Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 140gr | Speer Gold Dot bullet and 53 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.
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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 45,179 psi | 88% | 2575 fps | 98.6% |
| Accurate 4350 | <<locked>> | 86% | 44,222 psi | 86% | 2572 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 45,353 psi | 88% | 2602 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 45,542 psi | 88% | 2605 fps | 96.2% |
| Alliant Reloder-16 | <<locked>> | 88% | 45,353 psi | 88% | 2628 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 84% | 45,716 psi | 89% | 2648 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 45,049 psi | 87% | 2598 fps | 96.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 45,063 psi | 88% | 2644 fps | 96.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 45,455 psi | 88% | 2648 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,496 psi | 83% | 2625 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 44,585 psi | 87% | 2703 fps | 99.6% |
| Bofors RP15 | <<locked>> | 98% | 44,121 psi | 86% | 2628 fps | 95.9% |
| Bofors RP5 | <<locked>> | 96% | 45,063 psi | 88% | 2644 fps | 96.3% |
| Bofors RP7 | <<locked>> | 84% | 45,745 psi | 89% | 2533 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 86% | 46,456 psi | 90% | 2621 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 84% | 46,427 psi | 90% | 2579 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 45,542 psi | 88% | 2569 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 45,672 psi | 89% | 2641 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,187 psi | 70% | 1654 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 46,238 psi | 90% | 2562 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 44,396 psi | 86% | 2510 fps | 97.4% |
| IMR 4831 | <<locked>> | 88% | 45,136 psi | 88% | 2572 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 44,251 psi | 86% | 2507 fps | 98.6% |
| Lovex S070 | <<locked>> | 86% | 45,078 psi | 88% | 2543 fps | 97.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,004 psi | 84% | 2536 fps | 98.2% |
| Norma 204 | <<locked>> | 88% | 46,050 psi | 89% | 2595 fps | 96.2% |
| Norma MRP | <<locked>> | 94% | 44,338 psi | 86% | 2664 fps | 97.6% |
| Norma URP | <<locked>> | 86% | 43,598 psi | 85% | 2562 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 88% | 45,266 psi | 88% | 2608 fps | 98.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,817 psi | 87% | 2625 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,115 psi | 72% | 1696 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 45,368 psi | 88% | 2644 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 44,034 psi | 86% | 2595 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 45,701 psi | 89% | 2661 fps | 99.4% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,292 psi | 80% | 2638 fps | 96.7% |
| Rottweil R 903 | <<locked>> | 82% | 45,730 psi | 89% | 2546 fps | 100% |
| Rottweil R 905 | <<locked>> | 92% | 43,859 psi | 85% | 2579 fps | 96% |
| Rottweil R 907 | <<locked>> | 84% | 45,745 psi | 89% | 2533 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 44,251 psi | 86% | 2507 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 86% | 45,078 psi | 88% | 2543 fps | 97.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 43,598 psi | 85% | 2457 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 46,557 psi | 90% | 2631 fps | 96.7% |
| Somchem S355 | <<locked>> | 82% | 46,122 psi | 90% | 2546 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 45,484 psi | 88% | 2621 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 44,483 psi | 86% | 2562 fps | 97% |
| Vihtavuori N150 | <<locked>> | 82% | 43,990 psi | 85% | 2477 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 45,484 psi | 88% | 2562 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 96% | 43,845 psi | 85% | 2539 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 86% | 44,744 psi | 87% | 2566 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 94% | 44,643 psi | 87% | 2618 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 44,541 psi | 87% | 2533 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 46,456 psi | 90% | 2621 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,787 psi | 85% | 2749 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% | 34,403 psi | 67% | 2362 fps | 95.7% |
| Accurate 4350 | <<locked>> | 80% | 36,027 psi | 70% | 2411 fps | 98% |
| ADI AR 2209 | <<locked>> | 90% | 42,699 psi | 83% | 2552 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 42,627 psi | 83% | 2549 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,331 psi | 69% | 2421 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,842 psi | 77% | 2539 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,148 psi | 82% | 2543 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,148 psi | 82% | 2589 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,744 psi | 50% | 2185 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,967 psi | 64% | 2402 fps | 95.5% |
| Alliant Reloder-26 | 43.5 gr | 84% | 31,256 psi | 61% | 2402 fps | 95.8% |
| Bofors RP15 | <<locked>> | 96% | 41,568 psi | 81% | 2575 fps | 95.1% |
| Bofors RP5 | <<locked>> | 94% | 42,148 psi | 82% | 2589 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 40,321 psi | 78% | 2428 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 37,971 psi | 74% | 2454 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 80% | 40,973 psi | 80% | 2474 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,735 psi | 64% | 2320 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 82% | 39,436 psi | 77% | 2516 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,151 psi | 53% | 1476 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 38,247 psi | 74% | 2408 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,582 psi | 81% | 2454 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 34,592 psi | 67% | 2365 fps | 97.6% |
| Lovex S065 | <<locked>> | 80% | 39,073 psi | 76% | 2408 fps | 97.5% |
| Lovex S070 | <<locked>> | 80% | 37,507 psi | 73% | 2392 fps | 95.9% |
| Lovex S071 | <<locked>> | 92% | 33,460 psi | 65% | 2343 fps | 95.3% |
| Norma 204 | <<locked>> | 86% | 43,033 psi | 84% | 2539 fps | 95.3% |
| Norma MRP | 45.3 gr | 90% | 38,798 psi | 75% | 2549 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 35,984 psi | 70% | 2408 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 80% | 34,679 psi | 67% | 2392 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 98% | 41,771 psi | 81% | 2566 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,499 psi | 53% | 1509 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,380 psi | 82% | 2592 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,578 psi | 69% | 2425 fps | 97.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 34,809 psi | 68% | 2431 fps | 96.8% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,609 psi | 75% | 2572 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 43,018 psi | 84% | 2500 fps | 100% |
| Rottweil R 905 | <<locked>> | 90% | 41,205 psi | 80% | 2530 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 40,321 psi | 78% | 2428 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,073 psi | 76% | 2408 fps | 97.5% |
| Shooters World SW4350 | <<locked>> | 80% | 37,507 psi | 73% | 2392 fps | 95.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,435 psi | 75% | 2359 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,799 psi | 79% | 2523 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 43,178 psi | 84% | 2493 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 32,430 psi | 63% | 2365 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 39,204 psi | 76% | 2461 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 41,394 psi | 80% | 2434 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,318 psi | 72% | 2408 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 94% | 40,973 psi | 80% | 2487 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 36,695 psi | 71% | 2408 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 28,137 psi | 55% | 2257 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,390 psi | 71% | 2379 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 37,971 psi | 74% | 2454 fps | 95.9% |
| Winchester StaBALL HD | 41.8 gr | 84% | 25,802 psi | 50% | 2267 fps | 96.2% |
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 53 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 140gr | Speer Gold Dot. Winchester StaBALL HD delivers the highest muzzle velocity at 2,749 fps; across all powders the maximum-charge window runs from 1,654 fps to 2,749 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 53 of the 53 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 1:10.0 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 | Speer Gold Dot 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.