Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 140gr | Speer Impact bullet and 51 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 ReloadSwiss RS 70.
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>> | 98% | 46,311 psi | 90% | 2585 fps | 98.6% |
| Accurate 4350 | <<locked>> | 88% | 45,324 psi | 88% | 2582 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 82% | 46,427 psi | 90% | 2530 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 88% | 44,005 psi | 85% | 2595 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 84% | 43,990 psi | 85% | 2612 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,079 psi | 89% | 2608 fps | 96.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 46,267 psi | 90% | 2657 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,528 psi | 90% | 2657 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,828 psi | 79% | 2579 fps | 98.2% |
| Alliant Reloder-26 | <<locked>> | 96% | 45,774 psi | 89% | 2717 fps | 99.6% |
| Bofors RP15ᴾ | <<locked>> | 100% | 45,252 psi | 88% | 2638 fps | 96% |
| Bofors RP5 | <<locked>> | 98% | 46,267 psi | 90% | 2657 fps | 96.4% |
| Bofors RP7 | <<locked>> | 84% | 44,106 psi | 86% | 2490 fps | 96.7% |
| Hodgdon H414 | <<locked>> | 86% | 44,527 psi | 86% | 2575 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 84% | 45,107 psi | 88% | 2543 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 43,772 psi | 85% | 2530 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 44,048 psi | 86% | 2598 fps | 97% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,172 psi | 70% | 1640 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 44,744 psi | 87% | 2523 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 45,774 psi | 89% | 2523 fps | 97.5% |
| IMR 4831 | <<locked>> | 90% | 46,282 psi | 90% | 2585 fps | 99.6% |
| Lovex S065 | <<locked>> | 86% | 45,600 psi | 89% | 2520 fps | 98.7% |
| Lovex S070 | <<locked>> | 88% | 46,499 psi | 90% | 2556 fps | 98% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,234 psi | 80% | 2497 fps | 97.6% |
| Norma MRP | <<locked>> | 96% | 45,542 psi | 88% | 2677 fps | 97.7% |
| Norma URP | <<locked>> | 88% | 44,933 psi | 87% | 2575 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 90% | 46,485 psi | 90% | 2618 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,796 psi | 71% | 1680 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 43,613 psi | 85% | 2605 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 45,107 psi | 88% | 2605 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 44,019 psi | 85% | 2618 fps | 99% |
| Rottweil R 903 | <<locked>> | 82% | 44,164 psi | 86% | 2513 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 45,121 psi | 88% | 2592 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 84% | 44,106 psi | 86% | 2490 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 45,600 psi | 89% | 2520 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 88% | 46,499 psi | 90% | 2556 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 45,382 psi | 88% | 2566 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 46,050 psi | 89% | 2428 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 45,107 psi | 88% | 2474 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 44,686 psi | 87% | 2589 fps | 96% |
| Somchem S355 | <<locked>> | 82% | 44,628 psi | 87% | 2510 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 43,366 psi | 84% | 2579 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 45,832 psi | 89% | 2575 fps | 97.1% |
| Vihtavuori N150 | <<locked>> | 84% | 45,324 psi | 88% | 2490 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 43,816 psi | 85% | 2523 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 98% | 44,991 psi | 87% | 2549 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 88% | 45,876 psi | 89% | 2575 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 96% | 45,774 psi | 89% | 2631 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 45,890 psi | 89% | 2543 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 44,846 psi | 87% | 2579 fps | 97.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,771 psi | 81% | 2697 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>> | 90% | 35,389 psi | 69% | 2379 fps | 95.9% |
| Accurate 4350 | <<locked>> | 80% | 34,534 psi | 67% | 2372 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 80% | 43,656 psi | 85% | 2480 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,040 psi | 66% | 2379 fps | 97.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,247 psi | 74% | 2497 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 43,352 psi | 84% | 2556 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 43,149 psi | 84% | 2598 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,484 psi | 51% | 2201 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 94% | 33,866 psi | 66% | 2415 fps | 95.7% |
| Alliant Reloder-26 | 43.1 gr | 86% | 32,198 psi | 63% | 2418 fps | 96% |
| Bofors RP15 | <<locked>> | 98% | 42,554 psi | 83% | 2585 fps | 95.1% |
| Bofors RP5 | <<locked>> | 96% | 43,149 psi | 84% | 2598 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 39,001 psi | 76% | 2388 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 36,651 psi | 71% | 2415 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 82% | 42,177 psi | 82% | 2487 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,633 psi | 61% | 2287 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 82% | 38,159 psi | 74% | 2477 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,137 psi | 53% | 1467 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 39,334 psi | 76% | 2418 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,582 psi | 79% | 2421 fps | 96.2% |
| IMR 4831 | <<locked>> | 80% | 33,475 psi | 65% | 2333 fps | 97.1% |
| Lovex S065 | <<locked>> | 80% | 38,000 psi | 74% | 2375 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 36,216 psi | 70% | 2352 fps | 95.2% |
| Lovex S071 | <<locked>> | 94% | 33,881 psi | 66% | 2346 fps | 95.3% |
| Norma MRP | 43.8 gr | 90% | 37,217 psi | 72% | 2503 fps | 95% |
| Norma URP | <<locked>> | 80% | 34,606 psi | 67% | 2369 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 82% | 35,839 psi | 70% | 2408 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,470 psi | 53% | 1499 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,669 psi | 79% | 2552 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,229 psi | 66% | 2388 fps | 96.9% |
| ReloadSwiss RS 70 | 39.7 gr | 80% | 33,504 psi | 65% | 2385 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 41,437 psi | 80% | 2464 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 92% | 42,337 psi | 82% | 2539 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 39,001 psi | 76% | 2388 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,000 psi | 74% | 2375 fps | 97% |
| Shooters World SW4350 | <<locked>> | 80% | 36,216 psi | 70% | 2352 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,351 psi | 82% | 2510 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,221 psi | 84% | 2385 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,202 psi | 72% | 2323 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 41,930 psi | 81% | 2536 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 41,945 psi | 81% | 2464 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 31,096 psi | 60% | 2329 fps | 99.1% |
| Somchem S385 | <<locked>> | 90% | 40,161 psi | 78% | 2470 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 39,972 psi | 78% | 2398 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 35,926 psi | 70% | 2369 fps | 97.6% |
| Vihtavuori N165 | <<locked>> | 96% | 42,250 psi | 82% | 2500 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 35,389 psi | 69% | 2369 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 82% | 28,863 psi | 56% | 2274 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,128 psi | 68% | 2343 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 36,651 psi | 71% | 2415 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 24,831 psi | 48% | 2218 fps | 95% |
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 51 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 140gr | Speer Impact. Alliant Reloder-26 delivers the highest muzzle velocity at 2,717 fps; across all powders the maximum-charge window runs from 1,640 fps to 2,717 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 51 of the 51 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 140.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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, ReloadSwiss RS 70 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 140gr | Speer Impact 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.