Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 123gr | Lapua Scenar bullet and 49 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 Alliant Reloder-16.
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 3100ᴾ | <<locked>> | 100% | 43,627 psi | 85% | 2694 fps | 96.7% |
| Accurate 4064 | <<locked>> | 82% | 44,324 psi | 86% | 2654 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 46,340 psi | 90% | 2766 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 84% | 45,397 psi | 88% | 2671 fps | 99% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 46,108 psi | 90% | 2815 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 45,324 psi | 88% | 2694 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 82% | 45,614 psi | 89% | 2707 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 92% | 45,136 psi | 88% | 2776 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 88% | 45,121 psi | 88% | 2795 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,524 psi | 81% | 2723 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 43,642 psi | 85% | 2831 fps | 98.2% |
| Bofors RP3 | <<locked>> | 84% | 45,469 psi | 88% | 2707 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 84% | 46,122 psi | 90% | 2710 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 90% | 45,977 psi | 89% | 2759 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 44,599 psi | 87% | 2710 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,679 psi | 69% | 1742 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 44,875 psi | 87% | 2654 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 44,686 psi | 87% | 2651 fps | 95.7% |
| IMR 4831 | <<locked>> | 92% | 44,164 psi | 86% | 2710 fps | 98.5% |
| Lovex S062 | <<locked>> | 82% | 44,614 psi | 87% | 2651 fps | 99.8% |
| Lovex S065 | <<locked>> | 88% | 44,237 psi | 86% | 2651 fps | 97.2% |
| Lovex S070 | <<locked>> | 90% | 44,918 psi | 87% | 2684 fps | 96.2% |
| Norma 203B | <<locked>> | 82% | 44,933 psi | 87% | 2694 fps | 99.4% |
| Norma MRPᴾ | <<locked>> | 100% | 46,586 psi | 90% | 2848 fps | 96.3% |
| Norma URP | <<locked>> | 92% | 45,818 psi | 89% | 2753 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 82% | 44,759 psi | 87% | 2713 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 92% | 44,730 psi | 87% | 2746 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,187 psi | 70% | 1785 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 46,325 psi | 90% | 2690 fps | 97% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 44,889 psi | 87% | 2799 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 46,166 psi | 90% | 2785 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 45,513 psi | 88% | 2799 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 86% | 45,339 psi | 88% | 2697 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 44,237 psi | 86% | 2651 fps | 97.2% |
| Shooters World Precision | <<locked>> | 82% | 44,614 psi | 87% | 2651 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 90% | 44,918 psi | 87% | 2684 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 43,671 psi | 85% | 2697 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 44,831 psi | 87% | 2575 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 45,992 psi | 89% | 2700 fps | 99.7% |
| Somchem S365 | <<locked>> | 94% | 44,077 psi | 86% | 2762 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 46,456 psi | 90% | 2641 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 43,888 psi | 85% | 2628 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 90% | 45,063 psi | 88% | 2703 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 82% | 45,208 psi | 88% | 2644 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 44,251 psi | 86% | 2707 fps | 98.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,905 psi | 89% | 2802 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 44,773 psi | 87% | 2680 fps | 99.7% |
| Winchester 760 | <<locked>> | 90% | 45,977 psi | 89% | 2759 fps | 96.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,333 psi | 73% | 2740 fps | 99.4% |
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>> | 96% | 38,276 psi | 74% | 2589 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 41,350 psi | 80% | 2598 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 32,822 psi | 64% | 2480 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 40,161 psi | 78% | 2566 fps | 98% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,018 psi | 84% | 2753 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,740 psi | 77% | 2585 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,859 psi | 83% | 2654 fps | 98.7% |
| Alliant Reloder-16 | 37.5 gr | 82% | 32,982 psi | 64% | 2493 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,534 psi | 67% | 2562 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 90% | 30,429 psi | 59% | 2451 fps | 95.8% |
| Alliant Reloder-26 | 46.4 gr | 92% | 35,172 psi | 68% | 2631 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 39,755 psi | 77% | 2595 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 80% | 40,451 psi | 79% | 2598 fps | 97.1% |
| Hodgdon H414 | <<locked>> | 88% | 42,902 psi | 83% | 2700 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,369 psi | 55% | 2336 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,760 psi | 52% | 1562 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,192 psi | 82% | 2602 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,090 psi | 82% | 2602 fps | 95% |
| IMR 4831 | <<locked>> | 84% | 34,069 psi | 66% | 2493 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 41,945 psi | 81% | 2602 fps | 99.6% |
| Lovex S065 | <<locked>> | 82% | 36,941 psi | 72% | 2497 fps | 95% |
| Lovex S070 | <<locked>> | 88% | 42,308 psi | 82% | 2631 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 42,221 psi | 82% | 2644 fps | 99% |
| Norma MRP | <<locked>> | 98% | 43,497 psi | 84% | 2785 fps | 95.3% |
| Norma URP | <<locked>> | 82% | 33,127 psi | 64% | 2484 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 41,800 psi | 81% | 2654 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 39,363 psi | 76% | 2635 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,006 psi | 52% | 1594 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,799 psi | 79% | 2582 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,724 psi | 71% | 2628 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 34,795 psi | 68% | 2549 fps | 95.5% |
| ReloadSwiss RS 70 | 43 gr | 86% | 37,144 psi | 72% | 2615 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 37,202 psi | 72% | 2536 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 82% | 36,941 psi | 72% | 2497 fps | 95% |
| Shooters World Precision | <<locked>> | 80% | 41,945 psi | 81% | 2602 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 42,308 psi | 82% | 2631 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,334 psi | 74% | 2589 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,508 psi | 77% | 2480 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 37,956 psi | 74% | 2543 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 27,876 psi | 54% | 2382 fps | 96.5% |
| Vihtavuori N135 | <<locked>> | 80% | 43,526 psi | 85% | 2595 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,129 psi | 70% | 2477 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 34,519 psi | 67% | 2484 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 42,554 psi | 83% | 2598 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 33,924 psi | 66% | 2484 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 88% | 30,908 psi | 60% | 2474 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,981 psi | 62% | 2405 fps | 96.9% |
| Winchester 760 | <<locked>> | 88% | 42,902 psi | 83% | 2700 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 92% | 28,790 psi | 56% | 2474 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 49 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 123gr | Lapua Scenar. Norma MRP delivers the highest muzzle velocity at 2,848 fps; across all powders the maximum-charge window runs from 1,742 fps to 2,848 fps. Accurate 3100 gives the best case fill at 100 %, and 49 of the 49 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (355 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. The 123.0 gr projectile in 0.264" calls for a 1:9.0 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, Alliant Reloder-16 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 123gr | Lapua Scenar 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.