Load Specifications
Load data in caliber .260 Rem. with .264 | 120gr | Barnes TTSX BT bullet and 97 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 Alliant Power Pro 2000-MR.
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>> | 86% | 54,462 psi | 90% | 2756 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 52,837 psi | 88% | 2779 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 52,040 psi | 86% | 2769 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,433 psi | 90% | 2838 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 52,707 psi | 88% | 2769 fps | 95.9% |
| Accurate 4064 | <<locked>> | 92% | 52,257 psi | 87% | 2818 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 51,677 psi | 86% | 2884 fps | 99% |
| ADI AR 2206H | <<locked>> | 88% | 53,664 psi | 89% | 2851 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 51,605 psi | 86% | 2802 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 86% | 52,750 psi | 88% | 2805 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 53,098 psi | 88% | 2785 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,055 psi | 88% | 2963 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,128 psi | 90% | 2867 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,317 psi | 90% | 2762 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 51,706 psi | 86% | 2841 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,560 psi | 84% | 2894 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 96% | 51,314 psi | 85% | 2933 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,607 psi | 59% | 2615 fps | 97.1% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,388 psi | 89% | 2864 fps | 99.3% |
| Bofors RP3 | <<locked>> | 92% | 51,198 psi | 85% | 2831 fps | 99.9% |
| Bofors RP7 | <<locked>> | 96% | 51,822 psi | 86% | 2795 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 84% | 51,547 psi | 86% | 2743 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 51,895 psi | 86% | 2835 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 53,505 psi | 89% | 2927 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 82% | 53,229 psi | 88% | 2799 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,331 psi | 90% | 2828 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 52,388 psi | 87% | 2841 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 98% | 51,430 psi | 85% | 2881 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 88% | 54,157 psi | 90% | 2864 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,514 psi | 77% | 2772 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 53,214 psi | 88% | 2894 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 52,750 psi | 88% | 2920 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,114 psi | 58% | 1736 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 52,272 psi | 87% | 2815 fps | 99.8% |
| IMR 3031 | <<locked>> | 88% | 53,838 psi | 89% | 2848 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,346 psi | 90% | 2838 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,317 psi | 90% | 2808 fps | 97.1% |
| IMR 4350ᴾ | <<locked>> | 100% | 51,996 psi | 86% | 2822 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,056 psi | 90% | 2835 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,023 psi | 81% | 2825 fps | 98.7% |
| IMR 4895 | <<locked>> | 90% | 53,011 psi | 88% | 2874 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 52,750 psi | 88% | 2805 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 52,678 psi | 88% | 2789 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,040 psi | 88% | 2828 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,388 psi | 89% | 2779 fps | 99.8% |
| Lovex S062 | <<locked>> | 92% | 53,490 psi | 89% | 2825 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 52,750 psi | 88% | 2822 fps | 98.1% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,403 psi | 89% | 2851 fps | 97.2% |
| Norma 201 | <<locked>> | 88% | 52,388 psi | 87% | 2799 fps | 100% |
| Norma 202 | <<locked>> | 88% | 52,953 psi | 88% | 2805 fps | 100% |
| Norma 203B | <<locked>> | 92% | 53,998 psi | 90% | 2877 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 51,082 psi | 85% | 2877 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 90% | 51,068 psi | 85% | 2848 fps | 99.5% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,183 psi | 83% | 2867 fps | 97.3% |
| Ramshot TAC | <<locked>> | 86% | 52,953 psi | 88% | 2815 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 86% | 52,605 psi | 87% | 2841 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 84% | 53,766 psi | 89% | 2805 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,186 psi | 58% | 1772 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 52,373 psi | 87% | 2789 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 52,837 psi | 88% | 2825 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 51,474 psi | 86% | 2900 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 51,242 psi | 85% | 2936 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,517 psi | 86% | 2907 fps | 98.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,779 psi | 86% | 2933 fps | 98.5% |
