Load Specifications
Bullet:.264 | 129gr | Hornady SST
Bullet Manufacturer:Hornady
Bullet Weight:129 gr
Bullet Diameter:0.264"
Bullet Length:<<locked>>
Caliber:6.5-06 Ackley Improved load data
Case Length (l3):2.489"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:72 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:64,977 psi
Recommended Twist Rate:1:8.5
Load data in caliber 6.5-06 Ackley Improved with .264 | 129gr | Hornady SST bullet and 86 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.
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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 2700 | <<locked>> | 82% | 57,856 psi | 89% | 2904 fps | 99.5% |
| Accurate 3100 | <<locked>> | 98% | 57,609 psi | 89% | 2963 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 57,812 psi | 89% | 2881 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 55,405 psi | 85% | 2949 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 55,259 psi | 85% | 3054 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 96% | 55,999 psi | 86% | 3051 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 84% | 57,246 psi | 88% | 2917 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,217 psi | 87% | 2999 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 98% | 57,624 psi | 89% | 3058 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,929 psi | 61% | 2772 fps | 97.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 56,420 psi | 87% | 2995 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 58,291 psi | 90% | 2936 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 58,610 psi | 90% | 2963 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,159 psi | 86% | 3005 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,798 psi | 89% | 3028 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,680 psi | 86% | 2986 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 98% | 57,217 psi | 88% | 3051 fps | 99.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 58,204 psi | 90% | 3025 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,401 psi | 78% | 2969 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,665 psi | 84% | 3061 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,289 psi | 87% | 3035 fps | 99% |
| Bofors RP3 | <<locked>> | 82% | 55,854 psi | 86% | 2904 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,238 psi | 71% | 2890 fps | 96.6% |
| Bofors RP5 | <<locked>> | 98% | 57,217 psi | 88% | 3051 fps | 99.2% |
| Bofors RP7 | <<locked>> | 88% | 58,566 psi | 90% | 2953 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,719 psi | 77% | 2913 fps | 97.6% |
| Hodgdon H380 | <<locked>> | 82% | 55,883 psi | 86% | 2923 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 57,377 psi | 88% | 3002 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 86% | 56,637 psi | 87% | 2959 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 96% | 57,783 psi | 89% | 2999 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,536 psi | 87% | 2976 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,507 psi | 87% | 2927 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,226 psi | 76% | 3018 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 88% | 57,827 psi | 89% | 3041 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,782 psi | 57% | 1837 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,550 psi | 87% | 2894 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,115 psi | 86% | 2930 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,318 psi | 87% | 2920 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 55,941 psi | 86% | 2940 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,332 psi | 85% | 2923 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 98% | 55,405 psi | 85% | 3035 fps | 98% |
| Lovex S062 | <<locked>> | 82% | 56,927 psi | 88% | 2887 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,884 psi | 88% | 2920 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 58,291 psi | 90% | 2966 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,445 psi | 79% | 2871 fps | 99.7% |
| Norma 203B | <<locked>> | 82% | 57,928 psi | 89% | 2949 fps | 100% |
| Norma 204 | <<locked>> | 90% | 57,290 psi | 88% | 2992 fps | 98.9% |
| Norma MRP | <<locked>> | 96% | 57,159 psi | 88% | 3077 fps | 99.8% |
| Norma URP | <<locked>> | 90% | 57,479 psi | 88% | 2986 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 58,769 psi | 90% | 2972 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,840 psi | 86% | 3051 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 56,521 psi | 87% | 2989 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,070 psi | 83% | 2986 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,565 psi | 58% | 1883 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,608 psi | 86% | 2907 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 57,087 psi | 88% | 3012 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,608 psi | 86% | 2976 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 57,522 psi | 89% | 3058 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,501 psi | 76% | 3015 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 56,028 psi | 86% | 2904 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 57,653 psi | 89% | 2966 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 94% | 55,158 psi | 85% | 2976 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 88% | 58,566 psi | 90% | 2953 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,884 psi | 88% | 2920 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 56,927 psi | 88% | 2887 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 58,291 psi | 90% | 2966 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 57,609 psi | 89% | 2963 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,217 psi | 87% | 2776 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,463 psi | 87% | 2874 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 58,523 psi | 90% | 3031 fps | 99.3% |
| Somchem S355 | <<locked>> | 84% | 55,898 psi | 86% | 2897 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,767 psi | 86% | 2904 fps | 97.3% |
| Somchem S365 | <<locked>> | 92% | 57,653 psi | 89% | 2989 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,666 psi | 86% | 2949 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 86% | 57,101 psi | 88% | 2871 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,825 psi | 86% | 2923 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,158 psi | 85% | 2927 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 57,638 psi | 89% | 2864 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 58,784 psi | 90% | 2982 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,985 psi | 88% | 3002 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 57,116 psi | 88% | 3071 fps | 97.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,721 psi | 81% | 2979 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,405 psi | 85% | 2884 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,667 psi | 89% | 3009 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,969 psi | 85% | 3104 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,709 psi | 86% | 2943 fps | 98.8% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 80% | 54,027 psi | 83% | 2844 fps | 99.1% |
