Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 140gr | Hornady InterLock 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 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% | 44,701 psi | 87% | 2566 fps | 98.5% |
| Accurate 4350 | <<locked>> | 86% | 43,729 psi | 85% | 2562 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 45,223 psi | 88% | 2598 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 88% | 45,194 psi | 88% | 2621 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 84% | 45,484 psi | 88% | 2641 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,614 psi | 87% | 2589 fps | 96% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,657 psi | 87% | 2635 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 45,310 psi | 88% | 2644 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,119 psi | 82% | 2615 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 94% | 44,440 psi | 86% | 2700 fps | 99.5% |
| Bofors RP5 | <<locked>> | 96% | 44,657 psi | 87% | 2635 fps | 96.2% |
| Bofors RP7 | <<locked>> | 84% | 45,237 psi | 88% | 2520 fps | 97.2% |
| Hodgdon H414 | <<locked>> | 86% | 45,992 psi | 89% | 2608 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 84% | 46,253 psi | 90% | 2572 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 45,339 psi | 88% | 2562 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 45,252 psi | 88% | 2631 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,434 psi | 71% | 1654 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 46,079 psi | 89% | 2556 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 44,237 psi | 86% | 2503 fps | 97.4% |
| IMR 4831 | <<locked>> | 88% | 44,672 psi | 87% | 2566 fps | 99.5% |
| Lovex S065 | <<locked>> | 84% | 44,092 psi | 86% | 2503 fps | 98.5% |
| Lovex S070 | <<locked>> | 86% | 44,918 psi | 87% | 2536 fps | 97.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,859 psi | 83% | 2533 fps | 98.1% |
| Norma 204 | <<locked>> | 88% | 45,919 psi | 89% | 2592 fps | 96.1% |
| Norma MRP | <<locked>> | 94% | 43,932 psi | 85% | 2654 fps | 97.4% |
| Norma URP | <<locked>> | 88% | 46,166 psi | 90% | 2605 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 88% | 45,107 psi | 88% | 2602 fps | 98.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,454 psi | 86% | 2615 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,043 psi | 72% | 1693 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 44,860 psi | 87% | 2635 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 43,526 psi | 85% | 2582 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 45,556 psi | 88% | 2657 fps | 99.4% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,930 psi | 79% | 2625 fps | 96.5% |
| Rottweil R 903 | <<locked>> | 82% | 45,513 psi | 88% | 2539 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 46,514 psi | 90% | 2625 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 84% | 45,237 psi | 88% | 2520 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 84% | 44,092 psi | 86% | 2503 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 86% | 44,918 psi | 87% | 2536 fps | 97.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 46,137 psi | 90% | 2500 fps | 97.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 46,079 psi | 89% | 2621 fps | 96.5% |
| Somchem S355 | <<locked>> | 82% | 45,934 psi | 89% | 2539 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 45,005 psi | 87% | 2612 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 44,324 psi | 86% | 2556 fps | 97% |
| Vihtavuori N150 | <<locked>> | 84% | 46,572 psi | 90% | 2516 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 44,947 psi | 87% | 2549 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 98% | 46,470 psi | 90% | 2585 fps | 97.1% |
| Vihtavuori N550 | <<locked>> | 86% | 44,309 psi | 86% | 2552 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 94% | 44,454 psi | 86% | 2615 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 44,396 psi | 86% | 2526 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 46,311 psi | 90% | 2615 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,395 psi | 84% | 2740 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% | 34,214 psi | 66% | 2359 fps | 95.6% |
| Accurate 4350 | <<locked>> | 80% | 35,795 psi | 70% | 2405 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 90% | 42,279 psi | 82% | 2539 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,157 psi | 68% | 2415 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,421 psi | 77% | 2530 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,018 psi | 82% | 2539 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,003 psi | 82% | 2585 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,614 psi | 50% | 2178 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,851 psi | 64% | 2395 fps | 95.4% |
| Alliant Reloder-26 | 43.3 gr | 84% | 31,125 psi | 60% | 2395 fps | 95.6% |
| Bofors RP5 | <<locked>> | 94% | 42,003 psi | 82% | 2585 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 40,161 psi | 78% | 2421 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 37,811 psi | 73% | 2448 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 80% | 40,756 psi | 79% | 2467 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,547 psi | 63% | 2313 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 82% | 39,334 psi | 76% | 2510 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,064 psi | 53% | 1473 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 38,072 psi | 74% | 2402 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,423 psi | 80% | 2448 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 34,418 psi | 67% | 2359 fps | 97.5% |
| Lovex S065 | <<locked>> | 80% | 38,899 psi | 76% | 2402 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 37,101 psi | 72% | 2382 fps | 95.7% |
| Lovex S071 | <<locked>> | 92% | 33,054 psi | 64% | 2333 fps | 95.1% |
| Norma 204 | <<locked>> | 86% | 42,902 psi | 83% | 2536 fps | 95.2% |
| Norma MRP | 45 gr | 90% | 38,406 psi | 75% | 2539 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 35,534 psi | 69% | 2398 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 80% | 34,490 psi | 67% | 2382 fps | 95.5% |
| Ramshot Magnum | <<locked>> | 98% | 41,379 psi | 80% | 2556 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,673 psi | 54% | 1512 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,887 psi | 81% | 2582 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,375 psi | 69% | 2418 fps | 97.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 34,650 psi | 67% | 2425 fps | 96.7% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,276 psi | 74% | 2562 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 42,496 psi | 83% | 2487 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 90% | 40,785 psi | 79% | 2520 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 40,161 psi | 78% | 2421 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,899 psi | 76% | 2402 fps | 97.4% |
| Shooters World SW4350 | <<locked>> | 80% | 37,101 psi | 72% | 2382 fps | 95.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,014 psi | 74% | 2346 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 43,294 psi | 84% | 2569 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 42,960 psi | 83% | 2490 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 32,227 psi | 63% | 2362 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 39,030 psi | 76% | 2454 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 40,959 psi | 80% | 2425 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,130 psi | 72% | 2402 fps | 98% |
| Vihtavuori N165 | <<locked>> | 94% | 40,843 psi | 79% | 2480 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 36,506 psi | 71% | 2402 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 80% | 27,963 psi | 54% | 2251 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,260 psi | 70% | 2372 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 37,811 psi | 73% | 2448 fps | 95.7% |
| Winchester StaBALL HD | 41.6 gr | 84% | 25,715 psi | 50% | 2260 fps | 96.1% |
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 51 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 140gr | Hornady InterLock. Winchester StaBALL HD delivers the highest muzzle velocity at 2,740 fps; across all powders the maximum-charge window runs from 1,654 fps to 2,740 fps. Alliant Reloder-25 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 71–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.264" calls for a 1:10.0 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. Alliant Reloder-26, Norma MRP, Winchester StaBALL HD rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 140gr | Hornady InterLock 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.