| Rottweil R 901 | <<locked>> | 86% | 52,895 psi | 88% | 2779 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 52,852 psi | 88% | 2799 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 54,346 psi | 90% | 2874 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 51,822 psi | 86% | 2795 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 98% | 52,750 psi | 88% | 2822 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,040 psi | 88% | 2828 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 53,490 psi | 89% | 2825 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,403 psi | 89% | 2851 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 52,794 psi | 88% | 2884 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 51,053 psi | 85% | 2789 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 51,924 psi | 86% | 2818 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,157 psi | 90% | 2743 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,273 psi | 90% | 2740 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 53,142 psi | 88% | 2772 fps | 96.9% |
| Somchem S321 | <<locked>> | 84% | 53,780 psi | 89% | 2835 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 53,505 psi | 89% | 2743 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 51,024 psi | 85% | 2792 fps | 99.5% |
| Somchem S355 | <<locked>> | 94% | 51,488 psi | 86% | 2822 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,759 psi | 76% | 2828 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 54,143 psi | 90% | 2713 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,331 psi | 90% | 2730 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 52,069 psi | 87% | 2762 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,243 psi | 88% | 2779 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 52,953 psi | 88% | 2805 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,911 psi | 90% | 2877 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 86% | 53,156 psi | 88% | 2802 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 51,474 psi | 86% | 2776 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,069 psi | 88% | 2884 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,334 psi | 64% | 2690 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 51,242 psi | 85% | 2808 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 52,982 psi | 88% | 2854 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 51,837 psi | 86% | 2887 fps | 96.8% |
| Winchester StaBALL Match | <<locked>> | 88% | 51,895 psi | 86% | 2831 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% | 45,034 psi | 75% | 2618 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,994 psi | 81% | 2723 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,014 psi | 61% | 2523 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,324 psi | 74% | 2684 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 48,979 psi | 81% | 2707 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 35,056 psi | 58% | 2513 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 36,303 psi | 60% | 2598 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 41,452 psi | 69% | 2635 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 35,317 psi | 59% | 2487 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,584 psi | 72% | 2651 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 80% | 43,439 psi | 72% | 2644 fps | 100% |
| Alliant Power Pro 2000-MR | 37.1 gr | 80% | 37,579 psi | 62% | 2651 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,432 psi | 57% | 2500 fps | 97.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,720 psi | 84% | 2710 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,217 psi | 62% | 2566 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 90% | 36,782 psi | 61% | 2612 fps | 95.8% |
| Alliant Reloder-17 | 37.4 gr | 82% | 31,778 psi | 53% | 2513 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,444 psi | 52% | 2503 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,727 psi | 68% | 2638 fps | 97.1% |
| Bofors RP3 | <<locked>> | 80% | 33,881 psi | 56% | 2500 fps | 97.3% |
| Bofors RP7 | <<locked>> | 94% | 48,472 psi | 81% | 2740 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,571 psi | 76% | 2644 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,119 psi | 70% | 2667 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,282 psi | 77% | 2805 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 80% | 50,082 psi | 83% | 2753 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,850 psi | 84% | 2776 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 37,536 psi | 62% | 2566 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 94% | 45,237 psi | 75% | 2772 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 41,800 psi | 69% | 2648 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 31,430 psi | 52% | 2451 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,855 psi | 63% | 2615 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 96% | 48,863 psi | 81% | 2851 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,860 psi | 43% | 1545 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,292 psi | 67% | 2602 fps | 98.4% |
| IMR 3031 | <<locked>> | 80% | 41,075 psi | 68% | 2648 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,028 psi | 62% | 2520 fps | 96.7% |
| IMR 4166 Enduron | <<locked>> | 84% | 44,991 psi | 75% | 2648 fps | 95% |
