Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 144gr | Berger Long Range Hybrid Target bullet and 54 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.
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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 43,613 psi | 85% | 2503 fps | 98.3% |
| Accurate 4350 | <<locked>> | 88% | 45,701 psi | 89% | 2552 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,266 psi | 86% | 2536 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 44,280 psi | 86% | 2559 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 84% | 44,367 psi | 86% | 2575 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,528 psi | 90% | 2579 fps | 96.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 46,557 psi | 90% | 2625 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 44,193 psi | 86% | 2579 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,089 psi | 80% | 2549 fps | 98.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 46,180 psi | 90% | 2687 fps | 99.7% |
| Bofors RP15ᴾ | <<locked>> | 100% | 45,832 psi | 89% | 2612 fps | 96.4% |
| Bofors RP5 | <<locked>> | 98% | 46,557 psi | 90% | 2625 fps | 96.8% |
| Bofors RP7 | <<locked>> | 84% | 44,570 psi | 87% | 2461 fps | 97% |
| Hodgdon H414 | <<locked>> | 86% | 45,165 psi | 88% | 2549 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 84% | 45,353 psi | 88% | 2510 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 44,106 psi | 86% | 2497 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 44,251 psi | 86% | 2566 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,289 psi | 70% | 1614 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 45,005 psi | 87% | 2493 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 45,963 psi | 89% | 2487 fps | 97.8% |
| IMR 4831 | <<locked>> | 88% | 43,816 psi | 85% | 2503 fps | 99.5% |
| Lovex S065 | <<locked>> | 86% | 46,137 psi | 90% | 2490 fps | 98.9% |
| Lovex S070 | <<locked>> | 86% | 44,034 psi | 86% | 2477 fps | 97.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,756 psi | 81% | 2470 fps | 97.9% |
| Norma 204 | <<locked>> | 88% | 45,020 psi | 87% | 2530 fps | 95.9% |
| Norma MRP | <<locked>> | 96% | 45,832 psi | 89% | 2644 fps | 97.9% |
| Norma URP | <<locked>> | 88% | 45,310 psi | 88% | 2546 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 88% | 44,135 psi | 86% | 2539 fps | 98.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 43,337 psi | 84% | 2549 fps | 96.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,927 psi | 72% | 1650 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 43,918 psi | 85% | 2572 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 45,600 psi | 89% | 2575 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 44,469 psi | 86% | 2589 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 82% | 44,643 psi | 87% | 2480 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 45,600 psi | 89% | 2566 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 84% | 44,570 psi | 87% | 2461 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 86% | 46,137 psi | 90% | 2490 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 86% | 44,034 psi | 86% | 2477 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 45,672 psi | 89% | 2530 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 46,108 psi | 90% | 2392 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 45,368 psi | 88% | 2441 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,194 psi | 88% | 2559 fps | 96.4% |
| Somchem S355 | <<locked>> | 82% | 45,092 psi | 88% | 2480 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 43,787 psi | 85% | 2549 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 46,325 psi | 90% | 2549 fps | 97.5% |
| Vihtavuori N150 | <<locked>> | 84% | 45,876 psi | 89% | 2461 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 44,077 psi | 86% | 2490 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 98% | 45,237 psi | 88% | 2520 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 88% | 46,311 psi | 90% | 2543 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 96% | 46,369 psi | 90% | 2602 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 46,354 psi | 90% | 2513 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 45,165 psi | 88% | 2549 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,438 psi | 82% | 2674 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 45,759 psi | 89% | 2533 fps | 96.2% |
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% | 33,243 psi | 65% | 2297 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 34,954 psi | 68% | 2346 fps | 97.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 41,611 psi | 81% | 2484 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,389 psi | 67% | 2352 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,754 psi | 75% | 2474 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 41,133 psi | 80% | 2477 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 94% | 41,002 psi | 80% | 2520 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,193 psi | 49% | 2129 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,198 psi | 63% | 2336 fps | 95.2% |
| Alliant Reloder-26 | 41.5 gr | 84% | 30,371 psi | 59% | 2333 fps | 95.4% |
| Bofors RP15 | <<locked>> | 98% | 43,047 psi | 84% | 2559 fps | 95.6% |
| Bofors RP5 | <<locked>> | 94% | 41,002 psi | 80% | 2520 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 39,363 psi | 76% | 2362 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 36,825 psi | 72% | 2385 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 80% | 40,059 psi | 78% | 2408 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,981 psi | 62% | 2260 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 82% | 38,493 psi | 75% | 2451 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,093 psi | 53% | 1440 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 37,420 psi | 73% | 2346 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,654 psi | 79% | 2388 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 33,620 psi | 65% | 2300 fps | 97.4% |
| Lovex S065 | <<locked>> | 80% | 38,363 psi | 75% | 2346 fps | 97.3% |
| Lovex S070 | <<locked>> | 80% | 36,579 psi | 71% | 2326 fps | 95.6% |
| Lovex S071 | <<locked>> | 92% | 32,300 psi | 63% | 2277 fps | 95% |
| Norma 204 | <<locked>> | 86% | 41,916 psi | 81% | 2470 fps | 95% |
| Norma MRP | 43.2 gr | 90% | 37,666 psi | 73% | 2480 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 34,983 psi | 68% | 2343 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 80% | 33,895 psi | 66% | 2329 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 98% | 40,263 psi | 78% | 2487 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,470 psi | 53% | 1473 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,205 psi | 80% | 2523 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,461 psi | 67% | 2359 fps | 97.2% |
| ReloadSwiss RS 70 | 39.2 gr | 80% | 33,939 psi | 66% | 2362 fps | 96.5% |
| Rottweil R 903 | <<locked>> | 80% | 41,872 psi | 81% | 2431 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 92% | 42,757 psi | 83% | 2513 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 39,363 psi | 76% | 2362 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,363 psi | 75% | 2346 fps | 97.3% |
| Shooters World SW4350 | <<locked>> | 80% | 36,579 psi | 71% | 2326 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,902 psi | 83% | 2484 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,555 psi | 85% | 2352 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,594 psi | 73% | 2297 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,351 psi | 82% | 2507 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 42,366 psi | 82% | 2434 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 31,473 psi | 61% | 2303 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 38,072 psi | 74% | 2392 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 40,393 psi | 78% | 2369 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,361 psi | 71% | 2343 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 94% | 39,827 psi | 77% | 2418 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 35,824 psi | 70% | 2346 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 27,398 psi | 53% | 2201 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,592 psi | 69% | 2320 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 37,101 psi | 72% | 2388 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,179 psi | 49% | 2205 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 94% | 42,859 psi | 83% | 2480 fps | 95.4% |
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 54 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 144gr | Berger Long Range Hybrid Target. Alliant Reloder-26 delivers the highest muzzle velocity at 2,687 fps; across all powders the maximum-charge window runs from 1,614 fps to 2,687 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 54 of the 54 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 144.0 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 | 144gr | Berger Long Range 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.