Load Specifications
Load data in caliber .260 Rem. with .264 | 128gr | Peregrine VLR-5 bullet and 98 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% | 52,518 psi | 87% | 2635 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,375 psi | 90% | 2707 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,867 psi | 89% | 2697 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 52,591 psi | 87% | 2720 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,041 psi | 90% | 2703 fps | 96.8% |
| Accurate 4064 | <<locked>> | 92% | 53,780 psi | 89% | 2743 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,780 psi | 89% | 2825 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 86% | 51,677 psi | 86% | 2730 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 52,736 psi | 88% | 2730 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,186 psi | 90% | 2733 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 51,314 psi | 85% | 2664 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 51,053 psi | 85% | 2838 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 52,388 psi | 87% | 2749 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,055 psi | 88% | 2772 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,141 psi | 87% | 2831 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 96% | 53,185 psi | 88% | 2871 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,840 psi | 61% | 2569 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,886 psi | 68% | 2717 fps | 97.2% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 51,372 psi | 85% | 2743 fps | 99.4% |
| Bofors RP3 | <<locked>> | 92% | 52,779 psi | 88% | 2766 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 53,185 psi | 88% | 2733 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 52,692 psi | 88% | 2671 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,301 psi | 89% | 2762 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 51,808 psi | 86% | 2805 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 92% | 53,896 psi | 90% | 2776 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 98% | 53,301 psi | 89% | 2825 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 96% | 54,288 psi | 90% | 2789 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 86% | 52,156 psi | 87% | 2740 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,167 psi | 80% | 2710 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 51,213 psi | 85% | 2769 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 54,462 psi | 90% | 2864 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,998 psi | 58% | 1670 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,795 psi | 89% | 2749 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 52,098 psi | 87% | 2726 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 52,315 psi | 87% | 2713 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 52,315 psi | 87% | 2690 fps | 97.3% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,679 psi | 89% | 2762 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 94% | 52,301 psi | 87% | 2720 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,879 psi | 85% | 2766 fps | 99.3% |
| IMR 4895 | <<locked>> | 90% | 54,404 psi | 90% | 2802 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 54,186 psi | 90% | 2733 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,273 psi | 90% | 2720 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 50,879 psi | 85% | 2703 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 51,605 psi | 86% | 2664 fps | 99.8% |
| Lovex S062 | <<locked>> | 90% | 51,953 psi | 86% | 2710 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,288 psi | 90% | 2756 fps | 98.8% |
| Lovex S070 | <<locked>> | 98% | 51,866 psi | 86% | 2740 fps | 97.5% |
| Norma 201 | <<locked>> | 88% | 53,882 psi | 90% | 2730 fps | 100% |
| Norma 202 | <<locked>> | 86% | 50,923 psi | 85% | 2680 fps | 100% |
| Norma 203B | <<locked>> | 90% | 52,228 psi | 87% | 2759 fps | 99.9% |
| Norma 204ᴾ | <<locked>> | 100% | 54,259 psi | 90% | 2808 fps | 95.8% |
| Norma URPᴾ | <<locked>> | 100% | 52,939 psi | 88% | 2812 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 90% | 52,707 psi | 88% | 2785 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,069 psi | 87% | 2812 fps | 98.2% |
| Ramshot TAC | <<locked>> | 84% | 51,198 psi | 85% | 2700 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,954 psi | 90% | 2769 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 51,851 psi | 86% | 2687 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,462 psi | 59% | 1709 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,722 psi | 89% | 2713 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 51,198 psi | 85% | 2710 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 53,432 psi | 89% | 2835 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 52,953 psi | 88% | 2871 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,403 psi | 89% | 2848 fps | 99.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,795 psi | 89% | 2881 fps | 99.3% |
| Rottweil R 901 | <<locked>> | 84% | 51,416 psi | 85% | 2664 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,375 psi | 90% | 2726 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 52,649 psi | 87% | 2756 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 53,185 psi | 88% | 2733 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,288 psi | 90% | 2756 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 86% | 50,879 psi | 85% | 2703 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 51,953 psi | 86% | 2710 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 51,866 psi | 86% | 2740 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 51,300 psi | 85% | 2769 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 52,794 psi | 88% | 2730 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,577 psi | 89% | 2756 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 52,127 psi | 87% | 2621 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 52,141 psi | 87% | 2621 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 51,503 psi | 86% | 2664 fps | 97.1% |
| Somchem S321 | <<locked>> | 82% | 51,909 psi | 86% | 2717 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 51,416 psi | 85% | 2621 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 52,417 psi | 87% | 2723 fps | 99.8% |
| Somchem S355 | <<locked>> | 94% | 53,330 psi | 89% | 2759 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,514 psi | 79% | 2766 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 52,040 psi | 86% | 2589 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 52,431 psi | 87% | 2612 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 53,693 psi | 89% | 2687 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 51,648 psi | 86% | 2664 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 51,242 psi | 85% | 2687 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 52,069 psi | 87% | 2759 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 84% | 51,430 psi | 85% | 2687 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 53,185 psi | 88% | 2707 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 50,966 psi | 85% | 2762 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,958 psi | 66% | 2641 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 52,707 psi | 88% | 2746 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 54,404 psi | 90% | 2779 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,708 psi | 89% | 2828 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,750 psi | 54% | 2552 fps | 97.6% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,301 psi | 89% | 2759 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% | 46,383 psi | 77% | 2549 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,763 psi | 84% | 2657 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,464 psi | 64% | 2464 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,730 psi | 76% | 2618 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,239 psi | 78% | 2595 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 36,390 psi | 60% | 2457 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 32,590 psi | 54% | 2434 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 42,815 psi | 71% | 2579 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 36,419 psi | 61% | 2431 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,962 psi | 75% | 2589 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 45,034 psi | 75% | 2575 fps | 100% |
