Load Specifications
Bullet Manufacturer:Lapua
Bullet Weight:144 gr
Bullet Diameter:0.264"
Bullet Length:<<locked>>
Caliber:.260 Ackley Improved load data
Case Length (l3):2.03"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:56 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:9.0
Load data in caliber .260 Ackley Improved with .264 | 144gr | Lapua MaxRange Target OTM bullet and 107 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 ReloadSwiss RS 70.
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 2495 | <<locked>> | 86% | 55,637 psi | 89% | 2559 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,128 psi | 87% | 2575 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,282 psi | 74% | 2552 fps | 98.6% |
| Accurate 4064 | <<locked>> | 88% | 55,941 psi | 90% | 2612 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,869 psi | 90% | 2707 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 50,357 psi | 81% | 2730 fps | 96.2% |
| ADI AR 2206H | <<locked>> | 84% | 55,666 psi | 89% | 2641 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,316 psi | 85% | 2598 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,925 psi | 86% | 2694 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,404 psi | 87% | 2589 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,767 psi | 89% | 2556 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,434 psi | 89% | 2759 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 53,548 psi | 86% | 2690 fps | 97.6% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 53,548 psi | 86% | 2690 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 53,606 psi | 86% | 2618 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,157 psi | 87% | 2641 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 53,563 psi | 86% | 2713 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,650 psi | 88% | 2740 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,750 psi | 85% | 2680 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 46,456 psi | 74% | 2625 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,584 psi | 70% | 2572 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,537 psi | 62% | 2493 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,414 psi | 79% | 2746 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,448 psi | 89% | 2661 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 54,404 psi | 87% | 2635 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 46,456 psi | 74% | 2625 fps | 96.4% |
| Bofors RP7 | <<locked>> | 92% | 54,259 psi | 87% | 2618 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,057 psi | 90% | 2569 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,215 psi | 87% | 2621 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,969 psi | 88% | 2651 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 94% | 54,708 psi | 88% | 2703 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 92% | 55,143 psi | 88% | 2667 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 84% | 56,275 psi | 90% | 2648 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 53,287 psi | 85% | 2638 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,854 psi | 90% | 2680 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,897 psi | 88% | 2740 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,143 psi | 58% | 1601 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,969 psi | 87% | 2605 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,142 psi | 85% | 2579 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,115 psi | 90% | 2625 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,608 psi | 89% | 2612 fps | 99.1% |
| IMR 4350 | <<locked>> | 96% | 54,404 psi | 87% | 2641 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,738 psi | 89% | 2641 fps | 99% |
| IMR 4831 | <<locked>> | 98% | 56,246 psi | 90% | 2697 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 55,564 psi | 89% | 2667 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 53,664 psi | 86% | 2628 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 82% | 54,404 psi | 87% | 2589 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,680 psi | 89% | 2615 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,868 psi | 88% | 2569 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,202 psi | 90% | 2621 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,521 psi | 89% | 2638 fps | 99.7% |
| Lovex S070 | <<locked>> | 94% | 53,069 psi | 85% | 2625 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,435 psi | 62% | 2415 fps | 96.9% |
| Norma 201 | <<locked>> | 84% | 54,447 psi | 87% | 2585 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,071 psi | 88% | 2585 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,403 psi | 86% | 2628 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,969 psi | 88% | 2690 fps | 97.7% |
| Norma MRPᴾ | <<locked>> | 100% | 48,921 psi | 78% | 2700 fps | 98.3% |
| Norma URP | <<locked>> | 96% | 54,853 psi | 88% | 2694 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 53,635 psi | 86% | 2648 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 53,447 psi | 86% | 2694 fps | 99.4% |
