Load Specifications
Bullet:.264 | 139gr | Brenneke TOG
Bullet Manufacturer:Brenneke
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:1:9.5
Load data in caliber .260 Ackley Improved with .264 | 139gr | Brenneke TOG bullet and 104 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-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>> | 82% | 55,753 psi | 89% | 2572 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,274 psi | 89% | 2608 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 53,708 psi | 86% | 2618 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,455 psi | 73% | 2585 fps | 98.2% |
| Accurate 4064 | <<locked>> | 88% | 55,114 psi | 88% | 2651 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,448 psi | 89% | 2753 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 54,969 psi | 88% | 2684 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,028 psi | 90% | 2684 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,156 psi | 85% | 2730 fps | 97.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,853 psi | 86% | 2631 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,085 psi | 88% | 2602 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,853 psi | 88% | 2802 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,736 psi | 85% | 2726 fps | 97.2% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,736 psi | 85% | 2726 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,304 psi | 90% | 2703 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,417 psi | 86% | 2680 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 56,086 psi | 90% | 2799 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 53,838 psi | 86% | 2782 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,953 psi | 83% | 2717 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,236 psi | 69% | 2615 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,971 psi | 61% | 2523 fps | 96.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,704 psi | 78% | 2782 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,955 psi | 88% | 2703 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 53,505 psi | 86% | 2674 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 53,374 psi | 86% | 2651 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,521 psi | 89% | 2615 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 53,359 psi | 86% | 2661 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,491 psi | 87% | 2694 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 94% | 54,389 psi | 87% | 2749 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 92% | 54,534 psi | 87% | 2707 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 84% | 55,593 psi | 89% | 2690 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 56,246 psi | 90% | 2726 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,303 psi | 89% | 2726 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,360 psi | 87% | 2782 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,911 psi | 58% | 1631 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,345 psi | 86% | 2648 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 56,159 psi | 90% | 2671 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,405 psi | 89% | 2667 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,274 psi | 89% | 2654 fps | 98.8% |
| IMR 4350 | <<locked>> | 96% | 53,795 psi | 86% | 2680 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,274 psi | 89% | 2684 fps | 98.8% |
| IMR 4831 | <<locked>> | 98% | 55,811 psi | 89% | 2743 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 54,781 psi | 88% | 2707 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 53,853 psi | 86% | 2631 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,259 psi | 89% | 2661 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,302 psi | 87% | 2612 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,477 psi | 89% | 2661 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,013 psi | 88% | 2680 fps | 99.6% |
| Lovex S070 | <<locked>> | 96% | 55,898 psi | 90% | 2713 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,855 psi | 61% | 2444 fps | 96.3% |
| Norma 201 | <<locked>> | 84% | 53,809 psi | 86% | 2628 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,389 psi | 87% | 2628 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,130 psi | 90% | 2717 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,563 psi | 87% | 2733 fps | 97.3% |
| Norma MRPᴾ | <<locked>> | 100% | 48,370 psi | 78% | 2740 fps | 97.9% |
| Norma URP | <<locked>> | 96% | 54,157 psi | 87% | 2736 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 53,098 psi | 85% | 2694 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 53,011 psi | 85% | 2736 fps | 99.3% |
| Ramshot TAC | <<locked>> | 82% | 53,983 psi | 87% | 2657 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,664 psi | 86% | 2671 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,506 psi | 59% | 1670 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,563 psi | 87% | 2677 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 53,853 psi | 86% | 2743 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 53,693 psi | 86% | 2779 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,868 psi | 88% | 2769 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,201 psi | 87% | 2802 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 54,839 psi | 88% | 2608 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,302 psi | 87% | 2628 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 53,751 psi | 86% | 2671 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 54,897 psi | 88% | 2703 fps | 96.4% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,010 psi | 82% | 2703 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 92% | 53,374 psi | 86% | 2651 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,013 psi | 88% | 2680 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,259 psi | 89% | 2661 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,477 psi | 89% | 2661 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,898 psi | 90% | 2713 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,158 psi | 88% | 2726 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 56,072 psi | 90% | 2687 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 53,316 psi | 85% | 2657 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,114 psi | 88% | 2566 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,463 psi | 89% | 2566 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,056 psi | 88% | 2635 fps | 98.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,517 psi | 81% | 2697 fps | 97% |
| Somchem S335 | <<locked>> | 84% | 54,534 psi | 87% | 2566 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,014 psi | 90% | 2677 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 53,737 psi | 86% | 2664 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 56,101 psi | 90% | 2782 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,692 psi | 83% | 2684 fps | 97.9% |
| Vihtavuori N133 | <<locked>> | 84% | 55,506 psi | 89% | 2549 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,288 psi | 87% | 2592 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,969 psi | 88% | 2608 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,940 psi | 88% | 2641 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 53,113 psi | 85% | 2680 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 44,498 psi | 71% | 2549 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 82% | 54,230 psi | 87% | 2631 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 52,924 psi | 85% | 2605 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,550 psi | 89% | 2736 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,080 psi | 77% | 2687 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,420 psi | 90% | 2703 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,433 psi | 87% | 2677 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,389 psi | 87% | 2749 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,696 psi | 62% | 2644 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,548 psi | 86% | 2667 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 48,704 psi | 78% | 2625 fps | 96.2% |
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% | 52,649 psi | 84% | 2533 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,600 psi | 73% | 2477 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,150 psi | 71% | 2461 fps | 96% |
