Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 120gr | Hornady GMX bullet and 56 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, 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 2495 | <<locked>> | 84% | 46,456 psi | 90% | 2687 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 43,816 psi | 85% | 2684 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 46,253 psi | 90% | 2799 fps | 98.6% |
| ADI AR 2208 | <<locked>> | 86% | 45,803 psi | 89% | 2713 fps | 98.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 43,569 psi | 85% | 2795 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 45,759 psi | 89% | 2736 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 84% | 46,064 psi | 89% | 2749 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 94% | 45,411 psi | 88% | 2812 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 90% | 45,643 psi | 89% | 2841 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,986 psi | 76% | 2700 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,671 psi | 85% | 2864 fps | 97.9% |
| Bofors RP3 | <<locked>> | 86% | 45,730 psi | 89% | 2746 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 84% | 43,424 psi | 84% | 2694 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 92% | 46,195 psi | 90% | 2795 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 44,759 psi | 87% | 2746 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 44,338 psi | 86% | 2746 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,418 psi | 69% | 1759 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 46,195 psi | 90% | 2723 fps | 99.5% |
| IMR 4064 | <<locked>> | 84% | 45,208 psi | 88% | 2694 fps | 98.9% |
| IMR 4831 | <<locked>> | 94% | 44,469 psi | 86% | 2749 fps | 98.3% |
| IMR 4895 | <<locked>> | 82% | 44,353 psi | 86% | 2730 fps | 99.1% |
| Lovex S062 | <<locked>> | 84% | 45,034 psi | 87% | 2694 fps | 99.8% |
| Lovex S065 | <<locked>> | 90% | 44,672 psi | 87% | 2690 fps | 97% |
| Lovex S070 | <<locked>> | 92% | 45,020 psi | 87% | 2717 fps | 95.9% |
| Norma 201 | <<locked>> | 82% | 46,427 psi | 90% | 2707 fps | 99.9% |
| Norma 203B | <<locked>> | 84% | 45,382 psi | 88% | 2736 fps | 99.2% |
| Norma URP | <<locked>> | 94% | 46,282 psi | 90% | 2799 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 84% | 45,237 psi | 88% | 2753 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 94% | 45,194 psi | 88% | 2785 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,853 psi | 70% | 1801 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 44,135 psi | 86% | 2680 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 45,847 psi | 89% | 2805 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 45,701 psi | 89% | 2848 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 46,093 psi | 90% | 2822 fps | 98.3% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 46,151 psi | 90% | 2844 fps | 97.9% |
| Rottweil R 902 | <<locked>> | 82% | 44,237 psi | 86% | 2661 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 88% | 45,585 psi | 89% | 2736 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 44,672 psi | 87% | 2690 fps | 97% |
| Shooters World Precision | <<locked>> | 84% | 45,034 psi | 87% | 2694 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 92% | 45,020 psi | 87% | 2717 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 44,092 psi | 86% | 2740 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 46,209 psi | 90% | 2730 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 45,252 psi | 88% | 2615 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 46,412 psi | 90% | 2743 fps | 99.6% |
| Somchem S365 | <<locked>> | 96% | 44,034 psi | 86% | 2799 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 43,903 psi | 85% | 2641 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 44,440 psi | 86% | 2648 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 44,353 psi | 86% | 2674 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 92% | 45,237 psi | 88% | 2740 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 84% | 45,730 psi | 89% | 2690 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 44,338 psi | 86% | 2740 fps | 97.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,728 psi | 83% | 2776 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 45,411 psi | 88% | 2723 fps | 99.7% |
| Winchester 760 | <<locked>> | 92% | 46,485 psi | 90% | 2802 fps | 96.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,940 psi | 68% | 2697 fps | 98.3% |
| Winchester StaBALL Match | <<locked>> | 82% | 45,701 psi | 89% | 2733 fps | 99.6% |
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 2495 | <<locked>> | 80% | 40,654 psi | 79% | 2589 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 38,493 psi | 75% | 2582 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 34,838 psi | 68% | 2562 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 37,898 psi | 74% | 2549 fps | 97.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,886 psi | 79% | 2740 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,507 psi | 73% | 2572 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,306 psi | 78% | 2638 fps | 97.9% |
| Alliant Reloder-16 | 39 gr | 86% | 35,317 psi | 69% | 2582 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,285 psi | 63% | 2533 fps | 96.4% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,342 psi | 59% | 2477 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 37,753 psi | 73% | 2726 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 36,970 psi | 72% | 2572 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 80% | 37,898 psi | 74% | 2575 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 90% | 43,308 psi | 84% | 2740 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,197 psi | 59% | 2421 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,263 psi | 80% | 2687 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,150 psi | 51% | 1568 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,337 psi | 84% | 2667 fps | 99.2% |
| IMR 4064 | <<locked>> | 80% | 39,798 psi | 77% | 2585 fps | 97.8% |
| IMR 4831 | <<locked>> | 86% | 33,968 psi | 66% | 2526 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 41,321 psi | 80% | 2667 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 39,668 psi | 77% | 2592 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 39,450 psi | 77% | 2585 fps | 95.5% |
| Lovex S070 | <<locked>> | 90% | 42,279 psi | 82% | 2664 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 43,598 psi | 85% | 2654 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 39,653 psi | 77% | 2625 fps | 98.2% |
| Norma URP | <<locked>> | 86% | 35,375 psi | 69% | 2569 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 39,537 psi | 77% | 2641 fps | 98% |
| Ramshot Hunter | <<locked>> | 92% | 42,177 psi | 82% | 2723 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,614 psi | 52% | 1608 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,191 psi | 80% | 2621 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,540 psi | 83% | 2740 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,418 psi | 67% | 2602 fps | 99.3% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 34,693 psi | 67% | 2582 fps | 95% |
| ReloadSwiss RS 70 | 43.6 gr | 88% | 37,420 psi | 73% | 2651 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 41,510 psi | 81% | 2608 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 34,751 psi | 67% | 2516 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,450 psi | 77% | 2585 fps | 95.5% |
| Shooters World Precision | <<locked>> | 80% | 39,668 psi | 77% | 2592 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 90% | 42,279 psi | 82% | 2664 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,911 psi | 70% | 2566 fps | 97.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,163 psi | 84% | 2671 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,492 psi | 73% | 2477 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 35,679 psi | 69% | 2523 fps | 97.7% |
| Somchem S365 | 38 gr | 82% | 27,644 psi | 54% | 2405 fps | 95.9% |
| Vihtavuori N135 | <<locked>> | 80% | 41,075 psi | 80% | 2592 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,698 psi | 81% | 2598 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,939 psi | 66% | 2461 fps | 98.4% |
| Vihtavuori N160 | <<locked>> | 84% | 34,635 psi | 67% | 2520 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 40,074 psi | 78% | 2585 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 36,390 psi | 71% | 2575 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 92% | 32,677 psi | 63% | 2556 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,226 psi | 59% | 2385 fps | 95.7% |
| Winchester 760 | <<locked>> | 90% | 43,308 psi | 84% | 2740 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,400 psi | 59% | 2556 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,931 psi | 83% | 2680 fps | 99.2% |
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 56 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 120gr | Hornady GMX. Alliant Reloder-26 delivers the highest muzzle velocity at 2,864 fps; across all powders the maximum-charge window runs from 1,759 fps to 2,864 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 56 of the 56 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (355 MPa), the top charges use 68–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.264" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, 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-16, Somchem S365, ReloadSwiss RS 70 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 120gr | Hornady GMX 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.