Load Specifications
Load data in caliber .260 Rem. with .264 | 112gr | Hammer HHT bullet and 94 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 Power Pro 2000-MR 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.
A valid access license is required to use the Personalized Load Calculator.
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% | 52,228 psi | 87% | 2825 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 53,983 psi | 90% | 2897 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 52,997 psi | 88% | 2884 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 52,214 psi | 87% | 2907 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 53,055 psi | 88% | 2930 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 48,892 psi | 81% | 2933 fps | 98.1% |
| ADI AR 2206H | <<locked>> | 88% | 51,372 psi | 85% | 2913 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 94% | 52,330 psi | 87% | 2907 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 88% | 53,983 psi | 90% | 2920 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 54,288 psi | 90% | 2904 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 52,141 psi | 87% | 2972 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 54,360 psi | 90% | 3081 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 51,924 psi | 86% | 2933 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 82% | 51,880 psi | 86% | 2828 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 52,663 psi | 87% | 2953 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,370 psi | 80% | 2946 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 98% | 52,330 psi | 87% | 3045 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 54,273 psi | 90% | 2812 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 51,256 psi | 85% | 2923 fps | 98.6% |
| Bofors RP3 | <<locked>> | 94% | 52,011 psi | 86% | 2943 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 52,895 psi | 88% | 2861 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 52,750 psi | 88% | 2946 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 51,155 psi | 85% | 2986 fps | 99% |
| Hodgdon H322 | <<locked>> | 82% | 51,039 psi | 85% | 2867 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 52,373 psi | 87% | 2897 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 53,708 psi | 89% | 2956 fps | 98.4% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 52,388 psi | 87% | 2989 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 88% | 51,808 psi | 86% | 2923 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,382 psi | 74% | 2822 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 54,418 psi | 90% | 3009 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,621 psi | 58% | 1791 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 53,476 psi | 89% | 2930 fps | 99.7% |
| IMR 3031 | <<locked>> | 88% | 51,227 psi | 85% | 2913 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 51,996 psi | 86% | 2894 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 90% | 52,533 psi | 87% | 2867 fps | 96% |
| IMR 4198 | <<locked>> | 82% | 52,750 psi | 88% | 2799 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 51,692 psi | 86% | 2884 fps | 95.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,572 psi | 77% | 2874 fps | 97.8% |
| IMR 4895 | <<locked>> | 92% | 54,012 psi | 90% | 2986 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 88% | 53,983 psi | 90% | 2920 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 54,143 psi | 90% | 2907 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 53,998 psi | 90% | 2943 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 51,750 psi | 86% | 2848 fps | 99.3% |
| Lovex S062 | <<locked>> | 92% | 51,445 psi | 85% | 2890 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 53,650 psi | 89% | 2927 fps | 97.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 51,053 psi | 85% | 2904 fps | 96% |
| Norma 201 | <<locked>> | 90% | 53,214 psi | 88% | 2907 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 54,099 psi | 90% | 2923 fps | 100% |
| Norma 203B | <<locked>> | 92% | 51,837 psi | 86% | 2940 fps | 99.4% |
| Norma URPᴾ | <<locked>> | 100% | 48,602 psi | 81% | 2927 fps | 98% |
| Ramshot Big Game | <<locked>> | 92% | 52,112 psi | 87% | 2963 fps | 99.3% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 47,805 psi | 79% | 2913 fps | 96% |
| Ramshot TAC | <<locked>> | 86% | 51,068 psi | 85% | 2877 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 88% | 53,911 psi | 90% | 2956 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 84% | 51,924 psi | 86% | 2871 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,983 psi | 58% | 1834 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 53,708 psi | 89% | 2907 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,114 psi | 90% | 2933 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 52,649 psi | 87% | 3018 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 52,301 psi | 87% | 3051 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 48,718 psi | 81% | 2956 fps | 97.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,719 psi | 83% | 2982 fps | 97.4% |
