Load Specifications
Load data in caliber .260 Rem. with .264 | 140gr | Hornady ECX bullet and 96 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and ReloadSwiss RS 70.
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>> | 82% | 51,721 psi | 86% | 2497 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 53,301 psi | 89% | 2562 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 52,011 psi | 86% | 2585 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 52,997 psi | 88% | 2572 fps | 97.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 40,509 psi | 67% | 2474 fps | 96.7% |
| Accurate 4064 | <<locked>> | 90% | 53,359 psi | 89% | 2608 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 53,505 psi | 89% | 2697 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 86% | 54,433 psi | 90% | 2644 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 52,330 psi | 87% | 2602 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 84% | 53,229 psi | 88% | 2595 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,273 psi | 90% | 2569 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,998 psi | 90% | 2759 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 51,822 psi | 86% | 2615 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 52,446 psi | 87% | 2638 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 98% | 51,503 psi | 86% | 2700 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 94% | 52,359 psi | 87% | 2733 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,986 psi | 65% | 2507 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,743 psi | 73% | 2664 fps | 98.8% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,099 psi | 90% | 2661 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 52,417 psi | 87% | 2635 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 52,620 psi | 87% | 2608 fps | 97.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 51,895 psi | 86% | 2536 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 52,417 psi | 87% | 2621 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 53,461 psi | 89% | 2648 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 96% | 52,953 psi | 88% | 2697 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 94% | 53,563 psi | 89% | 2657 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 84% | 51,343 psi | 85% | 2602 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,314 psi | 85% | 2635 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 50,894 psi | 85% | 2638 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 53,432 psi | 89% | 2733 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,592 psi | 59% | 1594 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 52,953 psi | 88% | 2612 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 51,677 psi | 86% | 2589 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 51,445 psi | 85% | 2582 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 51,401 psi | 85% | 2562 fps | 98% |
| IMR 4350 | <<locked>> | 98% | 53,026 psi | 88% | 2635 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 92% | 51,242 psi | 85% | 2589 fps | 97.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,302 psi | 90% | 2694 fps | 99.9% |
| IMR 4895 | <<locked>> | 88% | 53,795 psi | 89% | 2664 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 53,229 psi | 88% | 2595 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,027 psi | 90% | 2618 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,954 psi | 90% | 2575 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 51,242 psi | 85% | 2575 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,867 psi | 89% | 2631 fps | 99.3% |
| Lovex S070 | <<locked>> | 96% | 51,227 psi | 85% | 2615 fps | 98.2% |
| Norma 201 | <<locked>> | 86% | 52,968 psi | 88% | 2589 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,635 psi | 89% | 2592 fps | 100% |
| Norma 203B | <<locked>> | 88% | 51,663 psi | 86% | 2625 fps | 100% |
| Norma 204 | <<locked>> | 98% | 53,330 psi | 89% | 2680 fps | 96.7% |
| Norma MRPᴾ | <<locked>> | 100% | 43,526 psi | 72% | 2618 fps | 96.3% |
| Norma URP | <<locked>> | 98% | 52,504 psi | 87% | 2684 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 88% | 52,098 psi | 87% | 2651 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 51,401 psi | 85% | 2684 fps | 98.8% |
| Ramshot TAC | <<locked>> | 84% | 53,606 psi | 89% | 2618 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 84% | 52,982 psi | 88% | 2631 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,056 psi | 90% | 2598 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,810 psi | 59% | 1631 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,824 psi | 89% | 2631 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 53,084 psi | 88% | 2703 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 52,460 psi | 87% | 2733 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 52,997 psi | 88% | 2717 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 53,098 psi | 88% | 2749 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 84% | 53,867 psi | 89% | 2569 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 53,476 psi | 89% | 2589 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 52,301 psi | 87% | 2625 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 52,620 psi | 87% | 2608 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,867 psi | 89% | 2631 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,027 psi | 90% | 2618 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 51,242 psi | 85% | 2575 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 51,227 psi | 85% | 2615 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,896 psi | 90% | 2680 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 51,851 psi | 86% | 2595 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 53,011 psi | 88% | 2621 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 51,198 psi | 85% | 2487 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 51,576 psi | 86% | 2490 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,867 psi | 89% | 2585 fps | 98.3% |
| Somchem S321 | <<locked>> | 82% | 54,346 psi | 90% | 2625 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,896 psi | 90% | 2530 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 51,561 psi | 86% | 2589 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 52,823 psi | 88% | 2625 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,589 psi | 84% | 2687 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 46,978 psi | 78% | 2579 fps | 96.6% |
| Vihtavuori N133 | <<locked>> | 84% | 51,576 psi | 86% | 2474 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 53,258 psi | 88% | 2552 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,099 psi | 90% | 2572 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,070 psi | 90% | 2602 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 51,982 psi | 86% | 2638 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 84% | 53,693 psi | 89% | 2595 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 52,243 psi | 87% | 2569 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,244 psi | 90% | 2690 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,757 psi | 71% | 2575 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 51,909 psi | 86% | 2615 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 53,853 psi | 89% | 2641 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 52,953 psi | 88% | 2697 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,766 psi | 58% | 2516 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 86% | 52,460 psi | 87% | 2625 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% | 48,573 psi | 81% | 2454 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,075 psi | 68% | 2388 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,428 psi | 80% | 2533 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 43,511 psi | 72% | 2421 fps | 95.4% |
