Load Specifications
Load data in caliber .260 Rem. with .264 | 120gr | Barnes Solid bullet and 96 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>> | 84% | 52,388 psi | 87% | 2720 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,070 psi | 90% | 2789 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,128 psi | 90% | 2789 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 52,446 psi | 87% | 2805 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,998 psi | 90% | 2782 fps | 96.2% |
| Accurate 4064 | <<locked>> | 92% | 53,853 psi | 89% | 2831 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,432 psi | 89% | 2907 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 86% | 51,590 psi | 86% | 2815 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 92% | 52,402 psi | 87% | 2808 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,998 psi | 90% | 2818 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 50,865 psi | 85% | 2749 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,346 psi | 90% | 2979 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 52,373 psi | 87% | 2838 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 90% | 52,707 psi | 88% | 2851 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,779 psi | 86% | 2910 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 96% | 52,649 psi | 87% | 2949 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,869 psi | 61% | 2638 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,857 psi | 68% | 2785 fps | 96.4% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 51,285 psi | 85% | 2828 fps | 99% |
| Bofors RP3 | <<locked>> | 92% | 52,823 psi | 88% | 2851 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 53,156 psi | 88% | 2812 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 52,721 psi | 88% | 2756 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,345 psi | 89% | 2851 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 51,285 psi | 85% | 2884 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 92% | 53,853 psi | 89% | 2861 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 98% | 53,127 psi | 88% | 2904 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 86% | 52,054 psi | 86% | 2825 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,863 psi | 80% | 2789 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 51,126 psi | 85% | 2858 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 98% | 54,027 psi | 90% | 2936 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,259 psi | 59% | 1736 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,505 psi | 89% | 2831 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 51,590 psi | 86% | 2812 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 52,069 psi | 87% | 2795 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 88% | 52,460 psi | 87% | 2776 fps | 96.7% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,214 psi | 88% | 2838 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 94% | 51,808 psi | 86% | 2795 fps | 96.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,502 psi | 84% | 2844 fps | 98.9% |
| IMR 4895 | <<locked>> | 90% | 54,041 psi | 90% | 2884 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 53,998 psi | 90% | 2818 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,259 psi | 90% | 2805 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,273 psi | 90% | 2841 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 51,547 psi | 86% | 2746 fps | 99.6% |
| Lovex S062 | <<locked>> | 90% | 51,880 psi | 86% | 2795 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,143 psi | 90% | 2838 fps | 98.3% |
| Lovex S070 | <<locked>> | 98% | 51,735 psi | 86% | 2822 fps | 96.9% |
| Norma 201 | <<locked>> | 88% | 53,476 psi | 89% | 2812 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,317 psi | 90% | 2818 fps | 100% |
| Norma 203B | <<locked>> | 90% | 51,924 psi | 86% | 2838 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 52,533 psi | 87% | 2894 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 90% | 52,373 psi | 87% | 2864 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,488 psi | 86% | 2884 fps | 97.6% |
| Ramshot TAC | <<locked>> | 86% | 54,186 psi | 90% | 2831 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,882 psi | 90% | 2854 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 51,663 psi | 86% | 2769 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,737 psi | 59% | 1778 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,664 psi | 89% | 2802 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,157 psi | 90% | 2838 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 52,881 psi | 88% | 2917 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 52,533 psi | 87% | 2953 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,055 psi | 88% | 2930 fps | 99% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,432 psi | 89% | 2956 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 84% | 51,590 psi | 86% | 2749 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,954 psi | 90% | 2808 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 52,315 psi | 87% | 2838 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 96% | 53,156 psi | 88% | 2812 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,143 psi | 90% | 2838 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,273 psi | 90% | 2841 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 51,880 psi | 86% | 2795 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 51,735 psi | 86% | 2822 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,128 psi | 90% | 2900 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 52,475 psi | 87% | 2805 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,200 psi | 88% | 2835 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 52,243 psi | 87% | 2710 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 51,938 psi | 86% | 2707 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 51,358 psi | 85% | 2740 fps | 96.5% |
| Somchem S321 | <<locked>> | 82% | 51,721 psi | 86% | 2799 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 51,517 psi | 86% | 2710 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 52,330 psi | 87% | 2805 fps | 99.6% |
| Somchem S355 | <<locked>> | 94% | 52,982 psi | 88% | 2838 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,166 psi | 78% | 2848 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 51,924 psi | 86% | 2674 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 52,431 psi | 87% | 2697 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 53,592 psi | 89% | 2776 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 51,474 psi | 86% | 2749 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,404 psi | 90% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 51,677 psi | 86% | 2838 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 86% | 54,462 psi | 90% | 2818 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 52,837 psi | 88% | 2792 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,462 psi | 90% | 2900 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,827 psi | 66% | 2717 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 52,417 psi | 87% | 2825 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 54,346 psi | 90% | 2867 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,127 psi | 88% | 2904 fps | 97.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,808 psi | 55% | 2612 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,200 psi | 88% | 2844 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% | 46,514 psi | 77% | 2635 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,604 psi | 84% | 2740 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,972 psi | 65% | 2552 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,890 psi | 76% | 2703 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 50,241 psi | 83% | 2723 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 36,869 psi | 61% | 2543 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 35,259 psi | 59% | 2569 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 42,757 psi | 71% | 2657 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 36,434 psi | 61% | 2507 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,773 psi | 74% | 2667 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 44,483 psi | 74% | 2654 fps | 100% |
