Load Specifications
Load data in caliber 6.5 x 64 Brenneke with .263 | 139gr | Prvi Partizan FMJ BT bullet and 77 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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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 53,417 psi | 86% | 2762 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 55,317 psi | 89% | 2802 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 54,766 psi | 88% | 2904 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 96% | 55,651 psi | 89% | 2904 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 53,592 psi | 86% | 2717 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,883 psi | 90% | 2848 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 53,635 psi | 86% | 2848 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,581 psi | 63% | 2635 fps | 97.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 56,144 psi | 90% | 2844 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,708 psi | 88% | 2740 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,072 psi | 90% | 2854 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 53,316 psi | 85% | 2818 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,405 psi | 89% | 2838 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 96% | 53,214 psi | 85% | 2844 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 53,969 psi | 87% | 2822 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,835 psi | 80% | 2822 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,157 psi | 87% | 2910 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,637 psi | 89% | 2881 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 55,506 psi | 89% | 2753 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,759 psi | 73% | 2746 fps | 96.8% |
| Bofors RP5 | <<locked>> | 96% | 53,214 psi | 85% | 2844 fps | 98.8% |
| Bofors RP7 | <<locked>> | 86% | 54,810 psi | 88% | 2749 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,356 psi | 79% | 2772 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 82% | 55,651 psi | 89% | 2772 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 53,447 psi | 86% | 2795 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 53,069 psi | 85% | 2759 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 94% | 53,664 psi | 86% | 2792 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,275 psi | 90% | 2831 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,217 psi | 90% | 2779 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,776 psi | 78% | 2871 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 86% | 53,635 psi | 86% | 2835 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,811 psi | 59% | 1732 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,970 psi | 90% | 2785 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,246 psi | 90% | 2776 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 55,709 psi | 89% | 2792 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,998 psi | 88% | 2779 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 98% | 55,013 psi | 88% | 2884 fps | 98.2% |
| Lovex S065 | <<locked>> | 86% | 53,243 psi | 85% | 2720 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 54,534 psi | 87% | 2762 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,894 psi | 82% | 2723 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 53,345 psi | 86% | 2785 fps | 98.6% |
| Norma MRP | <<locked>> | 94% | 52,924 psi | 85% | 2867 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 53,679 psi | 86% | 2782 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,448 psi | 89% | 2900 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 90% | 56,101 psi | 90% | 2841 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,505 psi | 86% | 2838 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,666 psi | 60% | 1775 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,550 psi | 89% | 2762 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 52,982 psi | 85% | 2808 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,085 psi | 88% | 2825 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 53,432 psi | 86% | 2851 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,240 psi | 79% | 2871 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 55,709 psi | 89% | 2753 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 53,998 psi | 87% | 2766 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 94% | 54,824 psi | 88% | 2825 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 54,810 psi | 88% | 2749 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 53,243 psi | 85% | 2720 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 54,534 psi | 87% | 2762 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 53,621 psi | 86% | 2759 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,086 psi | 90% | 2635 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,115 psi | 90% | 2726 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,375 psi | 87% | 2822 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 55,477 psi | 89% | 2746 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,332 psi | 89% | 2759 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 53,635 psi | 86% | 2789 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,492 psi | 89% | 2805 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 53,200 psi | 85% | 2671 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,767 psi | 89% | 2779 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,679 psi | 88% | 2779 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 54,737 psi | 88% | 2782 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 53,113 psi | 85% | 2802 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 52,982 psi | 85% | 2858 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,170 psi | 84% | 2831 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,143 psi | 88% | 2743 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 53,766 psi | 86% | 2802 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,317 psi | 87% | 2949 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,245 psi | 89% | 2795 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% | 31,125 psi | 50% | 2329 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 42,003 psi | 67% | 2582 fps | 99.6% |
| Accurate High Country | <<locked>> | 86% | 41,307 psi | 66% | 2654 fps | 95% |