| Rottweil R 901 | <<locked>> | 88% | 54,230 psi | 90% | 2897 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 53,621 psi | 89% | 2907 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 51,866 psi | 86% | 2933 fps | 99.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 53,650 psi | 89% | 2927 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 90% | 53,998 psi | 90% | 2943 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 51,445 psi | 85% | 2890 fps | 99.8% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 51,053 psi | 85% | 2904 fps | 96% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 53,200 psi | 88% | 2871 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 53,896 psi | 90% | 2999 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 53,026 psi | 88% | 2854 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 52,359 psi | 87% | 2904 fps | 98.1% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 53,301 psi | 89% | 2936 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 52,083 psi | 87% | 2808 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 51,982 psi | 86% | 2808 fps | 100% |
| Somchem S321 | <<locked>> | 84% | 51,735 psi | 86% | 2904 fps | 99.9% |
| Somchem S335 | <<locked>> | 90% | 54,375 psi | 90% | 2851 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 52,315 psi | 87% | 2904 fps | 99.3% |
| Somchem S355 | <<locked>> | 96% | 52,373 psi | 87% | 2930 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,439 psi | 72% | 2874 fps | 99.6% |
| Vihtavuori N130 | <<locked>> | 84% | 52,214 psi | 87% | 2782 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 52,199 psi | 87% | 2799 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 53,185 psi | 88% | 2881 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 54,346 psi | 90% | 2894 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 54,317 psi | 90% | 2920 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,343 psi | 85% | 2930 fps | 98.3% |
| Vihtavuori N530 | <<locked>> | 88% | 54,418 psi | 90% | 2920 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 52,808 psi | 88% | 2894 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,502 psi | 84% | 2936 fps | 98.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,301 psi | 87% | 2917 fps | 99.7% |
| Winchester 748 | <<locked>> | 88% | 53,940 psi | 90% | 2966 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 52,794 psi | 88% | 2995 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 90% | 53,171 psi | 88% | 2946 fps | 99.7% |
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% | 43,236 psi | 72% | 2684 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,195 psi | 78% | 2792 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,157 psi | 58% | 2579 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,221 psi | 70% | 2736 fps | 99.7% |
| Accurate 4064 | <<locked>> | 80% | 33,272 psi | 55% | 2559 fps | 99.1% |
| Accurate 4350 | <<locked>> | 94% | 39,508 psi | 66% | 2756 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 39,726 psi | 66% | 2687 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 82% | 35,984 psi | 60% | 2585 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,843 psi | 70% | 2707 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 80% | 41,365 psi | 69% | 2710 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 48,675 psi | 81% | 2913 fps | 99.3% |
| Alliant Power Pro 2000-MR | 38.4 gr | 82% | 38,363 psi | 64% | 2756 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,837 psi | 55% | 2546 fps | 96% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,863 psi | 81% | 2785 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,563 psi | 59% | 2612 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 92% | 37,478 psi | 62% | 2710 fps | 95% |
| Alliant Reloder-17 | 38.8 gr | 84% | 32,605 psi | 54% | 2615 fps | 95% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,039 psi | 85% | 2766 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,841 psi | 65% | 2687 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 32,155 psi | 53% | 2543 fps | 95.9% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,918 psi | 73% | 2707 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,118 psi | 67% | 2720 fps | 98.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,309 psi | 74% | 2861 fps | 97.8% |
| Hodgdon H322 | <<locked>> | 80% | 48,051 psi | 80% | 2818 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 48,675 psi | 81% | 2838 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 40,988 psi | 68% | 2726 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 98% | 48,965 psi | 81% | 2930 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 40,045 psi | 67% | 2700 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 34,272 psi | 57% | 2602 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,056 psi | 60% | 2661 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,831 psi | 43% | 1604 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,638 psi | 64% | 2654 fps | 97.4% |
| IMR 3031 | <<locked>> | 80% | 39,131 psi | 65% | 2707 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,534 psi | 59% | 2569 fps | 95.4% |
