Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 144gr | Lapua MaxRange Target OTM 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 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% | 44,788 psi | 87% | 2530 fps | 98.6% |
| Accurate 4350 | <<locked>> | 86% | 43,801 psi | 85% | 2523 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 45,179 psi | 88% | 2559 fps | 96.2% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 45,078 psi | 88% | 2556 fps | 96.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 45,237 psi | 88% | 2585 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 84% | 45,353 psi | 88% | 2598 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,585 psi | 87% | 2549 fps | 96.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,773 psi | 87% | 2598 fps | 96.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 45,078 psi | 88% | 2598 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,018 psi | 82% | 2575 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 44,382 psi | 86% | 2661 fps | 99.6% |
| Bofors RP15 | <<locked>> | 98% | 43,830 psi | 85% | 2579 fps | 96% |
| Bofors RP5 | <<locked>> | 96% | 44,773 psi | 87% | 2598 fps | 96.4% |
| Bofors RP7 | <<locked>> | 84% | 45,223 psi | 88% | 2480 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 86% | 46,137 psi | 90% | 2572 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 84% | 46,296 psi | 90% | 2533 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 45,150 psi | 88% | 2520 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 45,295 psi | 88% | 2592 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,347 psi | 71% | 1621 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 45,905 psi | 89% | 2513 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 44,164 psi | 86% | 2464 fps | 97.5% |
| IMR 4831 | <<locked>> | 88% | 44,759 psi | 87% | 2526 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 44,063 psi | 86% | 2461 fps | 98.7% |
| Lovex S070 | <<locked>> | 86% | 44,976 psi | 87% | 2497 fps | 98% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,598 psi | 83% | 2490 fps | 98.2% |
| Norma 204 | <<locked>> | 88% | 45,847 psi | 89% | 2552 fps | 96.3% |
| Norma MRP | <<locked>> | 94% | 44,077 psi | 86% | 2618 fps | 97.7% |
| Norma URP | <<locked>> | 88% | 46,282 psi | 90% | 2566 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 88% | 45,020 psi | 87% | 2559 fps | 98.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,527 psi | 86% | 2579 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,985 psi | 72% | 1660 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 44,933 psi | 87% | 2592 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 46,572 psi | 90% | 2595 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 45,295 psi | 88% | 2612 fps | 99.5% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,756 psi | 79% | 2585 fps | 96.7% |
| Rottweil R 903 | <<locked>> | 82% | 45,455 psi | 88% | 2500 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 46,514 psi | 90% | 2585 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 84% | 45,223 psi | 88% | 2480 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 44,063 psi | 86% | 2461 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 86% | 44,976 psi | 87% | 2497 fps | 98% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 46,296 psi | 90% | 2464 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 46,093 psi | 90% | 2582 fps | 96.8% |
| Somchem S355 | <<locked>> | 82% | 45,847 psi | 89% | 2500 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 45,194 psi | 88% | 2575 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 44,338 psi | 86% | 2520 fps | 97.1% |
| Vihtavuori N150 | <<locked>> | 84% | 46,572 psi | 90% | 2477 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 45,078 psi | 88% | 2513 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 98% | 46,340 psi | 90% | 2543 fps | 97.2% |
| Vihtavuori N550 | <<locked>> | 86% | 44,411 psi | 86% | 2516 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 94% | 44,425 psi | 86% | 2575 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 44,396 psi | 86% | 2487 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 46,137 psi | 90% | 2572 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,381 psi | 84% | 2700 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,932 psi | 85% | 2507 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% | 34,113 psi | 66% | 2323 fps | 95.8% |
| Accurate 4350 | <<locked>> | 80% | 35,737 psi | 69% | 2365 fps | 98% |
| ADI AR 2209 | <<locked>> | 90% | 42,482 psi | 83% | 2507 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 42,438 psi | 82% | 2507 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,027 psi | 68% | 2375 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,407 psi | 77% | 2490 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 41,945 psi | 81% | 2500 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 41,785 psi | 81% | 2543 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,686 psi | 50% | 2152 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,851 psi | 64% | 2362 fps | 95.7% |
| Alliant Reloder-26 | 42.3 gr | 84% | 31,053 psi | 60% | 2359 fps | 95.9% |
| Bofors RP15 | <<locked>> | 96% | 41,220 psi | 80% | 2530 fps | 95.2% |
| Bofors RP5 | <<locked>> | 94% | 41,785 psi | 81% | 2543 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 40,030 psi | 78% | 2382 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 37,782 psi | 73% | 2411 fps | 96% |
| Hodgdon H4350 | <<locked>> | 80% | 40,727 psi | 79% | 2431 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,663 psi | 63% | 2280 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 80% | 36,680 psi | 71% | 2415 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,050 psi | 53% | 1444 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 38,029 psi | 74% | 2365 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,321 psi | 80% | 2408 fps | 96.8% |
| IMR 4831 | <<locked>> | 80% | 34,577 psi | 67% | 2326 fps | 97.8% |
| Lovex S065 | <<locked>> | 80% | 39,044 psi | 76% | 2365 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 37,260 psi | 72% | 2349 fps | 96% |
| Lovex S071 | <<locked>> | 92% | 33,127 psi | 64% | 2300 fps | 95.4% |
| Norma 204 | <<locked>> | 86% | 42,757 psi | 83% | 2493 fps | 95.4% |
| Norma MRP | 43 gr | 88% | 35,882 psi | 70% | 2444 fps | 95% |
| Norma URP | <<locked>> | 80% | 35,679 psi | 69% | 2362 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 80% | 34,490 psi | 67% | 2349 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 96% | 38,566 psi | 75% | 2461 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,688 psi | 54% | 1483 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,901 psi | 81% | 2539 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,404 psi | 69% | 2382 fps | 97.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 34,490 psi | 67% | 2385 fps | 96.9% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,101 psi | 74% | 2523 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 42,685 psi | 83% | 2454 fps | 100% |
| Rottweil R 905 | <<locked>> | 90% | 40,944 psi | 80% | 2484 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 40,030 psi | 78% | 2382 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,044 psi | 76% | 2365 fps | 97.6% |
| Shooters World SW4350 | <<locked>> | 80% | 37,260 psi | 72% | 2349 fps | 96% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,174 psi | 74% | 2313 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,553 psi | 79% | 2477 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 43,120 psi | 84% | 2451 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 32,169 psi | 62% | 2323 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 38,957 psi | 76% | 2415 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 41,104 psi | 80% | 2388 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,043 psi | 72% | 2362 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 94% | 40,857 psi | 79% | 2448 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 36,492 psi | 71% | 2362 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 28,050 psi | 54% | 2221 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,100 psi | 70% | 2333 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 37,782 psi | 73% | 2411 fps | 96% |
| Winchester StaBALL HD | 39.7 gr | 82% | 24,134 psi | 47% | 2169 fps | 95% |
| Winchester Supreme 780 | <<locked>> | 92% | 40,930 psi | 79% | 2451 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 54 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 144gr | Lapua MaxRange Target OTM. Winchester StaBALL HD delivers the highest muzzle velocity at 2,700 fps; across all powders the maximum-charge window runs from 1,621 fps to 2,700 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 71–90 %, leaving at least 10 % headroom. The 144.0 gr projectile in 0.264" calls for a 1:9.0 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 | 144gr | Lapua MaxRange Target OTM 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.