Load Specifications
Load data in caliber 6.5 x 64 Brenneke with .263 | 123gr | Prvi Partizan SP bullet and 86 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate High Country and Norma MRP.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 54,302 psi | 87% | 2864 fps | 98.5% |
| Accurate 3100 | <<locked>> | 98% | 52,823 psi | 85% | 2910 fps | 99.4% |
| Accurate 4064 | <<locked>> | 82% | 54,085 psi | 87% | 2858 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,027 psi | 88% | 2966 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 54,157 psi | 87% | 3054 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 84% | 53,766 psi | 86% | 2887 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,796 psi | 89% | 3009 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 98% | 53,374 psi | 86% | 2995 fps | 96.5% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 55,999 psi | 90% | 3005 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,911 psi | 88% | 2913 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,911 psi | 88% | 2933 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,477 psi | 89% | 3022 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 53,171 psi | 85% | 2989 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,230 psi | 89% | 2995 fps | 98.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,347 psi | 90% | 3054 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,142 psi | 85% | 2982 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,311 psi | 74% | 2910 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,388 psi | 86% | 3068 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,459 psi | 83% | 2972 fps | 97.4% |
| Bofors RP3 | <<locked>> | 84% | 55,796 psi | 89% | 2930 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,347 psi | 90% | 3054 fps | 98.4% |
| Bofors RP7 | <<locked>> | 88% | 54,940 psi | 88% | 2913 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 55,985 psi | 90% | 2946 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 53,229 psi | 85% | 2956 fps | 99% |
| Hodgdon H4350 | <<locked>> | 86% | 52,982 psi | 85% | 2917 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 96% | 53,461 psi | 86% | 2940 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,028 psi | 90% | 2982 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,970 psi | 90% | 2946 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,295 psi | 73% | 2940 fps | 96.7% |
| Hodgdon Superformance | <<locked>> | 88% | 53,432 psi | 86% | 2992 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,463 psi | 58% | 1841 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 53,258 psi | 85% | 2867 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,550 psi | 89% | 2900 fps | 99.2% |
| IMR 4350 | <<locked>> | 92% | 55,970 psi | 90% | 2946 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 53,171 psi | 85% | 2887 fps | 98.8% |
| IMR 4831 | <<locked>> | 92% | 55,419 psi | 89% | 2956 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,347 psi | 90% | 2959 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,187 psi | 88% | 2933 fps | 96.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,534 psi | 87% | 3031 fps | 96.9% |
| Lovex S062 | <<locked>> | 82% | 53,548 psi | 86% | 2864 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,258 psi | 85% | 2881 fps | 99.6% |
| Lovex S070 | <<locked>> | 90% | 54,636 psi | 88% | 2927 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,195 psi | 76% | 2818 fps | 98.7% |
| Norma 203B | <<locked>> | 82% | 54,244 psi | 87% | 2917 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,069 psi | 85% | 2936 fps | 97.5% |
| Norma MRP | <<locked>> | 98% | 56,173 psi | 90% | 3084 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 53,563 psi | 86% | 2949 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,853 psi | 88% | 2943 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,969 psi | 88% | 3048 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 92% | 55,869 psi | 90% | 3002 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,197 psi | 79% | 2917 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,246 psi | 60% | 1886 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,883 psi | 90% | 2930 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 52,620 psi | 84% | 2982 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,723 psi | 88% | 2986 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,127 psi | 85% | 3012 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,310 psi | 73% | 2933 fps | 97.8% |
| Rottweil R 902 | <<locked>> | 82% | 55,419 psi | 89% | 2874 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,637 psi | 89% | 2923 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,882 psi | 86% | 2920 fps | 96.7% |
| Rottweil R 905 | <<locked>> | 96% | 54,549 psi | 87% | 2982 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 88% | 54,940 psi | 88% | 2913 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,258 psi | 85% | 2881 fps | 99.6% |
| Shooters World Precision | <<locked>> | 82% | 53,548 psi | 86% | 2864 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,636 psi | 88% | 2927 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,708 psi | 86% | 2930 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 53,040 psi | 85% | 2759 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 52,794 psi | 85% | 2831 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,085 psi | 87% | 2976 fps | 98% |
| Somchem S355 | <<locked>> | 86% | 55,608 psi | 89% | 2920 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,477 psi | 89% | 2910 fps | 96.2% |
| Somchem S365 | <<locked>> | 92% | 52,982 psi | 85% | 2949 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,172 psi | 88% | 2959 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 82% | 55,738 psi | 89% | 2831 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,130 psi | 90% | 2851 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 53,301 psi | 85% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,709 psi | 89% | 2943 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,520 psi | 87% | 2933 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 82% | 54,273 psi | 87% | 2844 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,810 psi | 88% | 2949 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,724 psi | 89% | 3012 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,304 psi | 90% | 3071 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,274 psi | 89% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 53,519 psi | 86% | 2959 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,646 psi | 78% | 3048 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,187 psi | 88% | 2949 fps | 98% |
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 2700 | <<locked>> | 80% | 50,836 psi | 82% | 2808 fps | 98% |
| Accurate 3100 | <<locked>> | 86% | 35,230 psi | 56% | 2569 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 50,850 psi | 82% | 2808 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,044 psi | 63% | 2674 fps | 98.3% |
