Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 125gr | SUS-TAC HPT 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-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 2495 | <<locked>> | 82% | 46,572 psi | 90% | 2621 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 43,395 psi | 84% | 2664 fps | 96.7% |
| Accurate 4064 | <<locked>> | 82% | 43,976 psi | 85% | 2621 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 45,890 psi | 89% | 2730 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 84% | 45,107 psi | 88% | 2641 fps | 99% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 45,919 psi | 89% | 2785 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 45,005 psi | 87% | 2664 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 82% | 45,295 psi | 88% | 2674 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 92% | 44,701 psi | 87% | 2740 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 88% | 45,049 psi | 87% | 2769 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,220 psi | 80% | 2694 fps | 99.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 46,485 psi | 90% | 2864 fps | 98.8% |
| Bofors RP3 | <<locked>> | 84% | 45,223 psi | 88% | 2674 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 84% | 45,919 psi | 89% | 2680 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 90% | 45,614 psi | 89% | 2726 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 44,164 psi | 86% | 2674 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 46,499 psi | 90% | 2723 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,592 psi | 69% | 1719 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 44,556 psi | 87% | 2621 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 44,483 psi | 86% | 2621 fps | 95.8% |
| IMR 4831 | <<locked>> | 92% | 44,063 psi | 86% | 2684 fps | 98.5% |
| IMR 4895 | <<locked>> | 82% | 46,441 psi | 90% | 2707 fps | 99.6% |
| Lovex S062 | <<locked>> | 82% | 44,599 psi | 87% | 2625 fps | 99.9% |
| Lovex S065 | <<locked>> | 88% | 44,063 psi | 86% | 2621 fps | 97.2% |
| Lovex S070 | <<locked>> | 90% | 44,817 psi | 87% | 2654 fps | 96.3% |
| Norma 203B | <<locked>> | 82% | 44,628 psi | 87% | 2664 fps | 99.3% |
| Norma MRPᴾ | <<locked>> | 100% | 46,122 psi | 90% | 2812 fps | 96.2% |
| Norma URP | <<locked>> | 92% | 45,701 psi | 89% | 2726 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 82% | 44,570 psi | 87% | 2684 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 92% | 44,440 psi | 86% | 2713 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,114 psi | 70% | 1762 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 46,166 psi | 90% | 2661 fps | 97% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 44,730 psi | 87% | 2769 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 45,818 psi | 89% | 2756 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 45,266 psi | 88% | 2769 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 86% | 45,078 psi | 88% | 2667 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 44,063 psi | 86% | 2621 fps | 97.2% |
| Shooters World Precision | <<locked>> | 82% | 44,599 psi | 87% | 2625 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 90% | 44,817 psi | 87% | 2654 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 43,497 psi | 84% | 2667 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 44,512 psi | 86% | 2543 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 46,572 psi | 90% | 2621 fps | 96.4% |
| Somchem S355 | <<locked>> | 86% | 45,759 psi | 89% | 2671 fps | 99.7% |
| Somchem S365 | <<locked>> | 94% | 43,671 psi | 85% | 2730 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 46,470 psi | 90% | 2717 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 82% | 46,354 psi | 90% | 2615 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 46,557 psi | 90% | 2651 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 44,614 psi | 87% | 2671 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 82% | 44,947 psi | 87% | 2615 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 43,888 psi | 85% | 2674 fps | 98.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,600 psi | 89% | 2772 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 44,512 psi | 86% | 2651 fps | 99.7% |
| Winchester 760 | <<locked>> | 90% | 45,614 psi | 89% | 2726 fps | 96.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,956 psi | 72% | 2703 fps | 99.4% |
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% | 43,642 psi | 85% | 2575 fps | 100% |
| Accurate 3100 | <<locked>> | 96% | 37,942 psi | 74% | 2559 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 41,292 psi | 80% | 2572 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 32,532 psi | 63% | 2451 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 39,798 psi | 77% | 2536 fps | 98% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,801 psi | 83% | 2720 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,682 psi | 77% | 2559 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,554 psi | 83% | 2621 fps | 98.7% |
| Alliant Reloder-16 | 36.8 gr | 82% | 32,735 psi | 64% | 2464 fps | 95.1% |
| Alliant Reloder-17 | 38.7 gr | 80% | 34,316 psi | 67% | 2533 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 90% | 30,298 psi | 59% | 2428 fps | 95.9% |
| Alliant Reloder-26 | 45.6 gr | 92% | 34,969 psi | 68% | 2605 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 39,465 psi | 77% | 2566 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 80% | 40,219 psi | 78% | 2569 fps | 97.1% |
| Hodgdon H414 | <<locked>> | 88% | 42,482 psi | 83% | 2667 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,297 psi | 55% | 2313 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,337 psi | 84% | 2667 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,527 psi | 52% | 1535 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,814 psi | 81% | 2569 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 41,843 psi | 81% | 2572 fps | 95% |
| IMR 4831 | <<locked>> | 84% | 33,823 psi | 66% | 2467 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 43,598 psi | 85% | 2654 fps | 99.2% |
| Lovex S062 | <<locked>> | 80% | 41,872 psi | 81% | 2572 fps | 99.6% |
| Lovex S065 | <<locked>> | 82% | 36,637 psi | 71% | 2467 fps | 95% |
| Lovex S070 | <<locked>> | 88% | 41,858 psi | 81% | 2598 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 41,916 psi | 81% | 2612 fps | 99% |
| Norma MRP | <<locked>> | 98% | 43,308 psi | 84% | 2756 fps | 95.4% |
| Norma URP | <<locked>> | 82% | 32,895 psi | 64% | 2454 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 41,582 psi | 81% | 2625 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 39,015 psi | 76% | 2602 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,079 psi | 53% | 1578 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,538 psi | 79% | 2552 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,492 psi | 71% | 2598 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 34,621 psi | 67% | 2523 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 37,072 psi | 72% | 2589 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 37,159 psi | 72% | 2510 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 82% | 36,637 psi | 71% | 2467 fps | 95% |
| Shooters World Precision | <<locked>> | 80% | 41,872 psi | 81% | 2572 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 41,858 psi | 81% | 2598 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,058 psi | 74% | 2559 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,407 psi | 77% | 2454 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,714 psi | 85% | 2569 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 37,884 psi | 74% | 2516 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 27,630 psi | 54% | 2352 fps | 96.5% |
| Somchem S385 | <<locked>> | 96% | 43,642 psi | 85% | 2664 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 43,410 psi | 84% | 2569 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,042 psi | 70% | 2451 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 34,258 psi | 67% | 2457 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 42,279 psi | 82% | 2569 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 33,721 psi | 65% | 2454 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 88% | 30,748 psi | 60% | 2448 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,850 psi | 62% | 2379 fps | 96.9% |
| Winchester 760 | <<locked>> | 88% | 42,830 psi | 83% | 2674 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 92% | 28,572 psi | 55% | 2444 fps | 95.3% |
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 54 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 125gr | SUS-TAC HPT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,864 fps; across all powders the maximum-charge window runs from 1,719 fps to 2,864 fps. Accurate 3100 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 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, Alliant Reloder-23, Alliant Reloder-26 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 | SUS-TAC HPT 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.