Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 140gr | Lapua Naturalis bullet and 51 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 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% | 45,948 psi | 89% | 2569 fps | 98.6% |
| Accurate 4350 | <<locked>> | 86% | 45,005 psi | 87% | 2569 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 45,847 psi | 89% | 2595 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 88% | 45,963 psi | 89% | 2621 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 84% | 46,093 psi | 90% | 2641 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 45,542 psi | 88% | 2592 fps | 96.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 45,513 psi | 88% | 2638 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 46,137 psi | 90% | 2641 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,062 psi | 84% | 2618 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 45,179 psi | 88% | 2700 fps | 99.6% |
| Bofors RP15 | <<locked>> | 98% | 44,889 psi | 87% | 2621 fps | 95.9% |
| Bofors RP5 | <<locked>> | 96% | 45,513 psi | 88% | 2638 fps | 96.2% |
| Bofors RP7 | <<locked>> | 84% | 46,427 psi | 90% | 2523 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 84% | 43,888 psi | 85% | 2556 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 82% | 44,295 psi | 86% | 2520 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 45,919 psi | 89% | 2559 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 45,992 psi | 89% | 2628 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,390 psi | 71% | 1644 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 46,586 psi | 90% | 2549 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 44,846 psi | 87% | 2500 fps | 97.4% |
| IMR 4831 | <<locked>> | 88% | 45,730 psi | 89% | 2566 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 45,049 psi | 87% | 2503 fps | 98.6% |
| Lovex S070 | <<locked>> | 86% | 45,948 psi | 89% | 2539 fps | 97.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,106 psi | 86% | 2539 fps | 98.2% |
| Norma 204 | <<locked>> | 88% | 46,543 psi | 90% | 2585 fps | 96.1% |
| Norma MRP | <<locked>> | 94% | 44,875 psi | 87% | 2657 fps | 97.5% |
| Norma URP | <<locked>> | 86% | 44,324 psi | 86% | 2556 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 88% | 45,759 psi | 89% | 2598 fps | 98.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,237 psi | 88% | 2612 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,086 psi | 72% | 1683 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 45,658 psi | 89% | 2635 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 44,643 psi | 87% | 2589 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 46,267 psi | 90% | 2654 fps | 99.4% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,858 psi | 81% | 2628 fps | 96.6% |
| Rottweil R 903 | <<locked>> | 82% | 46,572 psi | 90% | 2543 fps | 100% |
| Rottweil R 905 | <<locked>> | 92% | 44,411 psi | 86% | 2572 fps | 96% |
| Rottweil R 907 | <<locked>> | 84% | 46,427 psi | 90% | 2523 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 45,049 psi | 87% | 2503 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 86% | 45,948 psi | 89% | 2539 fps | 97.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 44,469 psi | 86% | 2454 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 43,990 psi | 85% | 2566 fps | 95.8% |
| Somchem S365 | <<locked>> | 90% | 46,021 psi | 89% | 2615 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 45,237 psi | 88% | 2559 fps | 97% |
| Vihtavuori N150 | <<locked>> | 82% | 44,686 psi | 87% | 2470 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 45,861 psi | 89% | 2552 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 96% | 44,295 psi | 86% | 2530 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 86% | 45,324 psi | 88% | 2556 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 94% | 45,498 psi | 88% | 2618 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 45,063 psi | 88% | 2523 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 44,179 psi | 86% | 2562 fps | 97.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,237 psi | 86% | 2740 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>> | 86% | 33,344 psi | 65% | 2320 fps | 95.1% |
| Accurate 4350 | <<locked>> | 80% | 37,028 psi | 72% | 2415 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 90% | 43,163 psi | 84% | 2543 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,897 psi | 70% | 2415 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,524 psi | 79% | 2536 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,685 psi | 83% | 2536 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,888 psi | 83% | 2585 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,803 psi | 52% | 2201 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,779 psi | 66% | 2405 fps | 95.7% |
| Alliant Reloder-26 | 42.5 gr | 84% | 32,401 psi | 63% | 2411 fps | 96.1% |
| Bofors RP15 | <<locked>> | 96% | 42,018 psi | 82% | 2569 fps | 95% |
| Bofors RP5 | <<locked>> | 94% | 42,888 psi | 83% | 2585 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 41,031 psi | 80% | 2421 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 80% | 38,667 psi | 75% | 2451 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 80% | 41,481 psi | 81% | 2467 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,620 psi | 65% | 2323 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 82% | 40,089 psi | 78% | 2513 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,456 psi | 53% | 1470 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 38,827 psi | 75% | 2402 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,293 psi | 82% | 2451 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 35,694 psi | 69% | 2372 fps | 97.8% |
| Lovex S065 | <<locked>> | 80% | 40,089 psi | 78% | 2408 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 38,334 psi | 74% | 2392 fps | 96% |
| Lovex S071 | <<locked>> | 92% | 34,490 psi | 67% | 2346 fps | 95.6% |
| Norma 204 | <<locked>> | 86% | 43,787 psi | 85% | 2536 fps | 95.3% |
| Norma MRP | 43.2 gr | 88% | 37,028 psi | 72% | 2490 fps | 95% |
| Norma URP | <<locked>> | 80% | 36,651 psi | 71% | 2405 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 80% | 35,433 psi | 69% | 2388 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 98% | 42,192 psi | 82% | 2556 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,862 psi | 54% | 1503 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,004 psi | 84% | 2589 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,463 psi | 71% | 2428 fps | 97.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,607 psi | 69% | 2428 fps | 96.9% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,189 psi | 76% | 2566 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 43,859 psi | 85% | 2497 fps | 100% |
| Rottweil R 905 | <<locked>> | 90% | 41,785 psi | 81% | 2523 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 41,031 psi | 80% | 2421 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,089 psi | 78% | 2408 fps | 97.6% |
| Shooters World SW4350 | <<locked>> | 80% | 38,334 psi | 74% | 2392 fps | 96% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,262 psi | 76% | 2356 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,379 psi | 80% | 2516 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 33,243 psi | 65% | 2369 fps | 99.6% |
| Somchem S385 | <<locked>> | 88% | 39,958 psi | 78% | 2457 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 42,105 psi | 82% | 2428 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,971 psi | 74% | 2402 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 94% | 41,684 psi | 81% | 2484 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 37,492 psi | 73% | 2405 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 29,356 psi | 57% | 2274 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,159 psi | 72% | 2375 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 38,667 psi | 75% | 2451 fps | 95.9% |
| Winchester StaBALL HD | 39.8 gr | 82% | 25,309 psi | 49% | 2224 fps | 95.5% |
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 51 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 140gr | Lapua Naturalis. Winchester StaBALL HD delivers the highest muzzle velocity at 2,740 fps; across all powders the maximum-charge window runs from 1,644 fps to 2,740 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 51 of the 51 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 140.0 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. Norma MRP, Alliant Reloder-26, Winchester StaBALL HD rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 140gr | Lapua Naturalis 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.