Load Specifications
Load data in caliber 6.5 x 64 Brenneke with .263 | 139gr | Prvi Partizan SP BT bullet and 78 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 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.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 53,809 psi | 86% | 2769 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 55,492 psi | 89% | 2805 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 55,201 psi | 89% | 2913 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 96% | 56,043 psi | 90% | 2910 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 82% | 53,722 psi | 86% | 2720 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,304 psi | 90% | 2858 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 96% | 53,983 psi | 87% | 2854 fps | 97.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 44,991 psi | 72% | 2684 fps | 95.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,842 psi | 64% | 2641 fps | 97.7% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 53,055 psi | 85% | 2802 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,868 psi | 88% | 2743 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,173 psi | 90% | 2858 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 53,824 psi | 86% | 2825 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,782 psi | 89% | 2844 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 53,621 psi | 86% | 2851 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,360 psi | 87% | 2828 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,154 psi | 80% | 2828 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,621 psi | 88% | 2917 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,999 psi | 90% | 2890 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 55,970 psi | 90% | 2762 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,079 psi | 74% | 2753 fps | 96.9% |
| Bofors RP5 | <<locked>> | 96% | 53,621 psi | 86% | 2851 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 54,882 psi | 88% | 2753 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,632 psi | 80% | 2776 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 82% | 56,072 psi | 90% | 2779 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 53,896 psi | 86% | 2805 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 53,156 psi | 85% | 2762 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 94% | 54,041 psi | 87% | 2799 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 52,779 psi | 85% | 2779 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 53,098 psi | 85% | 2736 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,139 psi | 79% | 2877 fps | 99% |
| Hodgdon Superformance | <<locked>> | 86% | 53,766 psi | 86% | 2838 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,825 psi | 59% | 1732 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,347 psi | 90% | 2792 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,376 psi | 90% | 2779 fps | 99.8% |
| IMR 4831 | <<locked>> | 90% | 55,825 psi | 90% | 2799 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,405 psi | 89% | 2785 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 98% | 55,114 psi | 88% | 2887 fps | 98.2% |
| Lovex S065 | <<locked>> | 86% | 53,650 psi | 86% | 2730 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 54,998 psi | 88% | 2772 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,285 psi | 82% | 2730 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 53,447 psi | 86% | 2785 fps | 98.6% |
| Norma MRP | <<locked>> | 94% | 53,330 psi | 86% | 2874 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 54,114 psi | 87% | 2789 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,854 psi | 90% | 2907 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 88% | 52,779 psi | 85% | 2792 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,853 psi | 86% | 2844 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,695 psi | 60% | 1775 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,680 psi | 89% | 2766 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 53,113 psi | 85% | 2812 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,521 psi | 89% | 2828 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 53,577 psi | 86% | 2854 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,545 psi | 79% | 2881 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 84% | 56,144 psi | 90% | 2759 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,085 psi | 87% | 2772 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 94% | 55,230 psi | 89% | 2835 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 86% | 54,882 psi | 88% | 2753 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 53,650 psi | 86% | 2730 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,998 psi | 88% | 2772 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,056 psi | 87% | 2766 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,188 psi | 90% | 2635 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,202 psi | 90% | 2730 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,766 psi | 88% | 2831 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 55,941 psi | 90% | 2756 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,695 psi | 89% | 2766 fps | 97.5% |
| Somchem S365 | <<locked>> | 90% | 54,128 psi | 87% | 2795 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,550 psi | 89% | 2805 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 53,621 psi | 86% | 2680 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,898 psi | 90% | 2782 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 55,085 psi | 88% | 2785 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 55,129 psi | 88% | 2789 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 53,229 psi | 85% | 2805 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 53,388 psi | 86% | 2867 fps | 97.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,489 psi | 84% | 2838 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,564 psi | 89% | 2749 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 53,896 psi | 86% | 2805 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,752 psi | 88% | 2956 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,651 psi | 89% | 2802 fps | 99% |
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% | 31,459 psi | 50% | 2339 fps | 95.5% |
| Accurate 4350 | <<locked>> | 80% | 42,424 psi | 68% | 2592 fps | 99.7% |