| IMR 4350 | <<locked>> | 98% | 48,675 psi | 81% | 2766 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 92% | 47,485 psi | 79% | 2723 fps | 95.5% |
| IMR 4831 | <<locked>> | 90% | 35,128 psi | 58% | 2552 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 38,101 psi | 63% | 2598 fps | 97.6% |
| IMR 8208 XBR | <<locked>> | 80% | 43,584 psi | 72% | 2651 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 80% | 48,863 psi | 81% | 2733 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,219 psi | 67% | 2618 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 42,003 psi | 70% | 2582 fps | 98.4% |
| Lovex S062 | <<locked>> | 80% | 36,767 psi | 61% | 2526 fps | 98.3% |
| Lovex S065 | <<locked>> | 90% | 41,147 psi | 68% | 2615 fps | 95.5% |
| Lovex S070 | <<locked>> | 94% | 44,382 psi | 74% | 2697 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 40,306 psi | 67% | 2589 fps | 99% |
| Norma 202 | <<locked>> | 80% | 40,683 psi | 68% | 2602 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,579 psi | 61% | 2556 fps | 97.1% |
| Norma URP | <<locked>> | 90% | 36,709 psi | 61% | 2598 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 36,172 psi | 60% | 2566 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 96% | 43,961 psi | 73% | 2753 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 43,381 psi | 72% | 2648 fps | 96.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,859 psi | 71% | 2671 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,978 psi | 78% | 2697 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,310 psi | 44% | 1588 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,008 psi | 81% | 2736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 43,337 psi | 72% | 2657 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,667 psi | 64% | 2661 fps | 97.1% |
| ReloadSwiss RS 60 | 36.5 gr | 80% | 31,720 psi | 53% | 2523 fps | 98.1% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 36,129 psi | 60% | 2615 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 39,305 psi | 65% | 2684 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 44,295 psi | 74% | 2638 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,580 psi | 64% | 2543 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 80% | 31,734 psi | 53% | 2441 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 94% | 48,472 psi | 81% | 2740 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,147 psi | 68% | 2615 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,219 psi | 67% | 2618 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 36,767 psi | 61% | 2526 fps | 98.3% |
| Shooters World SW4350 | <<locked>> | 94% | 44,382 psi | 74% | 2697 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,938 psi | 55% | 2493 fps | 95.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,394 psi | 69% | 2618 fps | 96.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,929 psi | 66% | 2602 fps | 97.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,076 psi | 70% | 2552 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,737 psi | 58% | 2418 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 46,601 psi | 77% | 2667 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 47,123 psi | 78% | 2733 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 41,466 psi | 69% | 2552 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,466 psi | 69% | 2625 fps | 98.2% |
| Somchem S355 | <<locked>> | 80% | 32,721 psi | 54% | 2451 fps | 96.3% |
| Somchem S365 | <<locked>> | 86% | 28,660 psi | 48% | 2434 fps | 96% |
| Vihtavuori N130 | <<locked>> | 80% | 47,703 psi | 79% | 2618 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,380 psi | 70% | 2549 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,724 psi | 63% | 2530 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,508 psi | 64% | 2536 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 31,125 psi | 52% | 2392 fps | 97.2% |
| Vihtavuori N160 | <<locked>> | 88% | 36,158 psi | 60% | 2552 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 43,627 psi | 72% | 2648 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 80% | 37,202 psi | 62% | 2526 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 37,855 psi | 63% | 2605 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 96% | 33,286 psi | 55% | 2572 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 31,807 psi | 53% | 2421 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 42,859 psi | 71% | 2687 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 45,237 psi | 75% | 2772 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,334 psi | 65% | 2608 fps | 98.3% |
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 97 powders for .260 Rem. loaded with the .264 | 120gr | Barnes TTSX BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,963 fps; across all powders the maximum-charge window runs from 1,736 fps to 2,963 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 (415 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.264" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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, Alliant Power Pro 2000-MR rank at the top here: for .260 Rem. with the .264 | 120gr | Barnes TTSX BT 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.