Load Specifications
Load data in caliber .260 Rem. with .264 | 120gr | Barnes TSX BT bullet and 95 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 60 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.
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>> | 84% | 52,707 psi | 88% | 2743 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,853 psi | 89% | 2802 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 52,895 psi | 88% | 2828 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,273 psi | 90% | 2808 fps | 96.5% |
| Accurate 4064 | <<locked>> | 92% | 53,969 psi | 90% | 2851 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,969 psi | 90% | 2930 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 51,822 psi | 86% | 2835 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 92% | 52,968 psi | 88% | 2838 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,331 psi | 90% | 2841 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 51,459 psi | 85% | 2769 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 51,329 psi | 85% | 2946 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 52,489 psi | 87% | 2854 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,214 psi | 88% | 2877 fps | 99.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,069 psi | 87% | 2936 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 96% | 53,243 psi | 88% | 2976 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,840 psi | 61% | 2657 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,176 psi | 68% | 2812 fps | 96.8% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 51,721 psi | 86% | 2851 fps | 99.2% |
| Bofors RP3 | <<locked>> | 92% | 53,113 psi | 88% | 2871 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 53,432 psi | 89% | 2838 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 84% | 52,692 psi | 88% | 2776 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,374 psi | 89% | 2867 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 51,648 psi | 86% | 2907 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 92% | 54,128 psi | 90% | 2884 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 98% | 53,417 psi | 89% | 2927 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 86% | 52,301 psi | 87% | 2848 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,167 psi | 80% | 2808 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 51,648 psi | 86% | 2881 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 50,778 psi | 84% | 2900 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,041 psi | 58% | 1745 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,795 psi | 89% | 2854 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 52,054 psi | 86% | 2835 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 52,330 psi | 87% | 2818 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 88% | 52,605 psi | 87% | 2795 fps | 97% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,853 psi | 89% | 2864 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 94% | 52,214 psi | 87% | 2822 fps | 96.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,097 psi | 85% | 2867 fps | 99.1% |
| IMR 4895 | <<locked>> | 88% | 51,184 psi | 85% | 2854 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 86% | 54,331 psi | 90% | 2841 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,273 psi | 90% | 2825 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 51,184 psi | 85% | 2812 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 51,909 psi | 86% | 2769 fps | 99.7% |
| Lovex S062 | <<locked>> | 90% | 51,953 psi | 86% | 2815 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,360 psi | 90% | 2861 fps | 98.5% |
| Lovex S070 | <<locked>> | 98% | 51,895 psi | 86% | 2841 fps | 97.2% |
| Norma 201 | <<locked>> | 88% | 53,983 psi | 90% | 2835 fps | 100% |
| Norma 202 | <<locked>> | 86% | 51,155 psi | 85% | 2789 fps | 100% |
| Norma 203B | <<locked>> | 90% | 52,388 psi | 87% | 2864 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 53,214 psi | 88% | 2920 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 90% | 52,794 psi | 88% | 2887 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,315 psi | 87% | 2917 fps | 98% |
| Ramshot TAC | <<locked>> | 84% | 51,314 psi | 85% | 2802 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,375 psi | 90% | 2877 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 51,837 psi | 86% | 2789 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,447 psi | 59% | 1788 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,650 psi | 89% | 2818 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 51,082 psi | 85% | 2808 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 53,548 psi | 89% | 2943 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 53,258 psi | 88% | 2979 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,548 psi | 89% | 2953 fps | 99.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,795 psi | 89% | 2982 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 84% | 51,285 psi | 85% | 2766 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,418 psi | 90% | 2831 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 52,576 psi | 87% | 2858 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 53,432 psi | 89% | 2838 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,360 psi | 90% | 2861 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 51,184 psi | 85% | 2812 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 51,953 psi | 86% | 2815 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 51,895 psi | 86% | 2841 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 51,459 psi | 85% | 2874 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 52,808 psi | 88% | 2831 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,693 psi | 89% | 2861 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 52,272 psi | 87% | 2730 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 52,562 psi | 87% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 51,532 psi | 86% | 2762 fps | 96.8% |
| Somchem S321 | <<locked>> | 82% | 51,822 psi | 86% | 2818 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 51,677 psi | 86% | 2726 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 52,765 psi | 88% | 2828 fps | 99.8% |
| Somchem S355 | <<locked>> | 94% | 53,345 psi | 89% | 2861 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,688 psi | 79% | 2871 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 52,054 psi | 86% | 2694 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 52,533 psi | 87% | 2717 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 53,911 psi | 90% | 2795 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 51,721 psi | 86% | 2769 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 51,213 psi | 85% | 2789 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 52,402 psi | 87% | 2864 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 84% | 51,256 psi | 85% | 2785 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 53,243 psi | 88% | 2812 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 51,517 psi | 86% | 2871 fps | 98.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,885 psi | 66% | 2733 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 52,779 psi | 88% | 2844 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 51,155 psi | 85% | 2838 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,824 psi | 89% | 2933 fps | 97.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,938 psi | 55% | 2638 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,635 psi | 89% | 2871 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% | 46,528 psi | 77% | 2651 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,450 psi | 64% | 2559 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,977 psi | 76% | 2720 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 50,546 psi | 84% | 2749 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 36,376 psi | 60% | 2549 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 35,157 psi | 58% | 2579 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 42,685 psi | 71% | 2674 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 80% | 36,448 psi | 61% | 2523 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,817 psi | 74% | 2684 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 44,701 psi | 74% | 2674 fps | 100% |