| Ramshot TAC | <<locked>> | 82% | 54,404 psi | 87% | 2612 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,505 psi | 87% | 2631 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,434 psi | 58% | 1634 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,056 psi | 88% | 2635 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,708 psi | 88% | 2700 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 53,969 psi | 87% | 2730 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,883 psi | 90% | 2733 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,723 psi | 88% | 2759 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 55,303 psi | 89% | 2562 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,911 psi | 88% | 2585 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,288 psi | 87% | 2628 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 55,651 psi | 89% | 2664 fps | 96.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,808 psi | 83% | 2667 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 92% | 54,259 psi | 87% | 2618 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,521 psi | 89% | 2638 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,680 psi | 89% | 2615 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,202 psi | 90% | 2621 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,069 psi | 85% | 2625 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,811 psi | 89% | 2684 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,055 psi | 85% | 2592 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,070 psi | 87% | 2615 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,608 psi | 89% | 2523 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,115 psi | 90% | 2523 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,622 psi | 89% | 2595 fps | 99% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,358 psi | 82% | 2664 fps | 97.5% |
| Somchem S335 | <<locked>> | 84% | 55,143 psi | 88% | 2523 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 52,649 psi | 84% | 2582 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,563 psi | 87% | 2625 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 53,301 psi | 85% | 2694 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,562 psi | 84% | 2648 fps | 98.3% |
| Vihtavuori N133 | <<locked>> | 84% | 56,014 psi | 90% | 2507 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,940 psi | 88% | 2546 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,695 psi | 89% | 2566 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,898 psi | 90% | 2602 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 53,780 psi | 86% | 2641 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,208 psi | 72% | 2516 fps | 96.5% |
| Vihtavuori N530 | <<locked>> | 82% | 54,839 psi | 88% | 2589 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 53,693 psi | 86% | 2566 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,362 psi | 90% | 2697 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,530 psi | 78% | 2644 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 53,359 psi | 86% | 2615 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,187 psi | 88% | 2635 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,100 psi | 88% | 2710 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,146 psi | 63% | 2608 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,998 psi | 87% | 2621 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 49,139 psi | 79% | 2585 fps | 96.6% |
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 2495 | <<locked>> | 80% | 46,166 psi | 74% | 2434 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,701 psi | 72% | 2428 fps | 96.5% |
| Accurate 3100 | <<locked>> | 92% | 35,302 psi | 57% | 2352 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 43,671 psi | 70% | 2438 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,329 psi | 52% | 2293 fps | 96.7% |
| Accurate High Country | <<locked>> | 98% | 47,094 psi | 76% | 2674 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 48,979 psi | 79% | 2543 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 41,727 psi | 67% | 2408 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 44,222 psi | 71% | 2530 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,024 psi | 82% | 2539 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,402 psi | 84% | 2513 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,063 psi | 72% | 2595 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 44,338 psi | 71% | 2536 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 44,338 psi | 71% | 2536 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,901 psi | 67% | 2434 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,614 psi | 72% | 2490 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,416 psi | 52% | 2306 fps | 96.8% |
| Alliant Reloder-17 | 36.8 gr | 80% | 36,376 psi | 58% | 2428 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 43,772 psi | 70% | 2530 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 43,497 psi | 70% | 2572 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,687 psi | 43% | 2182 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,939 psi | 54% | 2385 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 88% | 32,300 psi | 52% | 2392 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,530 psi | 78% | 2559 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 41,640 psi | 67% | 2441 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 43,497 psi | 70% | 2572 fps | 95.6% |
| Bofors RP7 | <<locked>> | 82% | 39,813 psi | 64% | 2372 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,634 psi | 84% | 2523 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,444 psi | 81% | 2569 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,322 psi | 68% | 2448 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 37,086 psi | 59% | 2395 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 84% | 42,902 psi | 69% | 2464 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 49,487 psi | 79% | 2552 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,921 psi | 48% | 2215 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,861 psi | 74% | 2536 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 38,711 psi | 62% | 2454 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,847 psi | 43% | 1424 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,413 psi | 76% | 2507 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 49,995 psi | 80% | 2539 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,859 psi | 70% | 2441 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,311 psi | 74% | 2464 fps | 97.6% |
