Load Specifications
Bullet:.264 | 140gr | Speer Hot-Cor
Bullet Manufacturer:Speer
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:1:10.5
Load data in caliber .260 Ackley Improved with .264 | 140gr | Speer Hot-Cor bullet and 105 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-16 and Hodgdon Superformance.
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 2495 | <<locked>> | 84% | 52,924 psi | 85% | 2572 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,563 psi | 87% | 2628 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,065 psi | 75% | 2608 fps | 98.6% |
| Accurate 4064 | <<locked>> | 86% | 53,214 psi | 85% | 2625 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 52,852 psi | 85% | 2710 fps | 99.9% |
| Accurate High Countryᴾ | <<locked>> | 100% | 51,039 psi | 82% | 2785 fps | 96.3% |
| ADI AR 2206H | <<locked>> | 84% | 56,043 psi | 90% | 2694 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,969 psi | 87% | 2654 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,317 psi | 87% | 2746 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,868 psi | 88% | 2641 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,289 psi | 90% | 2822 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 54,302 psi | 87% | 2746 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,273 psi | 87% | 2674 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,462 psi | 87% | 2690 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 53,925 psi | 86% | 2766 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,259 psi | 89% | 2795 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,563 psi | 86% | 2740 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 46,804 psi | 75% | 2677 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,382 psi | 71% | 2631 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,856 psi | 62% | 2543 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,299 psi | 81% | 2805 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,898 psi | 90% | 2713 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 54,984 psi | 88% | 2690 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 46,804 psi | 75% | 2677 fps | 96.4% |
| Bofors RP7 | <<locked>> | 92% | 54,665 psi | 88% | 2671 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,188 psi | 90% | 2618 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,433 psi | 87% | 2671 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,521 psi | 89% | 2703 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 94% | 55,695 psi | 89% | 2766 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 92% | 55,840 psi | 90% | 2726 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 82% | 53,272 psi | 85% | 2654 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 53,998 psi | 87% | 2694 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 52,939 psi | 85% | 2690 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,927 psi | 90% | 2802 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,882 psi | 58% | 1631 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,389 psi | 87% | 2657 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 53,809 psi | 86% | 2635 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 53,359 psi | 86% | 2635 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,217 psi | 90% | 2667 fps | 99.1% |
| IMR 4350 | <<locked>> | 96% | 54,998 psi | 88% | 2697 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,173 psi | 90% | 2694 fps | 99% |
| IMR 4831 | <<locked>> | 96% | 53,664 psi | 86% | 2707 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 55,883 psi | 90% | 2720 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 54,056 psi | 87% | 2680 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 82% | 54,868 psi | 88% | 2641 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,391 psi | 90% | 2671 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,303 psi | 89% | 2625 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 53,476 psi | 86% | 2631 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,927 psi | 90% | 2690 fps | 99.7% |
| Lovex S070 | <<locked>> | 94% | 53,751 psi | 86% | 2680 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,015 psi | 63% | 2464 fps | 96.9% |
| Norma 201 | <<locked>> | 84% | 54,926 psi | 88% | 2641 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,521 psi | 89% | 2638 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,708 psi | 86% | 2677 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,825 psi | 90% | 2749 fps | 97.7% |
| Norma MRPᴾ | <<locked>> | 100% | 49,501 psi | 79% | 2756 fps | 98.3% |
| Norma URP | <<locked>> | 96% | 55,564 psi | 89% | 2753 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 54,462 psi | 87% | 2707 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,288 psi | 87% | 2753 fps | 99.5% |