| Alliant Power Pro 2000-MR | 38.3 gr | 80% | 38,885 psi | 65% | 2697 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,650 psi | 59% | 2539 fps | 97.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,406 psi | 64% | 2602 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,839 psi | 60% | 2602 fps | 95.7% |
| Alliant Reloder-17 | 37.7 gr | 80% | 30,821 psi | 51% | 2497 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,574 psi | 51% | 2490 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 38,189 psi | 63% | 2743 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,090 psi | 70% | 2677 fps | 97.6% |
| Bofors RP3 | <<locked>> | 80% | 35,085 psi | 58% | 2539 fps | 97.8% |
| Bofors RP7 | <<locked>> | 92% | 46,949 psi | 78% | 2726 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,804 psi | 78% | 2680 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,584 psi | 72% | 2707 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,341 psi | 80% | 2851 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 80% | 36,114 psi | 60% | 2543 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 92% | 43,801 psi | 73% | 2756 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 43,047 psi | 72% | 2684 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,719 psi | 51% | 2441 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,015 psi | 65% | 2651 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 94% | 47,195 psi | 78% | 2838 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,063 psi | 43% | 1562 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,466 psi | 69% | 2638 fps | 98.8% |
| IMR 3031 | <<locked>> | 80% | 42,627 psi | 71% | 2684 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,203 psi | 63% | 2556 fps | 97.2% |
| IMR 4166 Enduron | <<locked>> | 84% | 46,354 psi | 77% | 2687 fps | 95.6% |
| IMR 4350 | <<locked>> | 96% | 47,340 psi | 79% | 2756 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 46,064 psi | 77% | 2710 fps | 95.4% |
| IMR 4831 | <<locked>> | 88% | 34,272 psi | 57% | 2543 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 39,334 psi | 65% | 2635 fps | 98% |
| IMR 8208 XBR | <<locked>> | 80% | 44,817 psi | 74% | 2684 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 80% | 50,488 psi | 84% | 2769 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,524 psi | 69% | 2651 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 42,888 psi | 71% | 2612 fps | 98.7% |
| Lovex S062 | <<locked>> | 80% | 37,739 psi | 63% | 2556 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 40,030 psi | 67% | 2602 fps | 95.4% |
| Lovex S070 | <<locked>> | 92% | 43,047 psi | 72% | 2684 fps | 95% |
| Norma 201 | <<locked>> | 80% | 41,611 psi | 69% | 2625 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 42,003 psi | 70% | 2635 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,782 psi | 63% | 2592 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 35,795 psi | 59% | 2589 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 37,478 psi | 62% | 2605 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 94% | 42,815 psi | 71% | 2743 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 44,701 psi | 74% | 2684 fps | 96.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,266 psi | 74% | 2710 fps | 98.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,399 psi | 80% | 2733 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,237 psi | 44% | 1598 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,343 psi | 84% | 2769 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,872 psi | 70% | 2641 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,321 psi | 67% | 2707 fps | 97.7% |
| ReloadSwiss RS 60 | 37.7 gr | 80% | 32,851 psi | 55% | 2566 fps | 98.7% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,114 psi | 58% | 2602 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,985 psi | 63% | 2664 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 45,411 psi | 75% | 2667 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,566 psi | 66% | 2575 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 32,924 psi | 55% | 2480 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 92% | 46,949 psi | 78% | 2726 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 40,030 psi | 67% | 2602 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,524 psi | 69% | 2651 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 37,739 psi | 63% | 2556 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 92% | 43,047 psi | 72% | 2684 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,214 psi | 57% | 2536 fps | 96.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,786 psi | 71% | 2657 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,350 psi | 69% | 2641 fps | 98.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,439 psi | 72% | 2589 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,955 psi | 60% | 2451 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 45,092 psi | 75% | 2654 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 48,617 psi | 81% | 2766 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,728 psi | 71% | 2585 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,859 psi | 71% | 2661 fps | 98.6% |
| Somchem S355 | <<locked>> | 80% | 33,881 psi | 56% | 2490 fps | 96.9% |
| Somchem S365 | <<locked>> | 84% | 27,833 psi | 46% | 2418 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 49,153 psi | 82% | 2651 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,787 psi | 73% | 2585 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,175 psi | 65% | 2566 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,755 psi | 66% | 2569 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,213 psi | 54% | 2428 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 86% | 35,027 psi | 58% | 2536 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 44,889 psi | 75% | 2680 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 38,334 psi | 64% | 2559 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 36,840 psi | 61% | 2592 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 94% | 32,706 psi | 54% | 2566 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,705 psi | 51% | 2405 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 44,483 psi | 74% | 2726 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 43,801 psi | 73% | 2756 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,661 psi | 51% | 2562 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,770 psi | 68% | 2648 fps | 98.7% |
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 95 powders for .260 Rem. loaded with the .264 | 120gr | Barnes TSX BT. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,982 fps; across all powders the maximum-charge window runs from 1,745 fps to 2,982 fps. Accurate 4350 gives the best case fill at 100 %, and 95 of the 95 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 1:10.5 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .260 Rem. with the .264 | 120gr | Barnes TSX 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.