Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 140gr | Nosler Custom Competition 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% | 44,309 psi | 86% | 2556 fps | 98.3% |
| Accurate 4350 | <<locked>> | 88% | 46,485 psi | 90% | 2608 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,773 psi | 87% | 2585 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 44,730 psi | 87% | 2612 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 84% | 44,715 psi | 87% | 2628 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,295 psi | 86% | 2628 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 98% | 44,585 psi | 87% | 2628 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,553 psi | 81% | 2598 fps | 98.5% |
| Alliant Reloder-26 | <<locked>> | 94% | 43,787 psi | 85% | 2687 fps | 99.4% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,398 psi | 90% | 2664 fps | 96.4% |
| Bofors RP5 | <<locked>> | 96% | 44,295 psi | 86% | 2628 fps | 96% |
| Bofors RP7 | <<locked>> | 84% | 44,802 psi | 87% | 2510 fps | 97% |
| Hodgdon H414 | <<locked>> | 86% | 45,556 psi | 88% | 2598 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 84% | 45,832 psi | 89% | 2562 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 44,570 psi | 87% | 2546 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 44,918 psi | 87% | 2621 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,274 psi | 70% | 1647 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 45,687 psi | 89% | 2546 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 46,456 psi | 90% | 2539 fps | 97.8% |
| IMR 4831 | <<locked>> | 88% | 44,193 psi | 86% | 2552 fps | 99.5% |
| Lovex S065 | <<locked>> | 86% | 46,311 psi | 90% | 2539 fps | 98.9% |
| Lovex S070 | <<locked>> | 86% | 44,512 psi | 86% | 2526 fps | 97.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,148 psi | 82% | 2520 fps | 97.9% |
| Norma 204 | <<locked>> | 88% | 45,223 psi | 88% | 2575 fps | 95.8% |
| Norma MRP | <<locked>> | 94% | 43,598 psi | 85% | 2644 fps | 97.3% |
| Norma URP | <<locked>> | 88% | 45,701 psi | 89% | 2592 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 88% | 44,382 psi | 86% | 2589 fps | 98.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 43,918 psi | 85% | 2602 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,898 psi | 72% | 1686 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 44,382 psi | 86% | 2621 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 46,166 psi | 90% | 2628 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 44,889 psi | 87% | 2641 fps | 99.3% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,480 psi | 79% | 2612 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 82% | 45,020 psi | 87% | 2530 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 46,093 psi | 90% | 2615 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 84% | 44,802 psi | 87% | 2510 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 86% | 46,311 psi | 90% | 2539 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 86% | 44,512 psi | 86% | 2526 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 46,180 psi | 90% | 2582 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 46,543 psi | 90% | 2441 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 45,774 psi | 89% | 2490 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,672 psi | 89% | 2612 fps | 96.4% |
| Somchem S355 | <<locked>> | 82% | 45,469 psi | 88% | 2530 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 44,498 psi | 86% | 2602 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 43,990 psi | 85% | 2549 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 84% | 46,108 psi | 90% | 2510 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 44,527 psi | 86% | 2539 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 98% | 45,861 psi | 89% | 2572 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 86% | 43,874 psi | 85% | 2543 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 94% | 44,019 psi | 85% | 2605 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 43,772 psi | 85% | 2513 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 45,556 psi | 88% | 2598 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,801 psi | 83% | 2726 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,369 psi | 90% | 2585 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% | 33,823 psi | 66% | 2346 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 35,331 psi | 69% | 2392 fps | 97.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 41,843 psi | 81% | 2530 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,751 psi | 67% | 2402 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,986 psi | 76% | 2516 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 94% | 41,394 psi | 80% | 2569 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,469 psi | 49% | 2172 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,372 psi | 63% | 2382 fps | 95.1% |
| Alliant Reloder-26 | 42.9 gr | 84% | 30,792 psi | 60% | 2382 fps | 95.4% |
| Bofors RP15 | <<locked>> | 98% | 43,395 psi | 84% | 2605 fps | 95.6% |
| Bofors RP5 | <<locked>> | 94% | 41,394 psi | 80% | 2569 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 39,740 psi | 77% | 2408 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 37,376 psi | 73% | 2438 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 80% | 40,364 psi | 78% | 2457 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,140 psi | 62% | 2300 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 82% | 38,972 psi | 76% | 2500 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 53% | 1470 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 40,263 psi | 78% | 2444 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,002 psi | 80% | 2438 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 33,968 psi | 66% | 2346 fps | 97.3% |
| Lovex S065 | <<locked>> | 80% | 38,754 psi | 75% | 2395 fps | 97.3% |
| Lovex S070 | <<locked>> | 80% | 36,912 psi | 72% | 2375 fps | 95.6% |
| Lovex S071 | <<locked>> | 94% | 34,780 psi | 68% | 2369 fps | 95.7% |
| Norma 204 | <<locked>> | 86% | 42,511 psi | 83% | 2526 fps | 95% |
| Norma MRP | 44.6 gr | 90% | 38,072 psi | 74% | 2530 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 35,346 psi | 69% | 2392 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 80% | 34,113 psi | 66% | 2372 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 98% | 40,843 psi | 79% | 2539 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,441 psi | 53% | 1506 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,423 psi | 80% | 2569 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,940 psi | 68% | 2408 fps | 97.2% |
| ReloadSwiss RS 70 | 40.5 gr | 80% | 34,316 psi | 67% | 2411 fps | 96.5% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 37,797 psi | 73% | 2546 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 42,279 psi | 82% | 2484 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 92% | 42,975 psi | 83% | 2559 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 39,740 psi | 77% | 2408 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,754 psi | 75% | 2395 fps | 97.3% |
| Shooters World SW4350 | <<locked>> | 80% | 36,912 psi | 72% | 2375 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,178 psi | 84% | 2530 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,758 psi | 85% | 2398 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,884 psi | 74% | 2343 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,569 psi | 83% | 2552 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 42,757 psi | 83% | 2484 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 31,792 psi | 62% | 2349 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 38,421 psi | 75% | 2441 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 40,756 psi | 79% | 2418 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,695 psi | 71% | 2388 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 94% | 40,234 psi | 78% | 2467 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 36,100 psi | 70% | 2388 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 80% | 27,528 psi | 53% | 2241 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,940 psi | 70% | 2365 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 37,376 psi | 73% | 2438 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,425 psi | 49% | 2247 fps | 95.7% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,178 psi | 84% | 2526 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 Custom Competition. Winchester StaBALL HD delivers the highest muzzle velocity at 2,726 fps; across all powders the maximum-charge window runs from 1,647 fps to 2,726 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 Custom Competition 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.