Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 139gr | Norma VULKAN bullet and 53 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and Winchester StaBALL HD.
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 3100 | <<locked>> | 96% | 45,919 psi | 89% | 2598 fps | 98.7% |
| Accurate 4350 | <<locked>> | 86% | 44,817 psi | 87% | 2595 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 46,064 psi | 89% | 2628 fps | 96.3% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 45,977 psi | 89% | 2628 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 45,890 psi | 89% | 2651 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 84% | 46,224 psi | 90% | 2671 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 45,411 psi | 88% | 2621 fps | 96.3% |
| Alliant Reloder-22 | <<locked>> | 96% | 45,716 psi | 89% | 2671 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 46,151 psi | 90% | 2671 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,033 psi | 84% | 2648 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 45,179 psi | 88% | 2726 fps | 99.6% |
| Bofors RP15 | <<locked>> | 98% | 44,788 psi | 87% | 2651 fps | 96.1% |
| Bofors RP5 | <<locked>> | 96% | 45,716 psi | 89% | 2671 fps | 96.5% |
| Bofors RP7 | <<locked>> | 84% | 45,963 psi | 89% | 2549 fps | 97.4% |
| Hodgdon H414 | <<locked>> | 84% | 43,990 psi | 85% | 2589 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 82% | 44,005 psi | 85% | 2546 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 46,093 psi | 90% | 2589 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 46,021 psi | 89% | 2661 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,318 psi | 71% | 1667 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 43,787 psi | 85% | 2530 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 82% | 44,657 psi | 87% | 2526 fps | 97.5% |
| IMR 4831 | <<locked>> | 88% | 45,658 psi | 89% | 2595 fps | 99.7% |
| Lovex S065 | <<locked>> | 84% | 44,802 psi | 87% | 2530 fps | 98.7% |
| Lovex S070 | <<locked>> | 86% | 45,585 psi | 89% | 2566 fps | 98% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,758 psi | 85% | 2562 fps | 98.3% |
| Norma MRP | <<locked>> | 94% | 44,991 psi | 87% | 2687 fps | 97.8% |
| Norma URP | <<locked>> | 86% | 44,164 psi | 86% | 2585 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 88% | 46,035 psi | 89% | 2635 fps | 98.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,281 psi | 88% | 2644 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,927 psi | 72% | 1706 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 45,948 psi | 89% | 2667 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 44,512 psi | 86% | 2615 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 46,369 psi | 90% | 2687 fps | 99.5% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,916 psi | 81% | 2664 fps | 97% |
| Rottweil R 903 | <<locked>> | 82% | 46,383 psi | 90% | 2569 fps | 100% |
| Rottweil R 905 | <<locked>> | 92% | 44,628 psi | 87% | 2608 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 84% | 45,963 psi | 89% | 2549 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 84% | 44,802 psi | 87% | 2530 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 86% | 45,585 psi | 89% | 2566 fps | 98% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 44,135 psi | 86% | 2480 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 44,222 psi | 86% | 2602 fps | 96.1% |
| Somchem S355 | <<locked>> | 82% | 46,441 psi | 90% | 2566 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 46,079 psi | 89% | 2644 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 45,179 psi | 88% | 2589 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 82% | 44,585 psi | 87% | 2500 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 46,006 psi | 89% | 2582 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 96% | 44,469 psi | 86% | 2566 fps | 96.6% |
| Vihtavuori N550 | <<locked>> | 86% | 45,223 psi | 88% | 2585 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 94% | 45,469 psi | 88% | 2644 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 45,208 psi | 88% | 2556 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 43,990 psi | 85% | 2589 fps | 97.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,324 psi | 86% | 2772 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 44,585 psi | 87% | 2572 fps | 95.9% |
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>> | 86% | 32,750 psi | 64% | 2336 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 36,361 psi | 71% | 2428 fps | 98% |
| ADI AR 2209 | <<locked>> | 90% | 43,105 psi | 84% | 2572 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,076 psi | 84% | 2572 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,650 psi | 69% | 2441 fps | 98.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,147 psi | 78% | 2556 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,569 psi | 83% | 2566 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,786 psi | 83% | 2615 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,150 psi | 51% | 2208 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,504 psi | 65% | 2428 fps | 95.8% |
| Alliant Reloder-26 | 44.3 gr | 84% | 31,821 psi | 62% | 2425 fps | 96% |
| Bofors RP15 | <<locked>> | 96% | 42,206 psi | 82% | 2602 fps | 95.3% |
| Bofors RP5 | <<locked>> | 94% | 42,786 psi | 83% | 2615 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 40,640 psi | 79% | 2448 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 38,261 psi | 74% | 2470 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 80% | 41,263 psi | 80% | 2493 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,054 psi | 64% | 2339 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 80% | 37,347 psi | 73% | 2480 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,137 psi | 53% | 1490 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 38,740 psi | 75% | 2431 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,148 psi | 82% | 2477 fps | 96.9% |
| IMR 4831 | <<locked>> | 80% | 35,157 psi | 68% | 2388 fps | 97.8% |
| Lovex S065 | <<locked>> | 80% | 39,653 psi | 77% | 2431 fps | 97.7% |
| Lovex S070 | <<locked>> | 80% | 37,826 psi | 73% | 2411 fps | 96% |
| Lovex S071 | <<locked>> | 92% | 33,910 psi | 66% | 2365 fps | 95.5% |
| Norma MRP | 45 gr | 88% | 36,637 psi | 71% | 2510 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 36,332 psi | 71% | 2428 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 80% | 35,143 psi | 68% | 2411 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 96% | 39,407 psi | 77% | 2530 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,746 psi | 54% | 1526 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,656 psi | 83% | 2608 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,100 psi | 70% | 2448 fps | 97.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,230 psi | 68% | 2451 fps | 97% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,001 psi | 76% | 2595 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 43,381 psi | 84% | 2520 fps | 100% |
| Rottweil R 905 | <<locked>> | 90% | 41,684 psi | 81% | 2549 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 40,640 psi | 79% | 2448 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,653 psi | 77% | 2431 fps | 97.7% |
| Shooters World SW4350 | <<locked>> | 80% | 37,826 psi | 73% | 2411 fps | 96% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,711 psi | 75% | 2375 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,292 psi | 80% | 2546 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 43,830 psi | 85% | 2520 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 32,750 psi | 64% | 2385 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 39,624 psi | 77% | 2480 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 41,727 psi | 81% | 2451 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,623 psi | 73% | 2425 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 94% | 41,626 psi | 81% | 2510 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 37,202 psi | 72% | 2428 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 28,674 psi | 56% | 2280 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,811 psi | 71% | 2398 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 38,522 psi | 75% | 2477 fps | 96% |
| Winchester StaBALL HD | 41.5 gr | 82% | 24,511 psi | 48% | 2228 fps | 95.1% |
| Winchester Supreme 780 | <<locked>> | 92% | 41,655 psi | 81% | 2516 fps | 95.1% |
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 | 139gr | Norma VULKAN. Winchester StaBALL HD delivers the highest muzzle velocity at 2,772 fps; across all powders the maximum-charge window runs from 1,667 fps to 2,772 fps. Alliant Reloder-25 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 71–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.264" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Hodgdon TrailBoss, Lovex S071 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. Norma MRP, Alliant Reloder-26, Winchester StaBALL HD rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 139gr | Norma VULKAN 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.