Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 126gr | Lehigh Defense Controlled Chaos bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Somchem S365 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 3100ᴾ | <<locked>> | 100% | 44,933 psi | 87% | 2690 fps | 97.3% |
| Accurate 4064 | <<locked>> | 82% | 45,063 psi | 88% | 2631 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 44,222 psi | 86% | 2697 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 84% | 45,992 psi | 89% | 2651 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 45,977 psi | 89% | 2674 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 82% | 46,253 psi | 90% | 2687 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 92% | 45,847 psi | 89% | 2759 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 88% | 46,267 psi | 90% | 2785 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,279 psi | 82% | 2710 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 44,570 psi | 87% | 2822 fps | 98.6% |
| Bofors RP3 | <<locked>> | 84% | 46,195 psi | 90% | 2687 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 82% | 44,034 psi | 86% | 2641 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 88% | 43,685 psi | 85% | 2687 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 45,397 psi | 88% | 2690 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,853 psi | 70% | 1726 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 45,513 psi | 88% | 2635 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 45,266 psi | 88% | 2635 fps | 96.2% |
| IMR 4831 | <<locked>> | 92% | 44,962 psi | 87% | 2694 fps | 98.8% |
| Lovex S062 | <<locked>> | 82% | 45,585 psi | 89% | 2638 fps | 99.9% |
| Lovex S065 | <<locked>> | 88% | 44,904 psi | 87% | 2631 fps | 97.6% |
| Lovex S070 | <<locked>> | 90% | 45,643 psi | 89% | 2667 fps | 96.7% |
| Norma 203B | <<locked>> | 82% | 45,571 psi | 89% | 2677 fps | 99.5% |
| Norma URP | <<locked>> | 90% | 43,801 psi | 85% | 2687 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 82% | 45,513 psi | 88% | 2694 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 92% | 45,542 psi | 88% | 2733 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,390 psi | 71% | 1765 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 44,251 psi | 86% | 2621 fps | 96.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 45,934 psi | 89% | 2785 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 43,888 psi | 85% | 2713 fps | 98.4% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 46,253 psi | 90% | 2785 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 86% | 46,412 psi | 90% | 2684 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 44,904 psi | 87% | 2631 fps | 97.6% |
| Shooters World Precision | <<locked>> | 82% | 45,585 psi | 89% | 2638 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 90% | 45,643 psi | 89% | 2667 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 44,715 psi | 87% | 2687 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 45,426 psi | 88% | 2552 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 44,498 psi | 86% | 2582 fps | 96.2% |
| Somchem S355 | <<locked>> | 84% | 43,932 psi | 85% | 2631 fps | 99.6% |
| Somchem S365 | <<locked>> | 94% | 44,947 psi | 87% | 2746 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 44,918 psi | 87% | 2615 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 45,832 psi | 89% | 2687 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 82% | 46,166 psi | 90% | 2628 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 45,049 psi | 87% | 2690 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 98% | 43,976 psi | 85% | 2733 fps | 99.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 45,527 psi | 88% | 2664 fps | 99.9% |
| Winchester 760 | <<locked>> | 88% | 43,990 psi | 85% | 2694 fps | 96.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,072 psi | 74% | 2733 fps | 99.7% |
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>> | 96% | 39,073 psi | 76% | 2575 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 42,337 psi | 82% | 2585 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 33,475 psi | 65% | 2467 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 40,712 psi | 79% | 2549 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,654 psi | 79% | 2575 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,526 psi | 85% | 2638 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 82% | 33,475 psi | 65% | 2480 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,070 psi | 68% | 2549 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,153 psi | 57% | 2388 fps | 95.5% |
| Alliant Reloder-26 | 46.3 gr | 92% | 35,868 psi | 70% | 2625 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 40,422 psi | 79% | 2579 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 80% | 41,104 psi | 80% | 2582 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 86% | 41,031 psi | 80% | 2631 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,051 psi | 56% | 2329 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,614 psi | 52% | 1539 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,743 psi | 83% | 2582 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,670 psi | 83% | 2585 fps | 95.5% |
| IMR 4831 | <<locked>> | 82% | 32,532 psi | 63% | 2428 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 42,844 psi | 83% | 2585 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 37,449 psi | 73% | 2480 fps | 95.5% |
| Lovex S070 | <<locked>> | 86% | 40,437 psi | 79% | 2562 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 42,873 psi | 83% | 2625 fps | 99.2% |
| Norma URP | <<locked>> | 82% | 33,721 psi | 65% | 2467 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 42,511 psi | 83% | 2638 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 88% | 40,030 psi | 78% | 2621 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,180 psi | 53% | 1578 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,394 psi | 80% | 2566 fps | 95.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,333 psi | 73% | 2612 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 33,272 psi | 65% | 2484 fps | 95.2% |
| ReloadSwiss RS 70 | 41.9 gr | 84% | 35,302 psi | 69% | 2543 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 38,101 psi | 74% | 2526 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,449 psi | 73% | 2480 fps | 95.5% |
| Shooters World Precision | <<locked>> | 80% | 42,844 psi | 83% | 2585 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 40,437 psi | 79% | 2562 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,943 psi | 76% | 2572 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,292 psi | 78% | 2464 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,872 psi | 81% | 2533 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 38,812 psi | 75% | 2530 fps | 98.8% |
| Somchem S365 | 37.3 gr | 80% | 28,369 psi | 55% | 2369 fps | 97.1% |
| Vihtavuori N150 | <<locked>> | 80% | 36,927 psi | 72% | 2464 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 32,924 psi | 64% | 2418 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 43,163 psi | 84% | 2579 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 34,737 psi | 67% | 2474 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 88% | 31,575 psi | 61% | 2464 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,489 psi | 63% | 2392 fps | 97.4% |
| Winchester 760 | <<locked>> | 86% | 41,031 psi | 80% | 2631 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 92% | 29,298 psi | 57% | 2470 fps | 96.3% |
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 47 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 126gr | Lehigh Defense Controlled Chaos. Alliant Reloder-26 delivers the highest muzzle velocity at 2,822 fps; across all powders the maximum-charge window runs from 1,726 fps to 2,822 fps. Accurate 3100 gives the best case fill at 100 %, and 47 of the 47 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 126.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, 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, Somchem S365, ReloadSwiss RS 70 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 126gr | Lehigh Defense Controlled Chaos 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.