Load Specifications
Load data in caliber .260 Rem. with .264 | 120gr | CutEdge MTH bullet and 96 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 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>> | 86% | 54,462 psi | 90% | 2756 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 52,808 psi | 88% | 2782 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 52,431 psi | 87% | 2779 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 51,256 psi | 85% | 2795 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 52,620 psi | 87% | 2769 fps | 95.9% |
| Accurate 4064 | <<locked>> | 92% | 52,243 psi | 87% | 2818 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,069 psi | 87% | 2894 fps | 99.1% |
| ADI AR 2206H | <<locked>> | 88% | 53,650 psi | 89% | 2854 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 51,561 psi | 86% | 2805 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,084 psi | 88% | 2812 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 53,127 psi | 88% | 2785 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,432 psi | 89% | 2972 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 51,010 psi | 85% | 2822 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,302 psi | 90% | 2762 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 51,663 psi | 86% | 2844 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,836 psi | 84% | 2904 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 96% | 51,634 psi | 86% | 2940 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,578 psi | 59% | 2615 fps | 97.1% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,751 psi | 89% | 2871 fps | 99.3% |
| Bofors RP3 | <<locked>> | 92% | 51,198 psi | 85% | 2835 fps | 99.9% |
| Bofors RP7 | <<locked>> | 96% | 52,112 psi | 87% | 2805 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 51,488 psi | 86% | 2746 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 51,880 psi | 86% | 2838 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 53,896 psi | 90% | 2933 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 82% | 53,650 psi | 89% | 2808 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 52,736 psi | 88% | 2851 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 98% | 51,735 psi | 86% | 2887 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 88% | 54,143 psi | 90% | 2867 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,862 psi | 78% | 2779 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 53,621 psi | 89% | 2900 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 52,997 psi | 88% | 2927 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,925 psi | 58% | 1732 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 52,243 psi | 87% | 2818 fps | 99.8% |
| IMR 3031 | <<locked>> | 88% | 54,230 psi | 90% | 2854 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,302 psi | 90% | 2838 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 51,242 psi | 85% | 2762 fps | 96.5% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,315 psi | 87% | 2828 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 96% | 53,983 psi | 90% | 2835 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,385 psi | 82% | 2831 fps | 98.8% |
| IMR 4895 | <<locked>> | 90% | 53,040 psi | 88% | 2874 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 53,084 psi | 88% | 2812 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 52,649 psi | 87% | 2792 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,055 psi | 88% | 2831 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,766 psi | 89% | 2789 fps | 99.8% |
| Lovex S062 | <<locked>> | 92% | 53,867 psi | 89% | 2835 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 53,069 psi | 88% | 2828 fps | 98.2% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,708 psi | 89% | 2861 fps | 97.3% |
| Norma 201 | <<locked>> | 88% | 52,388 psi | 87% | 2802 fps | 100% |
| Norma 202 | <<locked>> | 88% | 52,939 psi | 88% | 2808 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,375 psi | 90% | 2884 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 51,445 psi | 85% | 2884 fps | 99% |
| Ramshot Big Game | <<locked>> | 90% | 51,372 psi | 85% | 2858 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,488 psi | 84% | 2874 fps | 97.4% |
| Ramshot TAC | <<locked>> | 86% | 53,301 psi | 89% | 2825 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 52,562 psi | 87% | 2841 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,128 psi | 90% | 2812 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,331 psi | 59% | 1775 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 52,373 psi | 87% | 2792 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 53,127 psi | 88% | 2828 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 51,837 psi | 86% | 2907 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 51,547 psi | 86% | 2946 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,851 psi | 86% | 2917 fps | 98.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,054 psi | 86% | 2940 fps | 98.6% |
| Rottweil R 901 | <<locked>> | 86% | 53,301 psi | 89% | 2785 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 52,823 psi | 88% | 2799 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 51,068 psi | 85% | 2828 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 96% | 52,112 psi | 87% | 2805 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 98% | 53,069 psi | 88% | 2828 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,055 psi | 88% | 2831 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 53,867 psi | 89% | 2835 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,708 psi | 89% | 2861 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,127 psi | 88% | 2890 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 51,401 psi | 85% | 2799 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 52,243 psi | 87% | 2828 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 50,966 psi | 85% | 2700 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,215 psi | 90% | 2743 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 53,519 psi | 89% | 2782 fps | 97% |
| Somchem S321 | <<locked>> | 84% | 54,143 psi | 90% | 2844 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 53,476 psi | 89% | 2743 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 51,010 psi | 85% | 2792 fps | 99.6% |
| Somchem S355 | <<locked>> | 94% | 51,851 psi | 86% | 2828 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,035 psi | 76% | 2835 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 54,114 psi | 90% | 2713 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 51,227 psi | 85% | 2687 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 52,518 psi | 87% | 2769 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,592 psi | 89% | 2785 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 53,301 psi | 89% | 2812 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,259 psi | 90% | 2884 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 86% | 53,534 psi | 89% | 2812 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 51,793 psi | 86% | 2782 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,953 psi | 88% | 2884 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,290 psi | 64% | 2694 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 51,503 psi | 86% | 2815 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 52,968 psi | 88% | 2854 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 52,112 psi | 87% | 2894 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 88% | 51,851 psi | 86% | 2831 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% | 45,078 psi | 75% | 2621 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,400 psi | 82% | 2730 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,347 psi | 62% | 2533 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,672 psi | 74% | 2690 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 49,269 psi | 82% | 2713 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 35,375 psi | 59% | 2520 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 36,332 psi | 60% | 2602 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 41,771 psi | 69% | 2644 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 80% | 35,331 psi | 59% | 2487 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,918 psi | 73% | 2657 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 43,511 psi | 72% | 2648 fps | 100% |
