Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 125gr | Hammer HHT bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, Alliant Reloder-26 and Alliant Reloder-16.
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% | 43,918 psi | 85% | 2677 fps | 96.9% |
| Accurate 4064 | <<locked>> | 82% | 44,251 psi | 86% | 2628 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 46,499 psi | 90% | 2743 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 84% | 45,324 psi | 88% | 2648 fps | 99% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 46,151 psi | 90% | 2789 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 45,266 psi | 88% | 2671 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 82% | 45,542 psi | 88% | 2680 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 92% | 44,889 psi | 87% | 2746 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 88% | 45,223 psi | 88% | 2772 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,669 psi | 81% | 2707 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 46,586 psi | 90% | 2867 fps | 98.9% |
| Bofors RP3 | <<locked>> | 84% | 45,440 psi | 88% | 2680 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 84% | 46,122 psi | 90% | 2687 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 90% | 45,803 psi | 89% | 2733 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 44,672 psi | 87% | 2687 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,665 psi | 69% | 1726 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 44,802 psi | 87% | 2628 fps | 99.1% |
| IMR 4350 | <<locked>> | 92% | 45,992 psi | 89% | 2674 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 44,686 psi | 87% | 2628 fps | 95.9% |
| IMR 4831 | <<locked>> | 92% | 44,251 psi | 86% | 2687 fps | 98.6% |
| Lovex S062 | <<locked>> | 82% | 44,846 psi | 87% | 2631 fps | 99.9% |
| Lovex S065 | <<locked>> | 88% | 44,251 psi | 86% | 2628 fps | 97.3% |
| Lovex S070 | <<locked>> | 90% | 45,005 psi | 87% | 2661 fps | 96.4% |
| Norma 203B | <<locked>> | 82% | 44,860 psi | 87% | 2671 fps | 99.4% |
| Norma MRPᴾ | <<locked>> | 100% | 46,586 psi | 90% | 2828 fps | 96.4% |
| Norma URP | <<locked>> | 92% | 45,934 psi | 89% | 2733 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 82% | 44,802 psi | 87% | 2687 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 92% | 44,585 psi | 87% | 2720 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,187 psi | 70% | 1765 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 46,325 psi | 90% | 2667 fps | 97.1% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 44,933 psi | 87% | 2776 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 45,992 psi | 89% | 2759 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 45,382 psi | 88% | 2776 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 86% | 45,310 psi | 88% | 2674 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 44,251 psi | 86% | 2628 fps | 97.3% |
| Shooters World Precision | <<locked>> | 82% | 44,846 psi | 87% | 2631 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 90% | 45,005 psi | 87% | 2661 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 43,685 psi | 85% | 2674 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 44,715 psi | 87% | 2549 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,932 psi | 85% | 2575 fps | 95.8% |
| Somchem S355 | <<locked>> | 86% | 45,977 psi | 89% | 2674 fps | 99.7% |
| Somchem S365 | <<locked>> | 94% | 43,888 psi | 85% | 2736 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 43,903 psi | 85% | 2605 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 90% | 44,817 psi | 87% | 2677 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 82% | 45,150 psi | 88% | 2621 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 44,092 psi | 86% | 2680 fps | 98.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,093 psi | 90% | 2782 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 44,657 psi | 87% | 2657 fps | 99.8% |
| Winchester 760 | <<locked>> | 90% | 46,093 psi | 90% | 2736 fps | 96.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,318 psi | 72% | 2717 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% | 38,145 psi | 74% | 2562 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 41,510 psi | 81% | 2579 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 32,750 psi | 64% | 2457 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 40,045 psi | 78% | 2543 fps | 98.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,004 psi | 84% | 2730 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,929 psi | 78% | 2569 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,801 psi | 83% | 2631 fps | 98.8% |
| Alliant Reloder-16 | 37 gr | 82% | 32,909 psi | 64% | 2467 fps | 95.3% |
| Alliant Reloder-17 | 38.9 gr | 80% | 34,490 psi | 67% | 2539 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 28,645 psi | 56% | 2379 fps | 95% |
| Alliant Reloder-26 | 45.9 gr | 92% | 35,331 psi | 69% | 2615 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 39,697 psi | 77% | 2572 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 80% | 40,437 psi | 79% | 2575 fps | 97.2% |
| Hodgdon H414 | <<locked>> | 88% | 42,989 psi | 83% | 2680 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,485 psi | 55% | 2320 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,658 psi | 52% | 1542 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,076 psi | 82% | 2575 fps | 98.7% |
| IMR 4350 | <<locked>> | 90% | 43,265 psi | 84% | 2625 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,061 psi | 82% | 2579 fps | 95.1% |
| IMR 4831 | <<locked>> | 84% | 34,011 psi | 66% | 2474 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 42,119 psi | 82% | 2582 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 36,840 psi | 72% | 2474 fps | 95.1% |
| Lovex S070 | <<locked>> | 88% | 42,322 psi | 82% | 2608 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 42,148 psi | 82% | 2618 fps | 99% |
| Norma MRP | <<locked>> | 98% | 43,453 psi | 84% | 2762 fps | 95.5% |
| Norma URP | <<locked>> | 82% | 33,098 psi | 64% | 2461 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 41,785 psi | 81% | 2631 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 39,175 psi | 76% | 2608 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,919 psi | 52% | 1575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,770 psi | 79% | 2559 fps | 95.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,680 psi | 71% | 2605 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 34,838 psi | 68% | 2530 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 37,217 psi | 72% | 2595 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 37,376 psi | 73% | 2516 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 36,840 psi | 72% | 2474 fps | 95.1% |
| Shooters World Precision | <<locked>> | 80% | 42,119 psi | 82% | 2582 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 42,322 psi | 82% | 2608 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,276 psi | 74% | 2566 fps | 98.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,624 psi | 77% | 2461 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,205 psi | 80% | 2526 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 38,101 psi | 74% | 2523 fps | 98.6% |
| Somchem S365 | <<locked>> | 80% | 27,818 psi | 54% | 2359 fps | 96.6% |
| Vihtavuori N150 | <<locked>> | 80% | 36,260 psi | 70% | 2457 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 82% | 34,461 psi | 67% | 2464 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 42,496 psi | 83% | 2575 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 33,895 psi | 66% | 2461 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 88% | 30,922 psi | 60% | 2454 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,981 psi | 62% | 2385 fps | 97.1% |
| Winchester 760 | <<locked>> | 88% | 42,989 psi | 83% | 2680 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 92% | 28,689 psi | 56% | 2454 fps | 95.5% |
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 75 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 125gr | Hammer HHT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,867 fps; across all powders the maximum-charge window runs from 1,726 fps to 2,867 fps. Accurate 3100 gives the best case fill at 100 %, and 75 of the 75 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (355 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. The 125.0 gr projectile in 0.264" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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-17, Alliant Reloder-26, Alliant Reloder-16 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 125gr | Hammer HHT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, ADI AR 2213, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.