Load Specifications
Load data in caliber .260 Rem. with .264 | 140gr | Barnes Match Burner BT bullet and 98 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-17 and ReloadSwiss RS 60.
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% | 54,215 psi | 90% | 2533 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 53,447 psi | 89% | 2562 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 52,127 psi | 87% | 2566 fps | 97.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 43,743 psi | 73% | 2533 fps | 97.7% |
| Accurate 4064 | <<locked>> | 88% | 53,417 psi | 89% | 2608 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 53,258 psi | 88% | 2697 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 53,417 psi | 89% | 2635 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 51,155 psi | 85% | 2592 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 51,532 psi | 86% | 2677 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 52,591 psi | 87% | 2589 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 53,432 psi | 89% | 2559 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,026 psi | 88% | 2749 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 51,314 psi | 85% | 2612 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 51,895 psi | 86% | 2635 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 54,099 psi | 90% | 2746 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 51,851 psi | 86% | 2730 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 50,386 psi | 84% | 2664 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,640 psi | 69% | 2562 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 36,724 psi | 61% | 2467 fps | 96.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 46,572 psi | 77% | 2723 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,258 psi | 88% | 2654 fps | 99.9% |
| Bofors RP3 | <<locked>> | 88% | 52,011 psi | 86% | 2631 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 51,793 psi | 86% | 2602 fps | 97.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 53,896 psi | 90% | 2569 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 51,909 psi | 86% | 2618 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 52,750 psi | 88% | 2644 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 94% | 52,446 psi | 87% | 2694 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 92% | 52,968 psi | 88% | 2657 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 84% | 53,954 psi | 90% | 2644 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,172 psi | 90% | 2677 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 53,403 psi | 89% | 2677 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 52,460 psi | 87% | 2726 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,955 psi | 60% | 1611 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 51,779 psi | 86% | 2598 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 54,201 psi | 90% | 2625 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 53,896 psi | 90% | 2621 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 53,563 psi | 89% | 2602 fps | 98.5% |
| IMR 4350 | <<locked>> | 96% | 52,359 psi | 87% | 2635 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 92% | 53,737 psi | 89% | 2635 fps | 98.4% |
| IMR 4831 | <<locked>> | 98% | 53,838 psi | 89% | 2690 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 53,171 psi | 88% | 2661 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 52,591 psi | 87% | 2589 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 53,214 psi | 88% | 2612 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,127 psi | 88% | 2569 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 53,867 psi | 89% | 2618 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 53,069 psi | 88% | 2625 fps | 99.3% |
| Lovex S070 | <<locked>> | 96% | 53,998 psi | 90% | 2661 fps | 98.7% |
| Norma 201 | <<locked>> | 84% | 52,156 psi | 87% | 2582 fps | 100% |
| Norma 202 | <<locked>> | 84% | 52,678 psi | 88% | 2582 fps | 100% |
| Norma 203B | <<locked>> | 88% | 54,201 psi | 90% | 2664 fps | 100% |
| Norma 204 | <<locked>> | 96% | 52,446 psi | 87% | 2674 fps | 96.7% |
| Norma MRPᴾ | <<locked>> | 100% | 46,586 psi | 77% | 2680 fps | 97.3% |
| Norma URP | <<locked>> | 96% | 52,127 psi | 87% | 2684 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 86% | 51,372 psi | 85% | 2644 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 54,360 psi | 90% | 2733 fps | 99.3% |
| Ramshot TAC | <<locked>> | 82% | 52,388 psi | 87% | 2608 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 52,301 psi | 87% | 2625 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,245 psi | 60% | 1644 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 52,953 psi | 88% | 2628 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 52,112 psi | 87% | 2690 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 51,605 psi | 86% | 2726 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 52,576 psi | 87% | 2713 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 52,228 psi | 87% | 2746 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 53,359 psi | 89% | 2566 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,040 psi | 88% | 2589 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 51,837 psi | 86% | 2621 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 49,197 psi | 82% | 2651 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 92% | 51,793 psi | 86% | 2602 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 94% | 53,069 psi | 88% | 2625 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 53,214 psi | 88% | 2612 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 53,867 psi | 89% | 2618 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 53,998 psi | 90% | 2661 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 53,461 psi | 89% | 2680 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 50,865 psi | 85% | 2585 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 51,880 psi | 86% | 2612 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 53,766 psi | 89% | 2526 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 53,925 psi | 90% | 2523 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 53,229 psi | 88% | 2582 fps | 98.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 48,733 psi | 81% | 2644 fps | 96.4% |
| Somchem S335 | <<locked>> | 84% | 52,968 psi | 88% | 2520 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,288 psi | 90% | 2631 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 52,286 psi | 87% | 2621 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,012 psi | 90% | 2736 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,024 psi | 83% | 2631 fps | 97.4% |
| Vihtavuori N133 | <<locked>> | 84% | 54,114 psi | 90% | 2510 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 52,881 psi | 88% | 2549 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 53,432 psi | 89% | 2566 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 53,229 psi | 88% | 2595 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 51,126 psi | 85% | 2631 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 82% | 52,953 psi | 88% | 2589 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 51,547 psi | 86% | 2566 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 53,737 psi | 89% | 2687 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,093 psi | 77% | 2635 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 51,082 psi | 85% | 2608 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 52,794 psi | 88% | 2631 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 52,446 psi | 87% | 2694 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,231 psi | 62% | 2582 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 51,764 psi | 86% | 2618 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% | 51,111 psi | 85% | 2490 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,106 psi | 73% | 2434 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 42,815 psi | 71% | 2415 fps | 95.4% |