| Alliant Power Pro 2000-MR | 37.2 gr | 80% | 37,579 psi | 62% | 2657 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,737 psi | 58% | 2510 fps | 97.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,155 psi | 85% | 2720 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,536 psi | 62% | 2575 fps | 96.8% |
| Alliant Reloder-16 | <<locked>> | 90% | 37,028 psi | 62% | 2621 fps | 95.9% |
| Alliant Reloder-17 | 37.6 gr | 82% | 32,024 psi | 53% | 2520 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,430 psi | 52% | 2507 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,756 psi | 68% | 2641 fps | 97.1% |
| Bofors RP3 | <<locked>> | 80% | 33,939 psi | 56% | 2503 fps | 97.3% |
| Bofors RP7 | <<locked>> | 94% | 48,762 psi | 81% | 2749 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,571 psi | 76% | 2648 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,134 psi | 70% | 2671 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,644 psi | 77% | 2812 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 80% | 50,125 psi | 83% | 2756 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 37,536 psi | 62% | 2566 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 94% | 45,179 psi | 75% | 2772 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 42,134 psi | 70% | 2657 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 31,676 psi | 53% | 2457 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,869 psi | 63% | 2618 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 96% | 49,110 psi | 82% | 2861 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,020 psi | 43% | 1552 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,321 psi | 67% | 2605 fps | 98.4% |
| IMR 3031 | <<locked>> | 80% | 41,466 psi | 69% | 2657 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,072 psi | 62% | 2523 fps | 96.7% |
| IMR 4166 Enduron | <<locked>> | 84% | 45,339 psi | 75% | 2657 fps | 95.1% |
| IMR 4350 | <<locked>> | 98% | 48,994 psi | 81% | 2776 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 47,776 psi | 79% | 2733 fps | 95.6% |
| IMR 4831 | <<locked>> | 90% | 35,418 psi | 59% | 2562 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 38,435 psi | 64% | 2605 fps | 97.7% |
| IMR 8208 XBR | <<locked>> | 80% | 43,918 psi | 73% | 2657 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 49,211 psi | 82% | 2740 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,263 psi | 67% | 2621 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 42,032 psi | 70% | 2585 fps | 98.4% |
| Lovex S062 | <<locked>> | 80% | 36,811 psi | 61% | 2530 fps | 98.4% |
| Lovex S065 | <<locked>> | 90% | 41,408 psi | 69% | 2621 fps | 95.6% |
| Lovex S070 | <<locked>> | 94% | 44,324 psi | 74% | 2697 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 40,654 psi | 68% | 2595 fps | 99.1% |
| Norma 202 | <<locked>> | 80% | 41,031 psi | 68% | 2612 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,898 psi | 61% | 2562 fps | 97.2% |
| Norma URP | <<locked>> | 90% | 36,970 psi | 61% | 2608 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 36,172 psi | 60% | 2569 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 94% | 41,379 psi | 69% | 2703 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 43,700 psi | 73% | 2657 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,859 psi | 71% | 2674 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,311 psi | 79% | 2703 fps | 99.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,179 psi | 43% | 1585 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,023 psi | 81% | 2740 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 43,656 psi | 73% | 2664 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,001 psi | 65% | 2671 fps | 97.2% |
| ReloadSwiss RS 60 | 36.7 gr | 80% | 31,952 psi | 53% | 2533 fps | 98.3% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 36,376 psi | 60% | 2621 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 39,523 psi | 66% | 2694 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 44,382 psi | 74% | 2641 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,624 psi | 64% | 2546 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 80% | 32,010 psi | 53% | 2451 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 94% | 48,762 psi | 81% | 2749 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,408 psi | 69% | 2621 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,263 psi | 67% | 2621 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 36,811 psi | 61% | 2530 fps | 98.4% |
| Shooters World SW4350 | <<locked>> | 94% | 44,324 psi | 74% | 2697 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,199 psi | 55% | 2500 fps | 95.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,684 psi | 69% | 2625 fps | 96.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,234 psi | 67% | 2612 fps | 98% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,438 psi | 71% | 2562 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,070 psi | 58% | 2428 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 46,963 psi | 78% | 2677 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 47,123 psi | 78% | 2733 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 41,814 psi | 69% | 2559 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,495 psi | 69% | 2628 fps | 98.2% |
| Somchem S355 | <<locked>> | 80% | 33,011 psi | 55% | 2461 fps | 96.5% |
| Somchem S365 | <<locked>> | 84% | 27,006 psi | 45% | 2385 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 48,095 psi | 80% | 2628 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,743 psi | 71% | 2559 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,101 psi | 63% | 2539 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,841 psi | 65% | 2546 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,415 psi | 52% | 2402 fps | 97.4% |
| Vihtavuori N160 | <<locked>> | 88% | 36,201 psi | 60% | 2556 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 43,642 psi | 73% | 2651 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 80% | 37,231 psi | 62% | 2530 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 38,130 psi | 63% | 2615 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 96% | 33,533 psi | 56% | 2582 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,023 psi | 50% | 2375 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 43,192 psi | 72% | 2697 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 45,513 psi | 76% | 2779 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,682 psi | 66% | 2615 fps | 98.4% |
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 96 powders for .260 Rem. loaded with the .264 | 120gr | CutEdge MTH. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,972 fps; across all powders the maximum-charge window runs from 1,732 fps to 2,972 fps. Accurate 4350 gives the best case fill at 100 %, and 96 of the 96 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 120.0 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. ReloadSwiss RS 60, Alliant Reloder-17, Alliant Power Pro 2000-MR rank at the top here: for .260 Rem. with the .264 | 120gr | CutEdge MTH 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.