Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 121gr | Lehigh Defense Match Solid bullet and 58 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-17 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 2495 | <<locked>> | 82% | 45,324 psi | 88% | 2648 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 42,250 psi | 82% | 2684 fps | 96.1% |
| Accurate 4064 | <<locked>> | 84% | 45,890 psi | 89% | 2697 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 44,802 psi | 87% | 2753 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 84% | 44,353 psi | 86% | 2664 fps | 98.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 44,701 psi | 87% | 2802 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 44,193 psi | 86% | 2690 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 82% | 44,483 psi | 86% | 2703 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 94% | 46,586 psi | 90% | 2815 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 88% | 43,772 psi | 85% | 2785 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,292 psi | 78% | 2713 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,223 psi | 88% | 2877 fps | 98.3% |
| Bofors RP3 | <<locked>> | 84% | 43,990 psi | 85% | 2697 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 84% | 44,715 psi | 87% | 2697 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 88% | 45,513 psi | 88% | 2766 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 46,064 psi | 89% | 2749 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 45,527 psi | 88% | 2753 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,592 psi | 69% | 1752 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 46,586 psi | 90% | 2710 fps | 99.6% |
| IMR 3031 | <<locked>> | 82% | 45,194 psi | 88% | 2697 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 46,006 psi | 89% | 2690 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 86% | 45,556 psi | 88% | 2654 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 46,441 psi | 90% | 2700 fps | 95.9% |
| IMR 4831 | <<locked>> | 98% | 46,557 psi | 90% | 2769 fps | 98.7% |
| IMR 4895 | <<locked>> | 82% | 45,585 psi | 89% | 2733 fps | 99.3% |
| Lovex S062 | <<locked>> | 84% | 46,311 psi | 90% | 2697 fps | 99.9% |
| Lovex S065 | <<locked>> | 90% | 45,977 psi | 89% | 2697 fps | 97.3% |
| Lovex S070 | <<locked>> | 92% | 46,383 psi | 90% | 2723 fps | 96.3% |
| Norma 203B | <<locked>> | 82% | 43,801 psi | 85% | 2690 fps | 99% |
| Norma URP | <<locked>> | 92% | 44,396 psi | 86% | 2743 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 84% | 46,485 psi | 90% | 2759 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 94% | 46,195 psi | 90% | 2789 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,085 psi | 70% | 1791 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 45,324 psi | 88% | 2684 fps | 96.4% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 43,787 psi | 85% | 2795 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 44,324 psi | 86% | 2769 fps | 98% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 44,251 psi | 86% | 2789 fps | 97.5% |
| Rottweil R 902 | <<locked>> | 82% | 45,542 psi | 88% | 2664 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 86% | 44,150 psi | 86% | 2690 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 45,977 psi | 89% | 2697 fps | 97.3% |
| Shooters World Precision | <<locked>> | 84% | 46,311 psi | 90% | 2697 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 92% | 46,383 psi | 90% | 2723 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 45,353 psi | 88% | 2746 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 43,787 psi | 85% | 2575 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 45,672 psi | 89% | 2644 fps | 95.8% |
| Somchem S355 | <<locked>> | 86% | 44,889 psi | 87% | 2697 fps | 99.4% |
| Somchem S365 | <<locked>> | 96% | 45,455 psi | 88% | 2805 fps | 100% |
| Unknown powder | <<locked>> | 90% | 45,397 psi | 88% | 2753 fps | 97.8% |
| Vihtavuori N135 | <<locked>> | 82% | 45,194 psi | 88% | 2641 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 45,905 psi | 89% | 2654 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 45,643 psi | 89% | 2677 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 46,572 psi | 90% | 2746 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 82% | 44,150 psi | 86% | 2644 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 45,672 psi | 89% | 2746 fps | 98.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,324 psi | 86% | 2792 fps | 98.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 46,325 psi | 90% | 2723 fps | 99.7% |
| Winchester 760 | <<locked>> | 88% | 45,513 psi | 88% | 2766 fps | 95.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,071 psi | 70% | 2713 fps | 98.8% |
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 2495 | <<locked>> | 80% | 42,438 psi | 82% | 2598 fps | 100% |
