Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 120gr | Barnes TTSX BT bullet and 53 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-17 and ReloadSwiss RS 62.
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% | 44,512 psi | 86% | 2657 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 41,568 psi | 81% | 2690 fps | 95.9% |
| Accurate 4064 | <<locked>> | 84% | 44,860 psi | 87% | 2703 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 44,063 psi | 86% | 2762 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 84% | 43,903 psi | 85% | 2680 fps | 98.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 44,396 psi | 86% | 2818 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 46,354 psi | 90% | 2753 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 82% | 43,874 psi | 85% | 2713 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 94% | 46,224 psi | 90% | 2831 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 88% | 43,584 psi | 85% | 2805 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,856 psi | 77% | 2723 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,875 psi | 87% | 2890 fps | 98.3% |
| Bofors RP3 | <<locked>> | 86% | 46,311 psi | 90% | 2759 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 84% | 44,280 psi | 86% | 2713 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 45,571 psi | 89% | 2762 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 44,947 psi | 87% | 2762 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,317 psi | 69% | 1765 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 46,137 psi | 90% | 2713 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 82% | 45,963 psi | 89% | 2687 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 45,890 psi | 89% | 2713 fps | 95.8% |
| IMR 4831 | <<locked>> | 94% | 45,266 psi | 88% | 2766 fps | 98.5% |
| IMR 4895 | <<locked>> | 82% | 44,976 psi | 87% | 2746 fps | 99.3% |
| Lovex S062 | <<locked>> | 84% | 45,992 psi | 89% | 2713 fps | 99.9% |
| Lovex S065 | <<locked>> | 90% | 45,469 psi | 88% | 2713 fps | 97.3% |
| Lovex S070 | <<locked>> | 92% | 46,093 psi | 90% | 2743 fps | 96.3% |
| Norma 203B | <<locked>> | 84% | 45,977 psi | 89% | 2753 fps | 99.4% |
| Norma URP | <<locked>> | 92% | 44,222 psi | 86% | 2762 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 84% | 46,093 psi | 90% | 2776 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 94% | 45,905 psi | 89% | 2805 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,042 psi | 70% | 1811 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 44,614 psi | 87% | 2694 fps | 96.3% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 46,499 psi | 90% | 2867 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 43,976 psi | 85% | 2785 fps | 98% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 43,932 psi | 85% | 2805 fps | 97.5% |
| Rottweil R 902 | <<locked>> | 82% | 44,875 psi | 87% | 2677 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 88% | 46,514 psi | 90% | 2756 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 45,469 psi | 88% | 2713 fps | 97.3% |
| Shooters World Precision | <<locked>> | 84% | 45,992 psi | 89% | 2713 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 92% | 46,093 psi | 90% | 2743 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 44,947 psi | 87% | 2759 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 46,166 psi | 90% | 2635 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 44,164 psi | 86% | 2707 fps | 99.4% |
| Somchem S365 | <<locked>> | 96% | 45,179 psi | 88% | 2822 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 44,657 psi | 87% | 2657 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 45,382 psi | 88% | 2667 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 45,237 psi | 88% | 2694 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 92% | 46,064 psi | 89% | 2759 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 82% | 43,526 psi | 85% | 2654 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 45,397 psi | 88% | 2762 fps | 98.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,830 psi | 85% | 2802 fps | 98.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 46,050 psi | 89% | 2740 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,665 psi | 69% | 2726 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 82% | 46,586 psi | 90% | 2753 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 2495 | <<locked>> | 80% | 41,408 psi | 80% | 2605 fps | 100% |
| Accurate 3100 | <<locked>> | 98% | 38,856 psi | 75% | 2635 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 39,189 psi | 76% | 2598 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,708 psi | 69% | 2585 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 38,493 psi | 75% | 2569 fps | 97.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,408 psi | 80% | 2753 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,130 psi | 74% | 2592 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,220 psi | 80% | 2661 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 84% | 33,649 psi | 65% | 2546 fps | 95.1% |
| Alliant Reloder-17 | 39.7 gr | 80% | 32,967 psi | 64% | 2556 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,922 psi | 60% | 2500 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 94% | 35,955 psi | 70% | 2687 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 37,884 psi | 74% | 2595 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 80% | 38,754 psi | 75% | 2598 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,776 psi | 56% | 2385 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,887 psi | 81% | 2703 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,455 psi | 51% | 1581 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,408 psi | 78% | 2602 fps | 98.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,975 psi | 83% | 2628 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 43,178 psi | 84% | 2657 fps | 95% |
| IMR 4831 | <<locked>> | 86% | 34,519 psi | 67% | 2543 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 42,235 psi | 82% | 2690 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 40,292 psi | 78% | 2608 fps | 99.3% |
| Lovex S065 | <<locked>> | 84% | 37,579 psi | 73% | 2549 fps | 95% |
| Lovex S070 | <<locked>> | 90% | 43,062 psi | 84% | 2684 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 40,567 psi | 79% | 2648 fps | 98.5% |
| Norma URP | <<locked>> | 84% | 33,663 psi | 65% | 2533 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 40,103 psi | 78% | 2657 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 40,321 psi | 78% | 2690 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,643 psi | 52% | 1614 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,945 psi | 81% | 2641 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,157 psi | 68% | 2625 fps | 99.5% |
| ReloadSwiss RS 62 | 42.6 gr | 86% | 35,433 psi | 69% | 2602 fps | 95.4% |
| ReloadSwiss RS 70 | 44.4 gr | 88% | 38,305 psi | 74% | 2677 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 42,163 psi | 82% | 2625 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 35,389 psi | 69% | 2533 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 37,579 psi | 73% | 2549 fps | 95% |
| Shooters World Precision | <<locked>> | 80% | 40,292 psi | 78% | 2608 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 43,062 psi | 84% | 2684 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,724 psi | 71% | 2589 fps | 97.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,116 psi | 74% | 2493 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 36,303 psi | 71% | 2543 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 26,165 psi | 51% | 2359 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 41,829 psi | 81% | 2608 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,351 psi | 82% | 2615 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,519 psi | 67% | 2477 fps | 98.6% |
| Vihtavuori N160 | <<locked>> | 84% | 35,143 psi | 68% | 2536 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 40,930 psi | 79% | 2608 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 34,621 psi | 67% | 2536 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 92% | 33,431 psi | 65% | 2575 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,603 psi | 59% | 2402 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 94% | 29,051 psi | 56% | 2513 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,497 psi | 84% | 2697 fps | 99.4% |
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 53 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 120gr | Barnes TTSX BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,890 fps; across all powders the maximum-charge window runs from 1,765 fps to 2,890 fps. Accurate 3100 gives the best case fill at 100 %, and 53 of the 53 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 120.0 gr projectile in 0.264" calls for a 1:9.0 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. ReloadSwiss RS 70, Alliant Reloder-17, ReloadSwiss RS 62 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 120gr | Barnes TTSX BT 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.