Load Specifications
Load data in caliber .260 Ackley Improved with .264 | 121gr | Lehigh Defense Match Solid bullet and 103 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, Alliant Reloder-17 and ReloadSwiss RS 60.
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% | 55,869 psi | 90% | 2756 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,012 psi | 87% | 2779 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,157 psi | 87% | 2779 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,057 psi | 90% | 2841 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,635 psi | 86% | 2766 fps | 96.2% |
| Accurate 4064 | <<locked>> | 92% | 53,838 psi | 86% | 2822 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,113 psi | 85% | 2890 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 88% | 54,998 psi | 88% | 2854 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 94% | 55,941 psi | 90% | 2851 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,969 psi | 87% | 2805 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 54,505 psi | 87% | 2785 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,854 psi | 90% | 2913 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,433 psi | 87% | 2969 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,550 psi | 89% | 2874 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,564 psi | 89% | 2759 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,275 psi | 90% | 2894 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,517 psi | 83% | 2897 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,043 psi | 90% | 2989 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,695 psi | 59% | 2628 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,727 psi | 65% | 2772 fps | 96.4% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,360 psi | 87% | 2864 fps | 99.4% |
| Bofors RP3 | <<locked>> | 94% | 56,188 psi | 90% | 2887 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 52,866 psi | 85% | 2795 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,695 psi | 89% | 2789 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 52,997 psi | 85% | 2835 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,911 psi | 88% | 2930 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 82% | 54,433 psi | 87% | 2799 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,666 psi | 89% | 2828 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 53,534 psi | 86% | 2844 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 98% | 52,910 psi | 85% | 2890 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 96% | 54,070 psi | 87% | 2854 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 88% | 55,506 psi | 89% | 2867 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,616 psi | 76% | 2772 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,244 psi | 87% | 2890 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 53,896 psi | 86% | 2923 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,331 psi | 57% | 1726 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,098 psi | 85% | 2812 fps | 99.9% |
| IMR 3031 | <<locked>> | 88% | 55,187 psi | 88% | 2848 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,230 psi | 89% | 2831 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,564 psi | 89% | 2812 fps | 97.4% |
| IMR 4198 | <<locked>> | 82% | 55,448 psi | 89% | 2717 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,997 psi | 85% | 2822 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,897 psi | 88% | 2831 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,647 psi | 81% | 2835 fps | 99% |
| IMR 4895 | <<locked>> | 90% | 54,041 psi | 87% | 2871 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 53,969 psi | 87% | 2805 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,838 psi | 86% | 2789 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,259 psi | 87% | 2828 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,520 psi | 87% | 2779 fps | 99.8% |
| Lovex S062 | <<locked>> | 92% | 54,955 psi | 88% | 2831 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,273 psi | 87% | 2828 fps | 98.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,998 psi | 88% | 2861 fps | 97.6% |
| Norma 201 | <<locked>> | 88% | 53,490 psi | 86% | 2799 fps | 100% |
| Norma 202 | <<locked>> | 88% | 53,896 psi | 86% | 2802 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,434 psi | 89% | 2881 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 52,620 psi | 84% | 2884 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 92% | 56,057 psi | 90% | 2910 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,271 psi | 82% | 2871 fps | 97.6% |
| Ramshot TAC | <<locked>> | 86% | 54,288 psi | 87% | 2822 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,548 psi | 86% | 2838 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,056 psi | 88% | 2808 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,810 psi | 57% | 1768 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,214 psi | 85% | 2782 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,230 psi | 87% | 2828 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 52,924 psi | 85% | 2907 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,927 psi | 90% | 2992 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,852 psi | 85% | 2913 fps | 99.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,272 psi | 85% | 2943 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 86% | 54,534 psi | 87% | 2782 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,983 psi | 87% | 2795 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 56,043 psi | 90% | 2881 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 52,866 psi | 85% | 2795 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,273 psi | 87% | 2828 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,259 psi | 87% | 2828 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,955 psi | 88% | 2831 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,998 psi | 88% | 2861 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,230 psi | 87% | 2887 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,202 psi | 90% | 2779 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,144 psi | 90% | 2851 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,258 psi | 85% | 2825 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,405 psi | 89% | 2743 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,100 psi | 88% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,737 psi | 88% | 2782 fps | 97.2% |
| Somchem S321 | <<locked>> | 84% | 55,172 psi | 88% | 2841 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,447 psi | 87% | 2740 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,492 psi | 89% | 2841 fps | 99.8% |
| Somchem S355 | <<locked>> | 96% | 56,231 psi | 90% | 2874 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,905 psi | 75% | 2831 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 54,897 psi | 88% | 2703 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,506 psi | 89% | 2726 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 53,490 psi | 86% | 2762 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,534 psi | 87% | 2779 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,476 psi | 87% | 2808 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,013 psi | 88% | 2877 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 86% | 54,418 psi | 87% | 2805 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,985 psi | 90% | 2822 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,273 psi | 87% | 2887 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,624 psi | 64% | 2703 fps | 97.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,811 psi | 89% | 2861 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 53,954 psi | 87% | 2851 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 52,910 psi | 85% | 2890 fps | 97.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,648 psi | 52% | 2598 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 90% | 56,420 psi | 90% | 2881 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 | 74% | 2621 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,575 psi | 81% | 2730 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,827 psi | 62% | 2539 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,861 psi | 74% | 2690 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 50,285 psi | 81% | 2713 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 36,738 psi | 59% | 2530 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 35,273 psi | 57% | 2559 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 42,656 psi | 68% | 2644 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 36,347 psi | 58% | 2493 fps | 96.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,672 psi | 72% | 2654 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 80% | 44,744 psi | 72% | 2648 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,185 psi | 84% | 2858 fps | 99.9% |