| Accurate MAGPRO | 54.3 gr | 92% | 48,211 psi | 77% | 2779 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 50,357 psi | 81% | 2664 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,321 psi | 65% | 2566 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 90% | 43,801 psi | 70% | 2667 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 96% | 34,925 psi | 56% | 2516 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 40,712 psi | 65% | 2569 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,343 psi | 82% | 2690 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,538 psi | 65% | 2592 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,398 psi | 74% | 2710 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 40,292 psi | 65% | 2566 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 86% | 38,130 psi | 61% | 2559 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,052 psi | 48% | 2362 fps | 98.5% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,878 psi | 48% | 2372 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 32,387 psi | 52% | 2480 fps | 97.3% |
| Bofors RP15 | <<locked>> | 90% | 40,161 psi | 64% | 2602 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 52,069 psi | 83% | 2703 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 40,074 psi | 64% | 2631 fps | 95% |
| Bofors RP5 | <<locked>> | 86% | 38,130 psi | 61% | 2559 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 45,353 psi | 73% | 2589 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 94% | 40,219 psi | 64% | 2589 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 52,199 psi | 84% | 2720 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,859 psi | 70% | 2628 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 46,514 psi | 75% | 2644 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 90% | 47,065 psi | 75% | 2680 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,934 psi | 74% | 2657 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,174 psi | 61% | 2484 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 37,739 psi | 61% | 2621 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 43,004 psi | 69% | 2648 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,644 psi | 44% | 1549 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,959 psi | 66% | 2523 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,760 psi | 75% | 2618 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 40,118 psi | 64% | 2533 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,672 psi | 73% | 2615 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 92% | 44,846 psi | 72% | 2700 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 44,425 psi | 71% | 2569 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 42,496 psi | 68% | 2552 fps | 98.1% |
| Lovex S071 | <<locked>> | 84% | 30,560 psi | 49% | 2313 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 40,654 psi | 65% | 2552 fps | 95.7% |
| Norma MRP | 47.5 gr | 82% | 34,693 psi | 56% | 2503 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 41,408 psi | 66% | 2572 fps | 99.5% |
| Ramshot Grand | <<locked>> | 90% | 41,684 psi | 67% | 2648 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 40,379 psi | 65% | 2566 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 90% | 37,231 psi | 60% | 2533 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,239 psi | 45% | 1585 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,953 psi | 83% | 2707 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,197 psi | 79% | 2753 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,989 psi | 67% | 2605 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,205 psi | 64% | 2612 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 34,548 psi | 55% | 2536 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 48,950 psi | 78% | 2651 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,599 psi | 72% | 2602 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 84% | 39,407 psi | 63% | 2546 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 45,353 psi | 73% | 2589 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,425 psi | 71% | 2569 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 80% | 42,496 psi | 68% | 2552 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,357 psi | 81% | 2710 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,632 psi | 80% | 2546 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,308 psi | 69% | 2516 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,059 psi | 63% | 2539 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 49,211 psi | 79% | 2651 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,542 psi | 73% | 2595 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 38,261 psi | 61% | 2533 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,070 psi | 56% | 2421 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 46,804 psi | 75% | 2575 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,830 psi | 69% | 2569 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 37,028 psi | 59% | 2461 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 42,337 psi | 68% | 2572 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 33,620 psi | 54% | 2434 fps | 98.5% |
| Vihtavuori N560 | 52.2 gr | 90% | 46,238 psi | 74% | 2740 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 96% | 45,730 psi | 73% | 2717 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,829 psi | 67% | 2536 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,859 psi | 70% | 2628 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,585 psi | 43% | 2352 fps | 98.1% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,305 psi | 63% | 2513 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 77 powders for 6.5 x 64 Brenneke loaded with the .263 | 139gr | Prvi Partizan FMJ BT. Winchester StaBALL HD delivers the highest muzzle velocity at 2,949 fps; across all powders the maximum-charge window runs from 1,732 fps to 2,949 fps. ADI AR 2225 gives the best case fill at 100 %, and 77 of the 77 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 1:10.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP15 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 x 64 Brenneke with the .263 | 139gr | Prvi Partizan FMJ 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.