Load Specifications
Load data in caliber .260 Rem. with .264 | 122gr | 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 Reloder-17, ReloadSwiss RS 60 and Alliant Power Pro 2000-MR.
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% | 51,300 psi | 85% | 2687 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 52,953 psi | 88% | 2759 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 52,620 psi | 87% | 2753 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 51,401 psi | 85% | 2772 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 52,881 psi | 88% | 2749 fps | 96.1% |
| Accurate 4064 | <<locked>> | 92% | 52,460 psi | 87% | 2795 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,083 psi | 87% | 2867 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 88% | 53,795 psi | 89% | 2831 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 51,706 psi | 86% | 2782 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,214 psi | 88% | 2789 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 53,664 psi | 89% | 2766 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,330 psi | 89% | 2946 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 51,184 psi | 85% | 2802 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,302 psi | 90% | 2736 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 51,895 psi | 86% | 2822 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,792 psi | 84% | 2877 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 96% | 51,634 psi | 86% | 2913 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,824 psi | 60% | 2602 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,813 psi | 66% | 2746 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,635 psi | 89% | 2844 fps | 99.4% |
| Bofors RP3 | <<locked>> | 92% | 51,430 psi | 85% | 2812 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 51,996 psi | 86% | 2779 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 84% | 51,953 psi | 86% | 2726 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 52,112 psi | 87% | 2815 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,186 psi | 90% | 2913 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 82% | 53,693 psi | 89% | 2782 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 52,620 psi | 87% | 2825 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 98% | 52,141 psi | 87% | 2871 fps | 97% |
| Hodgdon H4350 | <<locked>> | 96% | 52,982 psi | 88% | 2831 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 88% | 54,317 psi | 90% | 2841 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,789 psi | 78% | 2753 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 53,476 psi | 89% | 2874 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 53,156 psi | 88% | 2907 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,128 psi | 58% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 52,417 psi | 87% | 2795 fps | 99.9% |
| IMR 3031 | <<locked>> | 88% | 54,360 psi | 90% | 2831 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 51,329 psi | 85% | 2766 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 88% | 51,401 psi | 85% | 2740 fps | 96.7% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,286 psi | 87% | 2805 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,259 psi | 90% | 2815 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,342 psi | 82% | 2808 fps | 98.9% |
| IMR 4895 | <<locked>> | 90% | 53,214 psi | 88% | 2854 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 53,214 psi | 88% | 2789 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 52,837 psi | 88% | 2769 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,258 psi | 88% | 2808 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,867 psi | 89% | 2762 fps | 99.8% |
| Lovex S062 | <<locked>> | 92% | 54,041 psi | 90% | 2812 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 52,997 psi | 88% | 2802 fps | 98.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,070 psi | 90% | 2841 fps | 97.5% |
| Norma 201 | <<locked>> | 88% | 52,518 psi | 87% | 2779 fps | 100% |
| Norma 202 | <<locked>> | 88% | 53,055 psi | 88% | 2782 fps | 100% |
| Norma 203B | <<locked>> | 90% | 51,082 psi | 85% | 2808 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 51,822 psi | 86% | 2864 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 90% | 51,329 psi | 85% | 2831 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,502 psi | 84% | 2851 fps | 97.5% |
| Ramshot TAC | <<locked>> | 86% | 53,563 psi | 89% | 2802 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 52,808 psi | 88% | 2818 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,273 psi | 90% | 2792 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,230 psi | 59% | 1755 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 52,446 psi | 87% | 2766 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 53,403 psi | 89% | 2808 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 52,083 psi | 87% | 2884 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 51,488 psi | 86% | 2917 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,924 psi | 86% | 2894 fps | 99% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,141 psi | 87% | 2917 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 86% | 53,374 psi | 89% | 2762 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 52,968 psi | 88% | 2776 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 51,300 psi | 85% | 2805 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 96% | 51,996 psi | 86% | 2779 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 98% | 52,997 psi | 88% | 2802 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,258 psi | 88% | 2808 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,041 psi | 90% | 2812 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,070 psi | 90% | 2841 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,476 psi | 89% | 2871 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 51,605 psi | 86% | 2779 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 52,489 psi | 87% | 2805 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 51,401 psi | 85% | 2680 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,418 psi | 90% | 2720 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 53,432 psi | 89% | 2756 fps | 97.1% |
| Somchem S321 | <<locked>> | 84% | 54,331 psi | 90% | 2822 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 53,606 psi | 89% | 2720 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 51,256 psi | 85% | 2772 fps | 99.6% |
| Somchem S355 | <<locked>> | 94% | 51,721 psi | 86% | 2802 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,035 psi | 76% | 2812 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 54,128 psi | 90% | 2687 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 51,619 psi | 86% | 2667 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 52,634 psi | 87% | 2746 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,780 psi | 89% | 2762 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 53,214 psi | 88% | 2782 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,273 psi | 90% | 2858 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 86% | 53,664 psi | 89% | 2789 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 51,634 psi | 86% | 2756 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,403 psi | 89% | 2864 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,595 psi | 64% | 2674 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 51,561 psi | 86% | 2792 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 53,200 psi | 88% | 2831 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 52,141 psi | 87% | 2871 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 88% | 52,083 psi | 87% | 2812 fps | 99.9% |