| Alliant Power Pro 2000-MR | 36.8 gr | 80% | 38,450 psi | 62% | 2657 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,665 psi | 57% | 2513 fps | 97.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,996 psi | 83% | 2710 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,450 psi | 62% | 2575 fps | 97.1% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,766 psi | 57% | 2572 fps | 95.4% |
| Alliant Reloder-17 | 36.3 gr | 80% | 30,835 psi | 49% | 2470 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 32,474 psi | 52% | 2516 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 98% | 38,072 psi | 61% | 2710 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,626 psi | 67% | 2641 fps | 97.4% |
| Bofors RP3 | <<locked>> | 80% | 35,288 psi | 57% | 2516 fps | 97.8% |
| Bofors RP7 | <<locked>> | 94% | 49,864 psi | 80% | 2746 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,615 psi | 75% | 2648 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,120 psi | 69% | 2671 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,616 psi | 76% | 2812 fps | 99% |
| Hodgdon H322 | <<locked>> | 80% | 51,227 psi | 82% | 2753 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,098 psi | 84% | 2779 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 38,566 psi | 62% | 2569 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 94% | 46,253 psi | 74% | 2776 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 94% | 50,618 psi | 81% | 2799 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 43,033 psi | 69% | 2654 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,719 psi | 49% | 2415 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,769 psi | 62% | 2618 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 96% | 49,995 psi | 80% | 2858 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,339 psi | 42% | 1542 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,365 psi | 66% | 2608 fps | 98.7% |
| IMR 3031 | <<locked>> | 80% | 42,366 psi | 68% | 2651 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,145 psi | 61% | 2530 fps | 97.1% |
| IMR 4166 Enduron | <<locked>> | 84% | 46,122 psi | 74% | 2654 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 52,214 psi | 84% | 2674 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 49,617 psi | 80% | 2766 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,948 psi | 74% | 2680 fps | 95.2% |
| IMR 4831 | <<locked>> | 90% | 36,506 psi | 59% | 2569 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 39,363 psi | 63% | 2605 fps | 97.9% |
| IMR 8208 XBR | <<locked>> | 80% | 44,672 psi | 72% | 2654 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 80% | 50,415 psi | 81% | 2736 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,408 psi | 66% | 2621 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 43,047 psi | 69% | 2585 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 38,043 psi | 61% | 2536 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 39,813 psi | 64% | 2569 fps | 95.1% |
| Lovex S070 | <<locked>> | 94% | 45,469 psi | 73% | 2700 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 41,669 psi | 67% | 2595 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 41,901 psi | 67% | 2608 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,826 psi | 61% | 2566 fps | 97.5% |
| Norma URP | <<locked>> | 88% | 35,505 psi | 57% | 2556 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 37,072 psi | 59% | 2569 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 94% | 42,453 psi | 68% | 2707 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 44,599 psi | 72% | 2654 fps | 96.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,092 psi | 71% | 2677 fps | 98.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,182 psi | 77% | 2700 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,571 psi | 43% | 1578 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,198 psi | 80% | 2736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 44,672 psi | 72% | 2664 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,958 psi | 64% | 2674 fps | 97.5% |
| ReloadSwiss RS 60 | 36.3 gr | 80% | 32,837 psi | 53% | 2539 fps | 98.6% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 37,521 psi | 60% | 2628 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,596 psi | 65% | 2697 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 45,847 psi | 74% | 2644 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,943 psi | 64% | 2552 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 33,127 psi | 53% | 2457 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 94% | 49,864 psi | 80% | 2746 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,813 psi | 64% | 2569 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,408 psi | 66% | 2621 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 38,043 psi | 61% | 2536 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 94% | 45,469 psi | 73% | 2700 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,084 psi | 55% | 2507 fps | 96.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,866 psi | 85% | 2733 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,714 psi | 68% | 2625 fps | 96.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,060 psi | 66% | 2612 fps | 98.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,221 psi | 69% | 2556 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,810 psi | 57% | 2425 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 44,904 psi | 72% | 2621 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 48,138 psi | 77% | 2730 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 42,699 psi | 68% | 2556 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,380 psi | 68% | 2625 fps | 98.4% |
| Somchem S355 | <<locked>> | 80% | 33,982 psi | 54% | 2464 fps | 96.8% |
| Somchem S365 | <<locked>> | 84% | 27,963 psi | 45% | 2395 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 48,834 psi | 78% | 2618 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,482 psi | 70% | 2552 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,015 psi | 63% | 2536 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,711 psi | 64% | 2543 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,329 psi | 52% | 2405 fps | 97.7% |
| Vihtavuori N160 | <<locked>> | 88% | 37,434 psi | 60% | 2566 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 44,831 psi | 72% | 2651 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 38,159 psi | 61% | 2530 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 36,709 psi | 59% | 2566 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 94% | 32,503 psi | 52% | 2536 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,893 psi | 50% | 2382 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 44,121 psi | 71% | 2694 fps | 99.9% |
| Winchester 760 | <<locked>> | 94% | 46,253 psi | 74% | 2776 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,864 psi | 49% | 2539 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,582 psi | 65% | 2615 fps | 98.6% |
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 113 powders for .260 Ackley Improved loaded with the .264 | 121gr | Lehigh Defense Match Solid. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,992 fps; across all powders the maximum-charge window runs from 1,726 fps to 2,992 fps. Accurate 3100 gives the best case fill at 100 %, and 113 of the 113 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 121.0 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, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .260 Ackley Improved with the .264 | 121gr | Lehigh Defense Match Solid 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.