Load Specifications
Load data in caliber .260 Rem. with .264 | 126gr | Lehigh Defense Controlled Chaos 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.
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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% | 53,403 psi | 89% | 2664 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 51,938 psi | 86% | 2687 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 53,853 psi | 89% | 2753 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 51,517 psi | 86% | 2680 fps | 96.1% |
| Accurate 4064 | <<locked>> | 90% | 51,750 psi | 86% | 2730 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 51,126 psi | 85% | 2802 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 86% | 52,765 psi | 88% | 2762 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 53,664 psi | 89% | 2762 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 51,677 psi | 86% | 2713 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 52,069 psi | 87% | 2690 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 51,996 psi | 86% | 2871 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 53,447 psi | 89% | 2782 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 54,099 psi | 90% | 2802 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,997 psi | 88% | 2864 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,070 psi | 90% | 2900 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,550 psi | 62% | 2595 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,872 psi | 70% | 2749 fps | 97.3% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 52,344 psi | 87% | 2776 fps | 99.4% |
| Bofors RP3 | <<locked>> | 92% | 54,070 psi | 90% | 2799 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 54,215 psi | 90% | 2762 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 84% | 53,722 psi | 89% | 2700 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,375 psi | 90% | 2795 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 52,402 psi | 87% | 2831 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 90% | 51,445 psi | 85% | 2756 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 98% | 54,186 psi | 90% | 2854 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 94% | 51,634 psi | 86% | 2762 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 86% | 53,258 psi | 88% | 2772 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,110 psi | 82% | 2743 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 52,199 psi | 87% | 2802 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 51,213 psi | 85% | 2825 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,215 psi | 59% | 1686 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,346 psi | 90% | 2772 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 52,837 psi | 88% | 2753 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 53,301 psi | 89% | 2746 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 53,229 psi | 88% | 2723 fps | 97.3% |
| IMR 4350ᴾ | <<locked>> | 100% | 54,099 psi | 90% | 2785 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 94% | 52,779 psi | 88% | 2746 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,895 psi | 86% | 2799 fps | 99.4% |
| IMR 4895 | <<locked>> | 88% | 51,953 psi | 86% | 2782 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 84% | 51,677 psi | 86% | 2713 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 52,112 psi | 87% | 2740 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 52,547 psi | 87% | 2694 fps | 99.8% |
| Lovex S062 | <<locked>> | 90% | 52,750 psi | 88% | 2740 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 52,199 psi | 87% | 2740 fps | 98.4% |
| Lovex S070 | <<locked>> | 98% | 52,953 psi | 88% | 2772 fps | 97.6% |
| Norma 201 | <<locked>> | 86% | 51,605 psi | 86% | 2710 fps | 100% |
| Norma 202 | <<locked>> | 86% | 52,040 psi | 86% | 2713 fps | 100% |
| Norma 203B | <<locked>> | 90% | 53,301 psi | 89% | 2792 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 53,911 psi | 90% | 2844 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 90% | 53,635 psi | 89% | 2815 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,924 psi | 88% | 2841 fps | 98.2% |
| Ramshot TAC | <<locked>> | 84% | 51,793 psi | 86% | 2726 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 84% | 51,474 psi | 86% | 2749 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 52,460 psi | 87% | 2713 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,723 psi | 59% | 1726 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,389 psi | 90% | 2743 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 51,779 psi | 86% | 2736 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 50,850 psi | 84% | 2812 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 53,853 psi | 89% | 2900 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,346 psi | 90% | 2877 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 51,024 psi | 85% | 2851 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 84% | 52,562 psi | 87% | 2694 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 52,083 psi | 87% | 2710 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 53,853 psi | 89% | 2789 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 54,215 psi | 90% | 2762 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 96% | 52,199 psi | 87% | 2740 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 86% | 52,112 psi | 87% | 2740 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 52,750 psi | 88% | 2740 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 52,953 psi | 88% | 2772 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 51,880 psi | 86% | 2795 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 53,925 psi | 90% | 2762 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 51,169 psi | 85% | 2733 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 53,243 psi | 88% | 2654 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 53,142 psi | 88% | 2651 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 52,141 psi | 87% | 2690 fps | 97.1% |
| Somchem S321 | <<locked>> | 82% | 52,620 psi | 87% | 2743 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 52,576 psi | 87% | 2654 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 53,359 psi | 89% | 2753 fps | 99.8% |
| Somchem S355 | <<locked>> | 94% | 54,056 psi | 90% | 2785 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,182 psi | 80% | 2792 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 52,750 psi | 88% | 2615 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 53,432 psi | 89% | 2641 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 51,605 psi | 86% | 2677 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 52,330 psi | 87% | 2690 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 52,344 psi | 87% | 2720 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 53,011 psi | 88% | 2789 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 84% | 52,112 psi | 87% | 2713 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 53,809 psi | 89% | 2733 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 51,967 psi | 86% | 2795 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,770 psi | 68% | 2674 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 53,490 psi | 89% | 2772 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 51,837 psi | 86% | 2759 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 51,039 psi | 85% | 2802 fps | 97.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,750 psi | 56% | 2592 fps | 97.8% |
