Load Specifications
Load data in caliber 6.5-06 A-Square with .264 | 139gr | Fox Classic Hunter bullet and 98 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and Alliant Reloder-17.
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>> | 82% | 56,173 psi | 86% | 2677 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 57,580 psi | 89% | 2759 fps | 99.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,767 psi | 86% | 2808 fps | 99.9% |
| Accurate 4064 | <<locked>> | 84% | 56,608 psi | 87% | 2733 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 57,841 psi | 89% | 2848 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 58,566 psi | 90% | 2959 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 86% | 56,942 psi | 88% | 2772 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,390 psi | 85% | 2848 fps | 98.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,753 psi | 87% | 2904 fps | 98.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,840 psi | 87% | 2897 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 57,841 psi | 89% | 2792 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 58,117 psi | 89% | 2815 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,376 psi | 85% | 2858 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,550 psi | 87% | 2874 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 58,204 psi | 90% | 2887 fps | 99.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,782 psi | 86% | 2894 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,837 psi | 81% | 2822 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,527 psi | 70% | 2756 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 57,014 psi | 88% | 2966 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,923 psi | 78% | 2818 fps | 98.2% |
| Bofors RP3 | <<locked>> | 86% | 58,610 psi | 90% | 2805 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,782 psi | 86% | 2894 fps | 99% |
| Bofors RP7 | <<locked>> | 90% | 57,986 psi | 89% | 2802 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 45,150 psi | 69% | 2694 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 84% | 55,564 psi | 85% | 2779 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 56,420 psi | 87% | 2851 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 88% | 56,086 psi | 86% | 2812 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 98% | 57,058 psi | 88% | 2848 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,637 psi | 86% | 2825 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,579 psi | 86% | 2779 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,043 psi | 88% | 2812 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,614 psi | 69% | 2792 fps | 97.7% |
| Hodgdon Superformance | <<locked>> | 90% | 57,029 psi | 88% | 2894 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,564 psi | 56% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,479 psi | 88% | 2776 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,521 psi | 87% | 2756 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,274 psi | 85% | 2740 fps | 99.6% |
| IMR 4350 | <<locked>> | 92% | 55,680 psi | 86% | 2789 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,333 psi | 87% | 2779 fps | 99.6% |
| IMR 4831 | <<locked>> | 94% | 58,421 psi | 90% | 2841 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,854 psi | 86% | 2792 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 58,436 psi | 90% | 2835 fps | 97.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,940 psi | 83% | 2871 fps | 97.7% |
| Lovex S060 | <<locked>> | 82% | 57,711 psi | 89% | 2736 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 56,652 psi | 87% | 2746 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,086 psi | 86% | 2769 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 57,551 psi | 89% | 2815 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,137 psi | 71% | 2657 fps | 99.2% |
| Norma 201 | <<locked>> | 82% | 57,827 psi | 89% | 2756 fps | 100% |
| Norma 202 | <<locked>> | 82% | 58,610 psi | 90% | 2749 fps | 100% |
| Norma 203B | <<locked>> | 84% | 57,377 psi | 88% | 2802 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,347 psi | 87% | 2838 fps | 98.8% |
| Norma MRP | <<locked>> | 98% | 55,390 psi | 85% | 2917 fps | 99.7% |
| Norma URP | <<locked>> | 92% | 56,565 psi | 87% | 2835 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 58,421 psi | 90% | 2828 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,679 psi | 84% | 2894 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 92% | 55,303 psi | 85% | 2838 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,718 psi | 75% | 2769 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,101 psi | 57% | 1759 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,405 psi | 85% | 2766 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,072 psi | 86% | 2864 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 58,088 psi | 89% | 2874 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,391 psi | 87% | 2904 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,672 psi | 69% | 2789 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 84% | 58,537 psi | 90% | 2756 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,317 psi | 85% | 2756 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,145 psi | 88% | 2822 