Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 139gr | Norma PlastSpitz 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, Norma MRP 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 44,425 psi | 86% | 2569 fps | 98.3% |
| Accurate 4350 | <<locked>> | 86% | 43,468 psi | 84% | 2566 fps | 99.3% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,918 psi | 87% | 2602 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 44,947 psi | 87% | 2628 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 84% | 44,962 psi | 87% | 2641 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,396 psi | 86% | 2641 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 98% | 44,744 psi | 87% | 2641 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,916 psi | 81% | 2618 fps | 98.6% |
| Alliant Reloder-26 | <<locked>> | 94% | 43,859 psi | 85% | 2697 fps | 99.4% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,528 psi | 90% | 2677 fps | 96.4% |
| Bofors RP5 | <<locked>> | 96% | 44,396 psi | 86% | 2641 fps | 96% |
| Bofors RP7 | <<locked>> | 84% | 45,092 psi | 88% | 2526 fps | 97% |
| Hodgdon H414 | <<locked>> | 86% | 45,759 psi | 89% | 2615 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 84% | 46,050 psi | 89% | 2579 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 44,773 psi | 87% | 2562 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 45,005 psi | 87% | 2635 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,143 psi | 70% | 1657 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 45,571 psi | 89% | 2556 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 82% | 43,772 psi | 85% | 2503 fps | 97.2% |
| IMR 4831 | <<locked>> | 88% | 44,425 psi | 86% | 2569 fps | 99.5% |
| Lovex S065 | <<locked>> | 86% | 46,572 psi | 90% | 2556 fps | 98.9% |
| Lovex S070 | <<locked>> | 86% | 44,730 psi | 87% | 2543 fps | 97.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,322 psi | 82% | 2533 fps | 97.9% |
| Norma 204 | <<locked>> | 88% | 45,397 psi | 88% | 2589 fps | 95.8% |
| Norma MRP | <<locked>> | 94% | 43,729 psi | 85% | 2657 fps | 97.3% |
| Norma URP | <<locked>> | 88% | 45,963 psi | 89% | 2608 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 88% | 44,570 psi | 87% | 2602 fps | 98.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,208 psi | 86% | 2618 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,057 psi | 72% | 1699 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 44,628 psi | 87% | 2638 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 46,340 psi | 90% | 2641 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 45,020 psi | 87% | 2654 fps | 99.3% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,741 psi | 79% | 2625 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 82% | 45,310 psi | 88% | 2546 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 46,238 psi | 90% | 2628 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 84% | 45,092 psi | 88% | 2526 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 86% | 46,572 psi | 90% | 2556 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 86% | 44,730 psi | 87% | 2543 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 46,412 psi | 90% | 2598 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 45,992 psi | 89% | 2507 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,818 psi | 89% | 2625 fps | 96.4% |
| Somchem S355 | <<locked>> | 82% | 45,440 psi | 88% | 2539 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 44,701 psi | 87% | 2615 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 44,135 psi | 86% | 2562 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 84% | 46,369 psi | 90% | 2523 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 44,773 psi | 87% | 2556 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 98% | 46,267 psi | 90% | 2589 fps | 96.9% |
| Vihtavuori N550 | <<locked>> | 86% | 44,063 psi | 86% | 2559 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 94% | 44,222 psi | 86% | 2618 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 43,903 psi | 85% | 2526 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 45,759 psi | 89% | 2615 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,134 psi | 84% | 2743 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>> | 88% | 34,011 psi | 66% | 2362 fps | 95.4% |
| Accurate 4350 | <<locked>> | 80% | 35,346 psi | 69% | 2402 fps | 97.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 42,032 psi | 82% | 2546 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,780 psi | 68% | 2411 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,189 psi | 76% | 2533 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 41,524 psi | 81% | 2582 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,469 psi | 49% | 2182 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,489 psi | 63% | 2392 fps | 95.1% |
| Alliant Reloder-26 | 43.3 gr | 84% | 30,937 psi | 60% | 2395 fps | 95.4% |
| Bofors RP15 | <<locked>> | 98% | 43,497 psi | 84% | 2621 fps | 95.6% |
| Bofors RP5 | <<locked>> | 94% | 41,524 psi | 81% | 2582 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 39,740 psi | 77% | 2421 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 37,362 psi | 73% | 2444 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 80% | 40,611 psi | 79% | 2470 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,387 psi | 63% | 2316 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 82% | 39,117 psi | 76% | 2513 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,064 psi | 53% | 1480 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 37,913 psi | 74% | 2405 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,263 psi | 80% | 2454 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 34,214 psi | 66% | 2362 fps | 97.4% |
| Lovex S065 | <<locked>> | 80% | 38,754 psi | 75% | 2405 fps | 97.3% |
| Lovex S070 | <<locked>> | 80% | 36,912 psi | 72% | 2385 fps | 95.5% |
| Lovex S071 | <<locked>> | 94% | 34,983 psi | 68% | 2382 fps | 95.8% |
| Norma 204 | <<locked>> | 86% | 42,714 psi | 83% | 2539 fps | 95% |
| Norma MRP | 45 gr | 90% | 38,174 psi | 74% | 2543 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 35,360 psi | 69% | 2402 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 80% | 34,345 psi | 67% | 2385 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 98% | 41,162 psi | 80% | 2556 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,673 psi | 54% | 1519 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,640 psi | 81% | 2585 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,157 psi | 68% | 2421 fps | 97.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 34,243 psi | 67% | 2421 fps | 96.4% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 37,840 psi | 73% | 2556 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 42,322 psi | 82% | 2493 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 92% | 43,163 psi | 84% | 2572 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 39,740 psi | 77% | 2421 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,754 psi | 75% | 2405 fps | 97.3% |
| Shooters World SW4350 | <<locked>> | 80% | 36,912 psi | 72% | 2385 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,410 psi | 84% | 2546 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,840 psi | 73% | 2349 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,743 psi | 83% | 2566 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 42,772 psi | 83% | 2493 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 31,836 psi | 62% | 2359 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 38,566 psi | 75% | 2454 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 40,756 psi | 79% | 2428 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,680 psi | 71% | 2398 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 94% | 40,364 psi | 78% | 2480 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 36,332 psi | 71% | 2405 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 27,775 psi | 54% | 2254 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,100 psi | 70% | 2379 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 37,594 psi | 73% | 2451 fps | 95.6% |
| Winchester StaBALL HD | 41.6 gr | 84% | 25,570 psi | 50% | 2260 fps | 95.8% |
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 | 139gr | Norma PlastSpitz. Winchester StaBALL HD delivers the highest muzzle velocity at 2,743 fps; across all powders the maximum-charge window runs from 1,657 fps to 2,743 fps. Alliant Reloder-25 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 139.0 gr projectile in 0.264" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Bofors RP15, Hodgdon TrailBoss 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, Norma MRP, Winchester StaBALL HD rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 139gr | Norma PlastSpitz 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.