| Accurate 3100 | <<locked>> | 80% | 31,372 psi | 48% | 2454 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 54,201 psi | 83% | 2828 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 42,322 psi | 65% | 2720 fps | 99.5% |
| Accurate High Country | <<locked>> | 88% | 44,657 psi | 69% | 2858 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 92% | 48,718 psi | 75% | 2923 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 50,662 psi | 78% | 2815 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,509 psi | 62% | 2700 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 90% | 44,077 psi | 68% | 2805 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 96% | 35,128 psi | 54% | 2644 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 40,872 psi | 63% | 2703 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,576 psi | 79% | 2838 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 55,013 psi | 85% | 2910 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,567 psi | 62% | 2726 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,630 psi | 72% | 2851 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 40,466 psi | 62% | 2697 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,915 psi | 63% | 2749 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,052 psi | 46% | 2484 fps | 98.2% |
| Alliant Reloder-25 | <<locked>> | 86% | 32,053 psi | 49% | 2556 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 32,430 psi | 50% | 2602 fps | 97% |
| Bofors RP15 | <<locked>> | 90% | 40,393 psi | 62% | 2736 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 52,315 psi | 81% | 2851 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 43,192 psi | 66% | 2828 fps | 95.7% |
| Bofors RP5 | <<locked>> | 88% | 40,915 psi | 63% | 2749 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 45,556 psi | 70% | 2730 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 96% | 43,395 psi | 67% | 2789 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 52,402 psi | 81% | 2867 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,961 psi | 68% | 2766 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 80% | 46,731 psi | 72% | 2785 fps | 97.6% |
| Hodgdon H4831 | <<locked>> | 90% | 47,268 psi | 73% | 2818 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 46,224 psi | 71% | 2795 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,247 psi | 59% | 2615 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 37,869 psi | 58% | 2756 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 43,250 psi | 67% | 2785 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,557 psi | 42% | 1644 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,301 psi | 82% | 2844 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,031 psi | 63% | 2654 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,920 psi | 72% | 2759 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 40,451 psi | 62% | 2671 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,021 psi | 71% | 2756 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 92% | 45,295 psi | 70% | 2844 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 53,679 psi | 83% | 2838 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,411 psi | 68% | 2707 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 42,641 psi | 66% | 2687 fps | 97.9% |
| Lovex S071 | <<locked>> | 86% | 32,837 psi | 51% | 2493 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 54,375 psi | 84% | 2894 fps | 100% |
| Norma 204 | <<locked>> | 80% | 40,698 psi | 63% | 2684 fps | 95.4% |
| Norma MRP | <<locked>> | 82% | 34,969 psi | 54% | 2635 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 41,568 psi | 64% | 2707 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 80% | 55,158 psi | 85% | 2920 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 44,976 psi | 69% | 2851 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 40,422 psi | 62% | 2700 fps | 98% |
| Ramshot Magnum | <<locked>> | 90% | 37,376 psi | 58% | 2661 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,108 psi | 43% | 1683 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,243 psi | 80% | 2851 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,458 psi | 76% | 2900 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,974 psi | 65% | 2736 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,509 psi | 62% | 2749 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 37,289 psi | 57% | 2736 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 80% | 49,110 psi | 76% | 2795 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,686 psi | 69% | 2740 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 84% | 39,653 psi | 61% | 2680 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 45,556 psi | 70% | 2730 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,411 psi | 68% | 2707 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 53,679 psi | 83% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,641 psi | 66% | 2687 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,401 psi | 78% | 2851 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,850 psi | 77% | 2687 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,555 psi | 67% | 2654 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,291 psi | 60% | 2674 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 49,182 psi | 76% | 2792 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,965 psi | 75% | 2789 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 38,348 psi | 59% | 2667 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 37,652 psi | 58% | 2605 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 46,978 psi | 72% | 2717 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,149 psi | 66% | 2710 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 37,043 psi | 57% | 2585 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 54,157 psi | 83% | 2815 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,482 psi | 65% | 2710 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 33,605 psi | 52% | 2559 fps | 98.2% |
| Vihtavuori N560 | <<locked>> | 90% | 46,514 psi | 72% | 2881 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 96% | 46,108 psi | 71% | 2858 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,076 psi | 65% | 2671 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,222 psi | 68% | 2772 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,629 psi | 41% | 2467 fps | 97.7% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,407 psi | 61% | 2644 fps | 95.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 86 powders for 6.5-06 Ackley Improved loaded with the .264 | 129gr | Hornady SST. Winchester StaBALL HD delivers the highest muzzle velocity at 3,104 fps; across all powders the maximum-charge window runs from 1,837 fps to 3,104 fps. ADI AR 2225 gives the best case fill at 100 %, and 86 of the 86 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 129.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-23, Alliant Reloder-25 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.