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 98% | 57,493 psi | 88% | 2874 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 90% | 57,986 psi | 89% | 2802 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,086 psi | 86% | 2769 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 56,652 psi | 87% | 2746 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 57,551 psi | 89% | 2815 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,826 psi | 87% | 2815 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,638 psi | 89% | 2785 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 58,392 psi | 90% | 2680 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,289 psi | 87% | 2641 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,927 psi | 86% | 2730 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,000 psi | 88% | 2871 fps | 99.1% |
| Somchem S335 | <<locked>> | 82% | 58,262 psi | 90% | 2680 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 58,682 psi | 90% | 2799 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 58,784 psi | 90% | 2812 fps | 97.7% |
| Somchem S365 | <<locked>> | 94% | 56,086 psi | 86% | 2835 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 58,160 psi | 89% | 2848 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 82% | 55,317 psi | 85% | 2664 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,564 psi | 85% | 2680 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,449 psi | 87% | 2726 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 58,682 psi | 90% | 2828 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,824 psi | 83% | 2772 fps | 99% |
| Vihtavuori N540 | <<locked>> | 84% | 57,522 psi | 88% | 2726 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 57,740 psi | 89% | 2835 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 54,984 psi | 85% | 2844 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,593 psi | 86% | 2913 fps | 97.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 47,442 psi | 73% | 2762 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 58,769 psi | 90% | 2799 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,782 psi | 87% | 2858 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,341 psi | 74% | 2890 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 58,088 psi | 89% | 2795 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 58,581 psi | 90% | 2848 fps | 99.1% |
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% | 52,431 psi | 81% | 2628 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,502 psi | 78% | 2651 fps | 98.6% |
| Accurate 3100 | <<locked>> | 84% | 32,024 psi | 49% | 2369 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 49,763 psi | 77% | 2638 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,319 psi | 59% | 2523 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 96% | 50,589 psi | 78% | 2831 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 47,268 psi | 73% | 2621 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 39,740 psi | 61% | 2562 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 94% | 46,369 psi | 71% | 2723 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,663 psi | 81% | 2838 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,964 psi | 74% | 2648 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,227 psi | 79% | 2717 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,231 psi | 57% | 2533 fps | 99% |
| Alliant Reloder-17 | 44.7 gr | 80% | 42,395 psi | 65% | 2651 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 39,349 psi | 61% | 2556 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 90% | 39,653 psi | 61% | 2605 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,093 psi | 42% | 2290 fps | 97% |
| Alliant Reloder-25 | <<locked>> | 88% | 30,922 psi | 48% | 2415 fps | 95.4% |
| Alliant Reloder-26 | 45.8 gr | 80% | 28,863 psi | 44% | 2392 fps | 95.3% |
| Bofors RP15 | <<locked>> | 92% | 39,131 psi | 60% | 2592 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 48,037 psi | 74% | 2654 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 39,653 psi | 61% | 2605 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 42,337 psi | 65% | 2539 fps | 97.2% |
| Hodgdon H1000 | <<locked>> | 98% | 42,380 psi | 65% | 2638 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 48,559 psi | 75% | 2671 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 40,422 psi | 62% | 2572 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 80% | 43,265 psi | 67% | 2589 fps | 96.7% |
| Hodgdon H4831 | <<locked>> | 92% | 46,311 psi | 71% | 2671 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,675 psi | 75% | 2713 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,911 psi | 54% | 2431 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,330 psi | 82% | 2759 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,204 psi | 60% | 2667 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 39,276 psi | 60% | 2582 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,282 psi | 42% | 1535 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,780 psi | 83% | 2723 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,734 psi | 77% | 2654 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,083 psi | 80% | 2690 fps | 99.3% |
