Load Specifications
Bullet:.264 | 140gr | Hornady A-Tip
Bullet Manufacturer:Hornady
Bullet Weight:140 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 | 140gr | Hornady A-Tip bullet and 102 powders. The key underlying parameters are shown in the table above.
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% | 54,926 psi | 88% | 2546 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 54,099 psi | 87% | 2575 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,434 psi | 89% | 2638 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,101 psi | 90% | 2631 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,193 psi | 71% | 2546 fps | 97.9% |
| Accurate 4064 | <<locked>> | 88% | 54,041 psi | 87% | 2621 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 53,838 psi | 86% | 2710 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 53,969 psi | 87% | 2651 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,172 psi | 88% | 2654 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 51,967 psi | 83% | 2690 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 56,304 psi | 90% | 2648 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,186 psi | 87% | 2572 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,577 psi | 86% | 2766 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 51,547 psi | 83% | 2687 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,361 psi | 89% | 2674 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,593 psi | 89% | 2694 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,027 psi | 88% | 2766 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 55,999 psi | 90% | 2792 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 50,778 psi | 81% | 2677 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,047 psi | 67% | 2575 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,057 psi | 59% | 2484 fps | 96.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,282 psi | 76% | 2740 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,780 psi | 86% | 2667 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 55,796 psi | 89% | 2687 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 55,811 psi | 89% | 2667 fps | 98.4% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,505 psi | 87% | 2582 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 55,999 psi | 90% | 2680 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,301 psi | 85% | 2657 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 94% | 52,924 psi | 85% | 2710 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 92% | 53,476 psi | 86% | 2671 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 84% | 54,549 psi | 87% | 2657 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,723 psi | 88% | 2687 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 53,983 psi | 87% | 2690 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 53,258 psi | 85% | 2746 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,839 psi | 57% | 1614 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,477 psi | 89% | 2657 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 54,911 psi | 88% | 2638 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,447 psi | 87% | 2635 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,114 psi | 87% | 2618 fps | 98.6% |
| IMR 4350 | <<locked>> | 98% | 55,941 psi | 90% | 2690 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,215 psi | 87% | 2648 fps | 98.6% |
| IMR 4831 | <<locked>> | 98% | 54,360 psi | 87% | 2703 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 53,809 psi | 86% | 2674 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 56,304 psi | 90% | 2648 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 53,838 psi | 86% | 2625 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,316 psi | 85% | 2579 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 54,476 psi | 87% | 2631 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 53,548 psi | 86% | 2638 fps | 99.4% |
| Lovex S070 | <<locked>> | 96% | 54,476 psi | 87% | 2674 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 36,898 psi | 59% | 2411 fps | 95.9% |
| Norma 201 | <<locked>> | 86% | 56,347 psi | 90% | 2644 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,330 psi | 86% | 2595 fps | 100% |
| Norma 203B | <<locked>> | 88% | 54,795 psi | 88% | 2680 fps | 100% |
| Norma 204 | <<locked>> | 96% | 53,287 psi | 85% | 2694 fps | 97% |
| Norma MRPᴾ | <<locked>> | 100% | 46,934 psi | 75% | 2694 fps | 97.5% |
| Norma URP | <<locked>> | 98% | 56,275 psi | 90% | 2746 fps | 100% |
| Ramshot Big Game | <<locked>> | 88% | 55,419 psi | 89% | 2707 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 55,259 psi | 89% | 2753 fps | 99.4% |
| Ramshot TAC | <<locked>> | 82% | 52,881 psi | 85% | 2621 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 84% | 56,304 psi | 90% | 2687 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,448 psi | 58% | 1654 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,432 psi | 86% | 2641 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 52,779 psi | 85% | 2707 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 55,811 psi | 89% | 2789 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 53,476 psi | 86% | 2733 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 56,275 psi | 90% | 2812 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 54,027 psi | 87% | 2579 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,287 psi | 85% | 2595 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,680 psi | 89% | 2680 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 53,650 psi | 86% | 2664 fps | 96% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 49,690 psi | 80% | 2664 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 94% | 55,811 psi | 89% | 2667 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 53,548 psi | 86% | 2638 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 53,838 psi | 86% | 2625 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,476 psi | 87% | 2631 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,476 psi | 87% | 2674 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 53,983 psi | 87% | 2694 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,303 psi | 89% | 2657 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,883 psi | 90% | 2674 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,012 psi | 87% | 2533 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,549 psi | 87% | 2539 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 53,664 psi | 86% | 2595 fps | 98.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 49,197 psi | 79% | 2657 fps | 96.6% |
| Somchem S335 | <<locked>> | 84% | 53,534 psi | 86% | 2533 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,824 psi | 88% | 2644 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 55,985 psi | 90% | 2677 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,534 psi | 87% | 2746 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,459 psi | 81% | 2644 fps | 97.6% |
| Vihtavuori N133 | <<locked>> | 84% | 54,375 psi | 87% | 2520 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,142 psi | 85% | 2559 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 53,998 psi | 87% | 2579 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 53,766 psi | 86% | 2608 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,216 psi | 89% | 2694 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 82% | 53,214 psi | 85% | 2598 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,550 psi | 89% | 2621 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,215 psi | 87% | 2700 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,615 psi | 75% | 2648 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,317 psi | 89% | 2671 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,388 psi | 86% | 2644 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 52,924 psi | 85% | 2710 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,521 psi | 60% | 2598 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,796 psi | 89% | 2680 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 51,808 psi | 83% | 2503 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,440 psi | 71% | 2441 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 51,909 psi | 83% | 2589 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,323 psi | 69% | 2428 fps | 95.7% |
