Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 130gr | Barnes TSX BT 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 3100ᴾ | <<locked>> | 100% | 45,208 psi | 88% | 2664 fps | 97.8% |
| Accurate 4064 | <<locked>> | 82% | 44,715 psi | 87% | 2595 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 44,556 psi | 87% | 2671 fps | 99% |
| ADI AR 2208 | <<locked>> | 84% | 46,456 psi | 90% | 2628 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 46,412 psi | 90% | 2651 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 46,383 psi | 90% | 2736 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 88% | 46,456 psi | 90% | 2756 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,641 psi | 83% | 2687 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,507 psi | 73% | 2589 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 44,991 psi | 87% | 2799 fps | 99% |
| Bofors RP3 | <<locked>> | 84% | 46,514 psi | 90% | 2661 fps | 100% |
| Bofors RP7 | <<locked>> | 86% | 43,845 psi | 85% | 2579 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 82% | 44,019 psi | 85% | 2612 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 88% | 44,164 psi | 86% | 2664 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 45,977 psi | 89% | 2667 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,781 psi | 69% | 1703 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 45,629 psi | 89% | 2605 fps | 99.5% |
| IMR 4350 | <<locked>> | 90% | 44,338 psi | 86% | 2608 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 45,730 psi | 89% | 2615 fps | 96.7% |
| IMR 4831 | <<locked>> | 92% | 45,426 psi | 88% | 2671 fps | 99.2% |
| Lovex S062 | <<locked>> | 82% | 45,542 psi | 88% | 2605 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 45,165 psi | 88% | 2612 fps | 98% |
| Lovex S070 | <<locked>> | 90% | 45,948 psi | 89% | 2644 fps | 97.2% |
| Norma 203B | <<locked>> | 82% | 45,992 psi | 89% | 2651 fps | 99.7% |
| Norma MRP | <<locked>> | 98% | 44,701 psi | 87% | 2756 fps | 96.6% |
| Norma URP | <<locked>> | 90% | 44,237 psi | 86% | 2664 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 82% | 46,035 psi | 89% | 2671 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 92% | 45,992 psi | 89% | 2710 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,274 psi | 70% | 1742 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 44,295 psi | 86% | 2595 fps | 97.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 46,151 psi | 90% | 2753 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 44,324 psi | 86% | 2690 fps | 98.7% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 43,613 psi | 85% | 2707 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 86% | 46,383 psi | 90% | 2651 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 86% | 43,845 psi | 85% | 2579 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 45,165 psi | 88% | 2612 fps | 98% |
| Shooters World Precision | <<locked>> | 82% | 45,542 psi | 88% | 2605 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 45,948 psi | 89% | 2644 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 44,875 psi | 87% | 2657 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 45,847 psi | 89% | 2526 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 44,773 psi | 87% | 2559 fps | 96.7% |
| Somchem S355 | <<locked>> | 84% | 44,179 psi | 86% | 2605 fps | 99.8% |
| Somchem S365 | <<locked>> | 94% | 45,513 psi | 88% | 2723 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 45,092 psi | 88% | 2657 fps | 96.1% |
| Vihtavuori N150 | <<locked>> | 86% | 44,933 psi | 87% | 2585 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 46,325 psi | 90% | 2667 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 82% | 46,195 psi | 90% | 2598 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 45,426 psi | 88% | 2667 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 98% | 44,382 psi | 86% | 2710 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 45,934 psi | 89% | 2641 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 44,164 psi | 86% | 2664 fps | 96.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,247 psi | 74% | 2713 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 3100 | <<locked>> | 94% | 36,405 psi | 71% | 2493 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 41,974 psi | 82% | 2549 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,038 psi | 60% | 2379 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 40,770 psi | 79% | 2523 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,640 psi | 79% | 2546 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,386 psi | 61% | 2398 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,288 psi | 69% | 2526 fps | 98.5% |
| Alliant Reloder-23 | <<locked>> | 86% | 27,354 psi | 53% | 2310 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 98% | 35,273 psi | 69% | 2533 fps | 95.1% |
| Alliant Reloder-26 | 45.6 gr | 90% | 33,547 psi | 65% | 2539 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 40,306 psi | 78% | 2546 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 41,220 psi | 80% | 2526 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 41,336 psi | 80% | 2559 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 86% | 41,147 psi | 80% | 2608 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,863 psi | 56% | 2303 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,571 psi | 52% | 1519 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,844 psi | 83% | 2556 fps | 99.2% |
| IMR 4350 | <<locked>> | 88% | 41,684 psi | 81% | 2559 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,234 psi | 78% | 2507 fps | 95.2% |
| IMR 4831 | <<locked>> | 82% | 32,430 psi | 63% | 2402 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 42,772 psi | 83% | 2556 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 35,056 psi | 68% | 2402 fps | 95.1% |
| Lovex S070 | <<locked>> | 86% | 40,335 psi | 78% | 2533 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 42,873 psi | 83% | 2595 fps | 99.4% |
| Norma MRP | <<locked>> | 96% | 41,669 psi | 81% | 2694 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 31,517 psi | 61% | 2385 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 42,946 psi | 83% | 2615 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 37,666 psi | 73% | 2543 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,079 psi | 53% | 1558 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,655 psi | 81% | 2543 fps | 96.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,637 psi | 73% | 2589 fps | 100% |
| ReloadSwiss RS 62 | 40.5 gr | 82% | 33,199 psi | 64% | 2457 fps | 95.6% |
| ReloadSwiss RS 70 | 42.2 gr | 84% | 35,462 psi | 69% | 2523 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 37,913 psi | 74% | 2493 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 84% | 41,220 psi | 80% | 2526 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,056 psi | 68% | 2402 fps | 95.1% |
| Shooters World Precision | <<locked>> | 80% | 42,772 psi | 83% | 2556 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 40,335 psi | 78% | 2533 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,305 psi | 76% | 2549 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,350 psi | 78% | 2438 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 39,175 psi | 76% | 2451 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 38,682 psi | 75% | 2497 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 28,137 psi | 55% | 2339 fps | 97.4% |
| Somchem S385 | <<locked>> | 94% | 42,047 psi | 82% | 2602 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 36,840 psi | 72% | 2434 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 32,880 psi | 64% | 2392 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 43,468 psi | 84% | 2552 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,532 psi | 63% | 2395 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 86% | 29,631 psi | 58% | 2385 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,576 psi | 63% | 2369 fps | 97.9% |
| Winchester 760 | <<locked>> | 86% | 41,437 psi | 80% | 2612 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,311 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 BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,799 fps; across all powders the maximum-charge window runs from 1,703 fps to 2,799 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 69–90 %, 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 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.