| Accurate High Country | 54.8 gr | 92% | 47,065 psi | 75% | 2923 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 47,572 psi | 76% | 2779 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 88% | 42,786 psi | 69% | 2762 fps | 95% |
| ADI AR 2213 | <<locked>> | 96% | 50,024 psi | 80% | 2936 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 43,047 psi | 69% | 2766 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,269 psi | 77% | 2805 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,634 psi | 83% | 2877 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,811 psi | 61% | 2680 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,960 psi | 69% | 2808 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,569 psi | 68% | 2759 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 92% | 43,091 psi | 69% | 2812 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,818 psi | 45% | 2425 fps | 96.1% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,591 psi | 54% | 2608 fps | 95.4% |
| Alliant Reloder-26 | 50.3 gr | 82% | 31,894 psi | 51% | 2602 fps | 95.5% |
| Bofors RP15 | <<locked>> | 94% | 42,496 psi | 68% | 2799 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 48,602 psi | 78% | 2815 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 43,091 psi | 69% | 2812 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 42,699 psi | 68% | 2684 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 80% | 48,892 psi | 78% | 2828 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 40,712 psi | 65% | 2713 fps | 96.3% |
| Hodgdon H4350 | <<locked>> | 80% | 43,555 psi | 70% | 2740 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 94% | 50,096 psi | 80% | 2881 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,504 psi | 84% | 2927 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,389 psi | 57% | 2572 fps | 98.9% |
| Hodgdon Retumbo | <<locked>> | 98% | 42,293 psi | 68% | 2871 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 39,755 psi | 64% | 2723 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,354 psi | 44% | 1647 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,053 psi | 80% | 2815 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,301 psi | 84% | 2848 fps | 98.8% |
| IMR 4350 | <<locked>> | 82% | 40,799 psi | 65% | 2664 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,106 psi | 71% | 2717 fps | 97.1% |
| IMR 4831 | <<locked>> | 80% | 37,434 psi | 60% | 2625 fps | 98% |
| IMR 4895 | <<locked>> | 80% | 52,968 psi | 85% | 2907 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 51,648 psi | 83% | 2874 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 96% | 47,645 psi | 76% | 2904 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 50,357 psi | 81% | 2812 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,771 psi | 67% | 2667 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 40,016 psi | 64% | 2648 fps | 96.3% |
| Lovex S071 | <<locked>> | 90% | 34,200 psi | 55% | 2543 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 51,024 psi | 82% | 2867 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,395 psi | 70% | 2756 fps | 95.1% |
| Norma MRP | 52.4 gr | 88% | 39,450 psi | 63% | 2762 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 38,696 psi | 62% | 2667 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 80% | 51,271 psi | 82% | 2884 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 47,718 psi | 77% | 2913 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 37,362 psi | 60% | 2648 fps | 96.2% |
| Ramshot Magnum | <<locked>> | 96% | 42,482 psi | 68% | 2785 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,876 psi | 45% | 1690 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,008 psi | 79% | 2815 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,658 psi | 73% | 2864 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,609 psi | 62% | 2687 fps | 98% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,376 psi | 60% | 2690 fps | 97.3% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 39,189 psi | 63% | 2789 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 52,127 psi | 84% | 2825 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,021 psi | 74% | 2766 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,326 psi | 76% | 2805 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 88% | 41,640 psi | 67% | 2740 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 42,699 psi | 68% | 2684 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,771 psi | 67% | 2667 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 50,357 psi | 81% | 2812 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,016 psi | 64% | 2648 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,949 psi | 75% | 2815 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,021 psi | 75% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,654 psi | 65% | 2608 fps | 96.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 44,266 psi | 71% | 2799 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 46,180 psi | 74% | 2762 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 51,909 psi | 83% | 2851 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 35,085 psi | 56% | 2618 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 39,653 psi | 64% | 2667 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 52,605 psi | 84% | 2789 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,808 psi | 85% | 2802 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,179 psi | 71% | 2690 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,132 psi | 64% | 2667 fps | 98.5% |
| Vihtavuori N165 | <<locked>> | 92% | 41,742 psi | 67% | 2703 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 50,778 psi | 81% | 2792 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,378 psi | 63% | 2664 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 80% | 30,821 psi | 49% | 2507 fps | 96.2% |
| Vihtavuori N560 | <<locked>> | 94% | 49,023 psi | 79% | 2943 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,044 psi | 63% | 2631 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 40,944 psi | 66% | 2720 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,179 psi | 42% | 2451 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 92% | 44,759 psi | 72% | 2769 fps | 95.7% |
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 86 powders for 6.5 x 64 Brenneke loaded with the .263 | 123gr | Prvi Partizan SP. Norma MRP delivers the highest muzzle velocity at 3,084 fps; across all powders the maximum-charge window runs from 1,841 fps to 3,084 fps. Alliant Reloder-22 gives the best case fill at 100 %, and 86 of the 86 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 123.0 gr projectile in 0.263" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-22, Alliant Reloder-23, 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. Alliant Reloder-26, Accurate High Country, Norma MRP rank at the top here: for 6.5 x 64 Brenneke with the .263 | 123gr | Prvi Partizan SP 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.