Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 140gr | Nosler Partition bullet and 54 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and ReloadSwiss RS 70.
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% | 44,208 psi | 86% | 2556 fps | 98.3% |
| Accurate 4350 | <<locked>> | 88% | 46,369 psi | 90% | 2605 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,672 psi | 87% | 2585 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 44,657 psi | 87% | 2612 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 84% | 44,976 psi | 87% | 2631 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,135 psi | 86% | 2579 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,193 psi | 86% | 2625 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 98% | 44,831 psi | 87% | 2631 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,771 psi | 81% | 2605 fps | 98.6% |
| Alliant Reloder-26 | <<locked>> | 94% | 43,671 psi | 85% | 2684 fps | 99.4% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,282 psi | 90% | 2661 fps | 96.4% |
| Bofors RP5 | <<locked>> | 96% | 44,193 psi | 86% | 2625 fps | 96% |
| Bofors RP7 | <<locked>> | 84% | 45,020 psi | 87% | 2513 fps | 97% |
| Hodgdon H414 | <<locked>> | 86% | 45,469 psi | 88% | 2598 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 84% | 46,035 psi | 89% | 2566 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 44,788 psi | 87% | 2552 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 44,817 psi | 87% | 2618 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,230 psi | 70% | 1647 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 45,600 psi | 89% | 2546 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 82% | 43,729 psi | 85% | 2490 fps | 97.2% |
| IMR 4831 | <<locked>> | 88% | 44,411 psi | 86% | 2559 fps | 99.5% |
| Lovex S065 | <<locked>> | 86% | 46,514 psi | 90% | 2543 fps | 98.9% |
| Lovex S070 | <<locked>> | 86% | 44,411 psi | 86% | 2523 fps | 97.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,366 psi | 82% | 2523 fps | 97.9% |
| Norma 204 | <<locked>> | 88% | 45,440 psi | 88% | 2579 fps | 95.9% |
| Norma MRP | <<locked>> | 96% | 46,572 psi | 90% | 2700 fps | 98% |
| Norma URP | <<locked>> | 88% | 45,919 psi | 89% | 2598 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 88% | 44,570 psi | 87% | 2592 fps | 98.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,092 psi | 86% | 2605 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,840 psi | 72% | 1686 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 44,599 psi | 87% | 2628 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 46,064 psi | 89% | 2625 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 45,078 psi | 88% | 2644 fps | 99.3% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,625 psi | 79% | 2615 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 82% | 45,237 psi | 88% | 2533 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 45,992 psi | 89% | 2612 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 84% | 45,020 psi | 87% | 2513 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 86% | 46,514 psi | 90% | 2543 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 86% | 44,411 psi | 86% | 2523 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 46,398 psi | 90% | 2585 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 45,948 psi | 89% | 2493 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,556 psi | 88% | 2608 fps | 96.4% |
| Somchem S355 | <<locked>> | 82% | 45,382 psi | 88% | 2530 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 44,715 psi | 87% | 2608 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 43,888 psi | 85% | 2546 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 84% | 46,325 psi | 90% | 2510 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 44,730 psi | 87% | 2543 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 98% | 46,050 psi | 89% | 2575 fps | 96.9% |
| Vihtavuori N550 | <<locked>> | 86% | 44,063 psi | 86% | 2549 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 94% | 43,947 psi | 85% | 2602 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 43,947 psi | 85% | 2516 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 45,759 psi | 89% | 2602 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,004 psi | 84% | 2730 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,557 psi | 90% | 2589 fps | 96.3% |
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% | 33,779 psi | 66% | 2346 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 35,273 psi | 69% | 2392 fps | 97.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 42,061 psi | 82% | 2533 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,693 psi | 67% | 2398 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,175 psi | 76% | 2523 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 41,568 psi | 81% | 2526 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 94% | 41,568 psi | 81% | 2572 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,411 psi | 49% | 2172 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,518 psi | 63% | 2385 fps | 95.1% |
| Alliant Reloder-26 | 42.9 gr | 84% | 30,734 psi | 60% | 2382 fps | 95.3% |
| Bofors RP15 | <<locked>> | 98% | 43,569 psi | 85% | 2612 fps | 95.6% |
| Bofors RP5 | <<locked>> | 94% | 41,568 psi | 81% | 2572 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 39,653 psi | 77% | 2408 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 37,304 psi | 72% | 2434 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 82% | 43,076 psi | 84% | 2510 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,285 psi | 63% | 2306 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 82% | 38,885 psi | 76% | 2500 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,064 psi | 53% | 1470 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 37,855 psi | 74% | 2392 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,191 psi | 80% | 2441 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 34,142 psi | 66% | 2352 fps | 97.4% |
| Lovex S065 | <<locked>> | 80% | 38,682 psi | 75% | 2395 fps | 97.3% |
| Lovex S070 | <<locked>> | 80% | 36,840 psi | 72% | 2372 fps | 95.5% |
| Lovex S071 | <<locked>> | 92% | 32,822 psi | 64% | 2326 fps | 95% |
| Norma 204 | <<locked>> | 86% | 42,424 psi | 82% | 2523 fps | 95% |
| Norma MRP | 44.6 gr | 90% | 37,971 psi | 74% | 2526 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 35,273 psi | 69% | 2388 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 80% | 34,287 psi | 67% | 2375 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 98% | 41,075 psi | 80% | 2546 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,673 psi | 54% | 1509 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,626 psi | 81% | 2575 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,867 psi | 68% | 2405 fps | 97.2% |
| ReloadSwiss RS 70 | 40.5 gr | 80% | 34,243 psi | 67% | 2411 fps | 96.4% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 37,739 psi | 73% | 2546 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 42,235 psi | 82% | 2480 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 92% | 43,178 psi | 84% | 2562 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 39,653 psi | 77% | 2408 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,682 psi | 75% | 2395 fps | 97.3% |
| Shooters World SW4350 | <<locked>> | 80% | 36,840 psi | 72% | 2372 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,381 psi | 84% | 2533 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,782 psi | 73% | 2339 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,772 psi | 83% | 2556 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 42,670 psi | 83% | 2480 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 31,734 psi | 62% | 2346 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 38,551 psi | 75% | 2444 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 40,683 psi | 79% | 2418 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,622 psi | 71% | 2388 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 94% | 40,408 psi | 78% | 2470 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 36,274 psi | 70% | 2392 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 27,688 psi | 54% | 2244 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,868 psi | 70% | 2362 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 37,565 psi | 73% | 2441 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,396 psi | 49% | 2244 fps | 95.7% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,424 psi | 84% | 2530 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 54 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 140gr | Nosler Partition. Winchester StaBALL HD delivers the highest muzzle velocity at 2,730 fps; across all powders the maximum-charge window runs from 1,647 fps to 2,730 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 54 of the 54 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 140.0 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, Norma MRP, ReloadSwiss RS 70 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 140gr | Nosler Partition 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.