Load Specifications
Load data in caliber 6.5-06 Ackley Improved with .264 | 128gr | TWENTY-NINE ERTP bullet and 92 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Accurate MAGPRO.
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% | 56,507 psi | 87% | 2887 fps | 99.2% |
| Accurate 3100 | <<locked>> | 98% | 55,912 psi | 86% | 2943 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 56,492 psi | 87% | 2871 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,711 psi | 89% | 2989 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 57,348 psi | 88% | 3094 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 98% | 58,218 psi | 90% | 3094 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 84% | 56,086 psi | 86% | 2904 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 58,436 psi | 90% | 3038 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 98% | 56,101 psi | 86% | 3035 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,798 psi | 60% | 2746 fps | 96.7% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 58,566 psi | 90% | 3035 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 58,566 psi | 90% | 3035 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,087 psi | 88% | 2927 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,101 psi | 88% | 2946 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 58,450 psi | 90% | 3045 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,869 psi | 86% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,769 psi | 89% | 3022 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,506 psi | 85% | 3031 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,405 psi | 87% | 3009 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,892 psi | 75% | 2949 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,753 psi | 87% | 3100 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,389 psi | 84% | 3012 fps | 98.6% |
| Bofors RP3 | <<locked>> | 84% | 58,059 psi | 89% | 2943 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,788 psi | 69% | 2867 fps | 96% |
| Bofors RP5 | <<locked>> | 98% | 55,506 psi | 85% | 3031 fps | 98.9% |
| Bofors RP7 | <<locked>> | 88% | 57,174 psi | 88% | 2936 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,124 psi | 74% | 2884 fps | 97% |
| Hodgdon H380 | <<locked>> | 84% | 58,421 psi | 90% | 2963 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,927 psi | 86% | 2986 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 55,245 psi | 85% | 2940 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 96% | 56,217 psi | 87% | 2976 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,969 psi | 85% | 2956 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,013 psi | 85% | 2910 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,819 psi | 74% | 2995 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 88% | 56,130 psi | 86% | 3022 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,637 psi | 56% | 1834 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,361 psi | 85% | 2884 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,783 psi | 89% | 2923 fps | 99.7% |
| IMR 4350 | <<locked>> | 92% | 58,465 psi | 90% | 2972 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 58,610 psi | 90% | 2959 fps | 99.7% |
| IMR 4831 | <<locked>> | 92% | 57,870 psi | 89% | 2976 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 58,610 psi | 90% | 2976 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,464 psi | 88% | 2963 fps | 97.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,377 psi | 88% | 3071 fps | 98.2% |
| Lovex S062 | <<locked>> | 82% | 55,695 psi | 86% | 2874 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,492 psi | 85% | 2904 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 56,942 psi | 88% | 2949 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,777 psi | 77% | 2848 fps | 99.5% |
| Norma 203B | <<locked>> | 82% | 56,391 psi | 87% | 2933 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,695 psi | 86% | 2969 fps | 98.6% |
| Norma MRP | <<locked>> | 96% | 55,434 psi | 85% | 3058 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 55,999 psi | 86% | 2969 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,624 psi | 89% | 2963 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 58,291 psi | 90% | 3091 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 92% | 58,566 psi | 90% | 3028 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,228 psi | 80% | 2959 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,420 psi | 58% | 1880 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 58,117 psi | 89% | 2949 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,376 psi | 85% | 2999 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 57,566 psi | 89% | 3012 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,115 psi | 86% | 3041 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,935 psi | 74% | 2986 fps | 99.2% |
| Rottweil R 902 | <<locked>> | 82% | 57,609 psi | 89% | 2887 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 58,218 psi | 90% | 2940 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,347 psi | 87% | 2953 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 96% | 57,246 psi | 88% | 3012 fps | 99% |
| Rottweil R 907 | <<locked>> | 88% | 57,174 psi | 88% | 2936 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,492 psi | 85% | 2904 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 55,695 psi | 86% | 2874 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,942 psi | 88% | 2949 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,144 psi | 86% | 2946 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 58,479 psi | 90% | 2812 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 58,639 psi | 90% | 2910 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,782 psi | 87% | 3009 fps | 99% |
| Somchem S355 | <<locked>> | 86% | 58,088 psi | 89% | 2936 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 58,320 psi | 90% | 2946 fps | 97.5% |
| Somchem S365 | <<locked>> | 92% | 56,057 psi | 86% | 2972 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,754 psi | 89% | 2986 fps | 99.5% |
| Vihtavuori N135 | <<locked>> | 82% | 58,146 psi | 89% | 2841 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 58,262 psi | 90% | 2858 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 55,680 psi | 86% | 2854 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 58,131 psi | 89% | 2963 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,334 psi | 88% | 2963 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 82% | 56,536 psi | 87% | 2854 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,421 psi | 88% | 2972 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,143 psi | 85% | 2982 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,477 psi | 85% | 3048 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,155 psi | 79% | 2956 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,798 psi | 89% | 2923 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,927 psi | 86% | 2986 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,852 psi | 81% | 3087 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 58,059 psi | 89% | 2982 fps | 99% |
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 2700 | <<locked>> | 80% | 52,997 psi | 82% | 2831 fps | 98.8% |
| Accurate 3100 | <<locked>> | 82% | 32,430 psi | 50% | 2490 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 52,895 psi | 81% | 2818 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,133 psi | 63% | 2703 fps | 99.2% |