| Alliant Power Pro 2000-MR | 36.3 gr | 80% | 38,754 psi | 64% | 2602 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,679 psi | 59% | 2448 fps | 98.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,522 psi | 64% | 2513 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,634 psi | 56% | 2457 fps | 95.3% |
| Alliant Reloder-17 | 35.7 gr | 80% | 30,618 psi | 51% | 2408 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,574 psi | 51% | 2408 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 35,302 psi | 59% | 2582 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,047 psi | 70% | 2582 fps | 98% |
| Bofors RP3 | <<locked>> | 80% | 34,969 psi | 58% | 2448 fps | 98.2% |
| Bofors RP7 | <<locked>> | 92% | 47,137 psi | 78% | 2631 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,862 psi | 78% | 2579 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,424 psi | 72% | 2605 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,921 psi | 80% | 2743 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 80% | 36,071 psi | 60% | 2451 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 92% | 43,627 psi | 72% | 2657 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 92% | 47,805 psi | 79% | 2680 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 43,178 psi | 72% | 2589 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 28,645 psi | 48% | 2300 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,073 psi | 65% | 2559 fps | 99% |
| Hodgdon Superformance | <<locked>> | 94% | 47,021 psi | 78% | 2740 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,165 psi | 43% | 1493 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,611 psi | 69% | 2546 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 42,569 psi | 71% | 2582 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,218 psi | 63% | 2464 fps | 97.6% |
| IMR 4166 Enduron | <<locked>> | 82% | 43,497 psi | 72% | 2539 fps | 95.3% |
| IMR 4350 | <<locked>> | 96% | 47,253 psi | 79% | 2657 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 43,163 psi | 72% | 2562 fps | 95% |
| IMR 4831 | <<locked>> | 88% | 34,011 psi | 57% | 2448 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 39,450 psi | 66% | 2543 fps | 98.4% |
| IMR 8208 XBR | <<locked>> | 80% | 44,962 psi | 75% | 2589 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 50,314 psi | 84% | 2664 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,495 psi | 69% | 2552 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,859 psi | 71% | 2516 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 37,710 psi | 63% | 2464 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 37,318 psi | 62% | 2454 fps | 95% |
| Lovex S070 | <<locked>> | 92% | 42,975 psi | 71% | 2589 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 41,597 psi | 69% | 2526 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 42,018 psi | 70% | 2539 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,898 psi | 63% | 2503 fps | 98% |
| Norma 204 | <<locked>> | 98% | 50,575 psi | 84% | 2749 fps | 95% |
| Norma URP | <<locked>> | 86% | 33,315 psi | 55% | 2441 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 37,333 psi | 62% | 2510 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 39,987 psi | 66% | 2592 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 44,628 psi | 74% | 2589 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,121 psi | 73% | 2608 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,559 psi | 81% | 2635 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,368 psi | 44% | 1529 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,212 psi | 83% | 2664 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,829 psi | 69% | 2546 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,321 psi | 67% | 2608 fps | 98.1% |
| ReloadSwiss RS 60 | 35.7 gr | 80% | 32,692 psi | 54% | 2474 fps | 99% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,128 psi | 58% | 2513 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,913 psi | 63% | 2575 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 45,571 psi | 76% | 2572 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,479 psi | 66% | 2477 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 32,953 psi | 55% | 2392 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 92% | 47,137 psi | 78% | 2631 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 37,318 psi | 62% | 2454 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,495 psi | 69% | 2552 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,710 psi | 63% | 2464 fps | 99% |
| Shooters World SW4350 | <<locked>> | 92% | 42,975 psi | 71% | 2589 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,171 psi | 57% | 2444 fps | 96.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,641 psi | 71% | 2559 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,321 psi | 69% | 2549 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,236 psi | 72% | 2487 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,795 psi | 59% | 2359 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 45,063 psi | 75% | 2559 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 48,559 psi | 81% | 2664 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,685 psi | 71% | 2487 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,786 psi | 71% | 2566 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 33,895 psi | 56% | 2402 fps | 97.4% |
| Somchem S365 | <<locked>> | 82% | 26,005 psi | 43% | 2280 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 48,950 psi | 81% | 2546 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,569 psi | 72% | 2484 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,044 psi | 65% | 2467 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,827 psi | 66% | 2477 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,285 psi | 54% | 2343 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 34,911 psi | 58% | 2444 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 44,715 psi | 74% | 2579 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,247 psi | 64% | 2464 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 34,272 psi | 57% | 2444 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 94% | 32,445 psi | 54% | 2474 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,790 psi | 48% | 2267 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 44,527 psi | 74% | 2628 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 43,627 psi | 72% | 2657 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,618 psi | 51% | 2484 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,567 psi | 67% | 2549 fps | 99% |
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 114 powders for .260 Rem. loaded with the .264 | 128gr | Peregrine VLR-5. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,881 fps; across all powders the maximum-charge window runs from 1,670 fps to 2,881 fps. Accurate 3100 gives the best case fill at 100 %, and 114 of the 114 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 128.0 gr projectile in 0.264" calls for a 1:8.0 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .260 Rem. with the .264 | 128gr | Peregrine VLR-5 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.