Load Specifications
Load data in caliber .260 Rem. with .264 | 125gr | Hasler ARIETE 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 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.
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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% | 52,823 psi | 88% | 2661 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 50,879 psi | 85% | 2680 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 52,823 psi | 88% | 2746 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,201 psi | 90% | 2726 fps | 96.5% |
| Accurate 4064 | <<locked>> | 92% | 54,331 psi | 90% | 2776 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,983 psi | 90% | 2851 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 51,837 psi | 86% | 2753 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 92% | 52,779 psi | 88% | 2753 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,244 psi | 90% | 2759 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 51,401 psi | 85% | 2690 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 51,097 psi | 85% | 2861 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 52,460 psi | 87% | 2776 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,156 psi | 88% | 2795 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,750 psi | 86% | 2848 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 96% | 52,765 psi | 88% | 2887 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,912 psi | 61% | 2585 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,901 psi | 68% | 2733 fps | 96.8% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 51,445 psi | 85% | 2766 fps | 99.2% |
| Bofors RP3 | <<locked>> | 92% | 53,055 psi | 88% | 2792 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 53,359 psi | 89% | 2756 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 84% | 52,779 psi | 88% | 2694 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,476 psi | 89% | 2789 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 51,764 psi | 86% | 2828 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 92% | 54,056 psi | 90% | 2802 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 98% | 53,287 psi | 89% | 2844 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 96% | 54,302 psi | 90% | 2808 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 86% | 52,301 psi | 87% | 2766 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,254 psi | 80% | 2733 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 51,256 psi | 85% | 2795 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 54,056 psi | 90% | 2877 fps | 97% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,273 psi | 59% | 1690 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,417 psi | 89% | 2766 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 52,141 psi | 87% | 2753 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 52,402 psi | 87% | 2736 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 88% | 52,417 psi | 87% | 2713 fps | 97% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,287 psi | 89% | 2776 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 94% | 51,953 psi | 86% | 2736 fps | 96.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,966 psi | 85% | 2789 fps | 99.2% |
| IMR 4895 | <<locked>> | 88% | 51,343 psi | 85% | 2779 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 54,244 psi | 90% | 2759 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,259 psi | 90% | 2740 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 51,140 psi | 85% | 2733 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 51,706 psi | 86% | 2687 fps | 99.7% |
| Lovex S062 | <<locked>> | 90% | 52,170 psi | 87% | 2736 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,462 psi | 90% | 2782 fps | 98.6% |
| Lovex S070 | <<locked>> | 98% | 51,735 psi | 86% | 2759 fps | 97.2% |
| Norma 201 | <<locked>> | 88% | 53,795 psi | 89% | 2749 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,244 psi | 90% | 2753 fps | 100% |
| Norma 203B | <<locked>> | 90% | 52,330 psi | 87% | 2782 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 52,968 psi | 88% | 2838 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 90% | 52,721 psi | 88% | 2805 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,721 psi | 86% | 2828 fps | 97.9% |
| Ramshot TAC | <<locked>> | 84% | 50,981 psi | 85% | 2720 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,027 psi | 90% | 2792 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 51,982 psi | 86% | 2713 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,781 psi | 59% | 1729 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,809 psi | 89% | 2740 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,389 psi | 90% | 2779 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 53,476 psi | 89% | 2861 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 52,982 psi | 88% | 2897 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,432 psi | 89% | 2871 fps | 99.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,417 psi | 89% | 2894 fps | 99% |
| Rottweil R 901 | <<locked>> | 84% | 51,953 psi | 86% | 2690 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,259 psi | 90% | 2749 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 52,924 psi | 88% | 2782 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 53,359 psi | 89% | 2756 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,462 psi | 90% | 2782 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 51,140 psi | 85% | 2733 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 52,170 psi | 87% | 2736 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 51,735 psi | 86% | 2759 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 50,966 psi | 85% | 2789 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 52,997 psi | 88% | 2753 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,664 psi | 89% | 2779 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 52,286 psi | 87% | 2648 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 52,243 psi | 87% | 2648 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 51,314 psi | 85% | 2680 fps | 96.8% |
| Somchem S321 | <<locked>> | 82% | 52,083 psi | 87% | 2743 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 51,692 psi | 86% | 2648 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 52,518 psi | 87% | 2746 fps | 99.7% |
| Somchem S355 | <<locked>> | 94% | 53,098 psi | 88% | 2776 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,282 psi | 79% | 2785 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 52,170 psi | 87% | 2615 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 52,475 psi | 87% | 2635 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 53,809 psi | 89% | 2713 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 51,793 psi | 86% | 2690 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 51,430 psi | 85% | 2713 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 52,127 psi | 87% | 2782 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 84% | 51,126 psi | 85% | 2707 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 52,939 psi | 88% | 2730 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 51,140 psi | 85% | 2785 fps | 98.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,929 psi | 66% | 2661 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 52,736 psi | 88% | 2769 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 54,418 psi | 90% | 2805 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,287 psi | 89% | 2844 fps | 97.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,953 psi | 55% | 2569 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,374 psi | 89% | 2785 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% | 46,746 psi | 78% | 2575 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,247 psi | 65% | 2497 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,064 psi | 77% | 2644 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,471 psi | 79% | 2618 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 37,101 psi | 62% | 2490 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 35,592 psi | 59% | 2520 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 43,076 psi | 72% | 2602 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 80% | 36,651 psi | 61% | 2454 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,121 psi | 75% | 2612 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 45,136 psi | 75% | 2602 fps | 100% |
