Load Specifications
Bullet Manufacturer:TWENTY-NINE
Bullet Weight:128 gr
Bullet Diameter:0.265"
Bullet Length:<<locked>>
Caliber:6.5-06 A-Square load data
Case Length (l3):2.494"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:65.7 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:65,000 psi
Recommended Twist Rate:1:8.0
Load data in caliber 6.5-06 A-Square with .264 | 128gr | TWENTY-NINE ERTP bullet and 106 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-26 and Alliant Reloder-16.
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 2495 | <<locked>> | 84% | 58,566 psi | 90% | 2818 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,231 psi | 87% | 2841 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,128 psi | 83% | 2884 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 55,317 psi | 85% | 2825 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,028 psi | 86% | 2933 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 55,187 psi | 85% | 3028 fps | 97.4% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 56,246 psi | 87% | 3025 fps | 96.2% |
| ADI AR 2206H | <<locked>> | 82% | 57,928 psi | 89% | 2907 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,347 psi | 85% | 2858 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 57,188 psi | 88% | 2979 fps | 98.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,955 psi | 85% | 2972 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 58,784 psi | 90% | 3041 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 57,261 psi | 88% | 2976 fps | 98.4% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 57,261 psi | 88% | 2976 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,463 psi | 87% | 2884 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,420 psi | 87% | 2904 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,869 psi | 87% | 2989 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 58,305 psi | 90% | 3015 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,478 psi | 87% | 2966 fps | 98.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,838 psi | 83% | 2969 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,676 psi | 78% | 2900 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,208 psi | 68% | 2825 fps | 99% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 58,566 psi | 90% | 3104 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,812 psi | 89% | 2923 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,240 psi | 76% | 2890 fps | 97.1% |
| Bofors RP3 | <<locked>> | 86% | 57,188 psi | 88% | 2897 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,838 psi | 83% | 2969 fps | 98.1% |
| Bofors RP7 | <<locked>> | 90% | 56,594 psi | 87% | 2884 fps | 99% |
| Hodgdon H380 | <<locked>> | 86% | 57,580 psi | 89% | 2917 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 58,276 psi | 90% | 2986 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 90% | 58,073 psi | 89% | 2946 fps | 98.7% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 58,798 psi | 90% | 2976 fps | 96.9% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 57,696 psi | 89% | 2956 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 82% | 58,624 psi | 90% | 2913 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 57,130 psi | 88% | 2910 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,085 psi | 85% | 2897 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,679 psi | 84% | 2966 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,463 psi | 56% | 1791 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,854 psi | 86% | 2861 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 58,305 psi | 90% | 2890 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,653 psi | 89% | 2877 fps | 99.4% |
| IMR 4350 | <<locked>> | 94% | 57,653 psi | 89% | 2920 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 58,204 psi | 90% | 2913 fps | 99.4% |
| IMR 4831 | <<locked>> | 94% | 56,550 psi | 87% | 2927 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,914 psi | 89% | 2930 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,521 psi | 87% | 2904 fps | 96.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,214 psi | 80% | 2940 fps | 96.4% |
| Lovex D073.6 | <<locked>> | 82% | 58,465 psi | 90% | 2877 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 56,623 psi | 87% | 2828 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,187 psi | 85% | 2835 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 58,305 psi | 90% | 2910 fps | 99.9% |
| Lovex S070 | <<locked>> | 92% | 56,057 psi | 86% | 2897 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,773 psi | 69% | 2730 fps | 98.4% |
| Norma 201 | <<locked>> | 82% | 56,521 psi | 87% | 2844 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,087 psi | 88% | 2841 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,709 psi | 86% | 2887 fps | 100% |
| Norma 204 | <<locked>> | 94% | 58,566 psi | 90% | 2976 fps | 98.4% |
| Norma MRPᴾ | <<locked>> | 100% | 57,087 psi | 88% | 3054 fps | 99.5% |
| Norma URP | <<locked>> | 94% | 58,552 psi | 90% | 2972 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,681 psi | 87% | 2917 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,388 psi | 81% | 2953 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 94% | 57,348 psi | 88% | 2976 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,978 psi | 72% | 2828 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,999 psi | 57% | 1831 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,580 psi | 89% | 2904 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,696 psi | 89% | 2976 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,827 psi | 89% | 3005 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,985 psi | 86% | 2956 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 58,349 psi | 90% | 3041 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,163 psi | 66% | 2841 fps | 97.3% |
