Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 122gr | THAC EDH bullet and 42 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Alliant Reloder-16 and Somchem S365.
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% | 45,223 psi | 88% | 2713 fps | 96.9% |
| Accurate 4064 | <<locked>> | 82% | 46,166 psi | 90% | 2671 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 44,628 psi | 87% | 2723 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 84% | 46,180 psi | 90% | 2674 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 46,354 psi | 90% | 2703 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 92% | 45,818 psi | 89% | 2776 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 88% | 45,948 psi | 89% | 2802 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,598 psi | 83% | 2736 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 44,396 psi | 86% | 2838 fps | 98.1% |
| Bofors RP3 | <<locked>> | 84% | 46,572 psi | 90% | 2713 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 82% | 44,266 psi | 86% | 2664 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 45,440 psi | 88% | 2713 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,042 psi | 70% | 1742 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 45,687 psi | 89% | 2657 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 45,252 psi | 88% | 2720 fps | 98.5% |
| Lovex S062 | <<locked>> | 82% | 46,093 psi | 90% | 2667 fps | 99.9% |
| Lovex S065 | <<locked>> | 88% | 45,484 psi | 88% | 2664 fps | 97.2% |
| Lovex S070 | <<locked>> | 90% | 46,006 psi | 89% | 2690 fps | 96.2% |
| Norma 203B | <<locked>> | 82% | 46,021 psi | 89% | 2707 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 43,888 psi | 85% | 2710 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 82% | 45,759 psi | 89% | 2720 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 92% | 45,658 psi | 89% | 2753 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,637 psi | 71% | 1785 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 44,396 psi | 86% | 2644 fps | 96.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 45,963 psi | 89% | 2812 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 44,077 psi | 86% | 2740 fps | 98% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 46,441 psi | 90% | 2808 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 84% | 43,947 psi | 85% | 2661 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 45,484 psi | 88% | 2664 fps | 97.2% |
| Shooters World Precision | <<locked>> | 82% | 46,093 psi | 90% | 2667 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 90% | 46,006 psi | 89% | 2690 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 44,715 psi | 87% | 2707 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 45,614 psi | 89% | 2579 fps | 100% |
| Somchem S355 | <<locked>> | 84% | 44,483 psi | 86% | 2661 fps | 99.4% |
| Somchem S365 | <<locked>> | 94% | 45,049 psi | 87% | 2772 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 45,063 psi | 88% | 2641 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 90% | 45,905 psi | 89% | 2710 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 82% | 46,267 psi | 90% | 2654 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 45,237 psi | 88% | 2713 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 98% | 44,266 psi | 86% | 2762 fps | 98.8% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 45,368 psi | 88% | 2684 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,479 psi | 75% | 2756 fps | 99.5% |
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% | 39,537 psi | 77% | 2605 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 43,453 psi | 84% | 2625 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,345 psi | 67% | 2503 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 40,959 psi | 80% | 2572 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,104 psi | 80% | 2602 fps | 99.2% |
| Alliant Reloder-16 | 36.7 gr | 82% | 34,011 psi | 66% | 2507 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,621 psi | 69% | 2579 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,008 psi | 58% | 2425 fps | 95.2% |
| Alliant Reloder-26 | 45.5 gr | 92% | 36,564 psi | 71% | 2654 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 41,220 psi | 80% | 2615 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 80% | 41,713 psi | 81% | 2612 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,704 psi | 58% | 2362 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,977 psi | 52% | 1558 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,033 psi | 84% | 2608 fps | 98.6% |
| IMR 4831 | <<locked>> | 82% | 33,243 psi | 65% | 2464 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 43,366 psi | 84% | 2615 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 38,159 psi | 74% | 2513 fps | 95.1% |
| Lovex S070 | <<locked>> | 88% | 43,366 psi | 84% | 2638 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 43,323 psi | 84% | 2654 fps | 99% |
| Norma URP | <<locked>> | 82% | 34,316 psi | 67% | 2500 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 42,830 psi | 83% | 2667 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 40,277 psi | 78% | 2641 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,311 psi | 53% | 1591 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,887 psi | 81% | 2592 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,753 psi | 73% | 2641 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 36,114 psi | 70% | 2572 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 38,101 psi | 74% | 2625 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 38,856 psi | 75% | 2559 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,159 psi | 74% | 2513 fps | 95.1% |
| Shooters World Precision | <<locked>> | 80% | 43,366 psi | 84% | 2615 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 43,366 psi | 84% | 2638 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,320 psi | 76% | 2602 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,611 psi | 79% | 2493 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 39,421 psi | 77% | 2559 fps | 98.6% |
| Somchem S365 | 36.6 gr | 80% | 29,153 psi | 57% | 2405 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 80% | 37,507 psi | 73% | 2497 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 82% | 35,607 psi | 69% | 2500 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 43,584 psi | 85% | 2608 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,186 psi | 68% | 2500 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 88% | 32,460 psi | 63% | 2503 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,112 psi | 64% | 2421 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 92% | 30,124 psi | 59% | 2503 fps | 95.8% |
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 42 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 122gr | THAC EDH. Alliant Reloder-26 delivers the highest muzzle velocity at 2,838 fps; across all powders the maximum-charge window runs from 1,742 fps to 2,838 fps. Accurate 3100 gives the best case fill at 100 %, and 42 of the 42 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 122.0 gr projectile in 0.264" calls for a 1:7.5 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, Alliant Reloder-16, Somchem S365 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 122gr | THAC EDH 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.