| Alliant Power Pro 2000-MR | 36.2 gr | 80% | 38,957 psi | 65% | 2621 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,027 psi | 60% | 2474 fps | 98% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,827 psi | 65% | 2536 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,998 psi | 60% | 2533 fps | 95.8% |
| Alliant Reloder-17 | 35.6 gr | 80% | 30,995 psi | 51% | 2431 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,734 psi | 51% | 2425 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 38,174 psi | 63% | 2667 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,872 psi | 70% | 2598 fps | 97.6% |
| Bofors RP3 | <<locked>> | 80% | 35,462 psi | 59% | 2474 fps | 98% |
| Bofors RP7 | <<locked>> | 92% | 47,036 psi | 78% | 2651 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,673 psi | 78% | 2598 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,700 psi | 73% | 2631 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,950 psi | 80% | 2766 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 80% | 36,492 psi | 61% | 2477 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 92% | 43,787 psi | 73% | 2680 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 94% | 50,792 psi | 84% | 2753 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 43,424 psi | 72% | 2615 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,864 psi | 51% | 2375 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,276 psi | 65% | 2582 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 94% | 46,818 psi | 78% | 2753 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,121 psi | 43% | 1506 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,423 psi | 69% | 2559 fps | 98.8% |
| IMR 3031 | <<locked>> | 80% | 42,728 psi | 71% | 2608 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,464 psi | 64% | 2487 fps | 97.4% |
| IMR 4166 Enduron | <<locked>> | 84% | 46,311 psi | 77% | 2608 fps | 95.6% |
| IMR 4350 | <<locked>> | 96% | 47,036 psi | 78% | 2674 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,963 psi | 76% | 2631 fps | 95.4% |
| IMR 4831 | <<locked>> | 88% | 34,360 psi | 57% | 2474 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 39,740 psi | 66% | 2566 fps | 98.2% |
| IMR 8208 XBR | <<locked>> | 80% | 45,121 psi | 75% | 2612 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 50,691 psi | 84% | 2690 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,872 psi | 70% | 2582 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,062 psi | 72% | 2539 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 38,087 psi | 63% | 2490 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 40,030 psi | 67% | 2526 fps | 95.5% |
| Lovex S070 | <<locked>> | 92% | 43,004 psi | 71% | 2605 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 42,032 psi | 70% | 2556 fps | 99.4% |
| Norma 202 | <<locked>> | 80% | 42,308 psi | 70% | 2566 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,189 psi | 63% | 2526 fps | 97.8% |
| Norma URP | <<locked>> | 88% | 36,027 psi | 60% | 2523 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 37,565 psi | 62% | 2536 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 94% | 42,656 psi | 71% | 2664 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 44,831 psi | 74% | 2612 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,324 psi | 74% | 2631 fps | 98.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,399 psi | 80% | 2654 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,672 psi | 44% | 1549 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,343 psi | 84% | 2687 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,134 psi | 70% | 2569 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,495 psi | 67% | 2635 fps | 97.8% |
| ReloadSwiss RS 60 | 35.6 gr | 80% | 33,011 psi | 55% | 2500 fps | 98.8% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,215 psi | 59% | 2530 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 38,174 psi | 63% | 2598 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 46,166 psi | 77% | 2602 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,943 psi | 66% | 2507 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 33,460 psi | 56% | 2421 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 92% | 47,036 psi | 78% | 2651 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 40,030 psi | 67% | 2526 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,872 psi | 70% | 2582 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,087 psi | 63% | 2490 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 92% | 43,004 psi | 71% | 2605 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,461 psi | 57% | 2470 fps | 96.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,975 psi | 71% | 2585 fps | 97.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,524 psi | 69% | 2572 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,482 psi | 72% | 2510 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,071 psi | 60% | 2382 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 44,976 psi | 75% | 2579 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 48,399 psi | 80% | 2684 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,047 psi | 72% | 2513 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,656 psi | 71% | 2582 fps | 98.6% |
| Somchem S355 | <<locked>> | 80% | 34,316 psi | 57% | 2428 fps | 97.2% |
| Somchem S365 | <<locked>> | 82% | 26,469 psi | 44% | 2306 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 49,139 psi | 82% | 2572 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,772 psi | 73% | 2507 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,334 psi | 65% | 2493 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,089 psi | 67% | 2503 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,663 psi | 54% | 2369 fps | 98% |
| Vihtavuori N160 | <<locked>> | 86% | 35,230 psi | 59% | 2470 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 44,918 psi | 75% | 2605 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 38,566 psi | 64% | 2490 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 37,014 psi | 61% | 2526 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 94% | 32,851 psi | 55% | 2503 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 31,096 psi | 52% | 2346 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 44,338 psi | 74% | 2648 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 43,787 psi | 73% | 2680 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 98% | 31,096 psi | 52% | 2510 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,770 psi | 68% | 2572 fps | 98.8% |
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 | 125gr | Hasler ARIETE. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,897 fps; across all powders the maximum-charge window runs from 1,690 fps to 2,897 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 55–90 %, leaving at least 10 % headroom. The 125.0 gr projectile in 0.264" calls for a 1:8.0 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 Power Pro 2000-MR, Alliant Reloder-17 rank at the top here: for .260 Rem. with the .264 | 125gr | Hasler ARIETE 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.