Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 139gr | Brenneke TOG bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 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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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 44,092 psi | 86% | 2562 fps | 98.2% |
| Accurate 4350 | <<locked>> | 88% | 46,253 psi | 90% | 2612 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 88% | 44,556 psi | 87% | 2618 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 84% | 44,846 psi | 87% | 2638 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 98% | 44,396 psi | 86% | 2635 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,626 psi | 81% | 2608 fps | 98.4% |
| Alliant Reloder-26 | <<locked>> | 94% | 43,511 psi | 85% | 2690 fps | 99.3% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,151 psi | 90% | 2671 fps | 96.3% |
| Bofors RP7 | <<locked>> | 84% | 44,991 psi | 87% | 2520 fps | 97% |
| Hodgdon H414 | <<locked>> | 86% | 45,339 psi | 88% | 2605 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 84% | 45,643 psi | 89% | 2569 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 44,672 psi | 87% | 2559 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 44,686 psi | 87% | 2625 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,129 psi | 70% | 1654 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 45,498 psi | 88% | 2552 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 84% | 46,311 psi | 90% | 2546 fps | 97.7% |
| IMR 4831 | <<locked>> | 88% | 44,034 psi | 86% | 2559 fps | 99.4% |
| Lovex S065 | <<locked>> | 86% | 46,427 psi | 90% | 2549 fps | 98.8% |
| Lovex S070 | <<locked>> | 86% | 44,309 psi | 86% | 2533 fps | 97.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,930 psi | 81% | 2523 fps | 97.8% |
| Norma MRP | <<locked>> | 96% | 46,456 psi | 90% | 2707 fps | 97.9% |
| Norma URP | <<locked>> | 88% | 45,513 psi | 88% | 2598 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 88% | 44,483 psi | 86% | 2598 fps | 98.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 43,903 psi | 85% | 2608 fps | 96.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,043 psi | 72% | 1696 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 44,498 psi | 86% | 2635 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 45,948 psi | 89% | 2631 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 44,701 psi | 87% | 2648 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 82% | 44,831 psi | 87% | 2536 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 45,890 psi | 89% | 2621 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 84% | 44,991 psi | 87% | 2520 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 86% | 46,427 psi | 90% | 2549 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 86% | 44,309 psi | 86% | 2533 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 45,977 psi | 89% | 2589 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 46,398 psi | 90% | 2448 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 45,571 psi | 89% | 2497 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,455 psi | 88% | 2615 fps | 96.3% |
| Somchem S355 | <<locked>> | 82% | 45,295 psi | 88% | 2536 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 44,237 psi | 86% | 2608 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 46,470 psi | 90% | 2602 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 84% | 46,238 psi | 90% | 2520 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 44,367 psi | 86% | 2546 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 98% | 45,919 psi | 89% | 2582 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 86% | 43,714 psi | 85% | 2549 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 94% | 43,772 psi | 85% | 2608 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 43,830 psi | 85% | 2523 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 45,687 psi | 89% | 2612 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,844 psi | 83% | 2736 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,441 psi | 90% | 2595 fps | 96.2% |
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>> | 88% | 33,663 psi | 65% | 2352 fps | 95.2% |
| Accurate 4350 | <<locked>> | 80% | 35,201 psi | 68% | 2398 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,635 psi | 67% | 2408 fps | 97.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,073 psi | 76% | 2530 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,367 psi | 49% | 2178 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,430 psi | 63% | 2388 fps | 95% |
| Alliant Reloder-26 | 43 gr | 84% | 30,647 psi | 60% | 2385 fps | 95.2% |
| Bofors RP15 | <<locked>> | 98% | 43,424 psi | 84% | 2615 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 39,610 psi | 77% | 2415 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 37,202 psi | 72% | 2441 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 82% | 43,004 psi | 84% | 2516 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,024 psi | 62% | 2306 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 82% | 38,783 psi | 75% | 2507 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,992 psi | 52% | 1476 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 40,147 psi | 78% | 2451 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,872 psi | 79% | 2444 fps | 96.4% |
| IMR 4831 | <<locked>> | 80% | 33,823 psi | 66% | 2352 fps | 97.2% |
| Lovex S065 | <<locked>> | 80% | 38,624 psi | 75% | 2402 fps | 97.2% |
| Lovex S070 | <<locked>> | 80% | 36,782 psi | 71% | 2379 fps | 95.4% |
| Lovex S071 | <<locked>> | 94% | 34,621 psi | 67% | 2375 fps | 95.6% |
| Norma MRP | 44.7 gr | 90% | 37,855 psi | 74% | 2533 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 35,201 psi | 68% | 2395 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 80% | 33,997 psi | 66% | 2375 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 98% | 40,625 psi | 79% | 2546 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,601 psi | 54% | 1512 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,524 psi | 81% | 2582 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,766 psi | 68% | 2411 fps | 97.1% |
| ReloadSwiss RS 70 | 40.6 gr | 80% | 34,171 psi | 66% | 2418 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 80% | 42,163 psi | 82% | 2490 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 92% | 43,091 psi | 84% | 2569 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 39,610 psi | 77% | 2415 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,624 psi | 75% | 2402 fps | 97.2% |
| Shooters World SW4350 | <<locked>> | 80% | 36,782 psi | 71% | 2379 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,989 psi | 83% | 2536 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,627 psi | 85% | 2405 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,739 psi | 73% | 2346 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,670 psi | 83% | 2562 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 42,612 psi | 83% | 2490 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 31,662 psi | 61% | 2356 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 38,479 psi | 75% | 2451 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 40,611 psi | 79% | 2425 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,550 psi | 71% | 2395 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 94% | 40,292 psi | 78% | 2477 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 35,955 psi | 70% | 2395 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 80% | 27,398 psi | 53% | 2244 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,781 psi | 69% | 2369 fps | 99.3% |
| Winchester 760 | <<locked>> | 80% | 37,202 psi | 72% | 2441 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,324 psi | 49% | 2251 fps | 95.5% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,294 psi | 84% | 2536 fps | 95.3% |
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 49 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 139gr | Brenneke TOG. Winchester StaBALL HD delivers the highest muzzle velocity at 2,736 fps; across all powders the maximum-charge window runs from 1,654 fps to 2,736 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 49 of the 49 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (355 MPa), the top charges use 70–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.264" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Bofors RP15, Hodgdon TrailBoss 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, ReloadSwiss RS 70, Norma MRP rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 139gr | Brenneke TOG 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.