Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 128gr | Hasler Hunting bullet and 48 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 ReloadSwiss RS 62.
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 2700 | <<locked>> | 82% | 46,499 psi | 90% | 2598 fps | 95.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,266 psi | 88% | 2674 fps | 97.5% |
| Accurate 4064 | <<locked>> | 82% | 45,165 psi | 88% | 2612 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 44,483 psi | 86% | 2680 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 84% | 46,383 psi | 90% | 2638 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 46,427 psi | 90% | 2661 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 92% | 46,079 psi | 89% | 2740 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 88% | 46,485 psi | 90% | 2766 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,554 psi | 83% | 2694 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 44,672 psi | 87% | 2802 fps | 98.8% |
| Bofors RP3 | <<locked>> | 84% | 46,369 psi | 90% | 2667 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 82% | 44,179 psi | 86% | 2621 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 88% | 43,888 psi | 85% | 2671 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 45,658 psi | 89% | 2674 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,897 psi | 70% | 1709 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 45,890 psi | 89% | 2618 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 45,701 psi | 89% | 2621 fps | 96.5% |
| IMR 4831 | <<locked>> | 92% | 45,542 psi | 88% | 2680 fps | 99% |
| Lovex S062 | <<locked>> | 82% | 45,658 psi | 89% | 2615 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 45,368 psi | 88% | 2621 fps | 97.8% |
| Lovex S070 | <<locked>> | 90% | 45,818 psi | 89% | 2648 fps | 96.9% |
| Norma 203B | <<locked>> | 82% | 46,006 psi | 89% | 2661 fps | 99.6% |
| Norma MRP | <<locked>> | 98% | 44,672 psi | 87% | 2762 fps | 96.2% |
| Norma URP | <<locked>> | 90% | 44,019 psi | 85% | 2671 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 82% | 46,035 psi | 89% | 2680 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 92% | 45,788 psi | 89% | 2713 fps | 97.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,434 psi | 71% | 1749 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 44,411 psi | 86% | 2605 fps | 96.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 46,180 psi | 90% | 2766 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 44,164 psi | 86% | 2697 fps | 98.5% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 46,543 psi | 90% | 2772 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 84% | 43,700 psi | 85% | 2615 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 45,368 psi | 88% | 2621 fps | 97.8% |
| Shooters World Precision | <<locked>> | 82% | 45,658 psi | 89% | 2615 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 45,818 psi | 89% | 2648 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 44,904 psi | 87% | 2667 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 45,788 psi | 89% | 2536 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 44,991 psi | 87% | 2569 fps | 96.4% |
| Somchem S355 | <<locked>> | 84% | 44,353 psi | 86% | 2618 fps | 99.7% |
| Somchem S365 | <<locked>> | 94% | 45,281 psi | 88% | 2730 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 45,020 psi | 87% | 2595 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 46,079 psi | 89% | 2671 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 46,311 psi | 90% | 2608 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 45,281 psi | 88% | 2671 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 98% | 44,280 psi | 86% | 2717 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 45,788 psi | 89% | 2648 fps | 99.9% |
| Winchester 760 | <<locked>> | 88% | 44,179 psi | 86% | 2674 fps | 96.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,377 psi | 75% | 2720 fps | 99.8% |
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 2700 | <<locked>> | 80% | 43,787 psi | 85% | 2549 fps | 95.2% |
| Accurate 3100 | <<locked>> | 94% | 36,840 psi | 72% | 2510 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 42,424 psi | 82% | 2566 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,415 psi | 61% | 2395 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 41,031 psi | 80% | 2536 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,727 psi | 79% | 2556 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,749 psi | 62% | 2411 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,462 psi | 69% | 2536 fps | 98.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,472 psi | 57% | 2382 fps | 95.9% |
| Alliant Reloder-26 | 45 gr | 90% | 33,721 psi | 65% | 2549 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 40,843 psi | 79% | 2566 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 80% | 41,510 psi | 81% | 2569 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 41,234 psi | 80% | 2615 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,095 psi | 57% | 2313 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,876 psi | 52% | 1529 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,120 psi | 84% | 2569 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,786 psi | 83% | 2566 fps | 95.7% |
| IMR 4831 | <<locked>> | 82% | 32,663 psi | 63% | 2411 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 42,902 psi | 83% | 2566 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 37,565 psi | 73% | 2464 fps | 95.7% |
| Lovex S070 | <<locked>> | 86% | 40,567 psi | 79% | 2546 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 42,960 psi | 83% | 2605 fps | 99.3% |
| Norma MRP | <<locked>> | 96% | 41,655 psi | 81% | 2700 fps | 95.3% |
| Norma URP | <<locked>> | 82% | 34,084 psi | 66% | 2457 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 42,975 psi | 83% | 2625 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 37,608 psi | 73% | 2546 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,166 psi | 53% | 1562 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,510 psi | 81% | 2549 fps | 96.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,724 psi | 73% | 2602 fps | 100% |
| ReloadSwiss RS 62 | 40 gr | 82% | 33,431 psi | 65% | 2467 fps | 95.4% |
| ReloadSwiss RS 70 | 41.7 gr | 84% | 35,694 psi | 69% | 2533 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 38,203 psi | 74% | 2507 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,565 psi | 73% | 2464 fps | 95.7% |
| Shooters World Precision | <<locked>> | 80% | 42,902 psi | 83% | 2566 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 40,567 psi | 79% | 2546 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,349 psi | 76% | 2559 fps | 98.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,335 psi | 78% | 2448 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,989 psi | 82% | 2513 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 38,885 psi | 76% | 2510 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 28,456 psi | 55% | 2352 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 80% | 36,985 psi | 72% | 2448 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 33,011 psi | 64% | 2402 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 43,555 psi | 85% | 2562 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,779 psi | 64% | 2408 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 86% | 29,950 psi | 58% | 2402 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,808 psi | 64% | 2382 fps | 97.7% |
| Winchester 760 | <<locked>> | 86% | 41,234 psi | 80% | 2615 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,775 psi | 54% | 2398 fps | 95.3% |
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 48 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 128gr | Hasler Hunting. Alliant Reloder-26 delivers the highest muzzle velocity at 2,802 fps; across all powders the maximum-charge window runs from 1,709 fps to 2,802 fps. Accurate 3100 gives the best case fill at 100 %, and 48 of the 48 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 128.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, 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, ReloadSwiss RS 70, ReloadSwiss RS 62 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 128gr | Hasler Hunting 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.