| IMR 4350 | <<locked>> | 80% | 37,884 psi | 58% | 2467 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,671 psi | 67% | 2566 fps | 97.9% |
| IMR 4831 | <<locked>> | 80% | 36,796 psi | 57% | 2477 fps | 98.7% |
| IMR 4895 | <<locked>> | 80% | 52,562 psi | 81% | 2743 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 45,194 psi | 70% | 2615 fps | 95% |
| IMR 7828 SSC | <<locked>> | 94% | 44,019 psi | 68% | 2690 fps | 95.2% |
| Lovex S060 | <<locked>> | 80% | 54,404 psi | 84% | 2690 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,908 psi | 77% | 2651 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,060 psi | 63% | 2516 fps | 98.5% |
| Lovex S070 | <<locked>> | 80% | 39,363 psi | 61% | 2500 fps | 97.2% |
| Lovex S071 | <<locked>> | 88% | 31,212 psi | 48% | 2349 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 54,143 psi | 83% | 2703 fps | 100% |
| Norma 202 | <<locked>> | 80% | 55,187 psi | 85% | 2703 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,560 psi | 78% | 2703 fps | 100% |
| Norma 204 | <<locked>> | 82% | 39,943 psi | 61% | 2549 fps | 95.2% |
| Norma MRP | <<locked>> | 86% | 36,100 psi | 56% | 2552 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 38,101 psi | 59% | 2516 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 80% | 50,879 psi | 78% | 2723 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 44,005 psi | 68% | 2703 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 36,840 psi | 57% | 2503 fps | 97.1% |
| Ramshot Magnum | <<locked>> | 94% | 38,914 psi | 60% | 2579 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,586 psi | 42% | 1568 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,588 psi | 75% | 2657 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,121 psi | 69% | 2703 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,101 psi | 59% | 2539 fps | 98.7% |
| ReloadSwiss RS 70 | 45.4 gr | 80% | 36,840 psi | 57% | 2549 fps | 98.2% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 35,868 psi | 55% | 2582 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 51,561 psi | 79% | 2657 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,310 psi | 70% | 2605 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 44,150 psi | 68% | 2602 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 86% | 38,479 psi | 59% | 2536 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 42,337 psi | 65% | 2539 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,060 psi | 63% | 2516 fps | 98.5% |
| Shooters World Precision | <<locked>> | 80% | 49,908 psi | 77% | 2651 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,363 psi | 61% | 2500 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,499 psi | 72% | 2657 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,998 psi | 83% | 2736 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,926 psi | 85% | 2635 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,470 psi | 71% | 2507 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,118 psi | 62% | 2461 fps | 97.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 38,116 psi | 59% | 2533 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 54,636 psi | 84% | 2631 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 45,469 psi | 70% | 2602 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,095 psi | 74% | 2648 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 34,505 psi | 53% | 2474 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 36,564 psi | 56% | 2467 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 51,982 psi | 80% | 2618 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,330 psi | 81% | 2635 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,555 psi | 67% | 2533 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,639 psi | 61% | 2520 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 90% | 38,537 psi | 59% | 2507 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 50,517 psi | 78% | 2631 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,943 psi | 60% | 2520 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 80% | 29,979 psi | 46% | 2362 fps | 97.1% |
| Vihtavuori N560 | <<locked>> | 92% | 45,252 psi | 70% | 2730 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 98% | 44,222 psi | 68% | 2703 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,609 psi | 59% | 2487 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 40,422 psi | 62% | 2572 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,772 psi | 37% | 2257 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 54,375 psi | 84% | 2743 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,249 psi | 63% | 2566 fps | 95.8% |
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 98 powders for 6.5-06 A-Square loaded with the .264 | 139gr | Fox Classic Hunter. Alliant Reloder-26 delivers the highest muzzle velocity at 2,966 fps; across all powders the maximum-charge window runs from 1,719 fps to 2,966 fps. Accurate 3100 gives the best case fill at 100 %, and 98 of the 98 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 139.0 gr projectile in 0.264" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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. Alliant Reloder-26, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for 6.5-06 A-Square with the .264 | 139gr | Fox Classic Hunter 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.