| Ramshot TAC | <<locked>> | 82% | 54,911 psi | 88% | 2667 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,056 psi | 88% | 2684 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,477 psi | 58% | 1670 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,434 psi | 89% | 2687 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,448 psi | 89% | 2759 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,723 psi | 88% | 2789 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,318 psi | 90% | 2785 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,361 psi | 89% | 2815 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 55,999 psi | 90% | 2618 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,361 psi | 89% | 2638 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,839 psi | 88% | 2680 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 56,144 psi | 90% | 2720 fps | 96.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,301 psi | 84% | 2720 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 92% | 54,665 psi | 88% | 2671 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,927 psi | 90% | 2690 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,391 psi | 90% | 2671 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 53,476 psi | 86% | 2631 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,751 psi | 86% | 2680 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 52,779 psi | 85% | 2690 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,621 psi | 86% | 2651 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,650 psi | 88% | 2671 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,811 psi | 89% | 2572 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 53,359 psi | 86% | 2536 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,883 psi | 90% | 2644 fps | 99% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,808 psi | 83% | 2713 fps | 97.4% |
| Somchem S335 | <<locked>> | 84% | 55,593 psi | 89% | 2575 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 53,200 psi | 85% | 2638 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,752 psi | 88% | 2674 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 53,940 psi | 86% | 2749 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,895 psi | 85% | 2697 fps | 98.3% |
| Vihtavuori N133 | <<locked>> | 84% | 56,217 psi | 90% | 2556 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,535 psi | 89% | 2598 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,028 psi | 90% | 2618 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,318 psi | 90% | 2654 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,143 psi | 87% | 2694 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,876 psi | 74% | 2572 fps | 96.5% |
| Vihtavuori N530 | <<locked>> | 82% | 55,259 psi | 89% | 2641 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,244 psi | 87% | 2618 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 53,447 psi | 86% | 2703 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,472 psi | 79% | 2703 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,070 psi | 87% | 2671 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,521 psi | 89% | 2687 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,695 psi | 89% | 2766 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,682 psi | 64% | 2664 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,563 psi | 87% | 2677 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 49,792 psi | 80% | 2641 fps | 96.7% |
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% | 46,456 psi | 74% | 2484 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,005 psi | 72% | 2477 fps | 96.5% |
| Accurate 3100 | <<locked>> | 92% | 35,694 psi | 57% | 2395 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 43,961 psi | 70% | 2487 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,793 psi | 53% | 2346 fps | 96.7% |
| Accurate High Country | <<locked>> | 98% | 47,776 psi | 77% | 2730 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 49,516 psi | 79% | 2598 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,003 psi | 67% | 2457 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 94% | 44,788 psi | 72% | 2585 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,590 psi | 83% | 2595 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,730 psi | 73% | 2651 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 44,585 psi | 71% | 2585 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,148 psi | 68% | 2484 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,107 psi | 72% | 2546 fps | 99.7% |
| Alliant Reloder-16 | 35.3 gr | 80% | 32,851 psi | 53% | 2359 fps | 96.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,680 psi | 59% | 2477 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 44,019 psi | 71% | 2575 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 43,918 psi | 70% | 2621 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,963 psi | 43% | 2228 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 96% | 34,360 psi | 55% | 2434 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 88% | 32,779 psi | 53% | 2441 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,124 psi | 79% | 2612 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 42,119 psi | 68% | 2490 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 43,918 psi | 70% | 2621 fps | 95.6% |
| Bofors RP7 | <<locked>> | 82% | 39,929 psi | 64% | 2415 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,200 psi | 85% | 2579 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,155 psi | 82% | 2625 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,714 psi | 68% | 2497 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 37,434 psi | 60% | 2444 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 84% | 43,207 psi | 69% | 2513 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 50,009 psi | 80% | 2605 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,168 psi | 48% | 2260 fps | 97.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,282 psi | 74% | 2589 fps | 100% |
| Hodgdon Superformance | 42.1 gr | 84% | 38,972 psi | 62% | 2503 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,890 psi | 43% | 1457 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,935 psi | 77% | 2562 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 50,372 psi | 81% | 2589 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,106 psi | 71% | 2487 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,731 psi | 75% | 2516 fps | 97.6% |
