Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 140gr | Berger Hybrid Target 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 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% | 46,441 psi | 90% | 2589 fps | 98.6% |
| Accurate 4350 | <<locked>> | 88% | 45,484 psi | 88% | 2585 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 88% | 43,888 psi | 85% | 2592 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 84% | 44,150 psi | 86% | 2615 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,224 psi | 90% | 2612 fps | 96.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 46,369 psi | 90% | 2661 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 43,859 psi | 85% | 2612 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,973 psi | 80% | 2582 fps | 98.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 45,948 psi | 89% | 2723 fps | 99.6% |
| Bofors RP15ᴾ | <<locked>> | 100% | 45,411 psi | 88% | 2641 fps | 96% |
| Bofors RP5 | <<locked>> | 98% | 46,369 psi | 90% | 2661 fps | 96.5% |
| Bofors RP7 | <<locked>> | 84% | 44,280 psi | 86% | 2493 fps | 96.8% |
| Hodgdon H414 | <<locked>> | 86% | 44,657 psi | 87% | 2579 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 84% | 45,281 psi | 88% | 2546 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 43,932 psi | 85% | 2536 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 43,888 psi | 85% | 2595 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,085 psi | 70% | 1640 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 44,875 psi | 87% | 2526 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 84% | 45,919 psi | 89% | 2526 fps | 97.6% |
| IMR 4831 | <<locked>> | 90% | 46,427 psi | 90% | 2589 fps | 99.6% |
| Lovex S065 | <<locked>> | 86% | 45,745 psi | 89% | 2523 fps | 98.7% |
| Lovex S070 | <<locked>> | 86% | 43,671 psi | 85% | 2507 fps | 97.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,394 psi | 80% | 2500 fps | 97.6% |
| Norma MRP | <<locked>> | 96% | 45,672 psi | 89% | 2680 fps | 97.7% |
| Norma URP | <<locked>> | 88% | 45,136 psi | 88% | 2582 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 88% | 43,569 psi | 85% | 2569 fps | 98.1% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 43,033 psi | 84% | 2579 fps | 96% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,709 psi | 71% | 1677 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 43,801 psi | 85% | 2612 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 45,310 psi | 88% | 2608 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 44,164 psi | 86% | 2625 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 82% | 44,367 psi | 86% | 2516 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 45,281 psi | 88% | 2598 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 84% | 44,280 psi | 86% | 2493 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 45,745 psi | 89% | 2523 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 86% | 43,671 psi | 85% | 2507 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 45,571 psi | 89% | 2569 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 45,876 psi | 89% | 2428 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 45,266 psi | 88% | 2477 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 44,846 psi | 87% | 2592 fps | 96.1% |
| Somchem S355 | <<locked>> | 82% | 44,788 psi | 87% | 2516 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 46,456 psi | 90% | 2631 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 45,948 psi | 89% | 2579 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 84% | 45,484 psi | 88% | 2493 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 43,961 psi | 85% | 2526 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 98% | 45,150 psi | 88% | 2552 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 88% | 46,050 psi | 89% | 2579 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 96% | 45,977 psi | 89% | 2638 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 46,050 psi | 89% | 2549 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 45,020 psi | 87% | 2585 fps | 97.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,872 psi | 81% | 2703 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 45,687 psi | 89% | 2566 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>> | 88% | 33,069 psi | 64% | 2326 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 34,664 psi | 67% | 2375 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,200 psi | 66% | 2385 fps | 97.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,406 psi | 75% | 2503 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 43,497 psi | 84% | 2559 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 43,294 psi | 84% | 2602 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,614 psi | 52% | 2208 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 94% | 33,982 psi | 66% | 2418 fps | 95.7% |
| Alliant Reloder-26 | 43.2 gr | 86% | 32,314 psi | 63% | 2421 fps | 96.1% |
| Bofors RP15 | <<locked>> | 98% | 42,685 psi | 83% | 2589 fps | 95.2% |
| Bofors RP5 | <<locked>> | 96% | 43,294 psi | 84% | 2602 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 39,175 psi | 76% | 2395 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 36,521 psi | 71% | 2415 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 82% | 42,308 psi | 82% | 2490 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,560 psi | 61% | 2283 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 82% | 38,290 psi | 74% | 2480 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,064 psi | 53% | 1467 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 39,465 psi | 77% | 2425 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,451 psi | 79% | 2421 fps | 96.2% |
| IMR 4831 | <<locked>> | 80% | 33,373 psi | 65% | 2329 fps | 97.1% |
| Lovex S065 | <<locked>> | 80% | 38,174 psi | 74% | 2379 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 36,347 psi | 71% | 2359 fps | 95.3% |
| Lovex S071 | <<locked>> | 94% | 34,040 psi | 66% | 2349 fps | 95.4% |
| Norma MRP | 43.9 gr | 90% | 37,376 psi | 73% | 2507 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 34,737 psi | 67% | 2375 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 80% | 33,634 psi | 65% | 2356 fps | 95% |
| Ramshot Magnum | <<locked>> | 98% | 40,016 psi | 78% | 2516 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,412 psi | 53% | 1499 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,814 psi | 79% | 2556 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,360 psi | 67% | 2392 fps | 97% |
| ReloadSwiss RS 70 | 39.8 gr | 80% | 33,634 psi | 65% | 2388 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 41,611 psi | 81% | 2467 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 92% | 42,177 psi | 82% | 2539 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 39,175 psi | 76% | 2395 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,174 psi | 74% | 2379 fps | 97.1% |
| Shooters World SW4350 | <<locked>> | 80% | 36,347 psi | 71% | 2359 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,540 psi | 83% | 2513 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,091 psi | 84% | 2385 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,101 psi | 72% | 2323 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 41,771 psi | 81% | 2533 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 42,105 psi | 82% | 2467 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 31,227 psi | 61% | 2333 fps | 99.2% |
| Somchem S385 | <<locked>> | 90% | 40,335 psi | 78% | 2474 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 40,161 psi | 78% | 2405 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,100 psi | 70% | 2375 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 96% | 42,105 psi | 82% | 2500 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 35,520 psi | 69% | 2375 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 82% | 28,993 psi | 56% | 2277 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,244 psi | 68% | 2346 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 36,796 psi | 71% | 2421 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 84% | 24,918 psi | 48% | 2221 fps | 95.1% |
| Winchester Supreme 780 | <<locked>> | 94% | 42,540 psi | 83% | 2510 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 52 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 140gr | Berger Hybrid Target. Alliant Reloder-26 delivers the highest muzzle velocity at 2,723 fps; across all powders the maximum-charge window runs from 1,640 fps to 2,723 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 140.0 gr projectile in 0.264" calls for a 1:8.5 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, ReloadSwiss RS 70 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 140gr | Berger Hybrid Target 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.