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% | 45,382 psi | 75% | 2598 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,472 psi | 82% | 2707 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,347 psi | 62% | 2510 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,817 psi | 74% | 2667 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 49,501 psi | 82% | 2694 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 35,389 psi | 59% | 2500 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 36,492 psi | 61% | 2585 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 41,785 psi | 69% | 2621 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 80% | 35,607 psi | 59% | 2474 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,932 psi | 73% | 2635 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 43,816 psi | 73% | 2628 fps | 100% |
| Alliant Power Pro 2000-MR | 36.8 gr | 80% | 37,666 psi | 63% | 2635 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,751 psi | 58% | 2490 fps | 97.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,082 psi | 85% | 2694 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,550 psi | 62% | 2552 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 34,751 psi | 58% | 2539 fps | 95.1% |
| Alliant Reloder-17 | 37.2 gr | 82% | 32,097 psi | 53% | 2503 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,575 psi | 52% | 2490 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,854 psi | 61% | 2674 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,843 psi | 68% | 2621 fps | 97.3% |
| Bofors RP3 | <<locked>> | 80% | 34,243 psi | 57% | 2490 fps | 97.6% |
| Bofors RP7 | <<locked>> | 94% | 49,008 psi | 81% | 2726 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,919 psi | 76% | 2628 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,221 psi | 70% | 2648 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,818 psi | 78% | 2792 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 80% | 50,111 psi | 83% | 2730 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 37,594 psi | 62% | 2546 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 94% | 45,469 psi | 76% | 2756 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 94% | 49,922 psi | 83% | 2782 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 42,177 psi | 70% | 2635 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,878 psi | 50% | 2388 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,927 psi | 63% | 2598 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 96% | 49,211 psi | 82% | 2838 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,121 psi | 43% | 1535 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,640 psi | 68% | 2589 fps | 98.6% |
| IMR 3031 | <<locked>> | 80% | 41,452 psi | 69% | 2631 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,318 psi | 62% | 2507 fps | 96.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 45,411 psi | 75% | 2635 fps | 95.2% |
| IMR 4350 | <<locked>> | 98% | 48,907 psi | 81% | 2749 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 44,933 psi | 75% | 2654 fps | 95% |
| IMR 4831 | <<locked>> | 90% | 35,288 psi | 59% | 2536 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 38,464 psi | 64% | 2585 fps | 97.8% |
| IMR 8208 XBR | <<locked>> | 80% | 43,932 psi | 73% | 2635 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 49,342 psi | 82% | 2717 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,306 psi | 67% | 2595 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 42,018 psi | 70% | 2559 fps | 98.5% |
| Lovex S062 | <<locked>> | 80% | 36,825 psi | 61% | 2507 fps | 98.5% |
| Lovex S065 | <<locked>> | 90% | 41,568 psi | 69% | 2602 fps | 95.8% |
| Lovex S070 | <<locked>> | 94% | 44,570 psi | 74% | 2677 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 40,654 psi | 68% | 2572 fps | 99.1% |
| Norma 202 | <<locked>> | 80% | 41,017 psi | 68% | 2585 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,912 psi | 61% | 2543 fps | 97.3% |
| Norma URP | <<locked>> | 88% | 34,635 psi | 58% | 2530 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 36,260 psi | 60% | 2549 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 94% | 41,669 psi | 69% | 2687 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 43,816 psi | 73% | 2635 fps | 96.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,960 psi | 71% | 2651 fps | 98.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,413 psi | 79% | 2680 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,295 psi | 44% | 1572 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,414 psi | 82% | 2720 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 43,845 psi | 73% | 2644 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,102 psi | 65% | 2651 fps | 97.4% |
| ReloadSwiss RS 60 | 36.3 gr | 80% | 32,010 psi | 53% | 2513 fps | 98.4% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 36,579 psi | 61% | 2605 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 39,784 psi | 66% | 2674 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 44,324 psi | 74% | 2618 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,609 psi | 64% | 2523 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 80% | 32,024 psi | 53% | 2431 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 94% | 49,008 psi | 81% | 2726 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,568 psi | 69% | 2602 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,306 psi | 67% | 2595 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 36,825 psi | 61% | 2507 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 94% | 44,570 psi | 74% | 2677 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,243 psi | 55% | 2480 fps | 95.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,800 psi | 69% | 2605 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,277 psi | 67% | 2589 fps | 98.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,395 psi | 70% | 2536 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,027 psi | 58% | 2402 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 46,862 psi | 78% | 2651 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 47,239 psi | 78% | 2710 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 41,785 psi | 69% | 2536 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,582 psi | 69% | 2605 fps | 98.3% |
| Somchem S355 | <<locked>> | 80% | 33,040 psi | 55% | 2441 fps | 96.6% |
| Somchem S365 | <<locked>> | 84% | 27,050 psi | 45% | 2365 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 48,051 psi | 80% | 2602 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,699 psi | 71% | 2533 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,072 psi | 63% | 2516 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,856 psi | 65% | 2523 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,430 psi | 52% | 2382 fps | 97.5% |
| Vihtavuori N160 | <<locked>> | 88% | 36,289 psi | 60% | 2533 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 44,019 psi | 73% | 2631 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 37,260 psi | 62% | 2507 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 88% | 35,781 psi | 59% | 2539 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 96% | 33,736 psi | 56% | 2566 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,892 psi | 50% | 2352 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 43,323 psi | 72% | 2671 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 45,469 psi | 76% | 2756 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,755 psi | 66% | 2595 fps | 98.5% |
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 98 powders for .260 Rem. loaded with the .264 | 122gr | Peregrine VLR-5. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,946 fps; across all powders the maximum-charge window runs from 1,719 fps to 2,946 fps. Accurate 4350 gives the best case fill at 100 %, and 98 of the 98 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 122.0 gr projectile in 0.264" calls for a 1:8.5 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 Reloder-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for .260 Rem. with the .264 | 122gr | Peregrine VLR-5 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.