% | 55,419 psi | 88% | 2825 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 55,709 psi | 88% | 2920 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 53,650 psi | 85% | 2956 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 84% | 53,606 psi | 85% | 2835 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 55,100 psi | 87% | 2867 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 56,144 psi | 89% | 2920 fps | 98.6% |
| Hodgdon H4895 | <<locked>> | 90% | 54,534 psi | 86% | 2894 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,265 psi | 69% | 2733 fps | 98.3% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 56,608 psi | 90% | 2972 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,751 psi | 55% | 1739 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 55,999 psi | 89% | 2897 fps | 99.8% |
| IMR 3031 | <<locked>> | 90% | 53,664 psi | 85% | 2881 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 54,462 psi | 86% | 2861 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 92% | 55,230 psi | 88% | 2838 fps | 96.3% |
| IMR 4198 | <<locked>> | 84% | 54,998 psi | 87% | 2759 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 54,201 psi | 86% | 2854 fps | 96% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,527 psi | 72% | 2789 fps | 97.4% |
| IMR 4895 | <<locked>> | 94% | 56,362 psi | 89% | 2949 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 90% | 56,797 psi | 90% | 2890 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 57,043 psi | 90% | 2877 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 56,565 psi | 90% | 2907 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 53,853 psi | 85% | 2808 fps | 99.4% |
| Lovex S062 | <<locked>> | 94% | 53,983 psi | 86% | 2858 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 52,968 psi | 84% | 2844 fps | 97.3% |
| Norma 201 | <<locked>> | 92% | 56,217 psi | 89% | 2881 fps | 100% |
| Norma 202 | <<locked>> | 92% | 56,608 psi | 90% | 2887 fps | 100% |
| Norma 203B | <<locked>> | 94% | 54,128 psi | 86% | 2904 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 47,471 psi | 75% | 2838 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 94% | 54,462 psi | 86% | 2930 fps | 99.4% |
| Ramshot TAC | <<locked>> | 88% | 53,751 psi | 85% | 2848 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 90% | 56,420 psi | 89% | 2923 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 86% | 54,433 psi | 86% | 2838 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,201 psi | 56% | 1781 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 56,362 psi | 89% | 2874 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 56,637 psi | 90% | 2900 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 54,969 psi | 87% | 2982 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 54,520 psi | 86% | 3015 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 47,630 psi | 75% | 2867 fps | 97.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 48,602 psi | 77% | 2887 fps | 96.9% |
| Rottweil R 901 | <<locked>> | 90% | 57,072 psi | 90% | 2864 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 56,362 psi | 89% | 2874 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 54,230 psi | 86% | 2897 fps | 99.8% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 55,288 psi | 88% | 2867 fps | 95.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 52,968 psi | 84% | 2844 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 92% | 56,565 psi | 90% | 2907 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 53,983 psi | 86% | 2858 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 56,057 psi | 89% | 2841 fps | 99.9% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 55,651 psi | 88% | 2871 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 56,391 psi | 89% | 2963 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 55,651 psi | 88% | 2822 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 55,506 psi | 88% | 2881 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 55,680 psi | 88% | 2900 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 54,563 psi | 86% | 2776 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 54,476 psi | 86% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 53,592 psi | 85% | 2799 fps | 96% |
| Somchem S321 | <<locked>> | 86% | 54,317 psi | 86% | 2871 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 54,056 psi | 86% | 2776 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 54,853 psi | 87% | 2871 fps | 99.5% |
| Somchem S355 | <<locked>> | 98% | 54,955 psi | 87% | 2897 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 42,554 psi | 67% | 2792 fps | 99.3% |
| Vihtavuori N130 | <<locked>> | 86% | 54,665 psi | 87% | 2749 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 54,563 psi | 86% | 2762 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 55,622 psi | 88% | 2844 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 57,072 psi | 90% | 2861 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 56,405 psi | 89% | 2877 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 50,256 psi | 80% | 2841 fps | 98% |
| Vihtavuori N530 | <<locked>> | 88% | 53,592 psi | 85% | 2835 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 94% | 55,317 psi | 88% | 2861 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 49,298 psi | 78% | 2844 fps | 97.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,198 psi | 81% | 2828 fps | 99.5% |
| Winchester 748 | <<locked>> | 90% | 56,666 psi | 90% | 2936 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 51,474 psi | 82% | 2900 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 92% | 55,288 psi | 88% | 2910 fps | 99.8% |
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% | 42,873 psi | 68% | 2608 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,717 psi | 74% | 2713 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,389 psi | 56% | 2520 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,742 psi | 66% | 2661 fps | 99.7% |
| Accurate 4064 | <<locked>> | 80% | 33,446 psi | 53% | 2500 fps | 99% |
| Accurate 4350 | <<locked>> | 94% | 38,667 psi | 61% | 2674 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 51,155 psi | 81% | 2690 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,517 psi | 82% | 2713 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,305 psi | 62% | 2612 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 82% | 35,810 psi | 57% | 2516 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 51,561 psi | 82% | 2805 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,278 psi | 65% | 2628 fps | 98.5% |
| Alliant AR-Comp | <<locked>> | 80% | 40,756 psi | 65% | 2638 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,863 psi | 76% | 2828 fps | 99.2% |