| Rottweil R 902 | <<locked>> | 84% | 57,130 psi | 88% | 2848 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,392 psi | 88% | 2897 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 58,726 psi | 90% | 2946 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 98% | 55,724 psi | 86% | 2953 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 90% | 56,594 psi | 87% | 2884 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 92% | 58,305 psi | 90% | 2910 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 58,465 psi | 90% | 2877 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 55,187 psi | 85% | 2835 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,057 psi | 86% | 2897 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,172 psi | 85% | 2900 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,231 psi | 87% | 2877 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,043 psi | 88% | 2772 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 58,131 psi | 89% | 2776 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 58,262 psi | 90% | 2864 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,245 psi | 85% | 2946 fps | 98.3% |
| Somchem S335 | <<locked>> | 82% | 56,942 psi | 88% | 2772 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 58,798 psi | 90% | 2897 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,319 psi | 88% | 2894 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 57,145 psi | 88% | 2887 fps | 96.6% |
| Somchem S365 | <<locked>> | 96% | 57,827 psi | 89% | 2972 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,492 psi | 87% | 2930 fps | 99% |
| Vihtavuori N133 | <<locked>> | 82% | 57,595 psi | 89% | 2753 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,638 psi | 89% | 2805 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,667 psi | 89% | 2818 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 58,407 psi | 90% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,840 psi | 87% | 2910 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,127 psi | 80% | 2844 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 84% | 55,883 psi | 86% | 2818 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,985 psi | 86% | 2917 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,681 psi | 87% | 2979 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 57,348 psi | 88% | 3041 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,623 psi | 87% | 2877 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 58,624 psi | 90% | 2992 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,745 psi | 70% | 2959 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,565 psi | 87% | 2884 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,594 psi | 87% | 2920 fps | 98.2% |
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 2495 | <<locked>> | 80% | 51,532 psi | 79% | 2723 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,472 psi | 76% | 2733 fps | 97.7% |
| Accurate 3100 | <<locked>> | 86% | 33,533 psi | 52% | 2490 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 48,849 psi | 75% | 2730 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,347 psi | 57% | 2595 fps | 98.1% |
| Accurate High Country | <<locked>> | 94% | 47,805 psi | 74% | 2894 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 98% | 52,214 psi | 80% | 2959 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 54,375 psi | 84% | 2851 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 46,108 psi | 71% | 2703 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 44,019 psi | 68% | 2746 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 96% | 48,008 psi | 74% | 2848 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,995 psi | 78% | 2920 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 44,208 psi | 68% | 2746 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 44,208 psi | 68% | 2746 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,717 psi | 72% | 2730 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,850 psi | 77% | 2799 fps | 100% |
| Alliant Reloder-16 | 42 gr | 80% | 36,230 psi | 56% | 2602 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,176 psi | 63% | 2730 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,700 psi | 67% | 2740 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,961 psi | 68% | 2789 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,600 psi | 41% | 2352 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,258 psi | 53% | 2589 fps | 95.9% |
| Alliant Reloder-26 | 48.7 gr | 84% | 32,561 psi | 50% | 2585 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 54,273 psi | 83% | 2871 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 43,091 psi | 66% | 2769 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 46,833 psi | 72% | 2740 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,961 psi | 68% | 2789 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 41,408 psi | 64% | 2612 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 47,297 psi | 73% | 2749 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 39,204 psi | 60% | 2641 fps | 96% |
| Hodgdon H4350 | <<locked>> | 80% | 42,032 psi | 65% | 2661 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 96% | 51,285 psi | 79% | 2854 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 50,372 psi | 77% | 2838 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 54,969 psi | 85% | 2861 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,953 psi | 52% | 2500 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,605 psi | 79% | 2844 fps | 100% |