| Winchester StaBALL Match | <<locked>> | 88% | 54,317 psi | 90% | 2792 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% | 47,369 psi | 79% | 2575 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,205 psi | 67% | 2507 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,007 psi | 78% | 2651 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 48,269 psi | 80% | 2628 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 38,000 psi | 63% | 2500 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 33,881 psi | 56% | 2474 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 43,598 psi | 72% | 2608 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 37,159 psi | 62% | 2461 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,687 psi | 76% | 2615 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 45,847 psi | 76% | 2605 fps | 100% |
| Alliant Power Pro 2000-MR | 36.5 gr | 80% | 39,421 psi | 65% | 2628 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,521 psi | 61% | 2480 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,378 psi | 65% | 2543 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 34,330 psi | 57% | 2487 fps | 95.4% |
| Alliant Reloder-17 | 36 gr | 80% | 31,633 psi | 53% | 2444 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 94% | 31,314 psi | 52% | 2438 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 36,303 psi | 60% | 2618 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,714 psi | 71% | 2608 fps | 98% |
| Bofors RP3 | <<locked>> | 80% | 36,289 psi | 60% | 2487 fps | 98.4% |
| Bofors RP7 | <<locked>> | 92% | 47,848 psi | 79% | 2661 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,543 psi | 79% | 2605 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,266 psi | 74% | 2635 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,936 psi | 81% | 2776 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 80% | 36,985 psi | 61% | 2484 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 92% | 44,599 psi | 74% | 2690 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 92% | 48,733 psi | 81% | 2713 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 43,990 psi | 73% | 2618 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 29,472 psi | 49% | 2333 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,813 psi | 66% | 2589 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 94% | 47,877 psi | 80% | 2769 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,455 psi | 44% | 1509 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,264 psi | 70% | 2572 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 43,395 psi | 72% | 2612 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,957 psi | 65% | 2493 fps | 97.7% |
| IMR 4166 Enduron | <<locked>> | 82% | 44,150 psi | 73% | 2566 fps | 95.3% |
| IMR 4350 | <<locked>> | 96% | 47,805 psi | 79% | 2684 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 44,106 psi | 73% | 2592 fps | 95.1% |
| IMR 4831 | <<locked>> | 88% | 35,157 psi | 58% | 2487 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 40,306 psi | 67% | 2572 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 80% | 45,687 psi | 76% | 2615 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 42,511 psi | 71% | 2585 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,845 psi | 73% | 2546 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 38,943 psi | 65% | 2500 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 38,493 psi | 64% | 2490 fps | 95.2% |
| Lovex S070 | <<locked>> | 92% | 43,758 psi | 73% | 2615 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 42,902 psi | 71% | 2562 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 42,844 psi | 71% | 2566 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,740 psi | 64% | 2533 fps | 98.1% |
| Norma URP | <<locked>> | 86% | 34,374 psi | 57% | 2477 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 38,087 psi | 63% | 2539 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 40,654 psi | 68% | 2618 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 45,585 psi | 76% | 2618 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,831 psi | 74% | 2638 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,197 psi | 82% | 2661 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,716 psi | 44% | 1545 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,271 psi | 85% | 2697 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,902 psi | 71% | 2579 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,118 psi | 68% | 2641 fps | 98.1% |
| ReloadSwiss RS 60 | 36 gr | 80% | 33,678 psi | 56% | 2513 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,911 psi | 60% | 2543 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 38,812 psi | 64% | 2608 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 46,746 psi | 78% | 2605 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,799 psi | 68% | 2516 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 33,997 psi | 56% | 2428 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 92% | 47,848 psi | 79% | 2661 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 38,493 psi | 64% | 2490 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,511 psi | 71% | 2585 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,943 psi | 65% | 2500 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 92% | 43,758 psi | 73% | 2615 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,969 psi | 58% | 2477 fps | 96.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,816 psi | 73% | 2592 fps | 97.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,032 psi | 70% | 2575 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,063 psi | 73% | 2516 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,564 psi | 61% | 2385 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 43,105 psi | 72% | 2539 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 49,255 psi | 82% | 2690 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,903 psi | 73% | 2523 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,482 psi | 72% | 2592 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 35,099 psi | 58% | 2441 fps | 97.5% |
| Somchem S365 | <<locked>> | 82% | 27,079 psi | 45% | 2323 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 49,719 psi | 83% | 2575 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,338 psi | 74% | 2510 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,958 psi | 66% | 2497 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,625 psi | 67% | 2507 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,156 psi | 55% | 2375 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 86% | 35,969 psi | 60% | 2480 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 45,832 psi | 76% | 2612 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 39,059 psi | 65% | 2493 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 35,331 psi | 59% | 2480 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 92% | 31,618 psi | 53% | 2464 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,486 psi | 49% | 2300 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 45,252 psi | 75% | 2654 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 44,599 psi | 74% | 2690 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,646 psi | 49% | 2457 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,640 psi | 69% | 2582 fps | 99.1% |
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 112 powders for .260 Rem. loaded with the .264 | 126gr | Lehigh Defense Controlled Chaos. Alliant Reloder-17 delivers the highest muzzle velocity at 2,900 fps; across all powders the maximum-charge window runs from 1,686 fps to 2,900 fps. Accurate 3100 gives the best case fill at 100 %, and 112 of the 112 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 126.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-16 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 | 126gr | Lehigh Defense Controlled Chaos they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, Alliant Reloder-22 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.