| IMR 4350 | <<locked>> | 86% | 40,089 psi | 64% | 2398 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,624 psi | 62% | 2349 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 31,459 psi | 50% | 2257 fps | 96.4% |
| IMR 4895 | <<locked>> | 80% | 45,716 psi | 73% | 2516 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 98% | 50,328 psi | 81% | 2579 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 51,024 psi | 82% | 2539 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,820 psi | 78% | 2523 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,675 psi | 78% | 2480 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,005 psi | 71% | 2441 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,274 psi | 58% | 2303 fps | 96.4% |
| Lovex S070 | <<locked>> | 82% | 36,550 psi | 59% | 2329 fps | 95.3% |
| Lovex S071 | <<locked>> | 96% | 33,997 psi | 55% | 2323 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 48,182 psi | 77% | 2497 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,660 psi | 78% | 2497 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,961 psi | 70% | 2480 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 45,034 psi | 72% | 2530 fps | 95.5% |
| Norma MRP | <<locked>> | 92% | 37,304 psi | 60% | 2474 fps | 95% |
| Norma URP | <<locked>> | 80% | 32,764 psi | 53% | 2300 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 80% | 43,801 psi | 70% | 2497 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 33,953 psi | 54% | 2336 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 51,111 psi | 82% | 2566 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,778 psi | 81% | 2579 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,195 psi | 44% | 1457 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,380 psi | 68% | 2428 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,819 psi | 77% | 2598 fps | 99.9% |
| ReloadSwiss RS 60 | 36.8 gr | 80% | 38,667 psi | 62% | 2480 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,082 psi | 51% | 2310 fps | 96.2% |
| ReloadSwiss RS 70 | 37.3 gr | 80% | 31,792 psi | 51% | 2310 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 52,228 psi | 84% | 2520 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,861 psi | 74% | 2451 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,407 psi | 63% | 2392 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 96% | 49,168 psi | 79% | 2566 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 94% | 42,612 psi | 68% | 2513 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 82% | 39,813 psi | 64% | 2372 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,274 psi | 58% | 2303 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,820 psi | 78% | 2523 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,005 psi | 71% | 2441 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 36,550 psi | 59% | 2329 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,277 psi | 65% | 2441 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,690 psi | 80% | 2543 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,601 psi | 76% | 2520 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,095 psi | 79% | 2434 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,162 psi | 66% | 2316 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,768 psi | 61% | 2300 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 42,206 psi | 68% | 2507 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 48,936 psi | 78% | 2441 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,371 psi | 79% | 2536 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 39,972 psi | 64% | 2395 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 29,196 psi | 47% | 2254 fps | 98.6% |
| Somchem S385 | <<locked>> | 92% | 40,335 psi | 65% | 2441 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 49,530 psi | 79% | 2421 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,571 psi | 73% | 2421 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,151 psi | 74% | 2438 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,087 psi | 61% | 2333 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 33,881 psi | 54% | 2293 fps | 97% |
| Vihtavuori N165 | <<locked>> | 98% | 42,279 psi | 68% | 2467 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 51,372 psi | 82% | 2539 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,367 psi | 71% | 2431 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,504 psi | 54% | 2300 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 82% | 26,977 psi | 43% | 2201 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,460 psi | 54% | 2274 fps | 98.8% |
| Winchester 748 | <<locked>> | 80% | 51,706 psi | 83% | 2589 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 37,086 psi | 59% | 2395 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,034 psi | 40% | 2198 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,108 psi | 76% | 2523 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 42,873 psi | 69% | 2480 fps | 95% |
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 107 powders for .260 Ackley Improved loaded with the .264 | 144gr | Lapua MaxRange Target OTM. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,759 fps; across all powders the maximum-charge window runs from 1,601 fps to 2,759 fps. Accurate 3100 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 144.0 gr projectile in 0.264" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, 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 Reloder-17, ReloadSwiss RS 60, ReloadSwiss RS 70 rank at the top here: for .260 Ackley Improved with the .264 | 144gr | Lapua MaxRange Target OTM 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.