| IMR 4350 | <<locked>> | 86% | 40,350 psi | 65% | 2448 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,073 psi | 63% | 2398 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 31,908 psi | 51% | 2306 fps | 96.4% |
| IMR 4895 | <<locked>> | 80% | 46,238 psi | 74% | 2572 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 98% | 50,807 psi | 81% | 2631 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 51,590 psi | 83% | 2595 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,284 psi | 79% | 2575 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,892 psi | 78% | 2530 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,309 psi | 71% | 2490 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 36,492 psi | 59% | 2349 fps | 96.4% |
| Lovex S070 | <<locked>> | 82% | 36,985 psi | 59% | 2379 fps | 95.3% |
| Lovex S071 | <<locked>> | 96% | 34,360 psi | 55% | 2369 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 48,443 psi | 78% | 2546 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,907 psi | 78% | 2546 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,454 psi | 71% | 2533 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 45,658 psi | 73% | 2585 fps | 95.6% |
| Norma MRP | <<locked>> | 92% | 37,768 psi | 61% | 2526 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 32,982 psi | 53% | 2343 fps | 96.6% |
| Ramshot Big Game | <<locked>> | 80% | 44,440 psi | 71% | 2552 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 34,185 psi | 55% | 2379 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 51,358 psi | 82% | 2615 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,430 psi | 82% | 2635 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,224 psi | 44% | 1493 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,047 psi | 69% | 2484 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,269 psi | 77% | 2651 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,015 psi | 63% | 2533 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,387 psi | 52% | 2356 fps | 96.1% |
| ReloadSwiss RS 70 | 38.6 gr | 80% | 32,242 psi | 52% | 2362 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 52,649 psi | 84% | 2575 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,195 psi | 74% | 2503 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,624 psi | 64% | 2438 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 96% | 49,371 psi | 79% | 2615 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 94% | 42,917 psi | 69% | 2562 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 82% | 39,929 psi | 64% | 2415 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,492 psi | 59% | 2349 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,284 psi | 79% | 2575 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,309 psi | 71% | 2490 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 36,985 psi | 59% | 2379 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,669 psi | 65% | 2490 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,980 psi | 80% | 2595 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,008 psi | 77% | 2572 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,458 psi | 79% | 2487 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,495 psi | 67% | 2365 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 38,159 psi | 61% | 2349 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 42,511 psi | 68% | 2556 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 49,197 psi | 79% | 2487 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,980 psi | 80% | 2589 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,219 psi | 64% | 2441 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 29,617 psi | 47% | 2303 fps | 98.6% |
| Somchem S385 | <<locked>> | 92% | 40,959 psi | 66% | 2497 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 49,908 psi | 80% | 2474 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,977 psi | 74% | 2474 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,369 psi | 74% | 2487 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,334 psi | 61% | 2379 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 34,360 psi | 55% | 2346 fps | 97% |
| Vihtavuori N165 | <<locked>> | 98% | 43,033 psi | 69% | 2523 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 51,895 psi | 83% | 2595 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,802 psi | 72% | 2480 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,895 psi | 54% | 2346 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 82% | 27,354 psi | 44% | 2247 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,895 psi | 54% | 2323 fps | 98.8% |
| Winchester 748 | <<locked>> | 80% | 52,112 psi | 84% | 2641 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 37,434 psi | 60% | 2444 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,324 psi | 41% | 2244 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,805 psi | 77% | 2579 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 43,265 psi | 69% | 2530 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 105 powders for .260 Ackley Improved loaded with the .264 | 140gr | Speer Hot-Cor. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,822 fps; across all powders the maximum-charge window runs from 1,631 fps to 2,822 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 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 140.0 gr projectile in 0.264" calls for a 1:10.5 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. ReloadSwiss RS 70, Alliant Reloder-16, Hodgdon Superformance rank at the top here: for .260 Ackley Improved with the .264 | 140gr | Speer Hot-Cor 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.