| Accurate 3100 | <<locked>> | 94% | 35,578 psi | 59% | 2379 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 41,727 psi | 69% | 2434 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 30,690 psi | 51% | 2277 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 47,166 psi | 78% | 2539 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 40,147 psi | 67% | 2402 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 96% | 45,411 psi | 75% | 2572 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,240 psi | 82% | 2539 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,154 psi | 83% | 2516 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,294 psi | 72% | 2585 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,132 psi | 67% | 2428 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,844 psi | 71% | 2484 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,024 psi | 52% | 2290 fps | 95.5% |
| Alliant Reloder-17 | 36 gr | 80% | 34,621 psi | 58% | 2408 fps | 98.6% |
| Alliant Reloder-19 | <<locked>> | 96% | 44,469 psi | 74% | 2562 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 86% | 27,079 psi | 45% | 2211 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 98% | 34,432 psi | 57% | 2411 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 90% | 32,880 psi | 55% | 2425 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,427 psi | 77% | 2549 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 39,827 psi | 66% | 2431 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 40,654 psi | 68% | 2408 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,894 psi | 85% | 2526 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,559 psi | 81% | 2569 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,640 psi | 68% | 2438 fps | 98% |
| Hodgdon H414 | <<locked>> | 86% | 40,045 psi | 67% | 2480 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 86% | 43,816 psi | 73% | 2503 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 47,659 psi | 79% | 2549 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,558 psi | 47% | 2201 fps | 96.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,656 psi | 73% | 2526 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 42,308 psi | 70% | 2546 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,803 psi | 45% | 1437 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,658 psi | 76% | 2503 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 47,848 psi | 79% | 2536 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,177 psi | 70% | 2434 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,425 psi | 74% | 2451 fps | 96.7% |
| IMR 4350 | <<locked>> | 88% | 40,596 psi | 67% | 2431 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 39,697 psi | 66% | 2388 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 29,936 psi | 50% | 2244 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 43,918 psi | 73% | 2510 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 49,240 psi | 82% | 2539 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,862 psi | 78% | 2523 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,036 psi | 78% | 2477 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 42,279 psi | 70% | 2438 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 34,809 psi | 58% | 2293 fps | 95.4% |
| Lovex S070 | <<locked>> | 86% | 39,784 psi | 66% | 2418 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 46,398 psi | 77% | 2493 fps | 100% |
| Norma 202 | <<locked>> | 80% | 46,818 psi | 78% | 2497 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,221 psi | 70% | 2474 fps | 99.5% |
| Norma 204 | <<locked>> | 92% | 45,847 psi | 76% | 2562 fps | 95.1% |
| Norma MRP | <<locked>> | 96% | 40,669 psi | 68% | 2566 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 31,009 psi | 52% | 2280 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 42,061 psi | 70% | 2493 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 36,869 psi | 61% | 2421 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 49,168 psi | 82% | 2556 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,008 psi | 81% | 2575 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,137 psi | 45% | 1470 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,828 psi | 68% | 2421 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,382 psi | 75% | 2585 fps | 99.6% |
| ReloadSwiss RS 60 | 36 gr | 80% | 36,811 psi | 61% | 2467 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 32,721 psi | 54% | 2349 fps | 95.9% |
| ReloadSwiss RS 70 | 38.4 gr | 84% | 34,853 psi | 58% | 2405 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 50,343 psi | 84% | 2520 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,092 psi | 73% | 2448 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 37,347 psi | 62% | 2379 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 98% | 45,934 psi | 76% | 2592 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 84% | 40,654 psi | 68% | 2408 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,809 psi | 58% | 2293 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,862 psi | 78% | 2523 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,279 psi | 70% | 2438 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 39,784 psi | 66% | 2418 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,290 psi | 64% | 2425 fps | 98.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,572 psi | 79% | 2533 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,556 psi | 76% | 2510 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,297 psi | 79% | 2434 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,523 psi | 66% | 2316 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 38,566 psi | 64% | 2336 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 45,513 psi | 76% | 2589 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 47,210 psi | 78% | 2441 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,239 psi | 78% | 2526 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 38,261 psi | 64% | 2385 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 27,833 psi | 46% | 2238 fps | 97.7% |
| Somchem S385 | <<locked>> | 94% | 41,147 psi | 68% | 2480 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 47,688 psi | 79% | 2425 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,598 psi | 72% | 2421 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,063 psi | 73% | 2434 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,216 psi | 60% | 2320 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 32,387 psi | 54% | 2283 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 80% | 49,501 psi | 82% | 2539 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,699 psi | 71% | 2431 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,024 psi | 53% | 2287 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 86% | 29,167 psi | 48% | 2283 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,024 psi | 53% | 2260 fps | 97.9% |
| Winchester 748 | <<locked>> | 80% | 49,356 psi | 82% | 2582 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 40,350 psi | 67% | 2487 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,108 psi | 45% | 2287 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,339 psi | 75% | 2520 fps | 99.9% |
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 116 powders for .260 Rem. loaded with the .264 | 140gr | Barnes Match Burner BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,749 fps; across all powders the maximum-charge window runs from 1,611 fps to 2,749 fps. Accurate 3100 gives the best case fill at 100 %, and 116 of the 116 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.264" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, 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 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .260 Rem. with the .264 | 140gr | Barnes Match Burner BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Bofors RP15 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.