Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 120gr | Sako Powerhead Blade bullet and 51 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, ReloadSwiss RS 70 and Alliant Reloder-17.
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% | 44,106 psi | 86% | 2651 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 44,454 psi | 86% | 2697 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 43,743 psi | 85% | 2756 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 86% | 46,325 psi | 90% | 2723 fps | 98.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 44,106 psi | 86% | 2808 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 46,006 psi | 89% | 2743 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 84% | 46,325 psi | 90% | 2759 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 94% | 45,919 psi | 89% | 2825 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 90% | 46,137 psi | 90% | 2851 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,363 psi | 76% | 2713 fps | 98.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,338 psi | 86% | 2877 fps | 98.1% |
| Bofors RP3 | <<locked>> | 86% | 45,963 psi | 89% | 2749 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 84% | 43,947 psi | 85% | 2707 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 45,295 psi | 88% | 2756 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 44,585 psi | 87% | 2753 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,331 psi | 69% | 1762 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 45,803 psi | 89% | 2707 fps | 99% |
| IMR 4831 | <<locked>> | 94% | 44,991 psi | 87% | 2759 fps | 98.4% |
| IMR 4895 | <<locked>> | 82% | 44,614 psi | 87% | 2736 fps | 99.2% |
| Lovex S062 | <<locked>> | 84% | 45,614 psi | 89% | 2707 fps | 99.8% |
| Lovex S065 | <<locked>> | 90% | 44,860 psi | 87% | 2697 fps | 97.1% |
| Lovex S070 | <<locked>> | 92% | 45,527 psi | 88% | 2726 fps | 96.1% |
| Norma 203B | <<locked>> | 84% | 45,629 psi | 89% | 2746 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 43,584 psi | 85% | 2749 fps | 98% |
| Ramshot Big Game | <<locked>> | 84% | 45,745 psi | 89% | 2766 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 94% | 45,658 psi | 89% | 2795 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,752 psi | 69% | 1801 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 44,309 psi | 86% | 2687 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 46,456 psi | 90% | 2818 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 45,876 psi | 89% | 2854 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 43,685 psi | 85% | 2776 fps | 97.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 46,528 psi | 90% | 2854 fps | 98.1% |
| Rottweil R 902 | <<locked>> | 82% | 44,527 psi | 86% | 2667 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 88% | 46,195 psi | 90% | 2749 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 44,860 psi | 87% | 2697 fps | 97.1% |
| Shooters World Precision | <<locked>> | 84% | 45,614 psi | 89% | 2707 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 92% | 45,527 psi | 88% | 2726 fps | 96.1% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 44,657 psi | 87% | 2753 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 45,847 psi | 89% | 2628 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 43,816 psi | 85% | 2697 fps | 99.3% |
| Somchem S365 | <<locked>> | 96% | 44,556 psi | 87% | 2808 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 44,266 psi | 86% | 2648 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 45,005 psi | 87% | 2661 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 44,875 psi | 87% | 2684 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 92% | 45,774 psi | 89% | 2753 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 84% | 46,238 psi | 90% | 2700 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 44,802 psi | 87% | 2749 fps | 98% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,221 psi | 84% | 2789 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 45,832 psi | 89% | 2733 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,273 psi | 69% | 2710 fps | 98.5% |
| Winchester StaBALL Match | <<locked>> | 82% | 46,267 psi | 90% | 2746 fps | 99.6% |
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% | 40,988 psi | 80% | 2595 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 38,812 psi | 75% | 2589 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,346 psi | 69% | 2575 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 38,435 psi | 75% | 2566 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,104 psi | 80% | 2746 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,043 psi | 74% | 2585 fps | 98.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,857 psi | 79% | 2651 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,520 psi | 69% | 2592 fps | 95.9% |
| Alliant Reloder-17 | 39.4 gr | 80% | 32,706 psi | 64% | 2546 fps | 96.6% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,690 psi | 60% | 2490 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 94% | 35,781 psi | 69% | 2680 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 37,536 psi | 73% | 2585 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 80% | 38,421 psi | 75% | 2589 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,618 psi | 59% | 2434 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,524 psi | 81% | 2697 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,411 psi | 51% | 1578 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,321 psi | 78% | 2598 fps | 98% |
| IMR 4831 | <<locked>> | 86% | 34,185 psi | 66% | 2533 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 41,858 psi | 81% | 2680 fps | 98.7% |
| Lovex S062 | <<locked>> | 80% | 39,929 psi | 78% | 2598 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 39,668 psi | 77% | 2592 fps | 95.6% |
| Lovex S070 | <<locked>> | 90% | 42,772 psi | 83% | 2674 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 40,219 psi | 78% | 2638 fps | 98.4% |
| Norma URP | <<locked>> | 86% | 35,607 psi | 69% | 2579 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 39,769 psi | 77% | 2648 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 39,784 psi | 77% | 2677 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,614 psi | 52% | 1611 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,655 psi | 81% | 2635 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,149 psi | 84% | 2756 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,853 psi | 68% | 2615 fps | 99.4% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 35,157 psi | 68% | 2592 fps | 95.3% |
| ReloadSwiss RS 70 | 44 gr | 88% | 37,826 psi | 73% | 2664 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 41,800 psi | 81% | 2615 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 35,302 psi | 69% | 2530 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,668 psi | 77% | 2592 fps | 95.6% |
| Shooters World Precision | <<locked>> | 80% | 39,929 psi | 78% | 2598 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 90% | 42,772 psi | 83% | 2674 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,405 psi | 71% | 2582 fps | 97.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,768 psi | 73% | 2484 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 35,955 psi | 70% | 2533 fps | 97.8% |
| Somchem S365 | 37.4 gr | 80% | 26,107 psi | 51% | 2356 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 41,423 psi | 80% | 2598 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,250 psi | 82% | 2612 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,447 psi | 67% | 2474 fps | 98.6% |
| Vihtavuori N160 | <<locked>> | 84% | 34,853 psi | 68% | 2526 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 40,596 psi | 79% | 2598 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 36,840 psi | 72% | 2585 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 92% | 33,127 psi | 64% | 2569 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,400 psi | 59% | 2392 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,719 psi | 60% | 2569 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,163 psi | 84% | 2690 fps | 99.3% |
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 51 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 120gr | Sako Powerhead Blade. Alliant Reloder-26 delivers the highest muzzle velocity at 2,877 fps; across all powders the maximum-charge window runs from 1,762 fps to 2,877 fps. Alliant Reloder-23 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 69–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, 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. Somchem S365, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 120gr | Sako Powerhead Blade 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.