| Alliant Power Pro 2000-MR | 37.2 gr | 80% | 38,725 psi | 64% | 2674 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,752 psi | 59% | 2526 fps | 97.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,551 psi | 64% | 2589 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,824 psi | 60% | 2582 fps | 95.4% |
| Alliant Reloder-17 | 36.6 gr | 80% | 30,908 psi | 51% | 2480 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 96% | 32,663 psi | 54% | 2530 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 37,956 psi | 63% | 2717 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,655 psi | 69% | 2651 fps | 97.3% |
| Bofors RP3 | <<locked>> | 80% | 35,360 psi | 59% | 2526 fps | 97.7% |
| Bofors RP7 | <<locked>> | 94% | 49,806 psi | 83% | 2759 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,717 psi | 78% | 2661 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,511 psi | 72% | 2687 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,601 psi | 79% | 2825 fps | 99% |
| Hodgdon H380 | <<locked>> | 82% | 38,609 psi | 64% | 2582 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 94% | 46,557 psi | 77% | 2789 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 43,091 psi | 72% | 2667 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,792 psi | 51% | 2425 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,827 psi | 65% | 2631 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 96% | 50,125 psi | 83% | 2871 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,339 psi | 44% | 1552 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,437 psi | 69% | 2618 fps | 98.6% |
| IMR 3031 | <<locked>> | 80% | 42,467 psi | 71% | 2664 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,232 psi | 64% | 2539 fps | 97% |
| IMR 4166 Enduron | <<locked>> | 84% | 46,166 psi | 77% | 2664 fps | 95.3% |
| IMR 4350 | <<locked>> | 98% | 49,893 psi | 83% | 2782 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,919 psi | 76% | 2690 fps | 95.1% |
| IMR 4831 | <<locked>> | 90% | 36,506 psi | 61% | 2579 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 39,421 psi | 65% | 2618 fps | 97.9% |
| IMR 8208 XBR | <<locked>> | 80% | 44,773 psi | 74% | 2667 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 50,444 psi | 84% | 2749 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,466 psi | 69% | 2631 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 42,844 psi | 71% | 2592 fps | 98.5% |
| Lovex S062 | <<locked>> | 80% | 37,884 psi | 63% | 2543 fps | 98.6% |
| Lovex S065 | <<locked>> | 88% | 39,798 psi | 66% | 2579 fps | 95% |
| Lovex S070 | <<locked>> | 94% | 45,440 psi | 75% | 2710 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 41,785 psi | 69% | 2608 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 42,032 psi | 70% | 2621 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,913 psi | 63% | 2575 fps | 97.5% |
| Norma URP | <<locked>> | 88% | 35,795 psi | 59% | 2572 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 37,391 psi | 62% | 2585 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 94% | 42,380 psi | 70% | 2717 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 44,614 psi | 74% | 2664 fps | 96.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,092 psi | 73% | 2690 fps | 98.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,196 psi | 80% | 2710 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,571 psi | 44% | 1588 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,270 psi | 84% | 2753 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 44,628 psi | 74% | 2677 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,016 psi | 66% | 2684 fps | 97.4% |
| ReloadSwiss RS 60 | 36.6 gr | 80% | 32,880 psi | 55% | 2549 fps | 98.5% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 37,478 psi | 62% | 2638 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,495 psi | 67% | 2703 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 45,629 psi | 76% | 2651 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,755 psi | 66% | 2559 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 80% | 33,170 psi | 55% | 2470 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 94% | 49,806 psi | 83% | 2759 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,798 psi | 66% | 2579 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,466 psi | 69% | 2631 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 37,884 psi | 63% | 2543 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 94% | 45,440 psi | 75% | 2710 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,127 psi | 57% | 2516 fps | 96.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,772 psi | 71% | 2638 fps | 96.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,147 psi | 68% | 2621 fps | 98.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,352 psi | 72% | 2569 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,911 psi | 60% | 2434 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 44,875 psi | 75% | 2631 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 48,167 psi | 80% | 2743 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 42,786 psi | 71% | 2569 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,424 psi | 70% | 2635 fps | 98.3% |
| Somchem S355 | <<locked>> | 80% | 34,069 psi | 57% | 2477 fps | 96.8% |
| Somchem S365 | <<locked>> | 84% | 27,992 psi | 47% | 2405 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 48,950 psi | 81% | 2631 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,584 psi | 72% | 2566 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,160 psi | 65% | 2549 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,769 psi | 66% | 2556 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,430 psi | 54% | 2418 fps | 97.6% |
| Vihtavuori N160 | <<locked>> | 88% | 37,420 psi | 62% | 2572 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 44,904 psi | 75% | 2664 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 38,218 psi | 63% | 2543 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 36,680 psi | 61% | 2572 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 94% | 32,721 psi | 54% | 2552 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,879 psi | 51% | 2388 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 44,164 psi | 73% | 2703 fps | 99.9% |
| Winchester 760 | <<locked>> | 94% | 46,557 psi | 77% | 2789 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,748 psi | 51% | 2543 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,625 psi | 67% | 2628 fps | 98.6% |
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 107 powders for .260 Rem. loaded with the .264 | 120gr | Barnes Solid. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,979 fps; across all powders the maximum-charge window runs from 1,736 fps to 2,979 fps. Accurate 3100 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 55–90 %, 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 3100, Accurate 4350, 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, Alliant Reloder-17, Alliant Power Pro 2000-MR rank at the top here: for .260 Rem. with the .264 | 120gr | Barnes Solid they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, 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.