| Accurate 3100 | <<locked>> | 92% | 34,853 psi | 56% | 2382 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 43,192 psi | 69% | 2477 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,865 psi | 51% | 2326 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 80% | 48,472 psi | 78% | 2585 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 41,321 psi | 66% | 2448 fps | 99% |
| ADI AR 2209 | <<locked>> | 96% | 46,659 psi | 75% | 2621 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,517 psi | 81% | 2585 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,880 psi | 83% | 2562 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,701 psi | 72% | 2638 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 43,816 psi | 70% | 2572 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 43,816 psi | 70% | 2572 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,408 psi | 66% | 2474 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,121 psi | 71% | 2530 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,053 psi | 51% | 2339 fps | 96.3% |
| Alliant Reloder-17 | 37.4 gr | 80% | 35,824 psi | 57% | 2461 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 96% | 46,079 psi | 74% | 2618 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,310 psi | 42% | 2208 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 98% | 35,636 psi | 57% | 2467 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 88% | 31,836 psi | 51% | 2418 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,805 psi | 77% | 2595 fps | 99.6% |
| Bofors RP3 | <<locked>> | 80% | 41,104 psi | 66% | 2477 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 41,684 psi | 67% | 2451 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,170 psi | 84% | 2569 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,125 psi | 80% | 2615 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,785 psi | 67% | 2484 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 84% | 38,972 psi | 62% | 2480 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 84% | 42,308 psi | 68% | 2500 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 48,950 psi | 78% | 2595 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,588 psi | 47% | 2247 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,237 psi | 73% | 2575 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 41,089 psi | 66% | 2549 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,789 psi | 43% | 1457 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,934 psi | 75% | 2549 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 49,124 psi | 79% | 2579 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,439 psi | 70% | 2477 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,847 psi | 74% | 2503 fps | 97.3% |
| IMR 4350 | <<locked>> | 86% | 39,494 psi | 63% | 2431 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,232 psi | 61% | 2382 fps | 95% |
| IMR 4831 | <<locked>> | 80% | 31,009 psi | 50% | 2290 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 45,194 psi | 72% | 2556 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 50,517 psi | 81% | 2585 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,153 psi | 77% | 2562 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,254 psi | 77% | 2520 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 43,584 psi | 70% | 2480 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 35,911 psi | 58% | 2339 fps | 96% |
| Lovex S070 | <<locked>> | 84% | 38,508 psi | 62% | 2415 fps | 95.6% |
| Lovex S071 | <<locked>> | 98% | 35,650 psi | 57% | 2398 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 47,688 psi | 76% | 2539 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,196 psi | 77% | 2539 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,468 psi | 70% | 2520 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 44,498 psi | 71% | 2566 fps | 95% |
| Norma MRP | <<locked>> | 94% | 39,465 psi | 63% | 2566 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 32,082 psi | 51% | 2326 fps | 96% |
| Ramshot Big Game | <<locked>> | 80% | 43,482 psi | 70% | 2539 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 35,636 psi | 57% | 2415 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 50,459 psi | 81% | 2605 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,430 psi | 81% | 2621 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,122 psi | 43% | 1490 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,148 psi | 68% | 2470 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,108 psi | 76% | 2638 fps | 99.8% |
| ReloadSwiss RS 60 | 37.4 gr | 80% | 38,116 psi | 61% | 2516 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,546 psi | 51% | 2339 fps | 95.6% |
| ReloadSwiss RS 70 | 38.9 gr | 82% | 33,634 psi | 54% | 2398 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 51,866 psi | 83% | 2569 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,469 psi | 73% | 2497 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,624 psi | 62% | 2425 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 98% | 51,430 psi | 82% | 2651 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 96% | 44,585 psi | 71% | 2595 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 84% | 41,684 psi | 67% | 2451 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,911 psi | 58% | 2339 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,153 psi | 77% | 2562 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,584 psi | 70% | 2480 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 38,508 psi | 62% | 2415 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,726 psi | 64% | 2474 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,023 psi | 79% | 2582 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,065 psi | 75% | 2559 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,718 psi | 78% | 2480 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,814 psi | 65% | 2359 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,289 psi | 60% | 2333 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 44,193 psi | 71% | 2589 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 48,501 psi | 78% | 2484 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,675 psi | 78% | 2572 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 39,523 psi | 63% | 2431 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 28,819 psi | 46% | 2283 fps | 98.2% |
| Somchem S385 | <<locked>> | 92% | 39,813 psi | 64% | 2474 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 49,139 psi | 79% | 2467 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,136 psi | 72% | 2464 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,353 psi | 73% | 2474 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,420 psi | 60% | 2365 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 33,460 psi | 54% | 2329 fps | 96.5% |
| Vihtavuori N165 | <<locked>> | 98% | 41,989 psi | 67% | 2507 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 50,807 psi | 81% | 2582 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,830 psi | 70% | 2470 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,054 psi | 53% | 2329 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 84% | 28,398 psi | 46% | 2280 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,982 psi | 53% | 2303 fps | 98.4% |
| Winchester 748 | <<locked>> | 80% | 51,010 psi | 82% | 2631 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 38,972 psi | 62% | 2480 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 88% | 26,353 psi | 42% | 2280 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,818 psi | 75% | 2566 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 45,136 psi | 72% | 2566 fps | 95.3% |
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 104 powders for .260 Ackley Improved loaded with the .264 | 139gr | Brenneke TOG. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,802 fps; across all powders the maximum-charge window runs from 1,631 fps to 2,802 fps. Accurate 3100 gives the best case fill at 100 %, and 104 of the 104 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 1:9.5 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, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .260 Ackley Improved with the .264 | 139gr | Brenneke TOG 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.