| Accurate 3100 | <<locked>> | 98% | 39,508 psi | 77% | 2628 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 40,161 psi | 78% | 2595 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 33,953 psi | 66% | 2523 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 39,175 psi | 76% | 2562 fps | 97.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,989 psi | 82% | 2746 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,682 psi | 75% | 2579 fps | 98.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,510 psi | 81% | 2641 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 84% | 34,185 psi | 66% | 2536 fps | 95.3% |
| Alliant Reloder-17 | 38.9 gr | 80% | 33,620 psi | 65% | 2552 fps | 97% |
| Alliant Reloder-23 | <<locked>> | 90% | 29,660 psi | 58% | 2438 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 94% | 36,535 psi | 71% | 2680 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 38,421 psi | 75% | 2582 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 80% | 39,436 psi | 77% | 2592 fps | 96.5% |
| Hodgdon H414 | <<locked>> | 86% | 42,438 psi | 82% | 2703 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 29,370 psi | 57% | 2379 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,103 psi | 78% | 2648 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,571 psi | 52% | 1565 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,118 psi | 80% | 2605 fps | 98.9% |
| IMR 3031 | <<locked>> | 80% | 42,279 psi | 82% | 2648 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,348 psi | 74% | 2536 fps | 97.5% |
| IMR 4166 Enduron | <<locked>> | 84% | 43,163 psi | 84% | 2608 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 43,453 psi | 84% | 2641 fps | 95% |
| IMR 4831 | <<locked>> | 88% | 33,765 psi | 66% | 2503 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 42,511 psi | 83% | 2674 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 40,872 psi | 79% | 2595 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 38,261 psi | 74% | 2539 fps | 95.1% |
| Lovex S070 | <<locked>> | 90% | 43,613 psi | 85% | 2671 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 40,857 psi | 79% | 2631 fps | 98.5% |
| Norma URP | <<locked>> | 84% | 34,330 psi | 67% | 2526 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 40,712 psi | 79% | 2648 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 40,596 psi | 79% | 2674 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,832 psi | 52% | 1601 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,337 psi | 82% | 2628 fps | 95.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,752 psi | 69% | 2618 fps | 99.6% |
| ReloadSwiss RS 62 | 41.7 gr | 86% | 36,027 psi | 70% | 2595 fps | 95.6% |
| ReloadSwiss RS 70 | 43.4 gr | 88% | 38,595 psi | 75% | 2664 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 42,786 psi | 83% | 2615 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 36,143 psi | 70% | 2526 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 84% | 38,261 psi | 74% | 2539 fps | 95.1% |
| Shooters World Precision | <<locked>> | 80% | 40,872 psi | 79% | 2595 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 90% | 43,613 psi | 85% | 2671 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,289 psi | 72% | 2582 fps | 97.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,508 psi | 75% | 2477 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 42,641 psi | 83% | 2589 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 36,927 psi | 72% | 2533 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 26,876 psi | 52% | 2362 fps | 95.5% |
| Unknown powder | <<locked>> | 84% | 37,246 psi | 72% | 2585 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 42,337 psi | 82% | 2595 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,830 psi | 83% | 2602 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,099 psi | 68% | 2470 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 35,766 psi | 69% | 2530 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 41,539 psi | 81% | 2595 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 35,114 psi | 68% | 2526 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 90% | 31,966 psi | 62% | 2520 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,256 psi | 61% | 2398 fps | 96.3% |
| Winchester 760 | <<locked>> | 86% | 42,438 psi | 82% | 2703 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 94% | 29,631 psi | 58% | 2513 fps | 95.4% |
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 81 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 121gr | Lehigh Defense Match Solid. Alliant Reloder-26 delivers the highest muzzle velocity at 2,877 fps; across all powders the maximum-charge window runs from 1,752 fps to 2,877 fps. Accurate 3100 gives the best case fill at 100 %, and 81 of the 81 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (355 MPa), the top charges use 68–90 %, leaving at least 10 % headroom. The 121.0 gr projectile in 0.264" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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. ReloadSwiss RS 70, Alliant Reloder-17, ReloadSwiss RS 62 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 121gr | Lehigh Defense Match Solid they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, ADI AR 2209, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.