| Accurate 3100 | <<locked>> | 94% | 36,056 psi | 58% | 2395 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 42,032 psi | 67% | 2444 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,183 psi | 50% | 2297 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 47,747 psi | 77% | 2556 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 40,683 psi | 65% | 2418 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 96% | 45,803 psi | 73% | 2585 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,850 psi | 80% | 2556 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,517 psi | 81% | 2526 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,511 psi | 70% | 2595 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 45,498 psi | 73% | 2585 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,393 psi | 65% | 2438 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,410 psi | 70% | 2500 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,488 psi | 50% | 2306 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,041 psi | 56% | 2425 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 96% | 44,889 psi | 72% | 2575 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 86% | 27,412 psi | 44% | 2228 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 98% | 34,751 psi | 56% | 2428 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 90% | 33,199 psi | 53% | 2441 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,978 psi | 75% | 2562 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 40,074 psi | 64% | 2441 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 40,843 psi | 65% | 2418 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,140 psi | 82% | 2536 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,791 psi | 78% | 2579 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,857 psi | 66% | 2448 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 84% | 38,218 psi | 61% | 2448 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 86% | 44,338 psi | 71% | 2520 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 48,254 psi | 77% | 2566 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,761 psi | 46% | 2211 fps | 96.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,266 psi | 71% | 2543 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 40,001 psi | 64% | 2507 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,789 psi | 43% | 1440 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,282 psi | 74% | 2520 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 48,196 psi | 77% | 2546 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,757 psi | 69% | 2448 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,947 psi | 72% | 2467 fps | 96.9% |
| IMR 4350 | <<locked>> | 88% | 41,075 psi | 66% | 2448 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 39,929 psi | 64% | 2402 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 30,139 psi | 48% | 2254 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 44,498 psi | 71% | 2526 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 49,850 psi | 80% | 2556 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,108 psi | 76% | 2530 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,224 psi | 76% | 2487 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 42,540 psi | 68% | 2448 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 35,012 psi | 56% | 2303 fps | 95.6% |
| Lovex S070 | <<locked>> | 84% | 37,710 psi | 60% | 2382 fps | 95.2% |
| Lovex S071 | <<locked>> | 98% | 34,664 psi | 56% | 2365 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 46,644 psi | 75% | 2503 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,094 psi | 76% | 2507 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,786 psi | 69% | 2490 fps | 99.6% |
| Norma 204 | <<locked>> | 92% | 46,601 psi | 75% | 2585 fps | 95.5% |
| Norma MRP | <<locked>> | 96% | 41,046 psi | 66% | 2582 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 31,488 psi | 50% | 2297 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 42,293 psi | 68% | 2500 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 84% | 34,954 psi | 56% | 2382 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 49,647 psi | 80% | 2572 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,197 psi | 79% | 2585 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,122 psi | 43% | 1473 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,321 psi | 66% | 2434 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,992 psi | 74% | 2602 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,318 psi | 60% | 2484 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 30,763 psi | 49% | 2306 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 32,996 psi | 53% | 2365 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 50,647 psi | 81% | 2530 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,396 psi | 71% | 2461 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 37,913 psi | 61% | 2395 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 98% | 50,531 psi | 81% | 2615 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 96% | 43,656 psi | 70% | 2559 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 84% | 40,843 psi | 65% | 2418 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,012 psi | 56% | 2303 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,108 psi | 76% | 2530 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,540 psi | 68% | 2448 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 37,710 psi | 60% | 2382 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,812 psi | 62% | 2441 fps | 99% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,124 psi | 77% | 2549 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,122 psi | 74% | 2526 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,892 psi | 77% | 2451 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,118 psi | 64% | 2329 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 39,044 psi | 63% | 2352 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 43,265 psi | 69% | 2556 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 47,456 psi | 76% | 2451 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,805 psi | 77% | 2543 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 38,566 psi | 62% | 2395 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 28,239 psi | 45% | 2254 fps | 97.9% |
| Somchem S385 | <<locked>> | 94% | 41,582 psi | 67% | 2493 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 48,341 psi | 78% | 2438 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,280 psi | 71% | 2434 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,657 psi | 72% | 2448 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,738 psi | 59% | 2336 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 32,866 psi | 53% | 2300 fps | 96.2% |
| Vihtavuori N530 | <<locked>> | 80% | 49,777 psi | 80% | 2549 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,917 psi | 69% | 2438 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,213 psi | 52% | 2297 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 86% | 29,385 psi | 47% | 2293 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,372 psi | 52% | 2274 fps | 98.1% |
| Winchester 748 | <<locked>> | 80% | 49,995 psi | 80% | 2595 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 38,218 psi | 61% | 2448 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,383 psi | 44% | 2303 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,876 psi | 74% | 2533 fps | 100% |
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 | 140gr | Hornady A-Tip. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,812 fps; across all powders the maximum-charge window runs from 1,614 fps to 2,812 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 57–90 %, leaving at least 10 % headroom. The 140.0 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.