| IMR 4166 Enduron | <<locked>> | 88% | 49,240 psi | 82% | 2812 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 49,661 psi | 83% | 2753 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 48,820 psi | 81% | 2835 fps | 95% |
| IMR 4831 | <<locked>> | 94% | 38,087 psi | 63% | 2707 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 36,376 psi | 60% | 2644 fps | 96.3% |
| IMR 8208 XBR | <<locked>> | 80% | 41,843 psi | 70% | 2707 fps | 98.7% |
| Lovex D073.5 | <<locked>> | 80% | 47,036 psi | 78% | 2795 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 38,261 psi | 64% | 2667 fps | 99.3% |
| Lovex S060 | <<locked>> | 80% | 40,205 psi | 67% | 2631 fps | 97.4% |
| Lovex S062 | <<locked>> | 80% | 34,925 psi | 58% | 2569 fps | 97.2% |
| Lovex S065 | <<locked>> | 94% | 44,715 psi | 74% | 2769 fps | 95.7% |
| Lovex S070 | <<locked>> | 98% | 48,138 psi | 80% | 2851 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 38,667 psi | 64% | 2641 fps | 98.2% |
| Norma 202 | <<locked>> | 80% | 38,957 psi | 65% | 2657 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 34,911 psi | 58% | 2602 fps | 95.7% |
| Norma URP | <<locked>> | 94% | 39,871 psi | 66% | 2756 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 34,461 psi | 57% | 2608 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 98% | 44,759 psi | 74% | 2854 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 41,887 psi | 70% | 2703 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,959 psi | 68% | 2720 fps | 97.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,440 psi | 75% | 2759 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,933 psi | 43% | 1640 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,079 psi | 78% | 2799 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 47,500 psi | 79% | 2822 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 36,724 psi | 61% | 2707 fps | 95.7% |
| ReloadSwiss RS 60 | 36.9 gr | 80% | 30,240 psi | 50% | 2556 fps | 96.6% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 39,334 psi | 65% | 2772 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 43,221 psi | 72% | 2851 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 42,279 psi | 70% | 2694 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 36,738 psi | 61% | 2589 fps | 97.7% |
| Rottweil R 903 | <<locked>> | 82% | 32,329 psi | 54% | 2539 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 94% | 44,715 psi | 74% | 2769 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,261 psi | 64% | 2667 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 34,925 psi | 58% | 2569 fps | 97.2% |
| Shooters World SW4350 | <<locked>> | 98% | 48,138 psi | 80% | 2851 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,777 psi | 83% | 2815 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 33,808 psi | 56% | 2598 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,864 psi | 83% | 2808 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,769 psi | 66% | 2667 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,189 psi | 63% | 2651 fps | 96.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,538 psi | 67% | 2615 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,330 psi | 55% | 2470 fps | 99.4% |
| Somchem S321 | <<locked>> | 80% | 45,078 psi | 75% | 2785 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 39,842 psi | 66% | 2612 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 39,537 psi | 66% | 2671 fps | 97.1% |
| Somchem S355 | <<locked>> | 82% | 33,431 psi | 56% | 2552 fps | 95.8% |
| Somchem S365 | <<locked>> | 88% | 29,095 psi | 48% | 2523 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 46,006 psi | 76% | 2690 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,785 psi | 68% | 2615 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,013 psi | 60% | 2589 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,854 psi | 61% | 2592 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 29,660 psi | 49% | 2434 fps | 95.9% |
| Vihtavuori N160 | <<locked>> | 92% | 39,349 psi | 65% | 2707 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 41,800 psi | 69% | 2703 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 80% | 35,549 psi | 59% | 2579 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 92% | 38,638 psi | 64% | 2707 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 32,590 psi | 54% | 2516 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 40,799 psi | 68% | 2740 fps | 99.2% |
| Winchester 760 | <<locked>> | 98% | 49,356 psi | 82% | 2936 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,507 psi | 62% | 2654 fps | 97.2% |
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 94 powders for .260 Rem. loaded with the .264 | 112gr | Hammer HHT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,081 fps; across all powders the maximum-charge window runs from 1,791 fps to 3,081 fps. Accurate 4350 gives the best case fill at 100 %, and 94 of the 94 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 112.0 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, Hodgdon H414 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 Power Pro 2000-MR, Alliant Reloder-17 rank at the top here: for .260 Rem. with the .264 | 112gr | Hammer HHT 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.