Load Specifications
Bullet:.264 | 139gr | Lapua Scenar
Bullet Manufacturer:Lapua
Bullet Weight:139 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:1:8.5
Load data in caliber .260 Ackley Improved with .264 | 139gr | Lapua Scenar bullet and 102 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance 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>> | 82% | 54,389 psi | 87% | 2546 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 53,505 psi | 86% | 2579 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,882 psi | 88% | 2638 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,579 psi | 89% | 2635 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,034 psi | 71% | 2552 fps | 97.7% |
| Accurate 4064 | <<locked>> | 88% | 53,461 psi | 86% | 2625 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 53,171 psi | 85% | 2710 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 53,476 psi | 86% | 2651 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 54,636 psi | 88% | 2657 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 51,459 psi | 83% | 2690 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,767 psi | 89% | 2648 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 53,592 psi | 86% | 2575 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,055 psi | 85% | 2766 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 51,416 psi | 82% | 2690 fps | 96.7% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 51,416 psi | 82% | 2690 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 54,795 psi | 88% | 2677 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,448 psi | 89% | 2700 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 54,491 psi | 87% | 2766 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 55,825 psi | 90% | 2799 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 50,647 psi | 81% | 2684 fps | 96.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,626 psi | 67% | 2575 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 36,680 psi | 59% | 2480 fps | 96.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 46,760 psi | 75% | 2740 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,229 psi | 85% | 2667 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 55,666 psi | 89% | 2694 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 55,245 psi | 89% | 2667 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,012 psi | 87% | 2585 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 55,405 psi | 89% | 2680 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 56,347 psi | 90% | 2710 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 96% | 55,985 psi | 90% | 2762 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 92% | 52,968 psi | 85% | 2671 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 84% | 54,041 psi | 87% | 2661 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,476 psi | 87% | 2694 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 53,824 psi | 86% | 2697 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 52,692 psi | 84% | 2743 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,882 psi | 58% | 1617 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,347 psi | 89% | 2664 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 54,331 psi | 87% | 2641 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,317 psi | 87% | 2641 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 53,998 psi | 87% | 2625 fps | 98.5% |
| IMR 4350 | <<locked>> | 98% | 55,811 psi | 89% | 2700 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 53,693 psi | 86% | 2648 fps | 98.4% |
| IMR 4831 | <<locked>> | 98% | 53,751 psi | 86% | 2703 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 53,258 psi | 85% | 2677 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 55,767 psi | 89% | 2648 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 53,693 psi | 86% | 2631 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,333 psi | 90% | 2628 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 53,969 psi | 87% | 2631 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 53,432 psi | 86% | 2644 fps | 99.3% |
| Lovex S070 | <<locked>> | 96% | 54,317 psi | 87% | 2680 fps | 98.8% |
| Norma 201 | <<locked>> | 86% | 55,811 psi | 89% | 2648 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,362 psi | 90% | 2644 fps | 100% |
| Norma 203B | <<locked>> | 88% | 54,650 psi | 88% | 2687 fps | 100% |
| Norma 204 | <<locked>> | 98% | 56,434 psi | 90% | 2746 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 46,412 psi | 74% | 2694 fps | 97.3% |
| Norma URP | <<locked>> | 98% | 55,680 psi | 89% | 2749 fps | 100% |
| Ramshot Big Game | <<locked>> | 88% | 55,259 psi | 89% | 2713 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 54,665 psi | 88% | 2753 fps | 99.3% |
| Ramshot TAC | <<locked>> | 84% | 56,173 psi | 90% | 2677 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 55,767 psi | 89% | 2690 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,492 psi | 59% | 1660 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 52,953 psi | 85% | 2641 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 55,898 psi | 90% | 2759 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 55,593 psi | 89% | 2795 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 52,881 psi | 85% | 2733 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 56,086 psi | 90% | 2818 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 53,505 psi | 86% | 2582 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 56,289 psi | 90% | 2644 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,506 psi | 89% | 2687 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 53,519 psi | 86% | 2671 fps | 95.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 49,139 psi | 79% | 2664 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 94% | 55,245 psi | 89% | 2667 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 53,432 psi | 86% | 2644 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 53,693 psi | 86% | 2631 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 53,969 psi | 87% | 2631 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,317 psi | 87% | 2680 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 53,461 psi | 86% | 2697 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 54,723 psi | 88% | 2657 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,332 psi | 89% | 2674 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 53,911 psi | 86% | 2543 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 53,998 psi | 87% | 2539 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 53,592 psi | 86% | 2602 fps | 98.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 48,675 psi | 78% | 2657 fps | 96.4% |
| Somchem S335 | <<locked>> | 84% | 53,417 psi | 86% | 2543 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,259 psi | 87% | 2644 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 55,419 psi | 89% | 2680 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 53,882 psi | 86% | 2749 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 49,893 psi | 80% | 2644 fps | 97.4% |
| Vihtavuori N133 | <<locked>> | 84% | 54,259 psi | 87% | 2526 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 56,246 psi | 90% | 2605 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 53,461 psi | 86% | 2582 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 53,635 psi | 86% | 2615 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 54,621 psi | 88% | 2694 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 56,289 psi | 90% | 2648 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,013 psi | 88% | 2625 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 53,635 psi | 86% | 2700 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,079 psi | 74% | 2648 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 54,737 psi | 88% | 2674 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 52,866 psi | 85% | 2648 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 56,391 psi | 90% | 2769 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,391 psi | 60% | 2602 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,288 psi | 89% | 2684 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% | 51,285 psi | 82% | 2507 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,237 psi | 71% | 2448 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,372 psi | 82% | 2592 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 42,917 psi | 69% | 2428 fps | 95.5% |
