Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 139gr | Fox Classic Hunter bullet and 57 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 Norma MRP.
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% | 45,745 psi | 89% | 2582 fps | 98.3% |
| Accurate 4064 | <<locked>> | 82% | 45,672 psi | 89% | 2513 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 45,179 psi | 88% | 2589 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 82% | 44,164 psi | 86% | 2493 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 44,208 psi | 86% | 2516 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 43,932 psi | 85% | 2595 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 86% | 44,179 psi | 86% | 2621 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 46,238 psi | 90% | 2612 fps | 95.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 46,108 psi | 90% | 2657 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,308 psi | 84% | 2608 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,130 psi | 74% | 2520 fps | 97.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 45,513 psi | 88% | 2720 fps | 99.5% |
| Bofors RP3 | <<locked>> | 82% | 44,048 psi | 86% | 2523 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 46,108 psi | 90% | 2657 fps | 96% |
| Bofors RP7 | <<locked>> | 86% | 44,614 psi | 87% | 2503 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 82% | 44,788 psi | 87% | 2533 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 88% | 44,701 psi | 87% | 2582 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 86% | 45,411 psi | 88% | 2552 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 43,540 psi | 85% | 2533 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 44,193 psi | 86% | 2605 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,940 psi | 70% | 1634 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 46,427 psi | 90% | 2526 fps | 99.8% |
| IMR 4350 | <<locked>> | 90% | 45,092 psi | 88% | 2533 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 46,209 psi | 90% | 2533 fps | 97.4% |
| IMR 4831 | <<locked>> | 92% | 46,050 psi | 89% | 2589 fps | 99.5% |
| Lovex S062 | <<locked>> | 82% | 46,412 psi | 90% | 2523 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 45,759 psi | 89% | 2530 fps | 98.5% |
| Lovex S070 | <<locked>> | 90% | 46,383 psi | 90% | 2559 fps | 97.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 38,000 psi | 74% | 2441 fps | 96.4% |
| Norma MRP | <<locked>> | 98% | 45,339 psi | 88% | 2677 fps | 97.3% |
| Norma URP | <<locked>> | 90% | 44,715 psi | 87% | 2579 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 90% | 43,642 psi | 85% | 2572 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,492 psi | 71% | 1670 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 45,092 psi | 88% | 2520 fps | 97.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 43,758 psi | 85% | 2615 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 44,846 psi | 87% | 2605 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 44,121 psi | 86% | 2625 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 84% | 44,266 psi | 86% | 2520 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 96% | 45,136 psi | 88% | 2598 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 86% | 44,614 psi | 87% | 2503 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 45,759 psi | 89% | 2530 fps | 98.5% |
| Shooters World Precision | <<locked>> | 82% | 46,412 psi | 90% | 2523 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 46,383 psi | 90% | 2559 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 45,527 psi | 88% | 2572 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 46,325 psi | 90% | 2438 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 45,397 psi | 88% | 2484 fps | 97.3% |
| Somchem S355 | <<locked>> | 84% | 44,570 psi | 87% | 2516 fps | 99.9% |
| Somchem S365 | <<locked>> | 94% | 46,354 psi | 90% | 2638 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 45,759 psi | 89% | 2579 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 86% | 45,788 psi | 89% | 2507 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 43,903 psi | 85% | 2530 fps | 99.1% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 44,860 psi | 87% | 2552 fps | 96.1% |
| Vihtavuori N550 | <<locked>> | 90% | 46,079 psi | 89% | 2582 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 98% | 45,063 psi | 88% | 2628 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 46,485 psi | 90% | 2559 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 45,005 psi | 87% | 2589 fps | 97.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,856 psi | 75% | 2641 fps | 100% |
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>> | 92% | 34,664 psi | 67% | 2372 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 42,743 psi | 83% | 2467 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,821 psi | 62% | 2316 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 80% | 41,394 psi | 80% | 2444 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,408 psi | 80% | 2467 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,937 psi | 62% | 2333 fps | 96.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,708 psi | 69% | 2448 fps | 99.1% |
| Alliant Reloder-19 | <<locked>> | 94% | 43,381 psi | 84% | 2559 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 98% | 43,163 psi | 84% | 2602 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 84% | 25,976 psi | 50% | 2192 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,591 psi | 65% | 2408 fps | 95.1% |
| Alliant Reloder-26 | 42.9 gr | 88% | 31,894 psi | 62% | 2415 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 41,220 psi | 80% | 2474 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 43,163 psi | 84% | 2602 fps | 95.2% |
| Bofors RP7 | <<locked>> | 82% | 39,204 psi | 76% | 2398 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 41,626 psi | 81% | 2474 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 84% | 39,218 psi | 76% | 2477 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 84% | 42,598 psi | 83% | 2497 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,399 psi | 57% | 2238 fps | 97.1% |
| Hodgdon Superformance | <<locked>> | 86% | 41,133 psi | 80% | 2543 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,643 psi | 52% | 1453 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,511 psi | 85% | 2474 fps | 99.5% |
| IMR 4350 | <<locked>> | 86% | 39,697 psi | 77% | 2431 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,203 psi | 74% | 2379 fps | 95.1% |
| IMR 4831 | <<locked>> | 80% | 30,821 psi | 60% | 2277 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 43,526 psi | 85% | 2477 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 35,679 psi | 69% | 2329 fps | 96% |
| Lovex S070 | <<locked>> | 84% | 38,551 psi | 75% | 2411 fps | 95.7% |
| Lovex S071 | <<locked>> | 98% | 35,462 psi | 69% | 2388 fps | 95.6% |
| Norma MRP | 44.5 gr | 94% | 39,755 psi | 77% | 2562 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 32,198 psi | 63% | 2323 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 84% | 35,708 psi | 69% | 2411 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,209 psi | 53% | 1493 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,047 psi | 82% | 2461 fps | 97.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,072 psi | 74% | 2507 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,531 psi | 61% | 2333 fps | 95.6% |
| ReloadSwiss RS 70 | 39.6 gr | 82% | 33,605 psi | 65% | 2392 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 38,711 psi | 75% | 2418 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 94% | 42,192 psi | 82% | 2543 fps | 95% |
| Rottweil R 907 | <<locked>> | 82% | 39,204 psi | 76% | 2398 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,679 psi | 69% | 2329 fps | 96% |
| Shooters World Precision | <<locked>> | 80% | 43,526 psi | 85% | 2477 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 38,551 psi | 75% | 2411 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,711 psi | 77% | 2467 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,872 psi | 79% | 2352 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,086 psi | 72% | 2323 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 39,392 psi | 77% | 2421 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 28,776 psi | 56% | 2277 fps | 98.2% |
| Somchem S385 | <<locked>> | 92% | 39,842 psi | 77% | 2470 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 37,550 psi | 73% | 2362 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 33,591 psi | 65% | 2323 fps | 96.6% |
| Vihtavuori N165 | <<locked>> | 98% | 41,989 psi | 82% | 2500 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 32,851 psi | 64% | 2320 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 84% | 28,065 psi | 55% | 2264 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,982 psi | 64% | 2300 fps | 98.5% |
| Winchester 760 | <<locked>> | 84% | 39,218 psi | 76% | 2477 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 88% | 26,049 psi | 51% | 2267 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 57 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 139gr | Fox Classic Hunter. Alliant Reloder-26 delivers the highest muzzle velocity at 2,720 fps; across all powders the maximum-charge window runs from 1,634 fps to 2,720 fps. Accurate 3100 gives the best case fill at 100 %, and 57 of the 57 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 139.0 gr projectile in 0.264" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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, Norma MRP rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 139gr | Fox Classic Hunter 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.