Load Specifications
Load data in caliber 6.5 x 64 Brenneke with .264 | 140gr | Speer Grand Slam bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Accurate High Country and Alliant Reloder-26.
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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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 55,651 psi | 89% | 2792 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 53,650 psi | 86% | 2772 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 53,243 psi | 85% | 2874 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 94% | 53,969 psi | 87% | 2874 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 82% | 55,042 psi | 88% | 2733 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,244 psi | 87% | 2822 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 55,666 psi | 89% | 2881 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,340 psi | 74% | 2710 fps | 96.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,336 psi | 66% | 2674 fps | 98.4% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,505 psi | 87% | 2818 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,231 psi | 90% | 2756 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,360 psi | 87% | 2825 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,535 psi | 89% | 2841 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 53,853 psi | 86% | 2812 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,434 psi | 89% | 2877 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,347 psi | 90% | 2851 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,851 psi | 83% | 2851 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 52,663 psi | 84% | 2877 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,273 psi | 87% | 2858 fps | 99.1% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,080 psi | 77% | 2785 fps | 97.6% |
| Bofors RP5 | <<locked>> | 96% | 55,434 psi | 89% | 2877 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 56,405 psi | 90% | 2776 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,140 psi | 82% | 2802 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 86% | 55,143 psi | 88% | 2822 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 54,418 psi | 87% | 2779 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 94% | 55,724 psi | 89% | 2822 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,447 psi | 87% | 2802 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,752 psi | 88% | 2753 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,024 psi | 82% | 2910 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 86% | 55,579 psi | 89% | 2858 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,883 psi | 59% | 1736 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,128 psi | 87% | 2756 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,491 psi | 87% | 2746 fps | 99.7% |
| IMR 4831 | <<locked>> | 88% | 54,012 psi | 87% | 2766 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 53,374 psi | 86% | 2749 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 96% | 53,243 psi | 85% | 2854 fps | 98.1% |
| Lovex S065 | <<locked>> | 86% | 54,839 psi | 88% | 2743 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 52,881 psi | 85% | 2736 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,069 psi | 85% | 2753 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 54,882 psi | 88% | 2808 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 36,811 psi | 59% | 2595 fps | 96.3% |
| Norma MRP | <<locked>> | 94% | 55,216 psi | 89% | 2897 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 55,753 psi | 89% | 2808 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,867 psi | 86% | 2874 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 88% | 54,288 psi | 87% | 2808 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,912 psi | 90% | 2871 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,768 psi | 61% | 1778 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,013 psi | 88% | 2831 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 53,388 psi | 86% | 2795 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,448 psi | 89% | 2877 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,358 psi | 82% | 2907 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 54,070 psi | 87% | 2726 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,477 psi | 89% | 2792 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 92% | 53,258 psi | 85% | 2799 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 56,405 psi | 90% | 2776 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,839 psi | 88% | 2743 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 52,881 psi | 85% | 2736 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,376 psi | 89% | 2782 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,085 psi | 87% | 2605 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,215 psi | 87% | 2700 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,304 psi | 90% | 2848 fps | 99.3% |
| Somchem S355 | <<locked>> | 82% | 53,882 psi | 86% | 2720 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 53,621 psi | 86% | 2733 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 55,898 psi | 90% | 2812 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 53,911 psi | 86% | 2779 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 54,926 psi | 88% | 2694 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,056 psi | 87% | 2749 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 53,316 psi | 85% | 2756 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 86% | 53,011 psi | 85% | 2753 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,216 psi | 89% | 2828 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,172 psi | 88% | 2890 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,549 psi | 87% | 2864 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 53,287 psi | 85% | 2713 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,448 psi | 89% | 2825 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 53,171 psi | 85% | 2923 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 53,737 psi | 86% | 2769 fps | 98.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 32,358 psi | 52% | 2356 fps | 96.1% |
| Accurate 4350 | <<locked>> | 80% | 43,540 psi | 70% | 2605 fps | 99.8% |