| Accurate High Country | <<locked>> | 86% | 41,684 psi | 67% | 2664 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 92% | 48,617 psi | 78% | 2785 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 50,473 psi | 81% | 2671 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,408 psi | 65% | 2569 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 90% | 44,135 psi | 71% | 2677 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 98% | 42,134 psi | 68% | 2625 fps | 95% |
| ADI AR 2225 | <<locked>> | 96% | 35,172 psi | 56% | 2523 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 38,261 psi | 61% | 2520 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,517 psi | 83% | 2694 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,712 psi | 65% | 2595 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,528 psi | 75% | 2710 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 37,898 psi | 61% | 2513 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 86% | 38,247 psi | 61% | 2562 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,211 psi | 48% | 2365 fps | 98.5% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,979 psi | 48% | 2375 fps | 95.3% |
| Alliant Reloder-26 | 48 gr | 80% | 32,518 psi | 52% | 2484 fps | 97.4% |
| Bofors RP15 | <<locked>> | 88% | 37,971 psi | 61% | 2552 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 52,199 psi | 84% | 2707 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 40,393 psi | 65% | 2641 fps | 95.1% |
| Bofors RP5 | <<locked>> | 86% | 38,247 psi | 61% | 2562 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 45,498 psi | 73% | 2595 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 94% | 40,509 psi | 65% | 2595 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 52,373 psi | 84% | 2723 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,005 psi | 71% | 2635 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 80% | 46,644 psi | 75% | 2648 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 90% | 47,152 psi | 76% | 2680 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 46,267 psi | 74% | 2664 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,348 psi | 61% | 2487 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 37,840 psi | 61% | 2625 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 43,120 psi | 69% | 2651 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,485 psi | 44% | 1545 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,075 psi | 66% | 2526 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,891 psi | 75% | 2618 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 40,524 psi | 65% | 2539 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 46,035 psi | 74% | 2625 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 90% | 42,380 psi | 68% | 2651 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 44,556 psi | 71% | 2575 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 42,859 psi | 69% | 2562 fps | 98.2% |
| Lovex S071 | <<locked>> | 84% | 30,705 psi | 49% | 2320 fps | 95.2% |
| Norma 204 | <<locked>> | 80% | 40,756 psi | 65% | 2556 fps | 95.7% |
| Norma MRP | 47.8 gr | 82% | 35,027 psi | 56% | 2513 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 41,800 psi | 67% | 2579 fps | 99.5% |
| Ramshot Grand | <<locked>> | 90% | 42,018 psi | 67% | 2657 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 40,480 psi | 65% | 2569 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 90% | 37,318 psi | 60% | 2536 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 45% | 1585 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,359 psi | 84% | 2713 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,400 psi | 79% | 2756 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,148 psi | 68% | 2608 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,567 psi | 65% | 2618 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 34,795 psi | 56% | 2543 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 49,414 psi | 79% | 2661 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 41,916 psi | 67% | 2552 fps | 95% |
| Rottweil R 905 | <<locked>> | 84% | 39,552 psi | 63% | 2549 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 45,498 psi | 73% | 2595 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,556 psi | 71% | 2575 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 42,859 psi | 69% | 2562 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,473 psi | 81% | 2710 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,763 psi | 80% | 2549 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,671 psi | 70% | 2523 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,204 psi | 63% | 2543 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 49,356 psi | 79% | 2654 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,614 psi | 73% | 2595 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 38,421 psi | 62% | 2536 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,186 psi | 56% | 2425 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 47,224 psi | 76% | 2585 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,250 psi | 69% | 2579 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 37,130 psi | 60% | 2464 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 42,453 psi | 68% | 2575 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 33,779 psi | 54% | 2441 fps | 98.5% |
| Vihtavuori N560 | 52.4 gr | 90% | 46,340 psi | 74% | 2743 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 94% | 42,917 psi | 69% | 2664 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,177 psi | 68% | 2543 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,251 psi | 71% | 2638 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,687 psi | 43% | 2356 fps | 98.2% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,465 psi | 63% | 2520 fps | 95.5% |
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 78 powders for 6.5 x 64 Brenneke loaded with the .263 | 139gr | Prvi Partizan SP BT. Winchester StaBALL HD delivers the highest muzzle velocity at 2,956 fps; across all powders the maximum-charge window runs from 1,732 fps to 2,956 fps. ADI AR 2217 gives the best case fill at 100 %, and 78 of the 78 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 139.0 gr projectile in 0.263" calls for a 1:10.5 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for 6.5 x 64 Brenneke with the .263 | 139gr | Prvi Partizan SP BT 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.