Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 130gr | Barnes TSX S bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 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 2700 | <<locked>> | 82% | 46,514 psi | 90% | 2592 fps | 96.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,020 psi | 87% | 2661 fps | 97.7% |
| Accurate 4064 | <<locked>> | 82% | 44,846 psi | 87% | 2595 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 44,382 psi | 86% | 2667 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 84% | 46,267 psi | 90% | 2625 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 46,195 psi | 90% | 2644 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 46,456 psi | 90% | 2661 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 92% | 46,224 psi | 90% | 2733 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 86% | 43,453 psi | 84% | 2700 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,801 psi | 83% | 2690 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,362 psi | 73% | 2585 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 98% | 44,802 psi | 87% | 2795 fps | 99% |
| Bofors RP3 | <<locked>> | 84% | 46,282 psi | 90% | 2657 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 44,121 psi | 86% | 2612 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 88% | 43,961 psi | 85% | 2661 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 45,774 psi | 89% | 2664 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,853 psi | 70% | 1703 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 45,730 psi | 89% | 2608 fps | 99.5% |
| IMR 4350 | <<locked>> | 90% | 44,469 psi | 86% | 2612 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 86% | 45,556 psi | 88% | 2612 fps | 96.7% |
| IMR 4831 | <<locked>> | 92% | 45,223 psi | 88% | 2667 fps | 99.1% |
| Lovex S062 | <<locked>> | 82% | 45,672 psi | 89% | 2608 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 44,991 psi | 87% | 2605 fps | 97.9% |
| Lovex S070 | <<locked>> | 90% | 45,745 psi | 89% | 2638 fps | 97.1% |
| Norma 203B | <<locked>> | 82% | 45,774 psi | 89% | 2648 fps | 99.7% |
| Norma MRP | <<locked>> | 98% | 44,831 psi | 87% | 2756 fps | 96.6% |
| Norma URP | <<locked>> | 90% | 44,063 psi | 86% | 2661 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 82% | 45,832 psi | 89% | 2667 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 92% | 45,847 psi | 89% | 2703 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,347 psi | 71% | 1742 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 44,425 psi | 86% | 2598 fps | 97.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 46,311 psi | 90% | 2756 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 44,135 psi | 86% | 2687 fps | 98.7% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 46,557 psi | 90% | 2762 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 86% | 46,514 psi | 90% | 2654 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 44,991 psi | 87% | 2605 fps | 97.9% |
| Shooters World Precision | <<locked>> | 82% | 45,672 psi | 89% | 2608 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 45,745 psi | 89% | 2638 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 44,701 psi | 87% | 2651 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 45,672 psi | 89% | 2523 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 44,570 psi | 87% | 2556 fps | 96.6% |
| Somchem S355 | <<locked>> | 84% | 44,019 psi | 85% | 2602 fps | 99.7% |
| Somchem S365 | <<locked>> | 94% | 45,310 psi | 88% | 2717 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 44,918 psi | 87% | 2654 fps | 96.1% |
| Vihtavuori N150 | <<locked>> | 86% | 45,078 psi | 88% | 2589 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 46,151 psi | 90% | 2661 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 82% | 46,325 psi | 90% | 2598 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 45,266 psi | 88% | 2664 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 98% | 44,208 psi | 86% | 2707 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 45,745 psi | 89% | 2638 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 44,251 psi | 86% | 2667 fps | 96.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,101 psi | 74% | 2710 fps | 99.9% |
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 2700 | <<locked>> | 80% | 43,468 psi | 84% | 2536 fps | 95.4% |
| Accurate 3100 | <<locked>> | 94% | 36,550 psi | 71% | 2493 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 42,076 psi | 82% | 2549 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,125 psi | 60% | 2382 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 40,872 psi | 79% | 2523 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,770 psi | 79% | 2546 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,671 psi | 85% | 2608 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,473 psi | 61% | 2398 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,143 psi | 68% | 2523 fps | 98.5% |
| Alliant Reloder-23 | <<locked>> | 88% | 28,979 psi | 56% | 2359 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 98% | 35,157 psi | 68% | 2530 fps | 95% |
| Alliant Reloder-26 | 45.6 gr | 90% | 33,649 psi | 65% | 2539 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 40,393 psi | 78% | 2549 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 80% | 41,133 psi | 80% | 2556 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 86% | 41,263 psi | 80% | 2608 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,732 psi | 56% | 2300 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,614 psi | 52% | 1519 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,960 psi | 83% | 2559 fps | 99.2% |
| IMR 4350 | <<locked>> | 88% | 41,539 psi | 81% | 2556 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,306 psi | 78% | 2510 fps | 95.2% |
| IMR 4831 | <<locked>> | 82% | 32,503 psi | 63% | 2402 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 42,598 psi | 83% | 2552 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 35,172 psi | 68% | 2405 fps | 95.2% |
| Lovex S070 | <<locked>> | 86% | 40,451 psi | 79% | 2536 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 43,004 psi | 84% | 2595 fps | 99.4% |
| Norma MRP | <<locked>> | 96% | 41,814 psi | 81% | 2694 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 31,604 psi | 61% | 2388 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 42,743 psi | 83% | 2612 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 37,521 psi | 73% | 2536 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,861 psi | 52% | 1552 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,510 psi | 81% | 2539 fps | 96.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,449 psi | 73% | 2585 fps | 100% |
| ReloadSwiss RS 62 | 40.5 gr | 82% | 33,301 psi | 65% | 2457 fps | 95.7% |
| ReloadSwiss RS 70 | 42.1 gr | 84% | 35,302 psi | 69% | 2516 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 38,043 psi | 74% | 2493 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,172 psi | 68% | 2405 fps | 95.2% |
| Shooters World Precision | <<locked>> | 80% | 42,598 psi | 83% | 2552 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 40,451 psi | 79% | 2536 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,131 psi | 76% | 2546 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,176 psi | 78% | 2434 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 39,044 psi | 76% | 2451 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 38,783 psi | 75% | 2500 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 28,210 psi | 55% | 2339 fps | 97.4% |
| Somchem S385 | <<locked>> | 94% | 41,901 psi | 81% | 2595 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 36,941 psi | 72% | 2438 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 32,967 psi | 64% | 2392 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 43,265 psi | 84% | 2549 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,372 psi | 63% | 2388 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 86% | 29,457 psi | 57% | 2382 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,445 psi | 63% | 2365 fps | 97.8% |
| Winchester 760 | <<locked>> | 86% | 41,263 psi | 80% | 2608 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,398 psi | 53% | 2385 fps | 95.6% |
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 52 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 130gr | Barnes TSX S. Alliant Reloder-26 delivers the highest muzzle velocity at 2,795 fps; across all powders the maximum-charge window runs from 1,703 fps to 2,795 fps. Accurate 3100 gives the best case fill at 100 %, and 52 of the 52 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 130.0 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-25 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, ReloadSwiss RS 70, ReloadSwiss RS 62 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 130gr | Barnes TSX S 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.