| Accurate 3100 | <<locked>> | 94% | 35,882 psi | 58% | 2398 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 41,829 psi | 67% | 2451 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 30,792 psi | 49% | 2293 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 47,282 psi | 76% | 2556 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 40,277 psi | 65% | 2418 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 96% | 45,353 psi | 73% | 2585 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,356 psi | 79% | 2556 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,357 psi | 81% | 2536 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,381 psi | 70% | 2602 fps | 99.3% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 45,005 psi | 72% | 2582 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 45,005 psi | 72% | 2582 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,001 psi | 64% | 2438 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,960 psi | 69% | 2500 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,140 psi | 50% | 2306 fps | 95.6% |
| Alliant Reloder-17 | 36.3 gr | 80% | 34,664 psi | 56% | 2425 fps | 98.6% |
| Alliant Reloder-19 | <<locked>> | 96% | 44,469 psi | 71% | 2575 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 86% | 27,122 psi | 43% | 2224 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 98% | 34,621 psi | 56% | 2431 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 90% | 33,083 psi | 53% | 2444 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,470 psi | 75% | 2562 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 39,958 psi | 64% | 2448 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 40,712 psi | 65% | 2421 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,039 psi | 82% | 2543 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,660 psi | 78% | 2585 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,727 psi | 65% | 2454 fps | 98% |
| Hodgdon H414 | <<locked>> | 86% | 40,393 psi | 65% | 2500 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 86% | 43,845 psi | 70% | 2516 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 47,761 psi | 77% | 2566 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,674 psi | 46% | 2215 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,063 psi | 71% | 2549 fps | 100% |
| Hodgdon Superformance | 42.2 gr | 88% | 42,525 psi | 68% | 2566 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,818 psi | 43% | 1447 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,774 psi | 73% | 2520 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 47,659 psi | 76% | 2549 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,279 psi | 68% | 2448 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,831 psi | 72% | 2474 fps | 96.8% |
| IMR 4350 | <<locked>> | 88% | 40,930 psi | 66% | 2451 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 82% | 39,784 psi | 64% | 2405 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 30,008 psi | 48% | 2257 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 44,034 psi | 71% | 2530 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 49,356 psi | 79% | 2556 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,934 psi | 75% | 2536 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,123 psi | 76% | 2493 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 42,395 psi | 68% | 2454 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 34,925 psi | 56% | 2310 fps | 95.4% |
| Lovex S070 | <<locked>> | 84% | 37,304 psi | 60% | 2382 fps | 95% |
| Norma 201 | <<locked>> | 80% | 46,485 psi | 75% | 2510 fps | 100% |
| Norma 202 | <<locked>> | 80% | 46,615 psi | 75% | 2510 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,337 psi | 68% | 2490 fps | 99.5% |
| Norma 204 | <<locked>> | 92% | 46,122 psi | 74% | 2582 fps | 95.2% |
| Norma MRP | <<locked>> | 96% | 40,611 psi | 65% | 2579 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 31,111 psi | 50% | 2293 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 42,105 psi | 68% | 2507 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 36,883 psi | 59% | 2434 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 49,211 psi | 79% | 2572 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,066 psi | 79% | 2592 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,137 psi | 44% | 1480 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,886 psi | 66% | 2434 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,498 psi | 73% | 2602 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,869 psi | 59% | 2480 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 32,779 psi | 53% | 2362 fps | 95.9% |
| ReloadSwiss RS 70 | 38.7 gr | 84% | 34,838 psi | 56% | 2418 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 50,488 psi | 81% | 2536 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,266 psi | 71% | 2464 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 37,492 psi | 60% | 2395 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 98% | 50,038 psi | 80% | 2615 fps | 95% |
| Rottweil R 905 | <<locked>> | 98% | 46,195 psi | 74% | 2612 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 84% | 40,712 psi | 65% | 2421 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,925 psi | 56% | 2310 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,934 psi | 75% | 2536 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,395 psi | 68% | 2454 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 37,304 psi | 60% | 2382 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,377 psi | 62% | 2441 fps | 98.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,645 psi | 76% | 2549 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,629 psi | 73% | 2526 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,442 psi | 76% | 2451 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,697 psi | 64% | 2333 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 38,624 psi | 62% | 2352 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 45,759 psi | 73% | 2608 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 47,355 psi | 76% | 2457 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,311 psi | 76% | 2543 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 38,406 psi | 62% | 2402 fps | 99.2% |
| Somchem S365 | <<locked>> | 80% | 27,934 psi | 45% | 2254 fps | 97.7% |
| Somchem S385 | <<locked>> | 94% | 41,104 psi | 66% | 2490 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 47,863 psi | 77% | 2441 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,787 psi | 70% | 2438 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,193 psi | 71% | 2448 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,332 psi | 58% | 2336 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 32,474 psi | 52% | 2297 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 80% | 49,603 psi | 80% | 2556 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,786 psi | 69% | 2444 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,097 psi | 51% | 2300 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 86% | 29,196 psi | 47% | 2297 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,053 psi | 51% | 2274 fps | 97.9% |
| Winchester 748 | <<locked>> | 80% | 49,429 psi | 79% | 2598 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 40,393 psi | 65% | 2500 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,093 psi | 43% | 2300 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,411 psi | 73% | 2536 fps | 99.9% |
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 102 powders for .260 Ackley Improved loaded with the .264 | 139gr | Lapua Scenar. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,818 fps; across all powders the maximum-charge window runs from 1,617 fps to 2,818 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 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 139.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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 70, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .260 Ackley Improved with the .264 | 139gr | Lapua Scenar 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.