| Accurate High Country | 51.2 gr | 86% | 43,163 psi | 69% | 2687 fps | 95.8% |
| Accurate MAGPRO | 54.6 gr | 90% | 46,920 psi | 75% | 2753 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 51,793 psi | 83% | 2687 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,957 psi | 62% | 2536 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 88% | 42,598 psi | 68% | 2641 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 98% | 43,439 psi | 70% | 2654 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 94% | 33,997 psi | 55% | 2490 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 39,363 psi | 63% | 2539 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,881 psi | 85% | 2710 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,003 psi | 67% | 2615 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,240 psi | 77% | 2733 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,986 psi | 63% | 2533 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 84% | 36,898 psi | 59% | 2526 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,038 psi | 50% | 2385 fps | 98.9% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,022 psi | 47% | 2343 fps | 95% |
| Alliant Reloder-26 | 49.1 gr | 80% | 33,794 psi | 54% | 2510 fps | 98% |
| Bofors RP15 | <<locked>> | 88% | 39,320 psi | 63% | 2579 fps | 95.7% |
| Bofors RP30 | <<locked>> | 96% | 41,959 psi | 67% | 2667 fps | 95.9% |
| Bofors RP5 | <<locked>> | 84% | 36,898 psi | 59% | 2526 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 46,688 psi | 75% | 2612 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 94% | 41,872 psi | 67% | 2625 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 45,252 psi | 73% | 2651 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 80% | 47,877 psi | 77% | 2671 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 88% | 45,469 psi | 73% | 2648 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 44,686 psi | 72% | 2631 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,639 psi | 64% | 2507 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 36,622 psi | 59% | 2592 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 44,556 psi | 71% | 2674 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,717 psi | 44% | 1552 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,206 psi | 68% | 2546 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,066 psi | 77% | 2638 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 41,510 psi | 67% | 2556 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 44,266 psi | 71% | 2589 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 90% | 43,642 psi | 70% | 2677 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 45,527 psi | 73% | 2589 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 43,816 psi | 70% | 2575 fps | 98.6% |
| Lovex S071 | <<locked>> | 84% | 31,778 psi | 51% | 2343 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 41,930 psi | 67% | 2575 fps | 96.3% |
| Norma 217 | <<locked>> | 98% | 34,534 psi | 55% | 2536 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 33,663 psi | 54% | 2474 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 42,844 psi | 69% | 2595 fps | 99.7% |
| Ramshot Grand | <<locked>> | 88% | 40,553 psi | 65% | 2625 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 41,684 psi | 67% | 2589 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 88% | 36,013 psi | 58% | 2500 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,326 psi | 45% | 1591 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,184 psi | 82% | 2776 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,424 psi | 70% | 2628 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,713 psi | 67% | 2641 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 33,489 psi | 54% | 2507 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 50,517 psi | 81% | 2671 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,033 psi | 69% | 2572 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 82% | 38,159 psi | 61% | 2516 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 46,688 psi | 75% | 2612 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,527 psi | 73% | 2589 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 43,816 psi | 70% | 2575 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,822 psi | 83% | 2726 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,082 psi | 82% | 2562 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,527 psi | 71% | 2539 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 37,811 psi | 61% | 2510 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 50,401 psi | 81% | 2667 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 43,859 psi | 70% | 2562 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 39,784 psi | 64% | 2556 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,274 psi | 58% | 2448 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 48,225 psi | 77% | 2595 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,251 psi | 71% | 2592 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 35,824 psi | 57% | 2431 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 43,627 psi | 70% | 2592 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 34,795 psi | 56% | 2457 fps | 98.9% |
| Vihtavuori N560 | <<locked>> | 88% | 44,788 psi | 72% | 2707 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 94% | 44,541 psi | 71% | 2690 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,265 psi | 69% | 2556 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,513 psi | 73% | 2657 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,572 psi | 44% | 2385 fps | 98.8% |
| Winchester Supreme 780 | <<locked>> | 84% | 37,927 psi | 61% | 2484 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 76 powders for 6.5 x 64 Brenneke loaded with the .264 | 140gr | Speer Grand Slam. Winchester StaBALL HD delivers the highest muzzle velocity at 2,923 fps; across all powders the maximum-charge window runs from 1,736 fps to 2,923 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.264" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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. Accurate MAGPRO, Accurate High Country, Alliant Reloder-26 rank at the top here: for 6.5 x 64 Brenneke with the .264 | 140gr | Speer Grand Slam 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.