| Alliant Power Pro 2000-MR | 36.1 gr | 82% | 38,043 psi | 60% | 2677 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,692 psi | 52% | 2480 fps | 95.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,588 psi | 77% | 2710 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,157 psi | 56% | 2539 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 94% | 39,378 psi | 62% | 2687 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 86% | 34,316 psi | 54% | 2595 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,067 psi | 79% | 2684 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,145 psi | 60% | 2605 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 32,039 psi | 51% | 2477 fps | 95.8% |
| Bofors RP7 | <<locked>> | 98% | 51,967 psi | 82% | 2815 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,337 psi | 69% | 2625 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,653 psi | 63% | 2644 fps | 98.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,439 psi | 69% | 2776 fps | 97.5% |
| Hodgdon H322 | <<locked>> | 80% | 47,224 psi | 75% | 2736 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 48,022 psi | 76% | 2759 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 40,466 psi | 64% | 2648 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 39,566 psi | 63% | 2625 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 33,707 psi | 53% | 2523 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,534 psi | 56% | 2585 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,759 psi | 41% | 1552 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,101 psi | 60% | 2579 fps | 97.1% |
| IMR 3031 | <<locked>> | 80% | 38,624 psi | 61% | 2631 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,273 psi | 56% | 2497 fps | 95.1% |
| IMR 4166 Enduron | <<locked>> | 90% | 51,576 psi | 82% | 2779 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 48,849 psi | 77% | 2671 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 51,068 psi | 81% | 2802 fps | 95.3% |
| IMR 4831 | <<locked>> | 94% | 37,608 psi | 60% | 2631 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 35,969 psi | 57% | 2569 fps | 96% |
| IMR 8208 XBR | <<locked>> | 80% | 41,278 psi | 65% | 2628 fps | 98.5% |
| Lovex D073.5 | <<locked>> | 80% | 46,296 psi | 73% | 2713 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 37,724 psi | 60% | 2592 fps | 99.1% |
| Lovex S060 | <<locked>> | 80% | 39,914 psi | 63% | 2559 fps | 97.1% |
| Lovex S062 | <<locked>> | 80% | 34,795 psi | 55% | 2500 fps | 97% |
| Lovex S065 | <<locked>> | 94% | 44,135 psi | 70% | 2690 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 38,595 psi | 61% | 2572 fps | 98% |
| Norma 202 | <<locked>> | 80% | 38,682 psi | 61% | 2585 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 34,577 psi | 55% | 2530 fps | 95.5% |
| Norma URP | <<locked>> | 94% | 39,276 psi | 62% | 2677 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 82% | 36,521 psi | 58% | 2592 fps | 95.9% |
| Ramshot TAC | <<locked>> | 82% | 44,106 psi | 70% | 2680 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,451 psi | 64% | 2644 fps | 97.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,933 psi | 71% | 2677 fps | 98.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,947 psi | 41% | 1588 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,514 psi | 74% | 2720 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 46,905 psi | 74% | 2740 fps | 95.2% |
| ReloadSwiss RS 52 | 34.1 gr | 80% | 36,347 psi | 58% | 2631 fps | 95.4% |
| ReloadSwiss RS 60 | 34.6 gr | 80% | 30,023 psi | 48% | 2484 fps | 96.3% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 41,321 psi | 65% | 2746 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 45,353 psi | 72% | 2825 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 42,482 psi | 67% | 2628 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 36,622 psi | 58% | 2520 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 82% | 32,213 psi | 51% | 2474 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 98% | 51,967 psi | 82% | 2815 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 94% | 44,135 psi | 70% | 2690 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,724 psi | 60% | 2592 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 34,795 psi | 55% | 2500 fps | 97% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,197 psi | 78% | 2736 fps | 99.4% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 51,967 psi | 82% | 2815 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 35,578 psi | 56% | 2579 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,994 psi | 78% | 2726 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 42,018 psi | 67% | 2648 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,898 psi | 60% | 2579 fps | 96.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,118 psi | 64% | 2536 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,996 psi | 52% | 2402 fps | 99.3% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 49,792 psi | 79% | 2740 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 44,309 psi | 70% | 2707 fps | 99.2% |
| Somchem S335 | <<locked>> | 80% | 39,697 psi | 63% | 2543 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 38,856 psi | 62% | 2592 fps | 96.7% |
| Somchem S355 | <<locked>> | 82% | 33,199 psi | 53% | 2484 fps | 95.5% |
| Somchem S365 | <<locked>> | 90% | 30,951 psi | 49% | 2513 fps | 96% |
| Vihtavuori N130 | <<locked>> | 80% | 45,440 psi | 72% | 2612 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,263 psi | 64% | 2539 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,607 psi | 56% | 2516 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,666 psi | 58% | 2526 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 29,646 psi | 47% | 2375 fps | 95.7% |
| Vihtavuori N160 | <<locked>> | 92% | 38,754 psi | 61% | 2628 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 41,321 psi | 65% | 2625 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 80% | 35,056 psi | 56% | 2503 fps | 99% |
| Vihtavuori N550 | <<locked>> | 94% | 40,582 psi | 64% | 2684 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 34,519 psi | 55% | 2500 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 40,437 psi | 64% | 2667 fps | 99.1% |
| Winchester 760 | <<locked>> | 98% | 48,356 psi | 77% | 2848 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,014 psi | 59% | 2579 fps | 96.9% |
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 97 powders for 6.5 Creedmoor loaded with the .257 | 115gr | Federal Trophy Bonded. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,045 fps; across all powders the maximum-charge window runs from 1,739 fps to 3,045 fps. Accurate 4350 gives the best case fill at 100 %, and 97 of the 97 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 115.0 gr projectile in 0.264" calls for a 1:7.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 52, ReloadSwiss RS 60 rank at the top here: for 6.5 Creedmoor with the .257 | 115gr | Federal Trophy Bonded 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.