| Hodgdon Superformance | <<locked>> | 80% | 38,218 psi | 59% | 2648 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,093 psi | 42% | 1598 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,344 psi | 81% | 2808 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,515 psi | 75% | 2736 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,778 psi | 78% | 2769 fps | 98.6% |
| IMR 4350 | <<locked>> | 82% | 39,421 psi | 61% | 2592 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,830 psi | 66% | 2644 fps | 96.9% |
| IMR 4831 | <<locked>> | 80% | 35,868 psi | 55% | 2546 fps | 97.7% |
| IMR 4895 | <<locked>> | 80% | 51,155 psi | 79% | 2828 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 50,009 psi | 77% | 2795 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 98% | 48,776 psi | 75% | 2874 fps | 95.4% |
| Lovex D073.6 | <<locked>> | 80% | 54,723 psi | 84% | 2828 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 53,113 psi | 82% | 2776 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,791 psi | 75% | 2736 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,190 psi | 62% | 2589 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 38,508 psi | 59% | 2572 fps | 96% |
| Lovex S071 | <<locked>> | 92% | 34,824 psi | 54% | 2523 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 52,953 psi | 81% | 2795 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,824 psi | 83% | 2792 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,226 psi | 76% | 2785 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,527 psi | 69% | 2733 fps | 95.5% |
| Norma MRP | <<locked>> | 88% | 37,753 psi | 58% | 2680 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 37,072 psi | 57% | 2589 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 80% | 49,501 psi | 76% | 2808 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,791 psi | 75% | 2887 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 35,984 psi | 55% | 2572 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 96% | 40,524 psi | 62% | 2700 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,644 psi | 43% | 1637 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,282 psi | 73% | 2733 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,969 psi | 83% | 2917 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,772 psi | 67% | 2785 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,883 psi | 57% | 2608 fps | 97.7% |
| ReloadSwiss RS 70 | 46 gr | 80% | 35,955 psi | 55% | 2615 fps | 97% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,132 psi | 62% | 2769 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 50,488 psi | 78% | 2746 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,208 psi | 68% | 2687 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 48,486 psi | 75% | 2776 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 90% | 42,670 psi | 66% | 2720 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 41,408 psi | 64% | 2612 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,190 psi | 62% | 2589 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 54,723 psi | 84% | 2828 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 48,791 psi | 75% | 2736 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,508 psi | 59% | 2572 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,368 psi | 70% | 2740 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,779 psi | 81% | 2825 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,708 psi | 83% | 2726 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,440 psi | 70% | 2595 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,479 psi | 61% | 2536 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 42,308 psi | 65% | 2713 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 53,476 psi | 82% | 2723 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 55,172 psi | 85% | 2844 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,425 psi | 68% | 2684 fps | 99.9% |
| Somchem S361 | <<locked>> | 92% | 50,024 psi | 77% | 2772 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 33,460 psi | 51% | 2543 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 40,611 psi | 62% | 2648 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 54,288 psi | 84% | 2710 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,763 psi | 78% | 2710 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,966 psi | 78% | 2726 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,525 psi | 65% | 2615 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,522 psi | 59% | 2589 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 92% | 39,813 psi | 61% | 2621 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 49,226 psi | 76% | 2717 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,927 psi | 58% | 2589 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 29,240 psi | 45% | 2431 fps | 95.8% |
| Vihtavuori N560 | <<locked>> | 96% | 50,154 psi | 77% | 2917 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,681 psi | 58% | 2559 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 39,204 psi | 60% | 2641 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,106 psi | 39% | 2379 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,750 psi | 81% | 2828 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 42,873 psi | 66% | 2687 fps | 95.2% |
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 106 powders for 6.5-06 A-Square loaded with the .264 | 128gr | TWENTY-NINE ERTP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,104 fps; across all powders the maximum-charge window runs from 1,791 fps to 3,104 fps. Accurate 3100 gives the best case fill at 100 %, and 106 of the 106 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. 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. ReloadSwiss RS 70, Alliant Reloder-26, Alliant Reloder-16 rank at the top here: for 6.5-06 A-Square 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.