| Accurate High Country | <<locked>> | 88% | 43,308 psi | 67% | 2838 fps | 95.1% |
| Accurate MAGPRO | 58.5 gr | 94% | 50,502 psi | 78% | 2963 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 49,516 psi | 76% | 2799 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,105 psi | 65% | 2743 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 92% | 45,948 psi | 71% | 2848 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 98% | 36,347 psi | 56% | 2680 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 39,653 psi | 61% | 2684 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 39,653 psi | 61% | 2684 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,357 psi | 78% | 2822 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,795 psi | 83% | 2897 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,479 psi | 61% | 2710 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,382 psi | 70% | 2838 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,974 psi | 65% | 2736 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 39,711 psi | 61% | 2730 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,167 psi | 45% | 2461 fps | 97.7% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,096 psi | 48% | 2530 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,502 psi | 48% | 2582 fps | 96.3% |
| Bofors RP15 | <<locked>> | 92% | 41,945 psi | 65% | 2776 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 51,097 psi | 79% | 2838 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 41,771 psi | 64% | 2805 fps | 95% |
| Bofors RP5 | <<locked>> | 88% | 39,711 psi | 61% | 2730 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 44,527 psi | 69% | 2713 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 96% | 42,163 psi | 65% | 2762 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 51,227 psi | 79% | 2851 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 42,873 psi | 66% | 2749 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 80% | 45,687 psi | 70% | 2769 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 92% | 49,066 psi | 76% | 2854 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,225 psi | 74% | 2838 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,115 psi | 57% | 2595 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,363 psi | 61% | 2795 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 41,974 psi | 65% | 2766 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,485 psi | 42% | 1640 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,112 psi | 80% | 2835 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,201 psi | 83% | 2864 fps | 99.4% |
| IMR 4350 | <<locked>> | 80% | 40,074 psi | 62% | 2638 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,890 psi | 71% | 2743 fps | 98.2% |
| IMR 4831 | <<locked>> | 80% | 39,349 psi | 61% | 2654 fps | 99% |
| IMR 4895 | <<locked>> | 80% | 55,216 psi | 85% | 2923 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 47,630 psi | 73% | 2792 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 94% | 46,963 psi | 72% | 2884 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 52,460 psi | 81% | 2828 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,337 psi | 67% | 2690 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 41,829 psi | 64% | 2677 fps | 97.6% |
| Lovex S071 | <<locked>> | 86% | 31,676 psi | 49% | 2467 fps | 95% |
| Norma 203B | <<locked>> | 80% | 53,156 psi | 82% | 2884 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,496 psi | 65% | 2726 fps | 95.7% |
| Norma MRP | 51.3 gr | 84% | 36,230 psi | 56% | 2674 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 40,669 psi | 63% | 2694 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 80% | 53,693 psi | 83% | 2904 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 43,801 psi | 67% | 2828 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 39,407 psi | 61% | 2680 fps | 97.6% |
| Ramshot Magnum | <<locked>> | 92% | 38,986 psi | 60% | 2703 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,036 psi | 43% | 1680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,865 psi | 78% | 2831 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,196 psi | 74% | 2890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,843 psi | 63% | 2720 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,305 psi | 60% | 2726 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,158 psi | 56% | 2707 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 54,302 psi | 84% | 2838 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,167 psi | 74% | 2785 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,714 psi | 67% | 2723 fps | 95% |
| Rottweil R 905 | <<locked>> | 86% | 41,133 psi | 63% | 2720 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 44,527 psi | 69% | 2713 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,337 psi | 67% | 2690 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 52,460 psi | 81% | 2828 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,829 psi | 64% | 2677 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,255 psi | 76% | 2838 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,733 psi | 75% | 2677 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,612 psi | 66% | 2638 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 40,770 psi | 63% | 2713 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 48,008 psi | 74% | 2779 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 47,616 psi | 73% | 2769 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 37,173 psi | 57% | 2651 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,666 psi | 56% | 2589 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 54,679 psi | 84% | 2795 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,882 psi | 84% | 2812 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 46,137 psi | 71% | 2707 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,061 psi | 65% | 2694 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 38,435 psi | 59% | 2621 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 53,026 psi | 82% | 2805 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,423 psi | 64% | 2694 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 32,518 psi | 50% | 2539 fps | 97.7% |
| Vihtavuori N560 | 56.2 gr | 92% | 48,182 psi | 74% | 2917 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 96% | 44,614 psi | 69% | 2835 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,930 psi | 63% | 2654 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,873 psi | 66% | 2749 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,918 psi | 40% | 2444 fps | 97% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,002 psi | 63% | 2684 fps | 95.4% |
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 92 powders for 6.5-06 Ackley Improved loaded with the .264 | 128gr | TWENTY-NINE ERTP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,100 fps; across all powders the maximum-charge window runs from 1,834 fps to 3,100 fps. ADI AR 2225 gives the best case fill at 100 %, and 92 of the 92 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 128.0 gr projectile in 0.265" calls for a 1:8.0 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. Norma MRP, Vihtavuori N560, Accurate MAGPRO rank at the top here: for 6.5-06 Ackley Improved with the .264 | 128gr | TWENTY-NINE ERTP 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.