Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 140gr | Speer TBBC 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, ReloadSwiss RS 70 and Norma MRP.
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>> | 98% | 46,238 psi | 90% | 2585 fps | 98.6% |
| Accurate 4350 | <<locked>> | 88% | 45,266 psi | 88% | 2582 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 82% | 46,354 psi | 90% | 2526 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 46,586 psi | 90% | 2612 fps | 96.2% |
| Alliant Reloder-16 | <<locked>> | 88% | 43,990 psi | 85% | 2592 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 84% | 43,961 psi | 85% | 2608 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,050 psi | 89% | 2608 fps | 96.2% |
| Alliant Reloder-22 | <<locked>> | 98% | 46,209 psi | 90% | 2654 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,499 psi | 90% | 2657 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,799 psi | 79% | 2575 fps | 98.2% |
| Alliant Reloder-26 | <<locked>> | 96% | 45,716 psi | 89% | 2717 fps | 99.6% |
| Bofors RP15ᴾ | <<locked>> | 100% | 45,223 psi | 88% | 2635 fps | 95.9% |
| Bofors RP5 | <<locked>> | 98% | 46,209 psi | 90% | 2654 fps | 96.4% |
| Bofors RP7 | <<locked>> | 84% | 44,382 psi | 86% | 2493 fps | 96.8% |
| Hodgdon H414 | <<locked>> | 86% | 44,773 psi | 87% | 2579 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 84% | 45,092 psi | 88% | 2543 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 43,729 psi | 85% | 2530 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 44,019 psi | 85% | 2598 fps | 97% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,143 psi | 70% | 1640 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 44,672 psi | 87% | 2523 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 45,730 psi | 89% | 2520 fps | 97.5% |
| IMR 4831 | <<locked>> | 90% | 46,224 psi | 90% | 2585 fps | 99.6% |
| Lovex S065 | <<locked>> | 86% | 45,556 psi | 88% | 2520 fps | 98.7% |
| Lovex S070 | <<locked>> | 88% | 46,485 psi | 90% | 2556 fps | 98% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,205 psi | 80% | 2493 fps | 97.6% |
| Norma MRP | <<locked>> | 96% | 45,513 psi | 88% | 2674 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 44,889 psi | 87% | 2575 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 90% | 46,456 psi | 90% | 2618 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,767 psi | 71% | 1677 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 43,598 psi | 85% | 2605 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 45,092 psi | 88% | 2605 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 44,005 psi | 85% | 2618 fps | 99% |
| Rottweil R 903 | <<locked>> | 82% | 44,135 psi | 86% | 2510 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 45,092 psi | 88% | 2592 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 84% | 44,382 psi | 86% | 2493 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 45,556 psi | 88% | 2520 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 88% | 46,485 psi | 90% | 2556 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 45,368 psi | 88% | 2562 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 45,977 psi | 89% | 2428 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 45,092 psi | 88% | 2474 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 44,672 psi | 87% | 2585 fps | 96% |
| Somchem S355 | <<locked>> | 82% | 44,585 psi | 87% | 2510 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 46,586 psi | 90% | 2631 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 45,774 psi | 89% | 2575 fps | 97.1% |
| Vihtavuori N150 | <<locked>> | 84% | 45,600 psi | 89% | 2497 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 43,743 psi | 85% | 2520 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 98% | 44,962 psi | 87% | 2549 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 88% | 45,861 psi | 89% | 2572 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 96% | 45,745 psi | 89% | 2631 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 46,180 psi | 90% | 2546 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 44,773 psi | 87% | 2579 fps | 97.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,032 psi | 82% | 2703 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% | 35,375 psi | 69% | 2379 fps | 95.9% |
| Accurate 4350 | <<locked>> | 80% | 34,505 psi | 67% | 2369 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 80% | 43,627 psi | 85% | 2480 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 43,816 psi | 85% | 2562 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,026 psi | 66% | 2379 fps | 97.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,232 psi | 74% | 2497 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 43,279 psi | 84% | 2556 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 43,424 psi | 84% | 2602 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,469 psi | 51% | 2201 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 94% | 33,852 psi | 66% | 2411 fps | 95.6% |
| Alliant Reloder-26 | 43.1 gr | 86% | 32,155 psi | 62% | 2415 fps | 95.9% |
| Bofors RP15 | <<locked>> | 98% | 42,482 psi | 83% | 2582 fps | 95.1% |
| Bofors RP5 | <<locked>> | 96% | 43,424 psi | 84% | 2602 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 38,986 psi | 76% | 2388 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 36,622 psi | 71% | 2415 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 82% | 42,409 psi | 82% | 2490 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,589 psi | 61% | 2283 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 82% | 38,130 psi | 74% | 2477 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 53% | 1467 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 39,552 psi | 77% | 2425 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,538 psi | 79% | 2421 fps | 96.2% |
| IMR 4831 | <<locked>> | 80% | 33,460 psi | 65% | 2329 fps | 97.1% |
| Lovex S065 | <<locked>> | 80% | 37,985 psi | 74% | 2375 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 36,187 psi | 70% | 2352 fps | 95.2% |
| Lovex S071 | <<locked>> | 94% | 34,098 psi | 66% | 2349 fps | 95.4% |
| Norma MRP | 43.8 gr | 90% | 37,202 psi | 72% | 2503 fps | 95% |
| Norma URP | <<locked>> | 80% | 34,548 psi | 67% | 2369 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 82% | 35,824 psi | 70% | 2408 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,456 psi | 53% | 1499 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,625 psi | 79% | 2552 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,185 psi | 66% | 2385 fps | 96.9% |
| ReloadSwiss RS 70 | 39.7 gr | 80% | 33,489 psi | 65% | 2385 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 41,394 psi | 80% | 2461 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 92% | 42,293 psi | 82% | 2539 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 38,986 psi | 76% | 2388 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,985 psi | 74% | 2375 fps | 97% |
| Shooters World SW4350 | <<locked>> | 80% | 36,187 psi | 70% | 2352 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,337 psi | 82% | 2510 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,178 psi | 84% | 2385 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,173 psi | 72% | 2320 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 41,887 psi | 81% | 2533 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 41,901 psi | 81% | 2461 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 31,067 psi | 60% | 2326 fps | 99.1% |
| Somchem S385 | <<locked>> | 90% | 40,132 psi | 78% | 2470 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 39,958 psi | 78% | 2398 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 35,911 psi | 70% | 2369 fps | 97.6% |
| Vihtavuori N165 | <<locked>> | 96% | 42,235 psi | 82% | 2500 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 35,346 psi | 69% | 2369 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 82% | 28,834 psi | 56% | 2270 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,331 psi | 69% | 2346 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 36,622 psi | 71% | 2415 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 84% | 24,990 psi | 49% | 2224 fps | 95.1% |
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 52 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 140gr | Speer TBBC. 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 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 1:9.0 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, ReloadSwiss RS 70, Norma MRP rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 140gr | Speer TBBC 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.