| Accurate 3100 | <<locked>> | 96% | 35,404 psi | 59% | 2375 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 38,885 psi | 65% | 2388 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 30,342 psi | 50% | 2274 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 44,962 psi | 75% | 2497 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 38,174 psi | 63% | 2359 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,123 psi | 78% | 2503 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 47,558 psi | 79% | 2484 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,017 psi | 68% | 2536 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,652 psi | 63% | 2379 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,640 psi | 68% | 2441 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 31,154 psi | 52% | 2290 fps | 95.4% |
| Alliant Reloder-17 | 35 gr | 80% | 32,474 psi | 54% | 2356 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 28,427 psi | 47% | 2251 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 92% | 32,880 psi | 55% | 2421 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,150 psi | 73% | 2503 fps | 99% |
| Bofors RP3 | <<locked>> | 80% | 37,130 psi | 62% | 2382 fps | 99.2% |
| Bofors RP7 | <<locked>> | 88% | 43,395 psi | 72% | 2454 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,892 psi | 81% | 2490 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,992 psi | 76% | 2526 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,159 psi | 63% | 2388 fps | 97.2% |
| Hodgdon H414 | <<locked>> | 88% | 40,538 psi | 67% | 2487 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 88% | 44,266 psi | 74% | 2507 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 45,426 psi | 75% | 2510 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,716 psi | 44% | 2149 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,495 psi | 69% | 2487 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 90% | 42,902 psi | 71% | 2552 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,208 psi | 44% | 1417 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,656 psi | 73% | 2464 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 45,339 psi | 75% | 2500 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,089 psi | 67% | 2392 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,554 psi | 71% | 2411 fps | 96% |
| IMR 4350 | <<locked>> | 90% | 40,944 psi | 68% | 2434 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 84% | 40,001 psi | 66% | 2392 fps | 95.2% |
| IMR 4831 | <<locked>> | 84% | 31,749 psi | 53% | 2290 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 41,655 psi | 69% | 2467 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 80% | 47,123 psi | 78% | 2503 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,019 psi | 73% | 2477 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,063 psi | 75% | 2441 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 40,001 psi | 66% | 2395 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 34,867 psi | 58% | 2293 fps | 95.2% |
| Lovex S070 | <<locked>> | 88% | 39,798 psi | 66% | 2415 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 43,990 psi | 73% | 2454 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 44,179 psi | 73% | 2454 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,987 psi | 66% | 2428 fps | 99.1% |
| Norma 204 | <<locked>> | 94% | 46,586 psi | 77% | 2572 fps | 95.1% |
| Norma MRP | <<locked>> | 98% | 40,886 psi | 68% | 2566 fps | 95.4% |
| Norma URP | <<locked>> | 82% | 30,951 psi | 51% | 2277 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 39,697 psi | 66% | 2444 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 36,970 psi | 61% | 2421 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 46,934 psi | 78% | 2513 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,615 psi | 77% | 2533 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,604 psi | 84% | 2549 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,774 psi | 44% | 1457 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,551 psi | 64% | 2372 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,989 psi | 71% | 2539 fps | 99.2% |
| ReloadSwiss RS 60 | 35 gr | 80% | 34,621 psi | 58% | 2415 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 32,460 psi | 54% | 2343 fps | 95.6% |
| ReloadSwiss RS 70 | 38.2 gr | 86% | 34,998 psi | 58% | 2405 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 47,674 psi | 79% | 2480 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,756 psi | 69% | 2408 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 34,969 psi | 58% | 2329 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 88% | 43,395 psi | 72% | 2454 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 82% | 34,867 psi | 58% | 2293 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,019 psi | 73% | 2477 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,001 psi | 66% | 2395 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 39,798 psi | 66% | 2415 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,245 psi | 60% | 2382 fps | 98.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,107 psi | 75% | 2490 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,526 psi | 72% | 2474 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,440 psi | 75% | 2405 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,797 psi | 63% | 2283 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 38,943 psi | 65% | 2343 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 50,821 psi | 84% | 2575 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,020 psi | 75% | 2405 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,904 psi | 75% | 2487 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 36,056 psi | 60% | 2339 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 25,918 psi | 43% | 2182 fps | 96.5% |
| Somchem S385 | <<locked>> | 96% | 41,075 psi | 68% | 2474 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 45,905 psi | 76% | 2395 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,437 psi | 69% | 2388 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,901 psi | 70% | 2395 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,127 psi | 57% | 2277 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 82% | 32,430 psi | 54% | 2283 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 46,978 psi | 78% | 2497 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 40,321 psi | 67% | 2388 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 31,981 psi | 53% | 2287 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 88% | 28,601 psi | 48% | 2270 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,168 psi | 50% | 2211 fps | 97% |
| Winchester 748 | <<locked>> | 80% | 46,760 psi | 78% | 2539 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 40,538 psi | 67% | 2487 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 92% | 26,658 psi | 44% | 2267 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,917 psi | 71% | 2477 fps | 99.7% |
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 115 powders for .260 Rem. loaded with the .264 | 140gr | Hornady ECX. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,759 fps; across all powders the maximum-charge window runs from 1,594 fps to 2,759 fps. Accurate 3100 gives the best case fill at 100 %, and 115 of the 115 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 140.0 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, ADI AR 2213 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 Reloder-17, ReloadSwiss RS 60, ReloadSwiss RS 70 rank at the top here: for .260 Rem. with the .264 | 140gr | Hornady ECX they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2213, Alliant Reloder-22, Alliant Reloder-25 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.